C# WinForm 界面控件

C# WinForm是一种GUI应用程序框架，它允许开发人员使用各种控件来创建丰富的用户界面。以下是一些C# WinForm中常见的界面控件：这些界面控件在C# WinForm应用程序开发中非常常见，开发人员可以借助它们来快速创建各种类型的用户界面。

Button：按钮控件，用于添加按钮到用户界面以执行操作。
Label：标签控件，用于在用户界面上显示文本。
TextBox：文本框控件，允许用户输入文本信息。
ComboBox：组合框控件，用于在下拉列表中显示选项。
ListBox：列表框控件，用于在列表中显示多个选项。
RadioButton：单选按钮控件，可供用户进行单选选择。
CheckBox：复选框控件，可供用户进行多选选择。
DateTimePicker：日期时间选择控件，允许用户选择日期和时间。
ProgressBar：进度条控件，用于显示操作进度。

按钮与编辑框的使用

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading;

using System.Windows.Forms;

namespace WindowsFormsApplication1

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private void button1_Click(object sender, EventArgs e)

        {

            int start = int.Parse(textBox1.Text);

            int end = int.Parse(textBox2.Text);

            for (int x = start; x < end; x++)

            {

                progressBar1.Value += 1;

                Thread.Sleep(100);

            }

        }

    }

}

listView

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

using System.Threading;

namespace WindowsFormsApplication5

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private void Form1_Load(object sender, EventArgs e)

        {

            ColumnHeader Uid = new ColumnHeader();

            Uid.Text = "UID";

            Uid.Width = 100;

            Uid.TextAlign = HorizontalAlignment.Left;

            this.listView1.Columns.Add(Uid);

            ColumnHeader Uname = new ColumnHeader();

            Uname.Text = "UNAME";

            Uname.Width = 100;

            Uname.TextAlign = HorizontalAlignment.Left;

            this.listView1.Columns.Add(Uname);

            ColumnHeader Uage = new ColumnHeader();

            Uage.Text = "UAGE";

            Uage.Width = 100;

            Uage.TextAlign = HorizontalAlignment.Left;

            this.listView1.Columns.Add(Uage);

        }

        private void button1_Click(object sender, EventArgs e)

        {

            // tianjia shuju

            this.listView1.BeginUpdate();  //数据更新，UI暂时挂起

            this.listView1.Items.Clear(); //只移除所有的项。

            for (int x = 0; x < 100; x++)

            {

                ListViewItem lv = new ListViewItem();

                lv.ImageIndex = x;

                lv.Text = "UUID -> " + x;

                lv.SubItems.Add("第2列");

                lv.SubItems.Add("第3列" + x + "行");

                this.listView1.Items.Add(lv);

            }

            this.listView1.EndUpdate();  //结束数据处理，UI界面一次性绘制。

        }

    }

}

MID 窗体设计:

1.首先插入新的子窗体form1，并设置IsMdiContainer = True 属性。

2.zi chuang ti bing she zhi ta men de fu chuang ti

form1.cs

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

namespace WindowsFormsApplication3

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private void Form1_Load(object sender, EventArgs e)

        {

            Form2 frm2 = new Form2();

            frm2.Show();

            frm2.MdiParent = this;

            // pai lie

            LayoutMdi(MdiLayout.TileHorizontal);

        }

    }

}

ji suan qi

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

namespace 练习25

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private void Form1_Load(object sender, EventArgs e)

        {

            comboBox1.SelectedIndex = 0;

        }

        private void button1_Click(object sender, EventArgs e)

        {

            try

            {

                int n1 = Convert.ToInt32(textBox1.Text.Trim());

                int n2 = Convert.ToInt32(textBox2.Text.Trim());

                string oper = comboBox1.SelectedItem.ToString();

                switch (oper)

                {

                    case "+": label1.Text = (n1 + n2).ToString();

                        break;

                    case "-": label1.Text = (n1 - n2).ToString();

                        break;

                    case "*": label1.Text = (n1 * n2).ToString();

                        break;

                    case "/": label1.Text = (n1 / n2).ToString();

                        break;

                    default: MessageBox.Show("请选择正确的操作符");

                        break;

                }

            }

            catch

            {

                MessageBox.Show("请输入正确的数字");

            }

        }

    }

}

浏览器控件的使用

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

namespace _03_浏览器控件

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private void button1_Click(object sender, EventArgs e)

        {

            string text = textBox1.Text;

            Uri uri = new Uri("http://"+text);

            webBrowser1.Url = uri;

        }

    }

}

ComboBox 控件

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

namespace _04ComboBox

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private void button1_Click(object sender, EventArgs e)

        {

            //通过代码给下拉框添加数据

            comboBox2.Items.Add("张三");

            comboBox2.Items.Add("李四");

            comboBox2.Items.Add("王五");

        }

        private void button2_Click(object sender, EventArgs e)

        {

            comboBox2.Items.Clear();

        }

    }

}

ComboBox 日期时间控件

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

namespace _05日期选择器

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private void Form1_Load(object sender, EventArgs e)

        {

            //程序加载的时候 将年份添加到下拉框中

            //获得当前的年份

            int year = DateTime.Now.Year;

            for (int i = year; i >= 1949; i--)

            {

                cboYear.Items.Add(i + "年");

            }

        }

        /// 当年份发生改变的时候 加载月份

        private void cboYear_SelectedIndexChanged(object sender, EventArgs e)

        {

            //添加之前应该清空之前的内容

            cboMonth.Items.Clear();

            for (int i = 1; i <= 12; i++)

            {

                cboMonth.Items.Add(i + "月");

            }

        }

        /// 当月份发生改变的时候 加载天

        private void cboMonth_SelectedIndexChanged(object sender, EventArgs e)

        {

            cboDays.Items.Clear();

            int day = 0;//定义一个变量来存储天数

            //获得月份 7月 12

            string strMonth = cboMonth.SelectedItem.ToString().Split(new char[] { '月' }, StringSplitOptions.RemoveEmptyEntries)[0];

            string strYear = cboYear.SelectedItem.ToString().Split(new char[] { '年' }, StringSplitOptions.RemoveEmptyEntries)[0];

            // MessageBox.Show(cboMonth.SelectedItem.ToString());

            int year = Convert.ToInt32(strYear);

            int month = Convert.ToInt32(strMonth);

            switch (month)

            {

                case 1:

                case 3:

                case 5:

                case 7:

                case 8:

                case 10:

                case 12: day = 31;

                    break;

                case 2:

                    if ((year % 400 == 0) || (year % 4 == 0 && year % 100 != 0))

                    {

                        day = 29;

                    }

                    else

                    {

                        day = 28;

                    }

                    break;

                default: day = 30;

                    break;

            }

            for (int i = 1; i <= day; i++)

            {

                cboDays.Items.Add(i + "日");

            }

        }

    }

}

ListBox 遍历与选中

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

namespace _06ListBox控件

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private void Form1_Load(object sender, EventArgs e)

        {

            listBox1.Items.Add(1);

            listBox1.Items.Add(200000);

        }

        // 遍历选中

        private void button1_Click(object sender, EventArgs e)

        {

            for(int x=0;x<listBox1.Items.Count;x++)

            {

                if (listBox1.SelectedItems.Contains(listBox1.Items[x]))

                {

                    MessageBox.Show(listBox1.Items[x].ToString());

                }

            }

        }

    }

}

实现图片预览： 左面ListBox控件，右面是一个pictureBox控件。

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

using System.IO;

namespace _07实现点击更换照片

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        //用来存储图片文件的全路径

        List<string> list = new List<string>();

        private void Form1_Load(object sender, EventArgs e)

        {

            string[] path = Directory.GetFiles(@"C:\", "*.jpg");

            for (int i = 0; i < path.Length; i++)

            {

                string fileName = Path.GetFileName(path[i]);

                listBox1.Items.Add(fileName);

                //将图片的全路径添加到List泛型集合中

                list.Add(path[i]);

                //listBox1.Items.Add(path[i]);

            }

        }

        /// 双击播放图片

        private void listBox1_DoubleClick(object sender, EventArgs e)

        {

            pictureBox1.Image = Image.FromFile(list[listBox1.SelectedIndex]);

        }

    }

}

双击播放音乐：

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

using System.IO;

using System.Media;

namespace _08双击播放音乐

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        //存储音乐文件的全路径

        List<string> listSongs = new List<string>();

        private void Form1_Load(object sender, EventArgs e)

        {

            string[] path = Directory.GetFiles(@"C:\Music", "*.wav");

            for (int i = 0; i < path.Length; i++)

            {

                string fileName = Path.GetFileName(path[i]);

                listBox1.Items.Add(fileName);

                //将音乐文件的全路径存到泛型集合中

                listSongs.Add(path[i]);

            }

        }

        private void listBox1_DoubleClick(object sender, EventArgs e)

        {

            SoundPlayer sp = new SoundPlayer();

            sp.SoundLocation=listSongs[listBox1.SelectedIndex];

            sp.Play();

        }

    }

}

打开一个txt文件(打开文件对话框)： 一个放大了的textbox

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

using System.IO;

namespace _10打开对话框

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private void button1_Click(object sender, EventArgs e)

        {

            //点击弹出对话框

            OpenFileDialog ofd = new OpenFileDialog();

            //设置对话框的标题

            ofd.Title = "请选择要打开的文本";

            //设置对话框可以多选

            ofd.Multiselect = true;

            //设置对话框的初始目录

            ofd.InitialDirectory = @"C:\";

            //设置对话框的文件类型

            ofd.Filter = "文本文件|*.txt|媒体文件|*.wmv|图片文件|*.jpg|所有文件|*.*";

            //展示对话框

            ofd.ShowDialog();

            //获得在打开对话框中选中文件的路径

            string path = ofd.FileName;

            if (path == "")

            {

                return;

            }

            using (FileStream fsRead = new FileStream(path, FileMode.OpenOrCreate, FileAccess.Read))

            {

                byte[] buffer = new byte[1024 * 1024 * 5];

                //实际读取到的字节数

                int r = fsRead.Read(buffer, 0, buffer.Length);

                textBox1.Text = Encoding.Default.GetString(buffer, 0, r);

            }

        }

    }

}

保存文件对话框：

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.IO;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

namespace _11_保存文件对话框

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private void button1_Click(object sender, EventArgs e)

        {

            SaveFileDialog sfd = new SaveFileDialog();

            sfd.Title = "请选择要保存的路径";

            sfd.InitialDirectory = @"C:\";

            sfd.Filter = "文本文件|*.txt|所有文件|*.*";

            sfd.ShowDialog();

            //获得保存文件的路径

            string path = sfd.FileName;

            if (path == "")

            {

                return;

            }

            using (FileStream fsWrite = new FileStream(path, FileMode.OpenOrCreate, FileAccess.Write))

            {

                byte[] buffer = Encoding.Default.GetBytes(textBox1.Text);

                fsWrite.Write(buffer, 0, buffer.Length);

            }

            MessageBox.Show("保存成功");

        }

    }

}

字体颜色对话框

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

namespace _12_字体和颜色对话框

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        /// 字体对话框

        private void button1_Click(object sender, EventArgs e)

        {

            FontDialog fd = new FontDialog();

            fd.ShowDialog();

            textBox1.Font = fd.Font;

        }

        private void button2_Click(object sender, EventArgs e)

        {

            ColorDialog cd = new ColorDialog();

            cd.ShowDialog();

            textBox1.ForeColor = cd.Color;

        }

        private void Form1_Load(object sender, EventArgs e)

        {

        }

    }

}

panel 显示隐藏面板

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

namespace _13_Panel

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private void button1_Click(object sender, EventArgs e)

        {

            panel1.Visible = true;

        }

        private void button2_Click(object sender, EventArgs e)

        {

            panel1.Visible = false;

        }

        private void Form1_Load(object sender, EventArgs e)

        {

        }

    }

}

简易记事本

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.IO;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

namespace _14_记事儿本应用程序

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private void Form1_Load(object sender, EventArgs e)

        {

            //加载程序的时候 隐藏panel

            panel1.Visible = false;

            //取消文本框的自动换行功能

            textBox1.WordWrap = false;

        }

        /// 点击按钮的时候 隐藏panel

        private void button1_Click(object sender, EventArgs e)

        {

            panel1.Visible = false;

        }

        private void 显示ToolStripMenuItem_Click(object sender, EventArgs e)

        {

            panel1.Visible = true;

        }

        private void 影藏ToolStripMenuItem_Click(object sender, EventArgs e)

        {

            panel1.Visible = false;

        }

        List<string> list = new List<string>();

        /// 打开对话框

        private void 打开ToolStripMenuItem_Click(object sender, EventArgs e)

        {

            OpenFileDialog ofd = new OpenFileDialog();

            ofd.Title = "请选择要打开的文本文件";

            ofd.InitialDirectory = @"C:\Users\SpringRain\Desktop";

            ofd.Multiselect = true;

            ofd.Filter = "文本文件|*.txt|所有文件|*.*";

            ofd.ShowDialog();

            //获得用户选中的文件的路径

            string path = ofd.FileName;

            //将文件的全路径存储到泛型集合中

            list.Add(path);

            //获得了用户打开文件的文件名

            string fileName = Path.GetFileName(path);

            //将文件名放到ListBox中

            listBox1.Items.Add(fileName);

            if (path == "")

            {

                return;

            }

            using (FileStream fsRead = new FileStream(path, FileMode.OpenOrCreate, FileAccess.Read))

            {

                byte[] buffer = new byte[1024 * 1024 * 5];

                int r = fsRead.Read(buffer, 0, buffer.Length);

                textBox1.Text = Encoding.Default.GetString(buffer, 0, r);

            }

        }

        /// 保存对话框

        private void 保存ToolStripMenuItem_Click(object sender, EventArgs e)

        {

            SaveFileDialog sfd = new SaveFileDialog();

            sfd.InitialDirectory = @"C:\Users\SpringRain\Desktop";

            sfd.Title = "请选择要保存的文件路径";

            sfd.Filter = "文本文件|*.txt|所有文件|*.*";

            sfd.ShowDialog();

            //获得用户要保存的文件的路径

            string path = sfd.FileName;

            if (path == "")

            {

                return;

            }

            using (FileStream fsWrite = new FileStream(path, FileMode.OpenOrCreate, FileAccess.Write))

            {

                byte[] buffer = Encoding.Default.GetBytes(textBox1.Text);

                fsWrite.Write(buffer, 0, buffer.Length);

            }

            MessageBox.Show("保存成功");

        }

        private void 自动换行ToolStripMenuItem_Click(object sender, EventArgs e)

        {

            if (自动换行ToolStripMenuItem.Text == "☆自动换行")

            {

                textBox1.WordWrap = true;

                自动换行ToolStripMenuItem.Text = "★取消自动换行";

            }

            else if (自动换行ToolStripMenuItem.Text == "★取消自动换行")

            {

                textBox1.WordWrap = false;

                自动换行ToolStripMenuItem.Text = "☆自动换行";

            }

        }

        private void 字体ToolStripMenuItem_Click(object sender, EventArgs e)

        {

            FontDialog fd = new FontDialog();

            fd.ShowDialog();

            textBox1.Font = fd.Font;

        }

        private void 颜色ToolStripMenuItem_Click(object sender, EventArgs e)

        {

            ColorDialog cd = new ColorDialog();

            cd.ShowDialog();

            textBox1.ForeColor = cd.Color;

        }

        /// 双击打开对应的文件

        private void listBox1_DoubleClick(object sender, EventArgs e)

        {

            //要获得双击的文件所对应的全路径

            string path = list[listBox1.SelectedIndex];

            using (FileStream fsRead = new FileStream(path, FileMode.OpenOrCreate, FileAccess.Read))

            {

                byte[] buffer = new byte[1024 * 1024 * 5];

                int r = fsRead.Read(buffer, 0, buffer.Length);

                textBox1.Text = Encoding.Default.GetString(buffer, 0, r);

            }

        }

    }

}

音乐选择框

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

using System.IO;

using System.Media;

namespace _01复习

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        //用来存储音乐文件的全路径

        List<string> listSongs = new List<string>();

        private void button1_Click(object sender, EventArgs e)

        {

            OpenFileDialog ofd = new OpenFileDialog();

            ofd.Title = "请选择音乐文件";

            ofd.InitialDirectory = @"C:\Users\SpringRain\Desktop\Music";

            ofd.Multiselect = true;

            ofd.Filter = "音乐文件|*.wav|所有文件|*.*";

            ofd.ShowDialog();

            //获得我们在文件夹中选择所有文件的全路径

            string[] path = ofd.FileNames;

            for (int i = 0; i < path.Length; i++)

            {

                //将音乐文件的文件名加载到ListBox中

                listBox1.Items.Add(Path.GetFileName(path[i]));

                //将音乐文件的全路径存储到泛型集合中

                listSongs.Add(path[i]);

            }

        }

        /// 实现双击播放

        SoundPlayer sp = new SoundPlayer();

        private void listBox1_DoubleClick(object sender, EventArgs e)

        {

            sp.SoundLocation=listSongs[listBox1.SelectedIndex];

            sp.Play();

        }

        /// 点击下一曲

        private void button3_Click(object sender, EventArgs e)

        {

            //获得当前选中歌曲的索引

            int index = listBox1.SelectedIndex;

            index++;

            if (index == listBox1.Items.Count)

            {

                index = 0;

            }

            //将改变后的索引重新的赋值给我当前选中项的索引

            listBox1.SelectedIndex = index;

            sp.SoundLocation = listSongs[index];

            sp.Play();

        }

        /// 点击上一曲

        private void button2_Click(object sender, EventArgs e)

        {

            int index = listBox1.SelectedIndex;

            index--;

            if (index < 0)

            {

                index = listBox1.Items.Count-1;

            }

            //将重新改变后的索引重新的赋值给当前选中项

            listBox1.SelectedIndex = index;

            sp.SoundLocation = listSongs[index];

            sp.Play();

        }

        private void Form1_Load(object sender, EventArgs e)

        {

        }

    }

}

标签与随机数：

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading;

using System.Threading.Tasks;

using System.Windows.Forms;

namespace _05_摇奖机应用程序

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        bool b = false;

        private void button1_Click(object sender, EventArgs e)

        {

            if (b == false)

            {

                b = true;

                button1.Text = "停止";

                Thread th = new Thread(PlayGame);

                th.IsBackground = true;

                th.Name = "新线程";

               // th.

                th.Start();

            }

            else//b==true

            {

                b = false;

                button1.Text = "开始";

            }

            //PlayGame();

        }

        private void PlayGame()

        {

            Random r = new Random();

            while (b)

            {

                label1.Text = r.Next(0, 10).ToString();

                label2.Text = r.Next(0, 10).ToString();

                label3.Text = r.Next(0, 10).ToString();

            }

        }

        private void Form1_Load(object sender, EventArgs e)

        {

            Control.CheckForIllegalCrossThreadCalls = false;

        }

    }

}

Socket - client

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.IO;

using System.Linq;

using System.Net;

using System.Net.Sockets;

using System.Text;

using System.Threading;

using System.Threading.Tasks;

using System.Windows.Forms;

namespace Client

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        Socket socket;

        private void btnStart_Click(object sender, EventArgs e)

        {

            try

            {

                socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

                IPAddress ip = IPAddress.Parse(txtServer.Text);

                IPEndPoint point = new IPEndPoint(ip, Convert.ToInt32(txtPort.Text));

                socket.Connect(point);

                ShowMsg("连接成功");

                Thread th = new Thread(Rec);

                th.IsBackground = true;

                th.Start();

            }

            catch

            { }

        }

        void Rec()

        {

            while (true)

            {

                try

                {

                    byte[] buffer = new byte[1024 * 1024 * 3];

                    int r = socket.Receive(buffer);

                    if (buffer[0] == 0)

                    {

                        string s = Encoding.UTF8.GetString(buffer, 1, r-1);

                        ShowMsg(s);

                    }

                    else if (buffer[0] == 1)

                    {

                        SaveFileDialog sfd = new SaveFileDialog();

                        sfd.Filter = "所有文件|*.*";

                        sfd.ShowDialog(this);

                        string path = sfd.FileName;

                        using (FileStream fsWrite = new FileStream(path, FileMode.OpenOrCreate, FileAccess.Write))

                        {

                            fsWrite.Write(buffer, 1, r - 1);

                        }

                        MessageBox.Show("保存成功");

                    }

                    else

                    {

                        ZD();

                    }

                }

                catch

                { 

                }

            }

        }

        void ZD()

        {

            for (int i = 0; i < 500; i++)

            {

                this.Location = new Point(200, 200);

                this.Location = new Point(210, 210);

            }

        }

        void ShowMsg(string str)

        {

            txtLog.AppendText(str + "\r\n");

        }

        /// 给服务器发送消息

        private void btnSend_Click(object sender, EventArgs e)

        {

            byte[] buffer = Encoding.UTF8.GetBytes(txtMsg.Text);

            socket.Send(buffer);

        }

        private void Form1_Load(object sender, EventArgs e)

        {

            Control.CheckForIllegalCrossThreadCalls = false;

        }

    }

}

socket-server

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.IO;

using System.Linq;

using System.Net;

using System.Net.Sockets;

using System.Text;

using System.Threading;

using System.Threading.Tasks;

using System.Windows.Forms;

namespace Server

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private void btnStart_Click(object sender, EventArgs e)

        {

            try

            {

                Socket socketWatch = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

                IPAddress ip = IPAddress.Any;//IPAddress.Parse(txtServer.Text);

                IPEndPoint point = new IPEndPoint(ip, Convert.ToInt32(txtPort.Text));

                socketWatch.Bind(point);

                ShowMsg("监听成功");

                //去厕所蹲坑

                socketWatch.Listen(10);

                //不停的接收客户端的连接

                Thread th = new Thread(Listen);

                th.IsBackground = true;

                th.Start(socketWatch);

            }

            catch

            { }

        }

        Dictionary<string, Socket> dicSocket = new Dictionary<string, Socket>();

        void Listen(object o)

        {

            Socket socketWatch = o as Socket;

            while (true)

            {

                //循环的接收客户端的连接

                Socket socketSend = socketWatch.Accept();

                //将客户端的IP地址存储到下拉框中

                cboUsers.Items.Add(socketSend.RemoteEndPoint.ToString());

                //将IP地址和这个客户端的Socket放到键值对集合中

                dicSocket.Add(socketSend.RemoteEndPoint.ToString(), socketSend);

                ShowMsg(socketSend.RemoteEndPoint.ToString() + ":" + "连接成功");

                //客户端连接成功后，就应高接收客户端发来的消息

                Thread th = new Thread(Rec);

                th.IsBackground = true;

                th.Start(socketSend);

            }

        }

        void Rec(object o)

        {

            Socket socketSend = o as Socket;

            while (true)

            {

                try

                {

                    byte[] buffer = new byte[1024 * 1024 * 3];

                    int r = socketSend.Receive(buffer);

                    string str = Encoding.UTF8.GetString(buffer, 0, r);

                    ShowMsg(socketSend.RemoteEndPoint.ToString() + ":" + str);

                }

                catch

                { }

            }

        }

        void ShowMsg(string str)

        {

            txtLog.AppendText(str + "\r\n");

        }

        private void Form1_Load(object sender, EventArgs e)

        {

            Control.CheckForIllegalCrossThreadCalls = false;

        }

        /// 服务器给客户端发送消息

        private void btnSend_Click(object sender, EventArgs e)

        {

            byte[] buffer = Encoding.UTF8.GetBytes(txtMsg.Text);

            //获得客户端的ip

            string ip = cboUsers.SelectedItem.ToString();

            List<byte> list = new List<byte>();

            list.Add(0);

            list.AddRange(buffer);

            byte[] newBuffer = list.ToArray();

            dicSocket[ip].Send(newBuffer);

        }

        private void btnSelect_Click(object sender, EventArgs e)

        {

            OpenFileDialog ofd = new OpenFileDialog();

            ofd.Filter = "所有文件|*.*";

            ofd.ShowDialog();

            txtPath.Text = ofd.FileName;

        }

        private void btnSendFile_Click(object sender, EventArgs e)

        {

            string path = txtPath.Text;

            using (FileStream fsRead = new FileStream(path, FileMode.Open, FileAccess.Read))

            {

                byte[] buffer = new byte[1024 * 1024 * 3];

                int r = fsRead.Read(buffer, 0, buffer.Length);

                List<byte> list = new List<byte>();

                list.Add(1);

                list.AddRange(buffer);

                byte[] newBuffer = list.ToArray();

                string ip = cboUsers.SelectedItem.ToString();

                dicSocket[ip].Send(newBuffer, 0, r+1, SocketFlags.None);

            }

        }

        private void btnZD_Click(object sender, EventArgs e)

        {

            byte[] buffer = new byte[1];

            buffer[0] = 2;

            string ip = cboUsers.SelectedItem.ToString();

            dicSocket[ip].Send(buffer);

        }

        private void button1_Click(object sender, EventArgs e)

        {

        }

    }

}

GDI 绘制登录验证码 需要一个pictureBox1控件

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

namespace 使用GDI绘制验证码

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        /// 点击更换验证码

        private void pictureBox1_Click(object sender, EventArgs e)

        {

            Random r = new Random();

            string str = null;

            for (int i = 0; i < 5; i++)

            {

                int rNumber = r.Next(0, 10);

                str += rNumber;

            }

            //  MessageBox.Show(str);

            //创建GDI对象

            Bitmap bmp = new Bitmap(150, 40);

            Graphics g = Graphics.FromImage(bmp);

            for (int i = 0; i < 5; i++)

            {

                Point p = new Point(i * 20, 0);

                string[] fonts = { "微软雅黑", "宋体", "黑体", "隶书", "仿宋" };

                Color[] colors = { Color.Yellow, Color.Blue, Color.Black, Color.Red, Color.Green };

                g.DrawString(str[i].ToString(), new Font(fonts[r.Next(0, 5)], 20, FontStyle.Bold), new SolidBrush(colors[r.Next(0, 5)]), p);

            }

            for (int i = 0; i < 20; i++)

            {

                Point p1=new Point(r.Next(0,bmp.Width),r.Next(0,bmp.Height));

                Point p2=new Point(r.Next(0,bmp.Width),r.Next(0,bmp.Height));

                g.DrawLine(new Pen(Brushes.Green), p1, p2);

            }

            for (int i = 0; i < 500; i++)

            {

                Point p=new Point(r.Next(0,bmp.Width),r.Next(0,bmp.Height));

                bmp.SetPixel(p.X, p.Y, Color.Black);

            }

            //将图片镶嵌到PictureBox中

            pictureBox1.Image = bmp;

        }

        private void Form1_Load(object sender, EventArgs e)

        {

        }

    }

}

GDI 图形绘制：

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

namespace 使用GDI绘制简单的图形

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private void Form1_Load(object sender, EventArgs e)

        {

            //一根笔 颜色  一张纸  两点 绘制直线的对象

        }

        private void button1_Click(object sender, EventArgs e)

        {

            //创建GDI对象

            Graphics g = this.CreateGraphics();// new Graphics();

            //创建画笔对象

            Pen pen = new Pen(Brushes.Red);

            //创建两个点

            Point p1 = new Point(30, 50);

            Point p2 = new Point(250, 250);

            g.DrawLine(pen, p1, p2);

        }

        int i = 0;

        private void Form1_Paint(object sender, PaintEventArgs e)

        {

            i++;

            label1.Text = i.ToString();

            Graphics g = this.CreateGraphics();// new Graphics();

            //创建画笔对象

            Pen pen = new Pen(Brushes.Red);

            //创建两个点

            Point p1 = new Point(30, 50);

            Point p2 = new Point(250, 250);

            g.DrawLine(pen, p1, p2);

        }

        private void button2_Click(object sender, EventArgs e)

        {

            Graphics g = this.CreateGraphics();

            Pen pen=new Pen(Brushes.Yellow);

            Size size=new System.Drawing.Size(80,80);

            Rectangle rec=new Rectangle(new Point(50,50),size);

            g.DrawRectangle(pen,rec);

        }

        private void button3_Click(object sender, EventArgs e)

        {

            Graphics g = this.CreateGraphics();

            Pen pen=new Pen(Brushes.Blue);

            Size size=new System.Drawing.Size(180,180);

            Rectangle rec=new Rectangle(new Point(150,150),size);

            g.DrawPie(pen, rec, 60, 60);

        }

        private void button4_Click(object sender, EventArgs e)

        {

            Graphics g = this.CreateGraphics();

            g.DrawString("百度网盘下载最快", new Font("宋体", 20, FontStyle.Underline), Brushes.Black, new Point(300, 300));

        }

    }

}

窗体传值:

form1.cs 只有一个 label1 和一个button

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

namespace 窗体传值

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private void button1_Click(object sender, EventArgs e)

        {

            Form2 frm2 = new Form2(ShowMsg);

            frm2.Show();

        }

        void ShowMsg(string s)

        {

            label1.Text = s;

        }

    }

}

form2.cs 一个textbox1 和一个button

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows.Forms;

namespace 窗体传值

{

    public delegate void DelStr(string s);

    public partial class Form2 : Form

    {

        public DelStr _del;

        // 子窗口中的del赋值给this._del 父窗体，完成的窗体进程数据传输。

        public Form2(DelStr del)

        {

            this._del = del;

            InitializeComponent();

        }

        private void button1_Click(object sender, EventArgs e)

        {

            // 给父窗体赋值

            _del(textBox1.Text);

        }

    }

}

创建xml

	using System.Xml;

通过代码来创建XML文档

XmlDocument doc = new XmlDocument();

创建第一个行描述信息，并且添加到doc文档中

XmlDeclaration dec = doc.CreateXmlDeclaration("1.0", "utf-8", null);

doc.AppendChild(dec);

创建根节点

XmlElement books = doc.CreateElement("Books");

将根节点添加到文档中

doc.AppendChild(books);

给根节点Books创建子节点

XmlElement book1 = doc.CreateElement("Book");

将book添加到根节点

books.AppendChild(book1);

给Book1添加子节点

XmlElement name1 = doc.CreateElement("Name");

name1.InnerText = "你好";

book1.AppendChild(name1);

写入一个XML

1、创建一个XML文档对象

XmlDocument doc = new XmlDocument();

2、创建第一行描述信息

XmlDeclaration dec = doc.CreateXmlDeclaration("1.0", "utf-8", null);

3、将创建的第一行数据添加到文档中

doc.AppendChild(dec);

4、给文档添加根节点

XmlElement books = doc.CreateElement("Books");

5、将根节点添加给文档对象

doc.AppendChild(books);

6、给根节点添加子节点

XmlElement book1 = doc.CreateElement("Book");

将子节点book1添加到根节点下

books.AppendChild(book1);

7、给book1添加子节点

XmlElement bookName1 = doc.CreateElement("BookName");

8、设置标签中显示的文本

bookName1.InnerText = "水浒传";

book1.AppendChild(bookName1);

XmlElement author1 = doc.CreateElement("Author");

author1.InnerText = "<authorName>匿名</authorName>";

book1.AppendChild(author1);

XmlElement price1 = doc.CreateElement("Price");

price1.InnerXml = "<authorName>匿名</authorName>";

book1.AppendChild(price1);

XmlElement des1 = doc.CreateElement("Des");

des1.InnerXml = "好看";

book1.AppendChild(des1);

Console.WriteLine("保存成功");

doc.Save("Book.xml");

Console.ReadKey();

追加xml

追加XML文档

XmlDocument doc = new XmlDocument();

XmlElement books;

if (File.Exists("Books.xml"))

{

	如果文件存在 加载XML

	doc.Load("Books.xml");

	获得文件的根节点

	books = doc.DocumentElement;

}

else

{

	如果文件不存在

	创建第一行

	XmlDeclaration dec = doc.CreateXmlDeclaration("1.0", "utf-8", null);

	doc.AppendChild(dec);

	创建跟节点

	books = doc.CreateElement("Books");

	doc.AppendChild(books);

}

5、给根节点Books创建子节点

XmlElement book1 = doc.CreateElement("Book");

将book添加到根节点

books.AppendChild(book1);

6、给Book1添加子节点

XmlElement name1 = doc.CreateElement("Name");

name1.InnerText = "c#开发大全";

book1.AppendChild(name1);

XmlElement price1 = doc.CreateElement("Price");

price1.InnerText = "110";

book1.AppendChild(price1);

XmlElement des1 = doc.CreateElement("Des");

des1.InnerText = "看不懂";

book1.AppendChild(des1);

doc.Save("Books.xml");

Console.WriteLine("保存成功");

Console.ReadKey();

读取XML

加载要读取的XML

XmlDocument doc = new XmlDocument();

doc.Load("Books.xml");

获得根节点

XmlElement books = doc.DocumentElement;

获得子节点 返回节点的集合

XmlNodeList xnl = books.ChildNodes;

foreach (XmlNode item in xnl)

{

    Console.WriteLine(item.InnerText);

}

Console.ReadKey();

读取带属性的XML文档

XmlDocument doc = new XmlDocument();

doc.Load("Order.xml");

Xpath

XmlDocument doc = new XmlDocument();

doc.Load("Order.xml");

XmlNodeList xnl = doc.SelectNodes("/Order/Items/OrderItem");

foreach (XmlNode node in xnl)

{

    Console.WriteLine(node.Attributes["Name"].Value);

    Console.WriteLine(node.Attributes["Count"].Value);

}

Console.ReadKey();

改变属性的值

XmlDocument doc = new XmlDocument();

doc.Load("Order.xml");

XmlNode xn = doc.SelectSingleNode("/Order/Items/OrderItem[@Name='190']");

xn.Attributes["Count"].Value = "200";

xn.Attributes["Name"].Value = "颜世伟";

doc.Save("Order.xml");

Console.WriteLine("保存成功");

XmlDocument doc = new XmlDocument();

doc.Load("Order.xml");

XmlNode xn = doc.SelectSingleNode("/Order/Items");

xn.RemoveAll();

doc.Save("Order.xml");

Console.WriteLine("删除成功");

Console.ReadKey();

获得文档的根节点

  xmlelement order = doc.documentelement;

  xmlnodelist xnl = order.childnodes;

  foreach (xmlnode item in xnl)

  {

      如果不是items 就continue

      if (item[])

      {

          continue;

      }

      console.writeline(item.attributes["name"].value);

      console.writeline(item.attributes["count"].value);

  }

Console.ReadKey();

增删改查:

XMLDocument

#region 对xml文档实现追加的需求

XmlDocument doc = new XmlDocument();

首先判断xml文档是否存在 如果存在 则追加  否则创建一个

if (File.Exists("Student.xml"))

{

    加载进来

    doc.Load("Student.xml");

    追加

    获得根节点 给根节点添加子节点

    XmlElement person = doc.DocumentElement;

    XmlElement student = doc.CreateElement("Student");

    student.SetAttribute("studentID", "10");

    person.AppendChild(student);

    XmlElement name = doc.CreateElement("Name");

    name.InnerXml = "我是新来哒";

    student.AppendChild(name);

    XmlElement age = doc.CreateElement("Age");

    age.InnerXml = "18";

    student.AppendChild(age);

    XmlElement gender = doc.CreateElement("Gender");

    gender.InnerXml = "女";

    student.AppendChild(gender);

}

else

{

    不存在

    XmlDeclaration dec = doc.CreateXmlDeclaration("1.0", "utf-8", null);

    doc.AppendChild(dec);

    XmlElement person = doc.CreateElement("Person");

    doc.AppendChild(person);

    XmlElement student = doc.CreateElement("Student");

    student.SetAttribute("studentID", "110");

    person.AppendChild(student);

    XmlElement name = doc.CreateElement("Name");

    name.InnerXml = "张三三李思思";

    student.AppendChild(name);

    XmlElement age = doc.CreateElement("Age");

    age.InnerXml = "28";

    student.AppendChild(age);

    XmlElement gender = doc.CreateElement("Gender");

    gender.InnerXml = "男";

    student.AppendChild(gender);

}

doc.Save("Student.xml");

Console.WriteLine("保存成功");

#endregion

#region 读取XML文档

XmlDocument doc = new XmlDocument();

doc.Load("OrDER.xml");

还是 先获得根节点

XmlElement order = doc.DocumentElement;

获得根节点下面的所有子节点

XmlNodeList xnl = order.ChildNodes;

foreach (XmlNode item in xnl)

{

    Console.WriteLine(item.InnerText);

}

XmlElement items = order["Items"];

XmlNodeList xnl2 = items.ChildNodes;

foreach (XmlNode item in xnl2)

{

    Console.WriteLine(item.Attributes["Name"].Value);

    Console.WriteLine(item.Attributes["Count"].Value);

    if (item.Attributes["Name"].Value == "手套")

    {

        item.Attributes["Count"].Value = "新来哒";

    }

}

doc.Save("OrDER.xml");

#endregion

#region 使用XPath的方式来读取XML文件

XmlDocument doc = new XmlDocument();

doc.Load("order.xml");

获得根节点

XmlElement order = doc.DocumentElement;

XmlNode xn = order.SelectSingleNode("/Order/Items/OrderItem[@Name='雨衣']");

Console.WriteLine(xn.Attributes["Name"].Value);

xn.Attributes["Count"].Value = "woshi new";

doc.Save("order.xml");

Console.WriteLine("保存成功");

#endregion

XmlDocument doc = new XmlDocument();

doc.Load("order.xml");

doc.RemoveAll();不行 根节点不允许删除

XmlElement order = doc.DocumentElement;

order.RemoveAll();移除根节点下的所有子节点

 XmlNode xn = order.SelectSingleNode("/Order/Items/OrderItem[@Name='雨衣']");

 让orderItem去删除属性

 XmlNode orderItem = order.SelectSingleNode("/Order/Items/OrderItem");

 获得Items节点

 XmlNode items = order["Items"];order.SelectSingleNode("/Order/Items");

 items.RemoveChild(xn);移除当前节点

 orderItem.RemoveAttributeNode(xn.Attributes["Count"]);

 xn.Attributes.RemoveNamedItem("Count");

 doc.Save("order.xml");

 Console.WriteLine("删除成功");

 Console.ReadKey();

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