强类型DataSet (2011-12-30 23:16:59)转载▼ 标签： 杂谈 分类： Asp.Net练习笔记 http://blog.sina.com.cn/s/blog_9d90c4140101214w.html

强类型DataSet

(2011-12-30 23:16:59)

转载▼

标签： 杂谈

分类： Asp.Net练习笔记

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using DataSet.DataSet1TableAdapters;

using System.Diagnostics;

 

namespace DataSet

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

 

        private void button1_Click(object sender, EventArgs e)

        {

            T_UsersTableAdapter adapter = new T_UsersTableAdapter();

            DataSet1.T_UsersDataTable data = adapter.GetData();

            for (int i = 0; i < data.Count; i++)

            {

                DataSet1.T_UsersRow userrow = data[i];

                if (userrow.IsUserNameNull() )

                {

                    MessageBox.Show("NULL");

                }

                else

                {

                    MessageBox.Show(userrow.UserName + userrow.UserPassWord);

                }

                

            }

 

            data[0].UserName = "luozixuan";

            adapter.Update(data);

            adapter.Insert("lineage", "lineage", 0);

            //表结构必须设置主键才可以使用update，delete

            for (int i = 0; i < data.Count; i++)

            {

                DataSet1.T_UsersRow userrow = data[i];

                MessageBox.Show(userrow.UserName + userrow.UserPassWord);

            }

        }

 

        private void Login_Click(object sender, EventArgs e)

        {

            T_UsersTableAdapter adapter = new T_UsersTableAdapter();

            DataSet.DataSet1.T_UsersDataTable datatable = adapter.GetDataByID(this.txtusername.Text);

            if (datatable.Count < 0)

            {

                MessageBox.Show("用户名错误");

            }

            else

            {

                DataSet.DataSet1.T_UsersRow datarow = datatable[0];

                if (datarow.ErrorTimes > 3)

                {

                    MessageBox.Show("登陆错误次数过多，账号被锁定，无法登陆！");

                    return;

                }

                if (datarow.UserPassWord == this.txtpassword.Text)

                {

                    MessageBox.Show("登陆成功！");

                    adapter.ReSetErrorTimes(datarow.Id);

                }

                else

                {

                    MessageBox.Show("密码错误");

                    adapter.AddErrorTimes(datarow.Id);

                }

            }

        }

        //强类型dataset批量更新数据时的连接处理方式

        private void button2_Click(object sender, EventArgs e)

        {

            Stopwatch sw = new Stopwatch();

            sw.Start();

            T_UsersTableAdapter adapter = new T_UsersTableAdapter();

            for (int i = 0; i < 1000; i++)

            {

                adapter.Insert(i.ToString(), i.ToString(), 0);

            }

                sw.Stop();

                MessageBox.Show(sw.Elapsed.ToString());

        }

 

        private void button3_Click(object sender, EventArgs e)

        {

            Stopwatch sw = new Stopwatch();

            sw.Start();

            T_UsersTableAdapter adapter = new T_UsersTableAdapter();

            adapter.Connection.Open();

            for (int i = 0; i < 1000; i++)

            {

                adapter.Insert(i.ToString(), i.ToString(), 0);

            }

            adapter.Connection.Close();

            sw.Stop();

            MessageBox.Show(sw.Elapsed.ToString());

        }

    }

}