C# ASP.net 入门之简单通讯录

简单通讯录功能虽然简单，却包括了制作一个网站的基本功能！各个模块可以作为新手入门的参考。

简单通讯录实现功能：1.登录 2.注册 3.后台管理 4.前台登录显示 5.创建联系人 6.密码修改

代码下载：http://download.csdn.net/detail/wyz365889/5773253

实现功能效果图如下：

主要代码实现如下：

1.底层数据模块

using System;

using System.Data;

using System.Configuration;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

using System.Data.SqlClient;

using System.Data;

/// <summary>

/// DBManage 的摘要说明

/// </summary>

public class DBManage

{

	public DBManage()

	{

		//

		// TODO: 在此处添加构造函数逻辑

		//

	}

    string strConn = @"Data Source=WYZ-PC\SQL2005;Integrated Security=SSPI;Initial Catalog=addressBook;";

    public SqlConnection conn;

    public void sqlConn()   //连接数据库

    {

        try

        {

            conn = new SqlConnection(strConn);

            conn.Open();

        }

        catch

        {

            return;

        }

    }

    //读取语句执行结果

    public SqlDataReader readResult(string strSql)

    {

        try

        {

            SqlCommand sqlComd = new SqlCommand(strSql, conn);

            return sqlComd.ExecuteReader();

        }

        catch

        {

            throw;

        }

    }

    //读取数据到操作表中

    public bool readData(string strSql, out DataTable dt)

    {

        dt = new DataTable();

        try

        {

            SqlDataAdapter sda = new SqlDataAdapter(strSql, conn);

            sda.Fill(dt);

            return true;

        }

        catch (Exception e)

        {

            return false;

        }

    }

    //执行插入，更新语句

    public bool execSql(string strSql)

    {

        SqlCommand sc = new SqlCommand(strSql, conn);

        try

        {

            sc.ExecuteNonQuery();

            return true;

        }

        catch (Exception e)

        {

            return false;

        }

    }

    //查询是否存在数据

    public bool isExistData(string strSql)

    {

        bool flag = false;

        try

        {

            using (SqlCommand sc = new SqlCommand())

            {

                sc.CommandText = strSql;

                sc.Connection = conn;

                SqlDataReader sr = sc.ExecuteReader();

                if (sr.HasRows)

                {

                    flag = true;

                }

                sr.Close();

            }

        }

        catch (Exception e)

        {

            flag = false;

        }

        return flag;

    }

    public void closeDB()

    {

        conn.Close();

        conn.Dispose();

    }

}

2.登录代码

using System;

using System.Data;

using System.Configuration;

using System.Collections;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

using System.Data.SqlClient;

public partial class login : System.Web.UI.Page

{

    protected void Page_Load(object sender, EventArgs e)

    {

    }

    protected void Button_Login_Click(object sender, EventArgs e)

    {

        DBManage db = new DBManage();

        db.sqlConn();   //数据库连接

        string strUserID = TextBox1_userID.Text.Trim();

        string strPwd = TextBox2_pwd.Text.Trim();

        if (strUserID == "" || strPwd == "")

        {

            Label1_meg.Text = "提示：用户名或者密码不能为空！";

        }

        else

        {

            string strSql = @"select * from tb_user";

            if (!db.isExistData(strSql))    //不存在用户，添加默认用户

            {

                db.execSql(@"insert into tb_user values('admin','admin','admin','管理员')");

            }

            string strSql2 = "select * from tb_user where userID='" + strUserID + "' and pwd='" + strPwd + "'";

            if (db.isExistData(strSql2))

            {

                SqlDataReader sqlRead = db.readResult(strSql2);

                sqlRead.Read();

                string strRole = sqlRead[3].ToString();

                sqlRead.Close();

                db.closeDB();   //关闭数据库

                if (strRole.Trim().Equals("管理员"))     //管理员权限

                {

                    Response.Redirect("admin.aspx?userID=" + strUserID);

                }

                else if (strRole.Trim() == "普通用户")    //普通用户权限

                {

                    Response.Redirect("userInfo.aspx?userID=" + strUserID);

                }

            }

            else

            {

                Label1_meg.Text = "提示：密码或帐号不正确,请重新输入！";

                TextBox1_userID.Text = "";

                TextBox2_pwd.Text = "";

            }

        }

    }

}

3.注册代码

using System;

using System.Data;

using System.Configuration;

using System.Collections;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

public partial class register : System.Web.UI.Page

{

    protected void Page_Load(object sender, EventArgs e)

    {

    }

    DBManage db;

    protected void Button_reg_Click(object sender, EventArgs e)

    {

        db = new DBManage();

        db.sqlConn();

        string strUserID = TextBox1_userID.Text.Trim();

        string strName = TextBox2_name.Text.Trim();

        string strPwd = TextBox4_pwd1.Text.Trim();

        string strPwd2 = TextBox1_pwd2.Text.Trim();

        string strRole = "普通用户";

        string strSql2 = "insert into tb_user values('" + strUserID + "','" + strName + "','" + strPwd + "','" + strRole + "')";

        if (db.execSql(strSql2))

        {

            Response.Write("<script>alert('注册成功!');window.location.href ='login.aspx'</script>");

            return;

        }

    }

}

4.后台管理代码

using System;

using System.Data;

using System.Configuration;

using System.Collections;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

using System.Data.SqlClient;

public partial class admin : System.Web.UI.Page

{

    DBManage db;

    string strUserID;

    protected void Page_Load(object sender, EventArgs e)

    {

        if (!Page.IsPostBack)

        {

            MyBind("select * from tb_user");

            strUserID = Request.QueryString["userID"].ToString();

            HyperLink1_pwd.NavigateUrl = "~/pwd.aspx?userID=" + strUserID;

        }  

    }

    void MyBind(String strSql)

    {

        db = new DBManage();

        db.sqlConn();

        SqlDataAdapter da = new SqlDataAdapter(strSql, db.conn);

        DataSet ds = new DataSet();

        da.Fill(ds);

        GridView1.DataSource = ds;

        GridView1.DataBind();

    }  

    protected void Button1_Click(object sender, EventArgs e)

    {

        string strKey = TextBox1_key.Text.Trim();

        string strID = "";

        if (DropDownList1_select.Text == "用户名")

        {

            strID = "userID";

        }

        if (DropDownList1_select.Text == "姓名")

        {

            strID = "userName";

        }

        if (DropDownList1_select.Text == "权限")

        {

            strID = "role";

        }

        String strSql = "select * from tb_user where " + strID + " like '" + strKey + "%'";

        MyBind(strSql);  

    }

    protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)

    {

        db = new DBManage();

        db.sqlConn();

        string sql = "delete from tb_user where userID='" + GridView1.DataKeys[e.RowIndex].Value.ToString() + "'";

        SqlCommand cmd = new SqlCommand(sql, db.conn);

        cmd.ExecuteNonQuery();

        db.closeDB();

        MyBind("select * from tb_user");//调用MyBind()子程序

    }

}

5.前台登录显示

using System;

using System.Data;

using System.Configuration;

using System.Collections;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

using System.Data.SqlClient;

public partial class userInfo : System.Web.UI.Page

{

    DBManage db;

    string strUserID="";

    protected void Page_Load(object sender, EventArgs e)

    {

        if (!Page.IsPostBack)

        {

            MyBind("select * from tb_info");

            strUserID = Request.QueryString["userID"].ToString();

            HyperLink1_pwd.NavigateUrl = "~/pwd.aspx?userID=" + strUserID;

            HyperLink1_new.NavigateUrl = "~/newInfo.aspx?userID=" + strUserID;

        }

    }

    void MyBind(String strSql)

    {

        db = new DBManage();

        db.sqlConn();

        SqlDataAdapter da = new SqlDataAdapter(strSql, db.conn);

        DataSet ds = new DataSet();

        da.Fill(ds);

        GridView1.DataSource = ds.Tables[0].DefaultView;

        GridView1.DataBind();

    }

    protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)

    {

        string sql = "delete from tb_info where num=" + GridView1.DataKeys[e.RowIndex].Values[0].ToString() + " and userID='"

            + GridView1.DataKeys[e.RowIndex].Values[1].ToString() + "'";

        db = new DBManage();

        db.sqlConn();

        SqlCommand cmd = new SqlCommand(sql, db.conn);

        //执行删除操作   

        cmd.ExecuteNonQuery();

        db.closeDB();

        MyBind("select * from tb_info");//调用MyBind()子程序

    }

    protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)

    {

        GridView1.EditIndex = e.NewEditIndex;

        String strSql = "select * from tb_info where num=" + GridView1.DataKeys[e.NewEditIndex].Values[0].ToString()+" and userID='"

            +GridView1.DataKeys[e.NewEditIndex].Values[1].ToString()+"'";

        MyBind(strSql);  

    }

    protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)

    {

        GridView1.EditIndex = -1;

        MyBind("select * from tb_info");  

    }

    protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)

    {

        db = new DBManage();

        db.sqlConn();

        TextBox name, sex, phone, qq,birthday, remark;

        name = (TextBox)GridView1.Rows[e.RowIndex].Cells[0].Controls[0];

        sex = (TextBox)GridView1.Rows[e.RowIndex].Cells[1].Controls[0];

        phone = (TextBox)GridView1.Rows[e.RowIndex].Cells[2].Controls[0];

        qq = (TextBox)GridView1.Rows[e.RowIndex].Cells[3].Controls[0];

        birthday = (TextBox)GridView1.Rows[e.RowIndex].Cells[4].Controls[0];

        remark = (TextBox)GridView1.Rows[e.RowIndex].Cells[5].Controls[0];

        String strSql = "update tb_info set name='" + name.Text + "',sex='" + sex.Text +

            "',phone='" + phone.Text + "',qq='" + qq.Text + "',birthday=" + birthday.Text.Substring(0,9)+ ",remark='" +

            remark.Text + "' where num=" + GridView1.DataKeys[e.RowIndex].Values[0].ToString() + " and userID='"

            + GridView1.DataKeys[e.RowIndex].Values[1].ToString() + "'";

        db.execSql(strSql);

        GridView1.EditIndex = -1;

        MyBind("select * from tb_info");//调用MyBind()子程序

    }

    protected void Button1_Click(object sender, EventArgs e)

    {

        string strKey = TextBox2.Text.Trim();

        String strSql = "select * from tb_info where name like '" + strKey + "%' or phone like '" + strKey

            +"%' or qq like '" + strKey + "%'";

        MyBind(strSql);

    }

}

6.密码修改

using System;

using System.Data;

using System.Configuration;

using System.Collections;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

public partial class pwd : System.Web.UI.Page

{

    string strUserID;

    DBManage db;

    protected void Page_Load(object sender, EventArgs e)

    {

        if (!IsPostBack)

        {

            strUserID = Request.QueryString["userID"].ToString();

            TextBox1_userID.Text = strUserID;

            TextBox1_userID.Enabled = false;

        }

    }

    protected void  Button_pwd_Click(object sender, EventArgs e)

    {

        db = new DBManage();

        db.sqlConn();

        string strNewPwd = TextBox4_pwd1.Text.Trim();

        string strRPwd = TextBox1_pwd2.Text.Trim();

        string strSql = "select * from tb_user where userID='" + TextBox1_userID.Text.ToString() + "'";

        Label1.Text = TextBox1_userID.Text + db.isExistData(strSql).ToString() + strNewPwd.Equals(strRPwd).ToString();

        if (db.isExistData(strSql))

        {

            if (strNewPwd.Equals(strRPwd))

            {

                string strSql2 = "update tb_user set pwd='" + strNewPwd + "' where userID='" + TextBox1_userID.Text.ToString() + "'";

                if (db.execSql(strSql2))

                {

                    Label1.Text = "密码修改成功！";

                }

            }

            else

            {

                 Label1.Text = "两遍输入密码不一样！";

            }

        }

        db.closeDB();

    }

}

7.创建联系人

using System;

using System.Data;

using System.Configuration;

using System.Collections;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

using System.Data.SqlClient;

public partial class newInfo : System.Web.UI.Page

{

    DBManage db;

    string strUserID;

    protected void Page_Load(object sender, EventArgs e)

    {

        if (!IsPostBack)

        {

            TextBox1_birthday.Enabled = false;

            strUserID = Request.QueryString["userID"].ToString();

            HyperLink1_back.NavigateUrl = "~/userInfo.aspx?userID=" + strUserID;

        }

        else

        {

            strUserID = Request.QueryString["userID"].ToString();

        }

    }

    protected void Calendar1_SelectionChanged(object sender, EventArgs e)

    {

        TextBox1_birthday.Text = Calendar1.SelectedDate.ToString("yyyy-MM-dd");

    }

    protected void Button_reg_Click(object sender, EventArgs e)

    {

        db = new DBManage();

        db.sqlConn();

        string strName = TextBox2_name.Text.Trim();

        string strPhone = TextBox4_phone.Text.Trim();

        string strQQ = TextBox1_qq.Text.Trim();

        string strRemark = TextBox3_remark.Text;

        string strSex = "";

        if (RadioButton1.Checked)

        {

            strSex = "男";

        }

        if (RadioButton2.Checked)

        {

            strSex = "女";

        }

        string strBir = TextBox1_birthday.Text;

        string strSql = "select * from tb_info where name='" + strName + "' or phone='"+ strPhone + "'";

        if (db.isExistData(strSql))

        {

            Label1.Text = "该信息已存在!";

            return;

        }

        string strSql2 = "insert into tb_info values('"+ strUserID +"','"+ strName + "','" + strSex + "','"

            + strPhone + "','" + strQQ + "','" + strBir + "','" + strRemark + "')";

        Label1.Text = strSql2;

        if (db.execSql(strSql2))

        {

            Label1.Text = "新建联系人成功!";

            return;

        }

    }

}

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