如何在DataGrid中进行添加、删除和修改操作

见于好多人在CSDN上问如何在DataGrid中进行添加、删除和修改操作，我最近作了如下一个例子。

首先，例子所用的数据库是SQL Server2000，数据库表格如下：

字段名	类型	备注
EmployeeID	Int	自增字段
EmployeeName	Varchar(20)
Salary	Int
CellPhone	Varchar(20)
EmailAddress	Varchar(20)

程序的代码如下：

//------------------------Datagrid Demo------------------------------------

//-------------------------------------------------------------------------

//---File:frmDataGridDemo.cs

//---Description:The main form file to operate datagrid

//---Author:Knight

//---Date:Mar.17, 2006

//-------------------------------------------------------------------------

//----------------------{ Datagrid Demo }----------------------------------

using System;

using System.Drawing;

using System.Collections;

using System.ComponentModel;

using System.Windows.Forms;

using System.Data;

using System.Data.SqlClient;

namespace CSDataGrid

{

/// <summary>

/// Summary description for frmDataGridDemo.

/// </summary>

public class frmDataGridDemo : System.Windows.Forms.Form

{

private System.Windows.Forms.DataGrid dtgUserInfo;

private System.Windows.Forms.Button btnUpdate;

private System.Windows.Forms.Button btnExit;

protected SqlConnection sqlConn = new SqlConnection();

protected SqlDataAdapter sqlDAdapter = null;

protected DataSet sqlRecordSet = null;

/// <summary>

/// Required designer variable.

/// </summary>

private System.ComponentModel.Container components = null;

public frmDataGridDemo()

{

// Required for Windows Form Designer support

InitializeComponent();

// TODO: Add any constructor code after InitializeComponent call

}

/// <summary>

/// Clean up any resources being used.

/// </summary>

protected override void Dispose( bool disposing )

{

if( disposing )

{

if (components != null)

{

components.Dispose();

}

base.Dispose( disposing );

}

#region Windows Form Designer generated code

/// <summary>

/// Required method for Designer support - do not modify

/// the contents of this method with the code editor.

/// </summary>

private void InitializeComponent()

{

this.dtgUserInfo = new System.Windows.Forms.DataGrid();

this.btnUpdate = new System.Windows.Forms.Button();

this.btnExit = new System.Windows.Forms.Button();

((System.ComponentModel.ISupportInitialize)(this.dtgUserInfo)).BeginInit();

this.SuspendLayout();

// dtgUserInfo

this.dtgUserInfo.DataMember = "";

this.dtgUserInfo.HeaderForeColor = System.Drawing.SystemColors.ControlText;

this.dtgUserInfo.Location = new System.Drawing.Point(8, 16);

this.dtgUserInfo.Name = "dtgUserInfo";

this.dtgUserInfo.Size = new System.Drawing.Size(528, 480);

this.dtgUserInfo.TabIndex = 0;

// btnUpdate

this.btnUpdate.Location = new System.Drawing.Point(544, 16);

this.btnUpdate.Name = "btnUpdate";

this.btnUpdate.TabIndex = 1;

this.btnUpdate.Text = "&Update";

this.btnUpdate.Click += new System.EventHandler(this.btnUpdate_Click);

// btnExit

this.btnExit.Location = new System.Drawing.Point(544, 472);

this.btnExit.Name = "btnExit";

this.btnExit.TabIndex = 2;

this.btnExit.Text = "E&xit";

// frmDataGridDemo

this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);

this.ClientSize = new System.Drawing.Size(634, 511);

this.Controls.Add(this.btnExit);

this.Controls.Add(this.btnUpdate);

this.Controls.Add(this.dtgUserInfo);

this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;

this.MaximizeBox = false;

this.Name = "frmDataGridDemo";

this.Text = "DataGrid Demo";

this.Load += new System.EventHandler(this.frmDataGridDemo_Load);

((System.ComponentModel.ISupportInitialize)(this.dtgUserInfo)).EndInit();

this.ResumeLayout(false);

}

#endregion

/// <summary>

/// The main entry point for the application.

/// </summary>

[STAThread]

static void Main()

{

Application.Run(new frmDataGridDemo());

}

private void frmDataGridDemo_Load(object sender, System.EventArgs e)

{

//Set connection string

sqlConn.ConnectionString = yourDBConnectionString;

//Connect to DB

if( ConnectDB() )

{

//Bind data to datagrid

BindData();

}

private void AddDGStyle()

{

DataGridTableStyle ts1 = new DataGridTableStyle();

//specify the table from dataset (required step)

ts1.MappingName = "EmployeeInfo";

PropertyDescriptorCollection pdc = this.BindingContext

[sqlRecordSet, "EmployeeInfo"].GetItemProperties();

DataGridColumnStyle TextCol = new DataGridTextBoxColumn( pdc["EmployeeID"], "i" );

TextCol.MappingName = "EmployeeID";

TextCol.HeaderText = "EmployeeID";

TextCol.Width = 0;

TextCol.ReadOnly = true;