当初为了课程设计，自己写的DataGrid的几个功能，费了好多时间弄懂的。
现在贴出来
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using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
using System.Data.OleDb;
namespace WebApplication1
{
/// <summary>
/// WebForm1 的摘要说明。
/// </summary>
public class WebForm1 : System.Web.UI.Page
{
protected System.Web.UI.WebControls.Label Label2;
protected System.Web.UI.WebControls.Label Label3;
protected System.Web.UI.WebControls.TextBox TextBox2;
protected System.Web.UI.WebControls.TextBox TextBox3;
protected System.Web.UI.WebControls.TextBox TextBox4;
protected System.Web.UI.WebControls.TextBox TextBox5;
protected System.Web.UI.WebControls.Label Label5;
protected System.Web.UI.WebControls.Label Label6;
protected System.Web.UI.WebControls.Label Label7;
protected System.Web.UI.WebControls.Label Label8;
protected System.Web.UI.WebControls.Button Button2;
protected System.Web.UI.WebControls.Label Label9;
protected System.Web.UI.WebControls.TextBox TextBox6;
protected System.Web.UI.WebControls.Label Label10;
protected System.Web.UI.WebControls.DataGrid DataGrid1;
protected System.Web.UI.WebControls.Button Button3;
protected System.Web.UI.WebControls.Label Label11;
protected System.Web.UI.WebControls.Label Label12;
protected System.Web.UI.WebControls.Label Label13;
protected System.Web.UI.WebControls.Label Label14;
protected System.Web.UI.WebControls.Button Button5;
protected System.Web.UI.WebControls.Button Button6;
protected System.Web.UI.WebControls.Label Label15;
protected System.Web.UI.WebControls.Label Label1;
SqlConnection conn=new SqlConnection("data source=fish_in_sky;database=stu_info;uid=sa;pwd=");
SqlCommand myCommand=new SqlCommand();
private void Page_Load(object sender, System.EventArgs e)
{
// 在此处放置用户代码以初始化页面
}
private void DataGridBind()
{
if(this.TextBox6.Text.Length==6||this.TextBox6.Text.Length==0)
{
conn.Open();
SqlDataAdapter myAdapter=new SqlDataAdapter();
if(this.TextBox6.Text.Length==0)
myAdapter.SelectCommand=new SqlCommand("select * from info",conn);
else
myAdapter.SelectCommand=new SqlCommand("select * from info where 学号="+"'"+this.TextBox6.Text+"'",conn);
DataSet ds=new DataSet();
myAdapter.Fill(ds,"Categories");
DataGrid1.DataSource=ds;
DataGrid1.DataBind();
conn.Close();
}
else
{
Response.Write("<script>alert('学号错误！');</script>");
}
}
#region Web 窗体设计器生成的代码
override protected void OnInit(EventArgs e)
{
//
// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
//
InitializeComponent();
base.OnInit(e);
}
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.Button2.Click += new System.EventHandler(this.Button2_Click);
this.Button3.Click += new System.EventHandler(this.Button3_Click);
this.DataGrid1.ItemCreated += new System.Web.UI.WebControls.DataGridItemEventHandler(this.DataGrid1_ItemCreated);
this.DataGrid1.ItemCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.DataGrid1_EditCommand);
this.DataGrid1.Init += new System.EventHandler(this.Page_Load);
this.DataGrid1.PageIndexChanged += new System.Web.UI.WebControls.DataGridPageChangedEventHandler(this.DataGrid1_PageIndexChanged);
this.DataGrid1.CancelCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.DataGrid1_CancelCommand);
this.DataGrid1.EditCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.DataGrid1_EditCommand);
this.DataGrid1.UpdateCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.DataGrid1_UpdateCommand);
this.DataGrid1.DeleteCommand += new System.Web.UI.WebControls.DataGridCommandEventHandler(this.DataGrid1_DeleteCommand);
this.Button5.Click += new System.EventHandler(this.Button5_Click);
this.Button6.Click += new System.EventHandler(this.Button6_Click);
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
//"添加"按钮
private void Button2_Click(object sender, System.EventArgs e)
{
if(this.TextBox2.Text.Length!=6) Response.Write("<script>alert('请输入学号！');</script>");
else
{
if(this.TextBox3.Text.Length==0) Response.Write("<script>alert('请输入姓名！');</script>");
else
{
if(this.TextBox4.Text.Length==0) Response.Write("<script>alert('请输入专业名！');</script>");
else
{
if(this.TextBox5.Text.Length==0) Response.Write("<script>alert('请输入学分！');</script>");
else
{
myCommand.CommandText="Insert into info values('"+Convert.ToString(this.TextBox2.Text)+"','"+Convert.ToString(this.TextBox3.Text)+"','"+Convert.ToString(this.TextBox4.Text)+"','"+Convert.ToString(this.TextBox5.Text)+"')";
myCommand.Connection =conn;
conn.Open();
myCommand.ExecuteNonQuery();
Response.Write("<script>alert('数据添加成功！');</script>");
conn.Close();
DataBind();
clear_add_text();
}
}
}
}
}
//查询
private void Button3_Click(object sender, System.EventArgs e)
{
DataGridBind();
}
private void DataGrid1_PageIndexChanged(object source, System.Web.UI.WebControls.DataGridPageChangedEventArgs e)
{
DataGrid1.CurrentPageIndex=e.NewPageIndex;
DataGridBind();
}
//重置添加数据框
private void Button5_Click(object sender, System.EventArgs e)
{
clear_add_text();
}
private void clear_add_text()
{
this.TextBox2.Text="";
this.TextBox3.Text="";
this.TextBox4.Text="";
this.TextBox5.Text="";
}
//重置查询数据框
private void Button6_Click(object sender, System.EventArgs e)
{
this.TextBox6.Text="";
}
//删除记录确认框
private void DataGrid1_ItemCreated(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
{
LinkButton myDeleteButton;
switch(e.Item.ItemType)
{
case ListItemType.Item:
case ListItemType.AlternatingItem:
myDeleteButton = (LinkButton) e.Item.Cells[0].Controls[0];
myDeleteButton.Attributes.Add("onclick", @"return confirm('记录将会被删除,你确认要删除吗?');");
break;
}
}
//删除记录
private void DataGrid1_DeleteCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
{
string key=(DataGrid1.DataKeys[(int)e.Item.ItemIndex]).ToString();
myCommand.CommandText="DELETE FROM info WHERE (学号 = "+"'"+key+"'"+")";
myCommand.Connection =conn;
conn.Open();
myCommand.ExecuteNonQuery();
Response.Write("<script>alert('成功删除数据！');</script>");
conn.Close();
if(DataGrid1.CurrentPageIndex-1>1)
{
DataGrid1.CurrentPageIndex = DataGrid1.CurrentPageIndex-1;
}
else
{
DataGrid1.CurrentPageIndex = 0;
}
DataGrid1.EditItemIndex=-1;
DataGridBind();
}
//编辑功能
private void DataGrid1_EditCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
{
DataGrid1.EditItemIndex = e.Item.ItemIndex;
DataGridBind();
}
//更新数据
private void DataGrid1_UpdateCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
{
string key=(DataGrid1.DataKeys[(int)e.Item.ItemIndex]).ToString();
TextBox txt_f2=(TextBox)e.Item.Cells[3].Controls[0];//姓名
TextBox txt_f3=(TextBox)e.Item.Cells[4].Controls[0];//专业名
TextBox txt_f4=(TextBox)e.Item.Cells[5].Controls[0];//总学分
myCommand.CommandText="update info set 姓名="+"'"+txt_f2.Text+"'"+",专业名="+"'"+txt_f3.Text+"'"+",总学分="+"'"+txt_f4.Text+"'"+" where 学号="+"'"+key+"'";
myCommand.Connection =conn;
conn.Open();
myCommand.ExecuteNonQuery();
conn.Close();
Response.Write("<script>alert('数据修改成功！');</script>");
DataGrid1.EditItemIndex=-1;
DataGridBind();
}
//DG取消
private void DataGrid1_CancelCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
{
DataGrid1.EditItemIndex=-1;
DataGridBind();
}
}
}