ASP.NET(C#)GridView(編集、削除、更新、キャンセル)

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GridView AS.NET（C〓〓）編集、削除、更新、キャンセル

フロントコード

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default5.aspx.cs" Inherits="Default5" %>
 
 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 
 <html xmlns="http://www.w3.org/1999/xhtml">
 <head runat="server">
     <title></title>
 </head>
 <body>
     <form id="form1" runat="server">
     <div>
     
         <asp:GridView ID="GridView1" runat="server" AutoGenerateDeleteButton="True" 
             AutoGenerateEditButton="True" DataKeyNames="id" 
             onrowdeleting="GridView1_RowDeleting" onrowediting="GridView1_RowEditing" 
             onrowupdating="GridView1_RowUpdating" 
             onrowcancelingedit="GridView1_RowCancelingEdit" >
         </asp:GridView>
     
     </div>
     </form>
 </body>
 </html>

バックグラウンドコード

using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Web;
 using System.Web.UI;
 using System.Web.UI.WebControls;
 using System.Data.SqlClient;
 using System.Data;
 
 public partial class Default5 : System.Web.UI.Page
 {
     private void BindData()
     {
         String Strcon = "Data Source=.;Initial Catalog=testDB;Integrated Security=True";
         SqlConnection con = new SqlConnection(Strcon);
         String sql = "select userinfo.id,username,password,birthday from userinfo";
         SqlDataAdapter ad = new SqlDataAdapter(sql, con);
         DataSet ds = new DataSet();
         ad.Fill(ds);
         GridView1.DataSource = ds;
         GridView1.DataBind();
     }
 
     protected void Page_Load(object sender, EventArgs e)
     {
         if (!IsPostBack)  /*      ，            ，          */
         {
             BindData();
         }
     }
     protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
     {
         String Strcon = "Data Source=.;Initial Catalog=testDB;Integrated Security=True";
         SqlConnection con = new SqlConnection(Strcon);
         int id = Convert.ToInt32(GridView1.DataKeys[e.RowIndex].Value);/*    ，     DataKeyNames，     id */
         String sql = "delete from userinfo where id='" + id+"'";
         
         SqlCommand com = new SqlCommand(sql, con);
         con.Open();
         com.ExecuteNonQuery();
         con.Close();
         BindData();
 
     }
 
     /*    ，  e.NewEditIndex         */
     protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
     {
         GridView1.EditIndex = e.NewEditIndex;
         BindData();              /*             ,       2           */
     }
     protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
     {
         String Strcon = "Data Source=.;Initial Catalog=testDB;Integrated Security=True";
         SqlConnection con = new SqlConnection(Strcon);
         String username = (GridView1.Rows[e.RowIndex].Cells[2].Controls[0] as TextBox).Text.ToString();    /*        */
         String password = (GridView1.Rows[e.RowIndex].Cells[3].Controls[0] as TextBox).Text.ToString();
         String birthday = (GridView1.Rows[e.RowIndex].Cells[4].Controls[0] as TextBox).Text.ToString();
 
         int id = Convert.ToInt32(GridView1.DataKeys[e.RowIndex].Value);/*    ，     DataKeyNames，     id */
 
         String sql = "update userinfo set username='" + username + "',password='"+password+"',birthday='"+birthday+"' where id='"+id+"'";
 
         SqlCommand com = new SqlCommand(sql, con);
         con.Open();
         com.ExecuteNonQuery();
         con.Close();
         GridView1.EditIndex = -1;
         BindData();
     }
     protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
     {
         GridView1.EditIndex = -1;                 /*       -1，        */
         BindData();
     }
 }

SQLスクリプト(SQL Server)

USE [testDB]
 GO
 
 /****** Object:  Table [dbo].[userinfo]    Script Date: 12/02/2012 22:20:46 ******/
 SET ANSI_NULLS ON
 GO
 
 SET QUOTED_IDENTIFIER ON
 GO
 
 SET ANSI_PADDING ON
 GO
 
 CREATE TABLE [dbo].[userinfo](
 	[id] [int] IDENTITY(1,1) NOT NULL,
 	[username] [varchar](50) NULL,
 	[password] [varchar](50) NULL,
 	[birthday] [varchar](50) NULL,
  CONSTRAINT [PK_userinfo] PRIMARY KEY CLUSTERED 
 (
 	[id] ASC
 )WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
 ) ON [PRIMARY]
 
 GO
 
 SET ANSI_PADDING OFF
 GO

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