(论坛答疑点滴)Datagrid怎么根据选择的checkbox编辑和更新多行记录？
有网友问这个问题，写了一个简单的例子：
前台：
<%@ Page language="c#" Codebehind="WebForm4.aspx.cs" AutoEventWireup="false" Inherits="WebApplication25.WebForm4" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<HEAD>
<title>WebForm4</title>
<meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1">
<meta name="CODE_LANGUAGE" Content="C#">
<meta name="vs_defaultClientScript" content="JavaScript">
<meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
</HEAD>
<body>
<form id="Form1" method="post" runat="server">
<asp:DataGrid id="DataGrid1" runat="server" AutoGenerateColumns="False" DataKeyField="EmployeeID">
<Columns>
<asp:TemplateColumn>
<ItemTemplate>
<input type="hidden" id="SelectedID" runat="server" value='<%# Container.ItemIndex%>' name="SelectedID"/>
<asp:CheckBox ID="chkExport" Runat="server" />
</ItemTemplate>
</asp:TemplateColumn>
<asp:BoundColumn DataField="EmployeeID" HeaderText="EmployeeID"></asp:BoundColumn>
<asp:TemplateColumn HeaderText="FirstName">
<ItemTemplate>
<asp:Label ID="lab_FirstName" Runat="server" Text='<%#DataBinder.Eval(Container.DataItem,"FirstName")%>'>
</asp:Label>
<asp:TextBox ID="txt_FirstName" Runat="server" Text='<%#DataBinder.Eval(Container.DataItem,"FirstName")%>' Visible="False">
</asp:TextBox>
</ItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn HeaderText="LastName">
<ItemTemplate>
<asp:Label ID="lab_LastName" Runat="server" Text='<%#DataBinder.Eval(Container.DataItem,"LastName")%>'>
</asp:Label>
<asp:TextBox ID="txt_LastName" Runat="server" Text='<%#DataBinder.Eval(Container.DataItem,"LastName")%>' Visible="False">
</asp:TextBox>
</ItemTemplate>
</asp:TemplateColumn>
</Columns>
</asp:DataGrid>
<asp:Button id="Button1" runat="server" Text="编辑"></asp:Button>
<asp:Button id="Button2" runat="server" Text="更新"></asp:Button>
</form>
</body>
</HTML>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<HEAD>
<title>WebForm4</title>
<meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1">
<meta name="CODE_LANGUAGE" Content="C#">
<meta name="vs_defaultClientScript" content="JavaScript">
<meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
</HEAD>
<body>
<form id="Form1" method="post" runat="server">
<asp:DataGrid id="DataGrid1" runat="server" AutoGenerateColumns="False" DataKeyField="EmployeeID">
<Columns>
<asp:TemplateColumn>
<ItemTemplate>
<input type="hidden" id="SelectedID" runat="server" value='<%# Container.ItemIndex%>' name="SelectedID"/>
<asp:CheckBox ID="chkExport" Runat="server" />
</ItemTemplate>
</asp:TemplateColumn>
<asp:BoundColumn DataField="EmployeeID" HeaderText="EmployeeID"></asp:BoundColumn>
<asp:TemplateColumn HeaderText="FirstName">
<ItemTemplate>
<asp:Label ID="lab_FirstName" Runat="server" Text='<%#DataBinder.Eval(Container.DataItem,"FirstName")%>'>
</asp:Label>
<asp:TextBox ID="txt_FirstName" Runat="server" Text='<%#DataBinder.Eval(Container.DataItem,"FirstName")%>' Visible="False">
</asp:TextBox>
</ItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn HeaderText="LastName">
<ItemTemplate>
<asp:Label ID="lab_LastName" Runat="server" Text='<%#DataBinder.Eval(Container.DataItem,"LastName")%>'>
</asp:Label>
<asp:TextBox ID="txt_LastName" Runat="server" Text='<%#DataBinder.Eval(Container.DataItem,"LastName")%>' Visible="False">
</asp:TextBox>
</ItemTemplate>
</asp:TemplateColumn>
</Columns>
</asp:DataGrid>
<asp:Button id="Button1" runat="server" Text="编辑"></asp:Button>
<asp:Button id="Button2" runat="server" Text="更新"></asp:Button>
</form>
</body>
</HTML>
后台：
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
namespace WebApplication25
{
/// <summary>
/// WebForm4 的摘要说明。
/// </summary>
public class WebForm4 : System.Web.UI.Page
{
protected System.Web.UI.WebControls.Button Button1;
protected System.Web.UI.WebControls.Button Button2;
protected System.Web.UI.WebControls.DataGrid DataGrid1;
protected System.Web.UI.HtmlControls.HtmlInputHidden SelectID;
private void Page_Load(object sender, System.EventArgs e)
{
// 在此处放置用户代码以初始化页面
if(!IsPostBack)
{
SetBind();
}
}
private void SetBind()
{
SqlConnection conn=new SqlConnection("server=srvxglai-sha;uid=sa;pwd=321413;database=northwind");
SqlDataAdapter da=new SqlDataAdapter("select * from Employees",conn);
DataSet ds=new DataSet();
da.Fill(ds,"table1");
this.DataGrid1.DataSource=ds.Tables["table1"];
this.DataGrid1.DataBind();
}
#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.Button1.Click += new System.EventHandler(this.Button1_Click);
this.Button2.Click += new System.EventHandler(this.Button2_Click);
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
private void Button1_Click(object sender, System.EventArgs e)
{
foreach(DataGridItem di in this.DataGrid1.Items)
{
if(((CheckBox)di.FindControl("chkExport")).Checked==true)
{
((TextBox)di.FindControl("txt_FirstName")).Visible=true;
((TextBox)di.FindControl("txt_LastName")).Visible=true;
((Label)di.FindControl("lab_FirstName")).Visible=false;
((Label)di.FindControl("lab_LastName")).Visible=false;
}
}
}
private void Button2_Click(object sender, System.EventArgs e)
{
foreach(DataGridItem di in this.DataGrid1.Items)
{
if(((CheckBox)di.FindControl("chkExport")).Checked==true)
{
if(((TextBox)di.FindControl("txt_FirstName")).Text!=((Label)di.FindControl("lab_FirstName")).Text||((TextBox)di.FindControl("txt_LastName")).Text!=((Label)di.FindControl("lab_LastName")).Text)
{
Response.Write("记录号:"+this.DataGrid1.DataKeys[int.Parse(((HtmlInputHidden)di.FindControl("SelectedID")).Value)]+",FirstName:"+((TextBox)di.FindControl("txt_FirstName")).Text+",LastName:"+((TextBox)di.FindControl("txt_LastName")).Text+"<br>");
}
((TextBox)di.FindControl("txt_FirstName")).Visible=false;
((TextBox)di.FindControl("txt_LastName")).Visible=false;
((Label)di.FindControl("lab_FirstName")).Visible=true;
((Label)di.FindControl("lab_LastName")).Visible=true;
((CheckBox)di.FindControl("chkExport")).Checked=false;
}
}
}
}
}
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
namespace WebApplication25
{
/// <summary>
/// WebForm4 的摘要说明。
/// </summary>
public class WebForm4 : System.Web.UI.Page
{
protected System.Web.UI.WebControls.Button Button1;
protected System.Web.UI.WebControls.Button Button2;
protected System.Web.UI.WebControls.DataGrid DataGrid1;
protected System.Web.UI.HtmlControls.HtmlInputHidden SelectID;
private void Page_Load(object sender, System.EventArgs e)
{
// 在此处放置用户代码以初始化页面
if(!IsPostBack)
{
SetBind();
}
}
private void SetBind()
{
SqlConnection conn=new SqlConnection("server=srvxglai-sha;uid=sa;pwd=321413;database=northwind");
SqlDataAdapter da=new SqlDataAdapter("select * from Employees",conn);
DataSet ds=new DataSet();
da.Fill(ds,"table1");
this.DataGrid1.DataSource=ds.Tables["table1"];
this.DataGrid1.DataBind();
}
#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.Button1.Click += new System.EventHandler(this.Button1_Click);
this.Button2.Click += new System.EventHandler(this.Button2_Click);
this.Load += new System.EventHandler(this.Page_Load);
}
#endregion
private void Button1_Click(object sender, System.EventArgs e)
{
foreach(DataGridItem di in this.DataGrid1.Items)
{
if(((CheckBox)di.FindControl("chkExport")).Checked==true)
{
((TextBox)di.FindControl("txt_FirstName")).Visible=true;
((TextBox)di.FindControl("txt_LastName")).Visible=true;
((Label)di.FindControl("lab_FirstName")).Visible=false;
((Label)di.FindControl("lab_LastName")).Visible=false;
}
}
}
private void Button2_Click(object sender, System.EventArgs e)
{
foreach(DataGridItem di in this.DataGrid1.Items)
{
if(((CheckBox)di.FindControl("chkExport")).Checked==true)
{
if(((TextBox)di.FindControl("txt_FirstName")).Text!=((Label)di.FindControl("lab_FirstName")).Text||((TextBox)di.FindControl("txt_LastName")).Text!=((Label)di.FindControl("lab_LastName")).Text)
{
Response.Write("记录号:"+this.DataGrid1.DataKeys[int.Parse(((HtmlInputHidden)di.FindControl("SelectedID")).Value)]+",FirstName:"+((TextBox)di.FindControl("txt_FirstName")).Text+",LastName:"+((TextBox)di.FindControl("txt_LastName")).Text+"<br>");
}
((TextBox)di.FindControl("txt_FirstName")).Visible=false;
((TextBox)di.FindControl("txt_LastName")).Visible=false;
((Label)di.FindControl("lab_FirstName")).Visible=true;
((Label)di.FindControl("lab_LastName")).Visible=true;
((CheckBox)di.FindControl("chkExport")).Checked=false;
}
}
}
}
}
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