求教高手一个DataGrid与CheckBox问题，解决马上给分

应该是在ItemDataBound事件里:
For Each CheckBoxItem In MyGrid.Items //去掉这句!!
IsChecked = CType(CheckBoxItem.FindControl("DeleteOrNot"), CheckBox).Checked
..................

IsChecked = CType(e.Item.FindControl("DeleteOrNot"), CheckBox).Checked

.aspx文件
<%@ Page language="c#" Codebehind="DataGridCheckBox.aspx.cs" AutoEventWireup="false" Inherits="test.DataGridCheck" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<HEAD>
<title>DataGridCheck</title>
<meta content="Microsoft Visual Studio 7.0" name="GENERATOR">
<meta content="C#" name="CODE_LANGUAGE">
<meta content="JavaScript" name="vs_defaultClientScript">
<meta content="http://schemas.microsoft.com/intellisense/ie5" name="vs_targetSchema">
</HEAD>
<body>
<form id="DataGridCheck" method="post" runat="server">
<asp:datagrid id="dgMain" runat="server" Width="98%" AutoGenerateColumns="False">
<SelectedItemStyle Font-Size="9pt" Font-Names="宋体"></SelectedItemStyle>
<EditItemStyle Font-Size="9pt" Font-Names="宋体" Font-Bold="True" ForeColor="Red" BackColor="Info"></EditItemStyle>
<AlternatingItemStyle Font-Size="9pt" Font-Names="宋体" ForeColor="ControlText" BackColor="White"></AlternatingItemStyle>
<ItemStyle Font-Size="9pt" Font-Names="宋体" ForeColor="ControlText" BackColor="WhiteSmoke"></ItemStyle>
<HeaderStyle Font-Bold="True" HorizontalAlign="Center" ForeColor="Black" VerticalAlign="Middle" BackColor="Control"></HeaderStyle>
<Columns>
<asp:TemplateColumn HeaderText="操作">
<HeaderStyle HorizontalAlign="Center" Width="50px"></HeaderStyle>
<ItemTemplate>
<asp:CheckBox ID="chkExport" Runat="server" />
</ItemTemplate>
<EditItemTemplate>
<asp:CheckBox ID="chkExportON" Runat="server" Enabled="true" />
</EditItemTemplate>
</asp:TemplateColumn>
<asp:TemplateColumn Visible="False">
<ItemTemplate>
<asp:Label Text='<%# DataBinder.Eval(Container.DataItem, "medicine_id")%>' runat="server" Width="80%" ID="lblID" />
</ItemTemplate>
</asp:TemplateColumn>
<asp:BoundColumn DataField="medicine_id" ReadOnly="True" HeaderText="药品编号">
<HeaderStyle Width="80px"></HeaderStyle>
</asp:BoundColumn>
<asp:TemplateColumn SortExpression="demo" HeaderText="药品名称">
<ItemTemplate>
<asp:Label Text='<%# Server.HtmlEncode((string)DataBinder.Eval(Container.DataItem, "medicine_name"))%>' runat="server" Width="80%" ID="lblColumn" />
</ItemTemplate>
</asp:TemplateColumn>
</Columns>
</asp:datagrid><asp:button id="cmdSelectAll" runat="server" Text="全部选中"></asp:button><asp:button id="cmdFindSelected" runat="server" Text="删除选中的项目"></asp:button><br>
<asp:label id="Label1" runat="server"></asp:label></form>
</body>
</HTML>
.aspx.cs文件
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.Configuration;namespace test
{
/// <summary>
/// DataGridCheck 的摘要说明。
/// </summary>
public class DataGridCheck : System.Web.UI.Page
{
protected System.Web.UI.WebControls.DataGrid dgMain;
protected System.Web.UI.WebControls.Button cmdSelectAll;
protected System.Web.UI.WebControls.Button cmdFindSelected;
protected System.Web.UI.WebControls.Label Label1;
protected System.Data.SqlClient.SqlConnection cn;
protected System.Data.SqlClient.SqlCommand cm;
protected System.Data.SqlClient.SqlDataAdapter da;
DataView oDataView;

private void Page_Load(object sender, System.EventArgs e)
{
// 在此处放置用户代码以初始化页面
// dgMain.Columns[0].HeaderText = "选项";
// dgMain.Columns[1].HeaderText = "药品编号";
// dgMain.Columns[2].HeaderText = "药品名称";
// cmdFindSelected.Text = "删除选中的项目";
if( !this.IsPostBack)
{
cmdSelectAll.Text = "全部选中";
RefreshGrid();
cmdFindSelected.Attributes.Add("onclick","return confirm('yes/no');");
}
} #region Web Form Designer generated code
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.cmdSelectAll.Click += new System.EventHandler(this.cmdSelectAll_Click);
this.cmdFindSelected.Click += new System.EventHandler(this.cmdFindSelected_Click);
this.Load += new System.EventHandler(this.Page_Load); }
#endregion private void cmdSelectAll_Click(object sender, System.EventArgs e)
{
selectAll();
} private void selectAll()
{
System.Web.UI.WebControls.CheckBox chkExport ;
if( cmdSelectAll.Text == "全部选中")
{
foreach(DataGridItem oDataGridItem in dgMain.Items)
{
chkExport = (CheckBox)oDataGridItem.FindControl("chkExport");
chkExport.Checked = true;
}
cmdSelectAll.Text = "全部不选";
}
else
{
foreach(DataGridItem oDataGridItem in dgMain.Items)
{
chkExport = (CheckBox)oDataGridItem.FindControl("chkExport");
chkExport.Checked = false;
}
cmdSelectAll.Text = "全部选中";
}
} private void RefreshGrid()
{
DataSet oDataSet = new DataSet();
try
{
string sSQL = "Select * from medicine order by medicine_id";
cn = new SqlConnection(ConfigurationSettings.AppSettings["sa"]);
da = new SqlDataAdapter(sSQL,cn);
cn.Open();
da.Fill(oDataSet,"medicine");
oDataView = new DataView(oDataSet.Tables["medicine"]);
dgMain.DataSource = oDataView;
dgMain.DataKeyField="medicine_id";
dgMain.DataBind();
cn.Close();
}
catch(Exception ex)
{
Label1.Text = ex.ToString();
}
} private void cmdFindSelected_Click(object sender, System.EventArgs e)
{
System.Web.UI.WebControls.CheckBox chkExport;
System.Collections.ArrayList oExArgs = new System.Collections.ArrayList();
string sID;
Label1.Text = "";
foreach(DataGridItem oDataGridItem in dgMain.Items)
{
chkExport = (CheckBox)oDataGridItem.FindControl("chkExport");
if( chkExport.Checked)
{
Label1.Text = "";
sID = ((Label)oDataGridItem.FindControl("lblID")).Text；
oExArgs.Add(sID);
int i = 0;
cn = new SqlConnection(ConfigurationSettings.AppSettings["sa"]);
cn.Open();
string DeleteSQL="";
for( i = 0;i<oExArgs.Count;i++)
{
// DeleteSQL="delete from medicine where medicine_id='"+oExArgs[i]+"'";
DeleteSQL="Update medicine set medicine_stocks=medicine_stocks+1 where medicine_id='"+oExArgs[i]+"'";
oExArgs.Clear();//保证不会重复更新。是重要的一个步骤。 cm = new SqlCommand(DeleteSQL,cn);
cm.ExecuteNonQuery();
DeleteSQL="";
}
cn.Close();
}
}
RefreshGrid();
cmdSelectAll.Text = "全部选中";
}
}
}

还是不行啊，怎么搞的。我是玩VB的，楼上的兄台都写VB看看嘛

http://dotnet.aspx.cc/ShowDetail.aspx?id=FF130C7F-3650-4DA6-8943-8AA4AF3E3459http://dotnet.aspx.cc/Exam/DataGridCheckBox/DataGridCheckBox.aspx

http://www.codeproject.com/aspnet/datagrid_checkbox.asp

改好了，最后的结果为：                谢谢大家，散分
Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        Dim MyConnection As New SqlConnection("server=localhost;uid=sa;pwd=007;database=pubs")
        Dim DeleteCmd As String = "DELETE FROM Account WHERE AccountID = @Uid"
        Dim MyCommand As New SqlCommand(DeleteCmd, MyConnection)
        MyCommand.Parameters.Add("@Uid", SqlDbType.Int)
        Dim IsChecked As Boolean
        Dim CheckBoxItem As DataGridItem
        For Each CheckBoxItem In MyGrid.Items            IsChecked = CType(CheckBoxItem.FindControl("DeleteOrNot"), CheckBox).Checked
            If IsChecked Then
                MyCommand.Parameters("@Uid").Value = MyGrid.DataKeys(CheckBoxItem.ItemIndex)
                MyCommand.Connection.Open()
                MyCommand.ExecuteNonQuery()
                Try
                    MyCommand.ExecuteNonQuery()
                    Message.Text = "数据记录已经成功删除"
                Catch Exc As SqlException
                    Message.Text = "错误: 无法删除数据纪录"
                End Try                MyCommand.Connection.Close()
            End If
        Next
        Angel()
    End Sub

调试易

求教高手一个DataGrid与CheckBox问题，解决马上给分

解决方案 »