[code=C#][/code]
protected void btn_de2_Click(object sender, EventArgs e)
{
CheckBox isDeleted;
foreach (DataListItem anItem in dl1.Items)//遍历所有checkbox找出用户选择的项
{
isDeleted = ((CheckBox)anItem.FindControl("Delete"));
if (isDeleted.Checked)
{
string bianh = Convert.ToString(dl1.DataKeys[dl1.SelectedIndex]);//索引超出范围。必须为非负值并小于集合大小。参数名: index
string bianh = Convert.ToString(dl1.DataKeys[dl1.SelectedItem.ItemIndex]);//未将对象引用设置到对象的实例
pbClass.Delete(bianh);
dl1.DataSource = pbClass.DbSource();
dl1.DataBind();
使用了上面两个方法，后面是错误信息，
作了修改后
string bianh = Convert.ToString(dl1.DataKeys[anItem.ItemIndex]);//集合已修改；可能无法执行枚举操作。
提示了这样的问题，请高手解释一下这些错误的原因，和解决方法。。。。
------解决方案--------------------------------------------------------
没有问题
测试代码
- HTML code
<%@ Page Language="C#" EnableViewState="true" %><%@ Import Namespace="System.Xml" %><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><script runat="server"> public System.Data.DataTable CreateDataTable() { System.Data.DataTable dataTable1 = new System.Data.DataTable("BlogUser"); System.Data.DataRow dr; dataTable1.Columns.Add(new System.Data.DataColumn("Id", typeof(System.Int32))); dataTable1.Columns.Add(new System.Data.DataColumn("Title", typeof(System.String))); for (int i = 0; i < 8; i++) { dr = dataTable1.NewRow(); dr[0] = i; dr[1] = "【孟子E章】" + i.ToString(); dataTable1.Rows.Add(dr); } return dataTable1; } protected void Page_Load(object sender, EventArgs e) { if (!Page.IsPostBack) { DataList1.DataSource = CreateDataTable(); DataList1.DataBind(); } } protected void Button1_Click(object sender, EventArgs e) { CheckBox isDeleted; foreach (DataListItem anItem in DataList1.Items)//遍历所有checkbox找出用户选择的项 { isDeleted = ((CheckBox)anItem.FindControl("Delete")); if (isDeleted.Checked) { string bianh = DataList1.DataKeys[anItem.ItemIndex].ToString(); Response.Write("<li>" + bianh); } } }</script><html xmlns="http://www.w3.org/1999/xhtml"><head id="Head1" runat="server"> <title>无标题页</title></head><body onclick="myfunction()"> <form id="form1" runat="server"> <asp:DataList ID="DataList1" runat="server" DataKeyField="Id"> <ItemTemplate> <div> <asp:CheckBox ID="Delete" runat="server" /> <%#Eval("Title") %></div> </ItemTemplate> </asp:DataList> <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Style="height: 21px" Text="Button" /> </form></body></html>