这是一个非常常见的问题，我已经尝试了所有明显的解决方案，希望SO能够提供一些帮助... 我在页面中有一个包含多个控件并引发回发的重复器的UserControl。问题是，重复器内的所有控件在回发时都不会触发它们的事件处理程序，但是重复器外部的控件（仍在UC中）被正确处理。我已经确认我的控件没有因为缺少
if(!IsPostBack)而被重新生成，并且我验证了Page_Load事件中Request.Form["__EVENTTARGET"]包含正确的控件ID。我试图在另一个项目中重现这些症状，结果却正常。<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="NoteListControl.ascx.cs"
Inherits="SantekGBS.Web.UserControls.NoteListControl" %>
<asp:UpdatePanel ID="upNotes" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<div class="NoteList" id="divNoteList" runat="server">
<asp:Repeater ID="repNotes" runat="server">
<HeaderTemplate>
<table width="98%" cellpadding="3" cellspacing="0">
</HeaderTemplate>
<ItemTemplate>
<tr class="repeaterItemRow">
<asp:ImageButton ID="ImageButton1" runat="server" ImageUrl="~/Content/images/DeleteIcon.gif"
OnClick="ibRemove_Click" CommandArgument='<%# Container.ItemIndex %>' CommandName='<%# Eval("ID") %>'
CausesValidation="false" AlternateText="Delete" />
<%# Eval("Text") %></td>
</tr>
</ItemTemplate>
<FooterTemplate>
</table>
</FooterTemplate>
</asp:Repeater>
<asp:PlaceHolder ID="phNoNotes" runat="server" Visible="false">
<div class="statusMesssage">
No notes to display.
</div>
</asp:PlaceHolder>
</div>
</ContentTemplate>
</asp:UpdatePanel>
public partial class NoteListControl : UserControl
{
[Ninject.Inject]
public IUserManager UserManager { get; set; }
protected List<Note> Notes
{
get
{
if (ViewState["NoteList"] != null)
return (List<Note>)ViewState["NoteList"];
return null;
}
set { ViewState["NoteList"] = value; }
}
public event EventHandler<NoteEventArgs> NoteAdded;
public event EventHandler<NoteEventArgs> NoteDeleted;
public event EventHandler<NoteEventArgs> NoteChanged;
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
UtilityManager.FillPriorityListControl(ddlPriority, false);
}
}
protected void ibRemove_Click(object sender, ImageClickEventArgs e)
{
System.Diagnostics.Debug.WriteLine("ibRemove POSTBACK"); // This is NEVER hit
}
public void Fill(List<Note> notes)
{
Notes = notes;
RefreshRepeater();
}
private void RefreshRepeater()
{
if (Notes != null && Notes.Any())
{
var sorted = Notes.OrderByDescending(n => n.Timestamp);
Notes = new List<Note>();
Notes.AddRange(sorted);
repNotes.Visible = true;
phNoNotes.Visible = false;
repNotes.DataSource = Notes;
repNotes.DataBind();
}
else
{
repNotes.Visible = false;
phNoNotes.Visible = true;
}
}
}
public class NoteEventArgs : EventArgs
{
public Note Note { get; set; }
public NoteEventArgs()
{ }
public NoteEventArgs(Note note)
{
this.Note = note;
}
}
这段代码故意缺少一些功能，因此请忽略这一点。