具有以下设置,如果您通过委托/事件处理程序更改它,为什么更新面板不反映标签文本更改?你会如何让它发挥作用?
测试.aspx:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Test.aspx.cs" Inherits="Test"
EnableEventValidation="false" %>
<!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>Test</title>
</head>
<body style="text-align: center">
<form id="form1" runat="server">
<ajaxToolkit:ToolkitScriptManager runat="server" ID="ToolkitScriptManager1" EnableScriptGlobalization="true"
EnableScriptLocalization="true" />
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:Label ID="Label1" runat="server" Text="Example label"></asp:Label>
<asp:Button ID="btnChange" OnClick="btnChange_Click" runat="server" Text="Change">
</asp:Button>
<table id="tableMessage" runat="server" style="display: none" >
<tr>
<td>
<asp:Label ID="lb5" runat="server" Text="Warning"></asp:Label>
</td>
</tr>
<tr>
<td >
<asp:Label ID="lbMessage" runat="server"></asp:Label><br />
</td>
</tr>
<tr>
<td>
<asp:Button ID="btnOk" runat="server" AccessKey="a" Font-Bold="True" Text="Ok"
Width="125px" OnClick="btnOk_Click" />
<asp:Button ID="btnCancel" runat="server" AccessKey="C" Font-Bold="True" Text="Cancel"
Width="125px" OnClick="btnCancel_Click" />
</td>
</tr>
</table>
<asp:Button ID="btnOKError" runat="server" Text="OK" Style="display: none" />
<ajaxToolkit:ModalPopupExtender
ID="ModalPopupMessage" runat="server" TargetControlID="btnOKError" PopupControlID="tableMessage"
OkControlID="btnOKError" CancelControlID="btnOKError" DropShadow="true">
</ajaxToolkit:ModalPopupExtender>
</ContentTemplate>
</asp:UpdatePanel>
</form>
</body>
</html>
测试.aspx.cs:
using System;
using System.Web.UI;
using AsistenciasCapadatos;
public partial class Test : Page
{
private EventHandler OkButtonClick
{
get { return SessionActual.Get<EventHandler>("OkButtonClick"); }
set { SessionActual.Set("OkButtonClick", value); }
}
protected void Page_Load(object sender, EventArgs e)
{
}
protected void btnChange_Click(object sender, EventArgs e)
{
MessageConfirm("Do you want to change label?", btnChange1_Click);
}
protected void btnChange1_Click(object sender, EventArgs e)
{//the text property changes correctly but the updatepanel doesnt reflect it...viewstate ajax bug?
Label1.Text = "Change1";
}
protected void btnChange2_Click(object sender, EventArgs e)
{
Label1.Text = "Change2";
}
protected void btnOk_Click(object sender, EventArgs e)
{
//Label1.Text = "Change1"; //this way works
OkButtonClick.Invoke(sender, e); //this doesnt
}
protected void btnCancel_Click(object sender, EventArgs e)
{
}
public void MessageConfirm(string message, EventHandler btnclick)
{
OkButtonClick = btnclick;
lbMessage.Text = message;
ModalPopupMessage.Show();
}
}