Hi all,
I have a MasterPage with invisible Label.
In content page I have a few controls and any Button.
When user clicks the Button, the Label on MasterPage appears.
So far - so good.
If I use an UpdatePanel inside the content page, the Label stay invisible
I know, that it's right behavior for Ajax enabled application, but...
What is the solution?
MasterPage:
<%@dotnet.itags.org. Master Language="C#" AutoEventWireup="true" CodeFile="TestMasterPage.master.cs" Inherits="TestMasterPage" %><!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>Untitled Page</title></head><body> <form id="form1" runat="server"> <asp:ScriptManager ID="ScriptManager1" runat="server" /> <asp:contentplaceholder id="ContentPlaceHolder1" runat="server"> </asp:contentplaceholder> <asp:Label ID="Label1" runat="server" Text="Error!" Visible="False"/> </form></body></html>
Content page:
<%@dotnet.itags.org. Page Language="C#" MasterPageFile="~/TestMasterPage.master" AutoEventWireup="true" CodeFile="TestContentPage.aspx.cs" Inherits="TestContentPage" Title="Untitled Page" %><asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server"> <asp:UpdatePanel ID="UpdatePanel1" runat="server"> <ContentTemplate> <asp:ListBox ID="ListBox1" runat="server"> <asp:ListItem Value="1">Item 1</asp:ListItem> <asp:ListItem Value="2">Item 2</asp:ListItem> <asp:ListItem Value="3">Item 3</asp:ListItem> <asp:ListItem Value="4">Item 4</asp:ListItem> </asp:ListBox> <br /> <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" /> </ContentTemplate> </asp:UpdatePanel></asp:Content>
Content page code behind:
protected void Button1_Click(object sender, EventArgs e) {//Do something... //... Label lbl = (Label)Page.Master.FindControl("Label1");if (lbl !=null) lbl.Visible =true; } The solution: enclose the Label on the MasterPage by UpdatePanel:
<%@. Master Language="C#" AutoEventWireup="true" CodeFile="TestMasterPage.master.cs" Inherits="TestMasterPage" %><!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>Untitled Page</title></head><body> <form id="form1" runat="server"> <asp:ScriptManager ID="ScriptManager1" runat="server" /> <asp:contentplaceholder id="ContentPlaceHolder1" runat="server"/> <asp:UpdatePanel ID="updatePanel2" runat="server"> <ContentTemplate> <asp:Label ID="Label1" runat="server" Text="Error!" Visible="False"/> </ContentTemplate> </asp:UpdatePanel> </form></body></html>
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