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Zone: > NEWSGROUP > Asp.Net Forum > general_asp.net.master_pages_themes_and_navigation_controls Tags:
Item Type: NewsGroup Date Entered: 2/27/2008 5:00:13 AM Date Modified: Subscribers: 0 Subscribe Alert
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parrotrebozo
Asp.Net User
C# LinkButton with MasterPage2/27/2008 5:00:13 AM

0/0

Hi. I am trying to use a dynamically-generated LinkButton control to asynchronously populate a submenu.

For example, choosing one of these LinkButton controls (created in code-behind)
        Hardware (id=A1)   ||   Software (id=A2)   ||   Books (id=A3)    ||    etc.
would present a separate menu of
            Software:Games   ||   Software:Finance   ||    etc.

The code works fine if I use it on a stand-alone .aspx page; however, once I attach the page to a MasterPage the link no longer works the way I expect.

Here is what I see as the issue: when the button is on the stand-alone page the ID I assign it remains as I expect ('A2'); when the page has a MasterPage, the ID I assign is appended to the end of the .NET-generated ID, 'ctl00$ContentPlaceHolder1$A2'. Consequently, I can no longer access the value using Request["__EVENTTARGET"].

How can I get around this so that I can access this ID from the code-behind while still using the MasterPage?

Thank you for your time.

=========================================================
.cs file...
protected void Page_Load(object sender, EventArgs e)
{
    this.loadmenu1();
}
public void loadmenu1()
{
    LinkButton newcontrol;
    string displayname = "";
    string displayid = "";
    string[] menu1names = new string[] { "MENU1", "MENU2", "MENU3" };
    for (int i = 0; i < menu1names.Length; i++)
    {
        displayname = menu1names[i];
        displayid = (string)i.ToString();
        newcontrol = new LinkButton();
        newcontrol.Attributes.Add("runat", "server");
        newcontrol.ID = displayid;
        newcontrol.Text = displayname + " || ";
        divmenu1.Controls.Add(newcontrol);
    }
    if (menu1names.Length > 0)
    {
        //string selectedmenuA = Request["__EVENTARGUMENT"];
        string selectedmenuB = Request["__EVENTTARGET"];
        this.loadmenu2(selectedmenuB);
    }
}
public void loadmenu2(string menu1id)
{
    switch (menu1id)
    {
        case "0":
            divmenu2.InnerHtml = "ONE";
            break;
        case "1":
            divmenu2.InnerHtml = "TWO";
            break;
        case "2":
            divmenu2.InnerHtml = "THREE";
            break;
        default:
            divmenu2.InnerHtml = "";
            break;
    }
}

=========================================================
Does NOT work:
.master file...
<%@ Master Language="C#" AutoEventWireup="true" CodeBehind="debug.master.cs" Inherits="mercury.masterpages.debug" %>
<!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 id="Head1" runat="server">
        <title>Untitled Page</title>
    </head>
    <body>
        <form id="form1" runat="server">
            <asp:ScriptManager ID="ScriptManager1" runat="server" EnablePageMethods="true" EnablePartialRendering="true" />
            <div>
                <asp:ContentPlaceHolder ID="ContentPlaceHolder1" runat="server" />
            </div>
        </form>
    </body>
</html>

.aspx file (with MasterPage...
<%@ Page Language="C#" MasterPageFile="~/masterpages/debug.master" AutoEventWireup="true" CodeBehind="asynclinkbuttontest.aspx.cs" %>
<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
    <div>
        <asp:UpdatePanel ID="UpdatePanel1" runat="server">
            <ContentTemplate>
                <div ID="divmenu1" runat="server" />
                <hr />
                <div ID="divmenu2" runat="server" />
            </ContentTemplate>
        </asp:UpdatePanel>
    </div>
</asp:Content>

=========================================================
DOES work:
.aspx file (stand-alone)...
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="asynclinkbuttontest.aspx.cs" %>
<!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" />
            <div>
                <asp:UpdatePanel ID="UpdatePanel1" runat="server">
                    <ContentTemplate>
                        <div ID="divmenu1" runat="server" />
                        <hr />
                        <div ID="divmenu2" runat="server" />
                    </ContentTemplate>
                </asp:UpdatePanel>
            </div>
        </form>
</body>
</html>

- Scott
1 Items, 1 Pages 1 |< << Go >> >|


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