Solved

Binding a web user control in another ContentPlaceHolder

Posted on 2006-07-18
7
770 Views
Last Modified: 2008-01-09
I have a master page with multiple ContentPlaceHolders. The first one contains a web user control of class Controls_CategorySelector. The second one contains a data source, and one of its parameters is bound to the SelectedCategory property of the CategorySelector. How can this binding be done without compilation error?

<asp:Content ID="Content1" ContentPlaceHolderID="LeftMenuHolder" runat="Server">
    <uc1:CategorySelector ID="catSelector" runat="server" OnLoad="CategorySelectorLoad"/>    
</asp:Content>

<asp:Content ID="Content2" ContentPlaceHolderID="ContentHolder" runat="Server">
    <asp:SqlDataSource ID="ArticleDataSource" runat="server" ConnectionString="<%$ ConnectionStrings:RTFMConnectionString %>"
        SelectCommand="listRecentArticles" SelectCommandType="StoredProcedure">
        <SelectParameters>
            <asp:ControlParameter ControlID="catSelector" DefaultValue="0" Name="categoryId"
                PropertyName="SelectedCategory" Type="Int32" />
        </SelectParameters>
    </asp:SqlDataSource>    
</asp:Content>

The ControlID "catSelector" is only found by the compiler if the data source and the CategorySelector are in the same ContentPlaceHolder.
0
Comment
Question by:pallosp
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 3
7 Comments
 
LVL 96

Expert Comment

by:Bob Learned
ID: 17129733
What is 'CategorySelector' defined as?

Bob
0
 
LVL 9

Author Comment

by:pallosp
ID: 17130003
It is a RadioButtonList populated from code. The category ID belonging to the SelectedIndex property is led out as SelectedCategory.
0
 
LVL 96

Expert Comment

by:Bob Learned
ID: 17131211
I was trying to figure out what uc1:CategorySelector was, and it doesn't sound like a RadioButtonList.  Is it a third-party control, or a home-grown custom web control?

Bob
0
Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
LVL 9

Author Comment

by:pallosp
ID: 17132459
Here is a simple code without web user controls that produce the same phenomenon:

masterpage.master:

<%@ Master Language="C#" AutoEventWireup="true" CodeFile="MasterPage.master.cs" Inherits="MasterPage" %>
<!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">
        <div>
            <asp:ContentPlaceHolder ID="ContentPlaceHolder1" runat="server"></asp:ContentPlaceHolder>
            <asp:ContentPlaceHolder ID="ContentPlaceHolder2" runat="server"></asp:ContentPlaceHolder>
        </div>
    </form>
</body>
</html>

default.aspx:

<%@ Page Language="C#" MasterPageFile="~/MasterPage.master" AutoEventWireup="true"
    CodeFile="Default.aspx.cs" Inherits="_Default" Title="Untitled Page" %>

<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" runat="Server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder2" runat="Server">
    <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
    <asp:GridView ID="GridView1" runat="server" DataSourceID="ObjectDataSource1">
    </asp:GridView>
    <asp:ObjectDataSource ID="ObjectDataSource1" runat="server" SelectMethod="GetItems"
        TypeName="Class1">
        <SelectParameters>
            <asp:ControlParameter ControlID="TextBox1" Name="prefix" PropertyName="Text" Type="String" />
        </SelectParameters>
        </asp:ObjectDataSource>
</asp:Content>

app_code/class1.cs:

public class Class1
{
    public static string[] GetItems(string prefix) {
        return new string[] { prefix+"1", prefix+"2" };
    }
}

After TextBox1 had been moved to the first ContentPlaceHolder, the code didn't compile.
0
 
LVL 96

Expert Comment

by:Bob Learned
ID: 17132939
It compiled for me with TextBox1 under Context1.  I created a Web Site model type web site, and I don't know which type you created.  But, I can't see where that would cause a problem.

Bob
0
 
LVL 96

Accepted Solution

by:
Bob Learned earned 500 total points
ID: 17132978
Aaah, yes, it's a run-time exception:

    Could not find control 'TextBox1' in ControlParameter 'prefix'.

Try this:

            <asp:ControlParameter ControlID="ContentPlaceHolder1$TextBox1" Name="prefix" PropertyName="Text" Type="String" />

Bob
0
 
LVL 9

Author Comment

by:pallosp
ID: 17133370
Big thanks!
0

Featured Post

Revamp Your Training Process

Drastically shorten your training time with WalkMe's advanced online training solution that Guides your trainees to action.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Just a quick little trick I learned recently.  Now that I'm using jQuery with abandon in my asp.net applications, I have grown tired of the following syntax:      (CODE) I suppose it just offends my sense of decency to put inline VBScript on a…
I recently went through the process of creating a Calendar Control of events with the basis of using a database to keep track of the dates that are selectable, one requirement was to have the selected date pop-up in a simple lightbox.  At first this…
The Email Laundry PDF encryption service allows companies to send confidential encrypted  emails to anybody. The PDF document can also contain attachments that are embedded in the encrypted PDF. The password is randomly generated by The Email Laundr…

710 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question