Control Tree Recursion Using ASP.NET 2.0
page 2 of 5
by Tom Blanchard
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Creating your Master Page

So now let's create a page that has a "Master Page" and get the controls within it.

Firstly, create a new solution. Then Create a "Master Page". In the "Master Page", create a table with two content panels. We are going to create a page that would have links on the left and content displayed within panels on the right.

Listing 2

<table cellspacing="0" cellpadding="0" style="width:100%;vertical-align:top">
            <td id="LeftNav" style="vertical-align:top">
            <asp:ContentPlaceHolder ID="ContentPlaceHolder1" runat="server">
            <td id="Content">
          <asp:ContentPlaceHolder ID="ContentPlaceHolder2" runat="server">

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User Comments

Title: very useful   
Name: shubha
Date: 2008-09-12 7:09:52 AM
this article was very useful for me. Actually i was struggling to find, how to find out the type of the control in a panel. Its a very simple solution to use 'is' operator. But i struggled a lot before finding this article..

thank u Tom Blanchard
Title: Very useful.   
Name: Dipal Bhavsar
Date: 2008-06-25 1:24:16 AM
Hi, this is very useful to me...

Dipal Bhavsar
Title: check the link from the article in the first paragraph   
Name: TB
Date: 2008-02-19 1:22:29 PM
It is just basically is an updated way to go through something similar in the 2.0 framework.
It is more of looping than recursing.
Title: Misleading   
Name: none
Date: 2008-02-19 12:48:02 PM
This is nice and all, but there isn't anything recursive about it.
Title: Just what I was looking for!   
Name: Will Asrari
Date: 2007-06-14 11:48:50 PM
Sweet. Thanks!
Title: Good Job   
Name: Tom Blanchard
Date: 2006-10-06 2:26:27 PM
Excellent Job Rizwan! I didn't even go into HTMLControls, but glad it was easy for you to adapt.
Title: Rizwan Gulamhussein   
Name: Control Tree Recursion Using ASP.NET 2.0
Date: 2006-10-06 1:48:45 AM
Sorry, by the way, I forgot to mention that your code as well as my own code snippet works.

Title: Control Tree Recursion Using ASP.NET 2.0   
Name: Rizwan Gulamhussein
Date: 2006-10-06 1:44:11 AM
Great article Tom.

In my code, I have a single gridview that contains HTML radio buttons and HTML checkboxes. Although intellisense displays the name of the gridview, the debugger complained.

What I did was this:

GridView targetGrid = (GridView)FindControl("TargetSegmentGridView");

foreach (GridViewRow row in targetGrid.Rows)

Happy coding! :)
Title: Error in text   
Name: Tom Blanchard
Date: 2006-08-07 11:43:56 AM
foreach(Control oCtl in ctl.Controls) {
Should read foreach(Control ctl1 in oCtl.Controls) {

Some of this was copied from actual code that I have used and some of the names were changed to protect the innocent, however, I apparently missed something.

My apologies.
Title: error   
Name: interesting
Date: 2006-08-07 11:25:12 AM
when I run this, i get the following error

: CS0103: The name 'ctl' does not exist in the current context

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