Finding a Control Reference by it's Design-Time ID

[Guest]

I need to be able to get a reference to a Control on an ASPX Page by the
exact ID that I gave that control at Design-Time.

Let's say I created an ASPX that had a control:
<asp:TextBox ID="SomeTB" runat="server" />

Now, I want to be able to discover, at run-time, the ClientID of the
Control. But here's the tough part: I'll only have the string "ID" as it had
been set at Design-Time.

So I tried doing FindControl() but that expects the full, "mangled" run-time
Client ID. And I don't have that because I don't know what it'll be.

Is there no way to get a reference to a Control at run-time based on what
it's DESIGN-TIME ID had been?

Alex

 

[Walter Wang [MSFT]]

Hi Alex,

Since currently FindControl cannot find controls recursively, you need to
following function to find a control by its id which maybe in deeper
hierarchy:

private Control FindControlRecursive(Control root, string id)
{
if (root.ID == id)
{
return root;
}

foreach (Control c in root.Controls)
{
Control t = FindControlRecursive(c, id);
if (t != null)
{
return t;
}
}

return null;
}

Then you can use FindControlRecursive(Page, controlID) to find the control
reference. "controlID" will be the ID you assigned at design-time.

Hope this helps. Please feel free to post here if anything is unclear.

Regards,
Walter Wang ([email protected], remove 'online.')
Microsoft Online Community Support

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[Guest]

You ROCK! Thank you.

Alex