Passing dynamic variable to UserControl attribute

Question

I'm creating an UserControl and I'm passing a variable to it.

It works fine if I do it this way:

<uc:TestControl ID="testControl" runat="server" Variable="test"></uc:TestControl>

However I want to pass a dynamic variable to the control like this:

<uc:TestControl ID="testControl" runat="server" Variable="<%=dynamicVariable%>"></uc:TestControl>

But unfortunately that doesn't work and I know I could assign it on Page_Load but I don't like that way.

So I'm wondering if it's possible at all. Is there any way to assign a dynamic variable to an attribute like I wanted above? Or am I required to do it in Page_Load?

Any feedback would be appreciated! Thanks!

score 4 · Accepted Answer · edited May 23 '17 at 12:14

4

<%= syntax doesn't work with controls marked as runat="server" .Try using the databind syntax

Variable="<%#dynamicVariable%>"

Then calling databind on the user control as per this SO question

EDIT

To database i think it's a straight

testControl.DataBind()

supported in ASP.Net 3.5 and greater.

edited May 23 '17 at 12:14

Community

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answered Feb 23 '12 at 16:25

Crab Bucket

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Hmmm I see, how exactly would I databind it? – Jón Trausti Arason Feb 23 '12 at 16:42
Wouldn't that mean I need to DataBind the control in Page_Load? Which is basically what I want to avoid :/ – Jón Trausti Arason Feb 23 '12 at 16:47
ah - yep. You get the syntax you want but ... you are into the server side. I think it's as close as you are going to get TBH. Someone else might know more – Crab Bucket Feb 23 '12 at 16:55
I resolved it, I just made the control itself DataBind in the overriden Render method. Thanks a lot for the help! – Jón Trausti Arason Feb 24 '12 at 09:57

Passing dynamic variable to UserControl attribute

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