I am having issues with setting properties of a user control during Page_Load of the hosting page. My attempts are usually met with "Control not declared" or "Object reference not set to an instance of an object".

The user control is just a label (just for testing - I will be doing much more later on). I have added one public property called LabelText. It is registered properly:
<%@ Register TagPrefix="uc1" TagName="MyUserControl" Src="MyUserControl.ascx" %>

In the HTML, I can set this property at design time with no problem. However, in the page load event, I try to do something like MyUserControl1.LabelText = "test" and I am met with one of the errors listed above. I have used the declaration "Dim MyUserControl1 as MyUserControl" to the same effect.

According to gotdotnet http://samples.gotdotnet.com/quickst...bpagelets.aspx
setting the properties should be strightforward. What am I missing?

Eventually, this will be a dynamic navigation panel - but I will need to set nav links at page load time.

Thanks in advance,
Colonel

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In God we trust, everything else we test.

Ok, "after further review", another thread shed some light on the subject. I dragged and dropped on to the page with VS.NET, but the user control was never declared along with the host form's controls.

That is, I added
Protected WithEvents MyUserControl1 As MyUserControl

Now, I have access as I thought I would.

Being self conscious and in need of affirmation, I would appreciate any comments on this solution.

Thanks again,
Colonel

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In God we trust, everything else we test.

Hi there,

This is a known issue with Visual Studio .NET. It should add a declaration for the control in the Code Behind, just as it does with server controls.

Your work-around is the way to go; that is, you'll need to add the declaration yourself.

Check this article for more information.

Cheers,

Imar


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Imar Spaanjaars
Everyone is unique, except for me.

I have found that if I close the page and open it again that VS.NET then adds it to the code behind.

The problem has been fixed for VS.NET 2003 which I now have.

Thank you for your comments. (Dank U, Imar)

I believe I am using VS.NET Studio 2003, and I had closed the page and reopened to no effect. Have you patched Studio at all?

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In God we trust, everything else we test.

Graag gedaan ;)

It indeed seems fixed in Visual Studio 2003. When you switch between Code View and Design View, VS adds the declaration for the control for you. (And then you spend the next 5 minutes fixing the HTML that VS screwed up).

The article says that the problem applies to VS .NET 2003 as well, but that seems not to be the case. The link to the article got messed up. Somehow the ; between the items were removed (bug in the forum?). Here's the link again: http://support.microsoft.com/default...316370&GSSNB=1

AFAIK, there are no patches available for VS .NET. I use the Check for an Update feature every now and then, but it never said there was an update. I guess Microsoft just publishes a new major release instead of a service pack ;)

Cheers,

Imar


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Imar Spaanjaars
Everyone is unique, except for me.