Still Stumped on passing property to dynamically loaded UC

[darrel]

I'm still a bit stumped on how to load a usercontrol, and then pass a
property value (or variable value) to it.

Here's what I'm using to load the UC:

localCUstomControl.ascx.vb
-------------------------------------
sub initializeExtraControls()
panel_controlHolder.visible = True
customContentControl = CType(Page.LoadControl("../usercontrols/" &
customContent &".ascx"),UserControl)
panel_controlHolder.Controls.Add(customContentControl)
End Sub
-------------------------------------

That works just fine, loading the UC. Now, where I get stuck is how do I
pass a property value to that UC?

In the UC I am loading I have this:


usercontrol.ascx.vb
-------------------------------------
public property sampleProperty
-------------------------------------

I've tried just using customContentControl.sampleProperty = "whatever" but
that doesn't work, as sampleProperty is not a mamber of
'system.web.ui.usercontrol'

I've been reading and re-reading this MSDN article:
http://msdn.microsoft.com/library/d...guide/html/cpconexposingpageletproperties.asp

But I'm guessing I'm missing something obvious.

-Darrel

 

[Matt Berther]

Hello darrel,

The way to make this happen is to define an interface or a base class that
your user control derives from and then cast to that type in your method.

[C#]
public class MyControlBase : System.Web.UI.UserControl
{
private string myProp;

public string SampleProperty
{
get { return myProp; }
set { myProp = value; }
}

}

public class MyConcreteControl : MyControlBase
{
}

Then in LoadCustomControl:

private void InitializeExtraControls()
{
panel_controlHolder.Visible = true;
MyControlBase customContentControl = (MyControlBase)Page.LoadControl("../usercontrols/"
+ customContent + ".ascx");
customContentControl.SampleProperty = "foo";
panel_controlHolder.Controls.Add(customContentControl);
}

Hope this helps...

 

[darrel]

The way to make this happen is to define an interface or a base class that

your user control derives from and then cast to that type in your method.

Is that the only way? I was using interfaces for a bit, but we decided it
was overkill for what we were trying to accomplish. I'll take a second look
at them, though.

It seems odd that it's so incredibly easy to set a property when loading a
control in the ASPX file, but considerably more complicated when doing it
from the codebehind file. ;o)

-Darrel

 

[Trevor Benedict R]

Have you tried

CType(customContentControl, customContent).SomeProperty = value or a
variation of this.

Trevor Benedict R
MCSD

 

[Matt Berther]

Hello darrel,

Is that the only way? I was using interfaces for a bit, but we decided
it was overkill for what we were trying to accomplish. I'll take a
second look at them, though.

An interface would work as well.

It seems odd that it's so incredibly easy to set a property when
loading a control in the ASPX file, but considerably more complicated
when doing it from the codebehind file. ;o)

Amazing what the ASP.NET compilation model hides from you, isnt it?

 

[darrel]

CType(customContentControl, customContent).SomeProperty = value or a

variation of this.

What is 'customContent' in the above example? Is that a class/namespace I'd
create?

-Darrel