All controls are null within usercontrol

Question

I have a UserControl which uses a UserControl, among other controls.

In the ascx file I have the following code:

<%@ Register TagPrefix=         


        

Answer 1

The issue here is usually due the the load mechanics of user controls, they load after the page typically. So as a result the controls have not yet been initialized on your usercontrol (causing the null ref) during the containing page_load method. One way to work around this is to just create and set a property on the usercontrol and have the usercontrol wire-up/populate its own UI in its Page_Load method.

Something like this:

//Page
protected void Page_Load(object sender, EventArgs e)
{
    test.Text = "Hello World!";
}

//User Control
public string Text {get; set;}

protected void Page_Load(object sender, EventArgs e)
{
    lblTest.Text = Text;
}