Changing the Text property of a text box in the VS IDE makes the text appear in the test box control in the IDE at design time. So, I have created a user control containing a text box, adding a Prompt property to the control's codebehind to set the Text property of the text box. As expected, the text box displays the value entered in the Prompt property at run time .

But, changing the Prompt property in the VS IDE on the page where the control has been consumed does not change the text box's text at design time. What do I need to do to get the value entered in the Prompt property in the VS IDE to appear in the user control (not the property pane!) at design time? Is this simply not possible?

This is by design; as far as I know, the UC never responds to properties set in the grid for the control on the parent page.

If this behavior is important, you could build your own server controls. They have limited design time capabilities that may get you far enough. You can also associate control designers with them which give you the full experience that other, built-in controls have too: https://msdn.microsoft.com/en-us/magazine/cc302014.aspx

Cheers,

Imar

__________________
Imar Spaanjaars
http://Imar.Spaanjaars.Com
Follow me on Twitter

Author of Beginning ASP.NET 4.5 : in C# and VB, Beginning ASP.NET Web Pages with WebMatrix
and Beginning ASP.NET 4 : in C# and VB.
Did this post help you? Click the button below this post to show your appreciation!

Nah - it would just be helpful distinguishing between different instances of the control on the same page during design. Thanks, Imar!