Composite Server Controls Question

[Guest]

I created a composite control containing a TextBox. The Text property just delegates to the TextBox.Text property. EnsureChildControls() is the first thing I call in both the Get and Set operations.
Nevertheless, whenever I change the value of the Text property at design time I get the "Object reference not set to an instance of an object." error.
I assume the child TextBox is not created and so it cannot be found.
Am I correct and if yes, why?
EnsureChildControls() shouldn't have been taking care of that?

Any ideas?
dimitris

 

[Teemu Keiski]

Hi,

is the the child TextBox accessed properly...e.g it is reference to TextBox
which is created in CreateChildControls?

Can you post the relevant code?

--
Teemu Keiski
MCP, Microsoft MVP (ASP.NET), AspInsiders member
ASP.NET Forum Moderator, AspAlliance Columnist
http://blogs.aspadvice.com/joteke

I created a composite control containing a TextBox. The Text property

just delegates to the TextBox.Text property. EnsureChildControls() is the
first thing I call in both the Get and Set operations.

Nevertheless, whenever I change the value of the Text property at design

time I get the "Object reference not set to an instance of an object."
error.

 

[John Saunders]

I created a composite control containing a TextBox. The Text property

just delegates to the TextBox.Text property. EnsureChildControls() is the
first thing I call in both the Get and Set operations.

Nevertheless, whenever I change the value of the Text property at design

time I get the "Object reference not set to an instance of an object."
error.

I assume the child TextBox is not created and so it cannot be found.
Am I correct and if yes, why?
EnsureChildControls() shouldn't have been taking care of that?

EnsureChildControls works by calling your CreateChildControls override.
That's where you should create the child TextBox.