Custom Textbox control w/ Required Val

[rpeters74]

I would like to create a custom TextBox that has a RequiredFieldValidator on it. I have attempted creating such a control that Inherits from TextBox, adding a RequiredFeildValidator (using Me.Controls.Add) in CreateChildControls. I set the RequiredFeildValidator.ControlToValidate property to Me.ID. When I run I get an error stating that the ControlToValidate can not be found.

I would like to create this control Inheriting from Textbox to expose all the TextBox attributes. Is this possible?

 

[dragonwell]

Should be possible, although I think what you want to create is a composite control, or a new control that contains both the textbox and the validator.

Basically, use composition rather than inheritance.

You could either expose the control's inner text box as a property, or wrap some of the text box's properties with properties in your own control.




Greetings,
Dragonwell

 

[rpeters74]

I figured that was the an option. Inherit WebControl then have the textbox and validator created in the CreateChildControls. Just was fishing for a way to do so w/o having to expose all of the Texboxes inherent controls manually. 'preciate the response dragonwell!

 

[rpeters74]

So I went ahead an crated a control with a Textbox and a ReqFieldValidator.

I created another control that uses the above control. In the new control I want to be able to point to the Textbox in the above control as the ControlToValidate. I keep geeting the following error :

Unable to find control id 'num_txtMonth__txtTextbox' referenced by the 'ControlToValidate' property of ''.