editable grid and validation problem

[mariacri11]

Hello!

Here is my problem:
I have an editable datagrid with edititem templates.
I want to validate the data entered into the grid using a RegularExpressionValidator, but I get this error:

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.
Source Error:

Line 23: valid.Validate

The code I am using is:

Dim valid as RegularExpressionValidator=new System.Web.UI.WebControls.RegularExpressionValidator
valid.ErrorMessage="eroarrrrrrrrrrrrrrrre!!!!!!!!!!"
valid.ValidationExpression="\d{3}"
valid.ControlToValidate="test"
valid.Validate

 

[crazyboybert]

Do you have an instance of the validator declared in your .aspx? A common cause of this erorr is trying to use a control which is not declared in the .aspx or is declared in the .aspx but does not have the attribute runat="server"

From your code it lookis like your trying to programatically create a validator and use it. I'm not sure if you can do this or not, I havent tried. You could of course just use the regular expression classes ti achieve this programatically without using a validator at all. Else if you want it to validate page input and display a suitable message then I'd reccomend adding the validator control to the .aspx and declaring it in the normal way fro controls.

hope this helps

Rob

 

[mariacri11]

Thanks Rob!

After trying to do this for a while I rconsidered using the effective control placed in the edititem template of my grid.
And it worked.
And it's easier.

Cri