Validation question

[burak]

Hello,

 

I am trying to do validation in the code behind.

 

I have a textbox "txtCompAddrs"

 

Protected WithEvents txtCompAddrs As System.Web.UI.WebControls.TextBox

 

Here is my code to validate it

 

Dim x As RequiredFieldValidator

 

x.ControlToValidate = txtCompAddrs.ID

x.Validate()

 

When I run the page I get a

 

"Object reference not set to an instance of an object."

 

error for this line

 

x.ControlToValidate = txtCompAddrs.ID

 

If you look at,

 

http://www.aspalliance.com/aspxtrem...ToValidate.aspx

 

it says we are supposed to set the controltovalidate property to the object to be validated's id. I think my code is correct but it is not working.

 

How can I set the controltovalidate of a requiredfieldvalidator?

 

Burak

[dynamic_sysop]

have you tried swapping this line around

x.ControlToValidate = txtCompAddrs.ID

to

txtCompAddrs = new System.Web.UI.WebControls.TextBox
'/// make it a new instance.
txtCompAddrs.ID = x.ControlToValidate

because txtCompAddrs needs to be initialized.

[burak]

Hi,

 

txtCompAddrs is a textbox on the html form, and it is the textbox i am checking to make sure it is filled in.

 

so why does it need to be initialized? I am confused about that.

 

the requiredfieldvalidator's controltovalidate property should be set to txtCompAddrs but so far I have not been able to figure out how to do it.

 

By the way, congratulations on your twins, I am an identical twin myself.

 

Burak

[PlausiblyDamp]

Is there a reason why you are adding the validator in code rather than the designer?

[burak]

I am doing the validation in the code behind because I have a checkbox list control on the form, and the validation is only going to take place depending on which checkboxes are checked.

 

ie.. if the "Address" checkbox is checked I am going to validate the address, if the "Email" checkbox is checked I am going to validate the email etc..