Blog by Anoop Kumar Sharma

Hello All,

Today, I was trying to add a custom validator to my page, as we know that Page.IsValid is responsible to run all validators attached to page. Following Code snippet will create a custom validator on the fly:
In VB:

Dim custom_validate As New CustomValidator()
                custom_validate.IsValid = False
                custom_validate.ErrorMessage = "This is dynamic error by server"
                custom_validate.Display = ValidatorDisplay.Dynamic
                Page.Validators.Add(custom_validate)
                

or in c#:

CustomValidator custom_validate = new CustomValidator();
custom_validate.IsValid = False;
                custom_validate.ErrorMessage = "This is dynamic error by server";
                custom_validate.Display = ValidatorDisplay.Dynamic;
                Page.Validators.Add(custom_validate);

Above code will create a custom validator and add that to page validators.

Best way to show error to centered to page is add a Validation summary and validator’s property display will automatically put error message to validation summary itself.

Any Queries? Let me know.