ASP.net CompareValidator-VCO.DataTypeCheck check other types?

[johnfraser]

Hi there. Not new to C# but fairly new to ASP.net C#

I'm working with existing code and needed some explaination:

CompareValidator class and
ValidationCompareOperator.DataTypeCheck

 public CompareValidator AddDataTypeValidator(WebControl controlToValidate, ValidationDataType dataType, string errorMessage)
        {
            CompareValidator dtv =  new CompareValidator();
            dtv.ID =                GetValidatorName("dtv", controlToValidate);
            dtv.ControlToValidate = GetControlIDForValidator(controlToValidate);
            dtv.ErrorMessage =      errorMessage;
            dtv.Operator =          ValidationCompareOperator.DataTypeCheck;
            dtv.Type =              dataType;
            dtv.Display =           ValidatorDisplay.None;
            AddControl(dtv, controlToValidate);
            return dtv;
        }

========================

Why does this only support the following types?

String = 0,
Integer = 1,
Double = 2,
Date = 3,
Currency = 4,

Finally what would be the best way to support additional validation for other types...? CustomValidator?

 

[jmeckley]

because that's what asp.net came with.
the best option to add additional datatype checks is to extend the ControlValidator.

public class MyCompareValidator : ControlValidator
{
}

you'll need to override the validate control property and Evaluate functions. You'll also need to create a new Enum DataType to check the types not validated by the default control.

for more information google "create control validator".

Jason Meckley
Programmer
Specialty Bakers, Inc.