Question

So I have made a custom required field validator that turns the background of a textbox red. For this I have implemented a custom control that inherits from required field validator.

Everything is working great and the control functions properly. The only thing is that the control does a post back and the error of the custom required field validator is not caught in the validation section of the page life cycle.

public class MVADRequiredFieldValidator : RequiredFieldValidator
    {
protected override void OnInit(EventArgs e)
    {
        if(Page.IsPostBack)
        {
            Validate();
            var mvadRequiredFieldValidator = this;
            var controlToValidate = ControlToValidate;

            TextBox tbToChange = (TextBox)FindControl(controlToValidate);

            if(!IsValid)
            {
                if (tbToChange != null)
                {
                    tbToChange.CssClass = "error";
                }
            }
            else
            {
                if (tbToChange != null)
                {
                    tbToChange.CssClass = "nonError";
                }
            }
        }
        //OnInit(e);

    }
}

I know about the asp.net page life-cycle but I have not yet found a method to override that will register the error with the collection of errors on the page.

Thanks

Answer 1

What about EvaluateIsValid(); Seems to be what you want

http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.basevalidator.evaluateisvalid.aspx

from this post

http://forums.asp.net/t/1049481.aspx/1

This seems really similar to waht you want to do

http://www.codeproject.com/KB/aspnet/enhacedvalidator.aspx