dynamic validators

[Guest]

Is there a way to, based on the selection of another control, add a required
field validator to another field (code behind vb.net)?
I don't want the field to be required unless a checkbox or date field has
been entered.

Thanx.

 

[Brock Allen]

Sure, in Page_Load:

if (ConditionsMet)
{
RequiredFieldValidator val = new RequiredFieldValidator();
val.ControlToValidate = "idOfOtherControl";
val.Text = "* Required";
val.ErrorMessage = "You must provide a value for my other control";
somePlaceHolderInYourPage.Controls.Add(val);
}

So this assumes you have some <asplaceHolder> or other control positioned
in the page where you want to add in your validation control.

 

[Guest]

thanx I'll try to convert this in VB.NET.

Sure, in Page_Load:

if (ConditionsMet)
{
RequiredFieldValidator val = new RequiredFieldValidator();
val.ControlToValidate = "idOfOtherControl";
val.Text = "* Required";
val.ErrorMessage = "You must provide a value for my other control";
somePlaceHolderInYourPage.Controls.Add(val);
}

So this assumes you have some <asplaceHolder> or other control positioned
in the page where you want to add in your validation control.

 

[Brock Allen]

If ConditionsMet Then
dim va as new RequiredFieldValidator() ';
val.ControlToValidate = "idOfOtherControl" ';
val.Text = "* Required" ';
val.ErrorMessage = "You must provide a value for my other control" ';
somePlaceHolderInYourPage.Controls.Add(val) ';
End If