Required Field Validator for multiple controls

[Sam Collett]

Is there a way of having a required field validator check to see if at
least one of a set of controls has information in it? I'm sure this can
somehow be done using a custom validator, but would like a validator
that worked like as a custom tag:

<MyValidator:MultipleRequiredFieldValidator
ControlsToValidate="TextBox1,TextBox2,TextBox3" ErrorMessage="You did
not fill in one of the required fields: TextBox1,TextBox2,TextBox3"
runat="server"/>

If not, how could this be done server-side?

[Anders Norås [MCAD]]

> Is there a way of having a required field validator check to see if at

least one of a set of controls has information in it? I'm sure this can
somehow be done using a custom validator, but would like a validator
that worked like as a custom tag:

<MyValidator:MultipleRequiredFieldValidator
ControlsToValidate="TextBox1,TextBox2,TextBox3" ErrorMessage="You did
not fill in one of the required fields: TextBox1,TextBox2,TextBox3"
runat="server"/>

If not, how could this be done server-side?

The validator controls validate one control at the time. Hence the property
is named ControlToValidate and not ControlsToValidate. You can use the
ValidSummary control create a list of all the controls that are invalid.

Anders Norås
http://dotnetjunkies.com/weblog/anoras/