Typo - make one of the lines:
args.IsValid = (!String.IsNullOrEmpty(txt
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Client-Side Data Validation. Require that at least one of two fields have a value.
ASP.NET VB.NET. .NET 2.0 Validation
How can I accomplish the following validation task:
I have two fields - and the user must enter a value in at least one of them. So simply using a required field validator on each won't work because they both are not required, only one of them is. So how can I (using client-side) accomplish this ?
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Answers
No, you need serverside. Clientside would only be an advantage as it saves you the roundtrip, not the validity of the data.
Using javascript it would be like:
function isValid(){
var txtBox1 = document.getElementById("t
var txtBox2 = document.getElementById("t
return (txtBox1.value!=""||txtBox
}
Make sure you call this clientside method when the button is clicked or form is submitted.
btnMySubmitButton.Attribut
Cheers,
CJ.
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by: CJ_SPosted on 2007-06-06 at 09:34:59ID: 19226502
Multiple options available, simplest would be:
<asp:customvalidator id="valOneOfTwo" runat="server" ... />
...
protected override void OnInit(EventArgs e)
{
...
valOneOfTwo.ServerValidate
base.OnInit(e);
}
void valOneOfTwo_ServerValidate
{
args.IsValid = String.IsNullOrEmpty(txtBo
}