Control TextBox Border with Validation

[IntegrityWebDev]

Recently this list helped me a lot with understanding form validation in ASP.NET (C#)...thanks!

Now I'm back with another question. I understand the basics of validation...but I'm wondering, is there a way to use form validation to control the border color (and other attributes) of a TextBox.

Here's my code:

<asp:TextBox ID="name" runat="server" ForeColor="#2378B8" Width="245px"></asp:TextBox>

<asp:RequiredFieldValidator InitialValue="" ControlToValidate="name" Display="Dynamic" ID="name1" runat="server" ErrorMessage="<br>Required Field." />

Bonus question...can this also be done for drop down lists?

Thanks!
Chris

[marcel]

Here is a very simple example with a text box and a Custom Validator, this will also work with a DropDown List:

HTML

<asp:TextBox ID="TextBox1" runat="server" />
<asp:CustomValidator ID="CustomValidator1" runat="server" ErrorMessage="*" onservervalidate="CustomValidator1_ServerValidate" />
<asp:Button ID="Button1" runat="server" Text="Button" />

Code behind:

protected void CustomValidator1_ServerValidate(object source, ServerValidateEventArgs args)
{
if (TextBox1.Text == String.Empty)
{
TextBox1.Style.Add("border", "solid 1px red");
args.IsValid = false;
}
}

A more elegant solution would be to use something like jQuery, a search for jQuery Validation will yield a multitude of possible solutions.

[IntegrityWebDev]

Marcel...you come through again! Thanks I will check out this solution and also search for jQuery Validation.

[marcel]

I forgot to add a link to the Javascript/Ajax forums, they'll be able to help you out with jQuery there:
[webmasterworld.com...]