Question

Here’s my scenario:

  <!-- Normal Control -->
  <div class="required">
    <label for="address1">Address line 1</label>
    <input type="text id="address1" name="address1" class="inputText" />
  </div>

  <!-- Same Control - but with a validation error -->
  <div class="required error">
    <p class="error">Address Line 1 Field is required</p>
    <label for="address1">Address line 1</label>
    <input type="text id="address1" name="address1" class="inputText" />
  </div>

In the “validation error” html area, I’m able to show the message using code like this:

  <div class="required">
    <asp:RequiredFieldValidator id="address1_validate" runat="server" ControlToValidate="address1" Text='<p class="error">Address Line 1 Field is required</p>' />
    <label for="address1">Address (line 1)</label>
    <asp:TextBox id="address1" CssClass="inputText" CausesValidation="true" runat="server"/>
  </div>

What I’m not able to do is add the additional class to the surrounding div tag.
I was thinking that I could do something like:

  <div class="required <%= !address1_validate.isValid ? "error" : "" %>">

That pretty much doesn’t work.

Anyway, I don’t want to have to rely on JavaScript to set these values – it needs to work like “Web 1.0”.

Any ideas?

Thanks,
Jon

——- My Solution——-
Here’s the code behind that worked for me:

  protected void Page_Load(object sender, EventArgs e)
  {
    if (this.IsPostBack)
    {
      address1_validate.Validate();
      if (!address1_validate.IsValid)
      {
        address_panel.CssClass = "required error";
      }
    }
  }

And the front-end:

  <asp:Panel runat="server" id="address_panel" CssClass="required">
    <asp:RequiredFieldValidator id="address1_validate" runat="server" ControlToValidate="address1" Text='<p class="error">Address Field is required</p>' />
    <label for="address1">Address (line 1)</label>
    <asp:TextBox id="address1" CssClass="inputText" CausesValidation="true" EnableViewState="true" runat="server"  />
  </asp:Panel>

Thanks for the help!

Answer 1

You could replace the div with an ASP panel, runat=server of course.

<asp:Panel runat="server" ID="Panel1">
    <label for="address1">Address line 1</label>
    <input type="text id="address1" name="address1" class="inputText" />
</asp:Panel>

In the codebehind, you can then do –

address1_validate.Validate();
...
...
if(address1_validate.IsValid)
     Panel1.CssClass = "required";
else
     Panel1.CssClass = "required error";