0

I have a Visual Studio project in which I have created a Visual Webpart. In the user control I have a panel which I want to display in edit mode and hide in browse mode.

ASP.NET code snippet:

<asp:panel runat="server" ID="myControl">

C# code snippet in user control code behind:

protected override void OnPreRender(EventArgs e)
{
    base.OnPreRender(e);
    WebPartManager wpm = WebPartManager.GetCurrentWebPartManager(this.Page);
    if (wpm.DisplayMode == WebPartManager.BrowseDisplayMode)
    {
        myControl.Attributes.Add("style", "display: none");
    }
    else if (wpm.DisplayMode == WebPartManager.EditDisplayMode)
    {
        myControl.Attributes.Add("style", "display: block");
    }
}

This works, but if I have two webparts on same page and put on webpart is edit mode it shows the panel in both webparts.

How can I resolve this? Is there any better (or preferred) way to do it?

NOTE: I need to use display: none because the panel would be accessed via JavaScript.

Update 1:

I even tried writing code as this.myControl.Attributes.Add("style", "display: block"); but it still didn't work.

  • if you have two controls with the same Id it will find two of them and not know which one to use, makes sense right? I think this is your problem here – Gwny Aug 20 '15 at 11:52
  • @Gwny: Agreed. But the C# code runs in the user control's code behind. So all it should see is its on control. Right? If it is able to view something else then I think this is an issue. – Naveen Aug 20 '15 at 11:57
0

Each WebPart should have its own ID, and you can iterate over all WebParts in the manager (I don't do backend, but conceptually the same as front-end)

As for best pratice; don't mess with styles. Transfer all your display logic to CSS classes, and only set those Classes in your code. That way your presentation is a lot more loosly coupled with your backend code.

  • How would I identify current webpart by iterating over all the webparts? – Naveen Aug 20 '15 at 13:39

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.