Umbraco Event handler - Raise Custom UI Error message

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I am using Umbraco 7.2.4. I added functionality to publish event.

how can I raise custom Error message while there is Exception in my code, and display it to the user?

I tried: var clientTool = new Umbraco.Web.UI.Pages.ClientTools((System.Web.UI.Page)HttpContext.Current.CurrentHandler); clientTool.ShowSpeechBubble(SpeechBubbleIcon.Error, "Choose first a content page", "Page has not been added.");

But it's throw Exception: Unable to cast object of type 'System.Web.Http.WebHost.HttpControllerHandler' to type 'System.Web.UI.Page'

Thank

asked 1 min ago

Shir

14

Umbraco Event handler - Raise Custom UI Error message