MessageHandler Function

Allows you to customize messages shown to the user.

Declaration

export const MessageHandler: DevExpress.Analytics.Internal.IGlobalSubscribableValue<IMessageHandler>

Parameters

Name	Type
newVal	IMessageHandler

Returns

Type
IMessageHandler

Remarks

Use the MessageHandler property to customize error messages shown to the user, as demonstrated in the following code snippet:

JavaScript

DevExpress.Reporting.Viewer.Settings.MessageHandler.processError
    = function (message, showForUser, prefix) {
            DevExpress.Analytics.Internal.ShowMessage(prefix.substring(0, prefix.length - 2));
        };

The picture below shows the Document Viewer, which attempts to load the “TestReport1” report whose data is corrupted. A custom error message is displayed:

You can choose any approach to display notifications in your application.