Events

Updated on Sep 15, 2025

This topic covers the specific events exposed by the RadImageEditor and RadImageEditorUI controls.

RadImageEditor Events

The ImageEditor raises the following events:

• CommandError—Occurs when an error gets thrown while executing a command. Through the CommandErrorEventArgs, you can access the following property:

  • Exception—Gets the currently thrown exception.

• CommandExecuted—Occurs when a command gets executed. Through the ImageCommandExecutedEventArgs, you can access the following properties:

  • Command—Gets the current executed command.
  • CommandParameter—Gets the current executed command parameter.

• CommandExecuting—Occurs before a command gets executed. Through the ImageCommandExecutingEventArgs, you can access the following properties:

  • Command—Gets the current executed command.
  • CommandParameter—Gets the current executed command parameter.

• ImageViewSizeChanged—Occurs when the ImageViewSize property changes.

  ImageViewSize property of RadImageEditor holds the actual image size (with scaling) set to the control.

• IsReadOnlyChanged—Occurs when the IsReadOnly property changes.

• ScaleFactorChanged—Occurs when the ScaleFactor value has changed.

• ToolCommitted—Occurs when a tool is committed. Through the ToolCommittedEventArgs, you can access the following properties:

  • Tool—Gets the current executed tool.
  • ExecuteSameToolAfterCommit—Gets or sets a value indicating whether the tool is preserved as a current executing tool. If set to false, the current executing tool will be deactivated.

• ToolCommitting—Occurs before a tool is committed. Through the ToolCommittingEventArgs, you can access the following property:

  • Tool—Gets the current executed tool.

When a tool is executed, the CommandExecuting/CommandExecuted events are raised for the ExecuteToolCommand. The specific tool is available from the CommandParameter, however you cannot control its behavior (for example, cancel it). For this purpose the ToolCommitting/ToolCommitted events are raised. Find a working example of their usage in our online SDK reporitory: Handle Tool Commit.

RadImageEditorUI Events

The RadImageEditorUI component exposes the ImageEditorLoaded event, that occurs when the underlying RadImageEditor control is loaded. The image editor can be accessed using the ImageEditor property of RadImageEditorUI.

ImageEditorLoaded event handler

C#

	private void RadImageEditorUI_ImageEditorLoaded(object? sender, EventArgs e)
	{
		RadImageEditorUI ui = (RadImageEditorUI)sender;
		RadImageEditor imageEditor = ui.ImageEditor;
	}

See Also

• Commands and Tools