# OnClientCommandExecuting

This event is fired just before a command is executed.

| **function OnClientCommandExecuting(editor, args)** |            |                                                |
| --------------------------------------------------- | ---------- | ---------------------------------------------- |
| **editor**                                          | **object** | Returns a reference to RadEditor client object |
| **args**                                            | **object** | Returns the needed information about the event |

| **args parameter methods** |                                                                                  |
| -------------------------- | -------------------------------------------------------------------------------- |
| **args.get_commandName()** | Returns the command name                                                         |
| **args.get_value()**       | Returns the value of the executed tool                                           |
| **args.set_value()**       | Sets the new content to be pasted in RadEditor                                   |
| **args.get_cancel()**      | Returns Boolean value that indicates whether the event has been canceled or not. |
| **args.set_cancel(true)**  | Cancels the command execution                                                    |

The following example demonstrates how to alert the selected dropdown item name and value:

```ASP.NET
<script type="text/javascript">
	function OnClientCommandExecuting(editor, args)
	{    
		//The command name    
		var commandName = args.get_commandName();               
		//The tool that initiated the command    
		var tool = args.get_tool();                   
		//The selected value [if command is coming from a dropdown]    
		var value = args.get_value();           

		//Perform some action     
		var message = "OnClientCommandExecuting.\nSelected value: " + value;                                           
		var answer = confirm(message + "\nExecute command " + commandName +"?");
		//Cancel the command execution by calling args.set_cancel(true);    
		args.set_cancel(!answer);
	}
</script>
<telerik:RadEditor RenderMode="Lightweight" runat="server" ID="RadEditor1" OnClientCommandExecuting="OnClientCommandExecuting">
</telerik:RadEditor>
```