Add Custom DropDown

Telerik Web Parts for SharePoint 2010 last build was R1 2023 SP2 and is discontinued since then.

Bellow are the exact steps that demonstrate how to add a custom dropdown when using RadEditor for SP2010:

1. Open the respective ToolsFile situated in the /Program Files/Common Files/Microsoft Shared/web server extensions/wpresources/RadEditorSharePoint/6.x.x.0__1f131a624888eeed/Resources folder and add the custom dropdown's declaration e.g. <tool name="CustomDropdown" type="dropdown"> <item name="Item 1" Value="1"/> <item name="Item 2" Value="2"/> <item name="Item 3" Value="3"/></tool>

2. Next, open the /Program Files/Common Files/Microsoft Shared/web server extensions/wpresources/RadEditorSharePoint/6.x.x.0__1f131a624888eeed/Resources/SPEditorTools.js file and add the dropdown's command:

   JavaScript

    Telerik.Web.UI.Editor.CommandList["CustomDropdown"] = function (commandName, editor, args)
    {
        alert("Value selected: " + args.get_value());
    };

3. To improve the custom dropdown's appearance, you should provide image file for it, by setting the following CSS class in corresponding Master page:

   XML

    <style type="text/css">
        .rade_toolbar.<skinName> .<commandName>
        {
         background-image: url(MyImage.gif)!important;
        }
        .rade_toolbar.Telerik .CustomDropdown
        {
         background-image: url(https://www.telerik.com/DEMOS/ASPNET/RadControls/Editor/Skins/Default/buttons/CustomDialog.gif)!important;
        }
    </style>

4. Clear the browser's cache and test the result.