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The controls in Web Parts must be added by using code. User controls must be compiled before use, which adds to the time it takes to load the control. Web Parts are precompiled and ready for use as soon as you need them. Microsoft SharePoint 2010 introduced Visual Web Parts.
Technically, the SharePoint 2010 Visual Web Part is an ASCX web user control that is hosted inside a standard Web Part. A Visual Web Part is simply a classic Web Part that automatically loads the web user control with it. The advantage of this approach is that you can use Visual Web Developer to design the web user control.
What’s the difference between web part and visual web part?
Differences between Visual Web Parts and Code-Only Web Parts. Microsoft SharePoint 2010 introduced Visual Web Parts. Visual Web Parts are similar to user controls in that you can simply drag and drop items from the Toolbox onto your custom controls to create a Web Part UI. You also get the code-behind file where you implement the UI logic.
With custom editor parts, you can offer users functionality that can be achieved through ASP.NET user controls. A Web Part can implement custom editor parts that can be loaded when the Web Part is in edit mode, expose a custom UI, handle events, and validate inputs.
How to create a custom web part editor?
A default user interface (UI) is given for each Web Part property that is exposed to the user in the Edit Tool pane of the Web Part. For example, a property of type String is rendered as a text box, and an Enum is rendered as a drop-down list box.
How are visual web parts different from traditional web parts?
A Visual Web Part is simply a classic Web Part that automatically loads the web user control with it. The advantage of this approach is that you can use Visual Web Developer to design the web user control. Traditional Web Parts differ from Visual Web Parts in several ways.