CustomPropertyToolPart Class

Represents the default tool part that is displayed in the tool pane for a Web Part that implements one or more custom properties (properties other than those provided by the WebPart base class).

Namespace:  Microsoft.SharePoint.WebPartPages
Assembly:  Microsoft.SharePoint (in Microsoft.SharePoint.dll)
Available in Sandboxed Solutions: No

[AspNetHostingPermissionAttribute(SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
public sealed class CustomPropertyToolPart : ToolPart

A custom property will be automatically displayed using an instance of the CustomPropertyToolPart class in the default property pane if the property is of type String, Boolean, Integer, or Enum. The following table describes how each of these property types is displayed in the CustomPropertyToolPart class in the property pane.

Property type

Displayed in property pane as


Check box


Drop down


Text box


Text box


Text box

The following simple Web Part example demonstrates the use of the WebPartToolPart class and the CustomPropertyToolPart class to customize the display of Web Part properties in the tool pane. The example overrides the GetToolParts method of the WebPart base class in order to display the Web Part's standard properties in the tool pane followed by its custom properties, and then to expand specific sections of each tool part and to hide specific standard properties. The WebPartToolPart class automatically displays the Web Part's standard properties, and the CustomPropertyToolPart class automatically displays the Web Part's custom properties.

using System;
using System.ComponentModel;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Xml.Serialization;
using Microsoft.SharePoint;
using Microsoft.SharePoint.Utilities;
using Microsoft.SharePoint.WebPartPages;

namespace WebPartLibrary1CS
        ToolboxData("<{0}:WebPart1 runat=server></{0}:WebPart1>"),
    public class WebPart1 : Microsoft.SharePoint.WebPartPages.WebPart
        private const string defaultText = "";
        private string text=defaultText;

            FriendlyName("Text"),Description("Text Property")]
        public string Text
                return text;

                text = value;
        public override ToolPart[] GetToolParts()
            ToolPart[] toolparts = new ToolPart[2];
   CustomPropertyToolPart custom = new CustomPropertyToolPart();
            WebPartToolPart wptp = new WebPartToolPart();
            toolparts[0] = wptp;
            toolparts[1] = custom;

            return toolparts;
        protected override void RenderWebPart(HtmlTextWriter output)

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.