Category Class

Represents a category in the Enterprise Search metadata property schema.


Namespace:  Microsoft.Office.Server.Search.Administration
Assembly:  Microsoft.Office.Server.Search (in Microsoft.Office.Server.Search.dll)

[SharePointPermissionAttribute(SecurityAction.LinkDemand, ObjectModel = true)]
public sealed class Category

In the Enterprise Search schema, crawled properties are grouped into different categories, representing the protocol handler used. For more information about crawled properties, see Managing Metadata.

Use the AllCategories property of the Schema class to get the collection of property categories in the Shared Service Provider's search schema.

Use an indexer to return a single managed property from the CategoryCollection object.

For example, assuming the collection is assigned to a variable named categories, use categories[index] in Microsoft Visual C# or categories(index) in Microsoft Visual Basic, where index is a string containing the name of the category or a GUID identifying the property set for the category.

The following code example writes out the full list of categories to the console window.


Ensure a Shared Service Provider is already created.

Project References

Add the following Project References in your console application code project before running this sample:

  • Microsoft.SharePoint

  • Microsoft.Office.Server

  • Microsoft.Office.Server.Search

using System;
using System;
using System.Collections.Generic;
using System.Text;
using Microsoft.Office.Server.Search.Administration;
using Microsoft.SharePoint;
namespace CategoriesSample
    class Program
        static void Main(string[] args)
                //Replace <SiteName> with the name of a site using the Shared Service Provider
                string strURL = "http://<SiteName>";
                Schema sspSchema = new Schema(SearchContext.GetContext(new SPSite(strURL)));
                CategoryCollection categories = sspSchema.AllCategories;
                foreach (Category category in categories)
            catch(Exception ex)

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

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