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ThenBy Class

Provides a way to apply a sort expression to an IQueryable data source object after an OrderByExpression expression is applied.


Namespace:  System.Web.UI.WebControls.Expressions
Assembly:  System.Web.Extensions (in System.Web.Extensions.dll)

public class ThenBy

The ThenBy type exposes the following members.

Public methodThenByInitializes a new instance of the ThenBy class.

Public propertyDataFieldGets or sets the property of the IQueryable object to apply the ThenBy expression to.
Public propertyDirectionGets or sets the ordering direction of the IQueryable data source object.

Public methodEquals(Object)Determines whether the specified Object is equal to the current Object. (Inherited from Object.)
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public methodGetHashCodeServes as a hash function for a particular type. (Inherited from Object.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Protected methodMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)

After a sort operation is performed by using the OrderByExpression expression in the QueryExtender control, subsequent sort operations can be performed by using the ThenBy class on a different data field.

The following example shows how to sort data by the ListPrice field in descending order and then on the ProductID field in ascending order using the ThenBy type. This code example is part of a larger example provided in Walkthrough: Filtering Data in a Web Page Using Declarative Syntax.

<asp:OrderByExpression DataField="ListPrice" 
  <asp:ThenBy DataField="ProductID" Direction="Ascending"/>

.NET Framework

Supported in: 4

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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