Modifies a database query by using a value from specified filter control.
Assembly: System.Web.DynamicData (in System.Web.DynamicData.dll)
Gets or sets the filter control identifier.
Gets the data source object that is associated with the owner control.(Inherited from DataSourceExpression.)
Gets a value that indicates whether a data source expression object is tracking its view state changes.(Inherited from DataSourceExpression.)
Gets the owner control.(Inherited from DataSourceExpression.)
Determines whether the specified object is equal to the current object.(Inherited from Object.)
Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(Inherited from Object.)
Serves as the default hash function. (Inherited from Object.)
Gets the modified query using the current filter value.(Overrides DataSourceExpression.GetQueryable(IQueryable).)
|SetContext(Control, HttpContext, IQueryableDataSource)|
Initializes the expression with data source information.(Overrides DataSourceExpression.SetContext(Control, HttpContext, IQueryableDataSource).)
Returns a string that represents the current object.(Inherited from Object.)
When implemented by a class, loads the previously saved view state of the data source expression object.(Inherited from DataSourceExpression.)
When implemented by a class, gets a value that indicates whether a data source expression object is tracking its view state changes.(Inherited from DataSourceExpression.)
The filter controls in turn delegate the building of the query to the filter template that they reference. The query is then executed by the data source control that is referenced by the QueryExtender control.
To use theclass in a page, you follow these steps:
Add a QueryExtender control to the page.
Set the TargetControlID property of the QueryExtender control to reference the data source control.
Add a QueryExtender control.object as a child of the
Set the ControlID property of theobject to reference the filter control.
In the previous steps it is assumed that the related filter controls, data-bound controls, and data source control are defined in the page.
The following example shows how to use the DynamicFilter control that is identified by control through its ControID property.control to select a filter template in a page. The filter template is selected by the
<asp:QueryExtender ID="QueryExtender1" TargetControlID="GridDataSource" runat="server"> <asp:DynamicFilterExpression ControlID="CategoryFilterID" /> </asp:QueryExtender>
Available since 4.0
Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.