ListBoxExtension.BindToLINQ(Type, String, EventHandler<LinqServerModeDataSourceSelectEventArgs>) Method

Binds the list box to a queryable source in database server mode.

Namespace: DevExpress.Web.Mvc

Assembly: DevExpress.Web.Mvc5.v18.2.dll

Declaration

C#

public ListBoxExtension BindToLINQ(
    Type contextType,
    string tableName,
    EventHandler<LinqServerModeDataSourceSelectEventArgs> selectingMethod
)

VB.NET

Public Function BindToLINQ(
    contextType As Type,
    tableName As String,
    selectingMethod As EventHandler(Of LinqServerModeDataSourceSelectEventArgs)
) As ListBoxExtension

Parameters

Name	Type	Description
contextType	Type	A Type specifying the DataContext type.
tableName	String	A String object specifying the table name.
selectingMethod	EventHandler<LinqServerModeDataSourceSelectEventArgs>	A method to which selection logic is delegated.

Returns

Type	Description
ListBoxExtension	A ListBoxExtension object representing the list box extension.

Remarks

Using the BindToLINQ method, you can easily bind the list box to queryable data sources.

Internally, the BindToLINQ method uses our LinqServerModeDataSource component, which was specifically designed to allow the list box to efficiently process large amounts of data. The LinqServerModeDataSource component automatically enables database server mode to optimize the execution of all LINQ queries initiated by the list box. In this mode, the list box loads records on demand and performs data-aware operations on the data server. This technique significantly improves the list box’s speed and responsiveness.

Note

The current BindToLINQ overload catches and conceals any exception thrown by an IQueryable provider. To catch these exceptions manually, use the BindToLINQ(string contextTypeName, string tableName, EventHandler<LinqServerModeDataSourceSelectEventArgs> selectingMethod, EventHandler<ServerModeExceptionThrownEventArgs> exceptionThrownMethod) overload method.