WcfServerModeSource Class

The data source for the GridControl and SearchLookUpEdit controls that binds these controls to a WCF Data Service in Server Mode.

Namespace: DevExpress.Data.WcfLinq

Assembly: DevExpress.Data.v24.1.dll

NuGet Package: DevExpress.Data

Declaration

C#

[ToolboxBitmap(typeof(ResFinder), "Bitmaps256.WcfServerModeSource.bmp")]
[ToolboxTabName("DX.24.1: Data & Analytics")]
public class WcfServerModeSource :
    Component,
    IListSource,
    ISupportInitialize,
    IWcfServerModeFrontEndOwner,
    IDXCloneable,
    IXtraSourceError

VB.NET

<ToolboxBitmap(GetType(ResFinder), "Bitmaps256.WcfServerModeSource.bmp")>
<ToolboxTabName("DX.24.1: Data & Analytics")>
Public Class WcfServerModeSource
    Inherits Component
    Implements IListSource,
               ISupportInitialize,
               IWcfServerModeFrontEndOwner,
               IDXCloneable,
               IXtraSourceError

Remarks

Server mode allows a data-aware control to rapidly work with large datasets. Loading records in small portions on demand and performing data-aware operations on the data server side are the key features of server mode. When the control needs to display a specific portion of data, it calls a specific method of the bound server mode data source. This method sends a corresponding request to the data store, and upon receiving the results, passes them back to the control. The WcfServerModeSource component implements the IListSource interface, and can be used as a data source for a control supporting the server mode feature.

Use WcfServerModeSource to bind a server-mode enabled control to a WCF Data Service. Specify the type of objects contained in the query result using the WcfServerModeSource.ElementType property. Specify the required query request to a WCF Data Service via the WcfServerModeSource.Query property. Bind the control to the WcfServerModeSource component.

C#

public MainWindow() {
    InitializeComponent();
    grid.DataSource = new WcfServerModeSource() {        
        KeyExpression = "CustomerID",
        Query = myDataServiceContext.Customers
    };
}

VB.NET

Public Sub New()
    InitializeComponent()
    grid.DataSource = New WcfServerModeSource() With { _
    .KeyExpression = "CustomerID", _
    .Query = myDataServiceContext.Customers}
End Sub

You can see a detailed example in the How to use the WcfServerModeSource component as a data source article.

Note

WcfServerModeSource is a read-only data source.

Inheritance

Object

MarshalByRefObject

Component

WcfServerModeSource