.NET Framework 4.5.2+
.NET Framework 4.5.2+
.NET Standard 2.0+
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XpoDataSource Class

A collection of persistent objects for ASP.NET controls.

Namespace: DevExpress.Xpo

Assembly: DevExpress.Xpo.v20.2.dll

Declaration

public class XpoDataSource :
    DataSourceControl,
    IXPClassInfoProvider,
    IXPDictionaryProvider
Public Class XpoDataSource
    Inherits DataSourceControl
    Implements IXPClassInfoProvider,
               IXPDictionaryProvider

Remarks

The XpoDataSource component is an XPCollection counterpart for ASP.NET controls. In essence, the XpoDataSource component retrieves persistent objects from a data store and can be bound to a visual data-aware control (for example, ASPxGridView, ASPxNewsControl, ASPxCloudControl, etc.)

When creating an XpoDataSource, you should specify the type of objects to store. To do this, use the XpoDataSource.TypeName property.

Guestbook_XpoDataSource

Link the XpoDataSource to a Session via the XpoDataSource.Session property, so that the data source can access the data store (database) to load and save persistent objects.

Use the XpoDataSource.Criteria property to specify how the collection is filtered during loading on the server side. The criteria expression should comply with Criteria Language Syntax.

using System;
using DevExpress.Xpo;
// ...
Session session1;
protected void Page_Init(object sender, EventArgs e) {
    session1 = new Session();
    XpoDataSource1.Session = session1;
    XpoDataSource1.Criteria = "[Age] > ?";
    XpoDataSource1.CriteriaParameters.Add("Age", TypeCode.Int32, "30");
}

For more information on how to retrieve specific data, see Connecting XPO to a Database Server (ASP.NET).

Inheritance

See Also