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XpoDataSource Class

A collection of persistent objects for ASP.NET controls.

Namespace: DevExpress.Xpo

Assembly: DevExpress.Xpo.v19.1.dll

Declaration

[ToolboxTabName("DX.19.1: ORM Components")]
[ToolboxBitmap(typeof(XpoDataSource), "XPODataSource.bmp")]
public class XpoDataSource :
    DataSourceControl,
    IXPClassInfoProvider,
    IXPDictionaryProvider
<ToolboxTabName("DX.19.1: ORM Components")>
<ToolboxBitmap(GetType(XpoDataSource), "XPODataSource.bmp")>
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 (e.g. 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

Then, link the XpoDataSource to a session, which will be used to load and save persistent objects to a data store, via the XpoDataSource.Session property. For recommendations on how to create/destroy sessions, see Tutorial 6 - A Simple Guestbook (ASP.NET).

Use the XpoDataSource.Criteria property to change the criteria by which persistent objects will be filtered during collection loading on the server side.


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