XPQueryExtensions.Query<T>(IDataLayer) Method

Creates a new XPQuery<T> instance from a specified session’s scope.

Namespace: DevExpress.Xpo

Assembly: DevExpress.Xpo.v24.1.dll

NuGet Packages: DevExpress.Win.PivotGrid, DevExpress.Win.TreeMap, DevExpress.Xpo

NuGet Package: DevExpress.Xpo

Declaration

C#

public static XPQuery<T> Query<T>(
    this IDataLayer layer
)

VB.NET

<ExtensionAttribute>
Public Shared Function Query(Of T)(
    layer As IDataLayer
) As XPQuery(Of T)

Parameters

Name	Type	Description
layer	IDataLayer	An IDataLayer object specifying the data access layer.

Type Parameters

Name
T

Returns

Type	Description
XPQuery<T>	An XPQuery<T> object instantiated from the session‘s scope.

Remarks

Example:

C#

using System.Linq;
using DevExpress.Xpo;

// ...

var data = from c in session1.Query<Person>()
           where c.LastName.StartsWith("A")
           select c;

VB.NET

'NOTE: This code snippet uses implicit typing. 
'You will need to set 'Option Infer On' in the VB file or set 'Option Infer' at the project level:

Imports System.Linq
Imports DevExpress.Xpo

' ...

Private data = from c in session1.Query(Of Person)() where c.LastName.StartsWith("A") select c