ODataInstantFeedbackSource.GetSource Event

Occurs when the ODataInstantFeedbackSource needs a queryable source to retrieve objects from the OData service.

Namespace: DevExpress.Data.ODataLinq

Assembly: DevExpress.Data.v23.2.dll

NuGet Package: DevExpress.Data

Declaration

C#

public event EventHandler<GetSourceEventArgs> GetSource

VB.NET

Public Event GetSource As EventHandler(Of GetSourceEventArgs)

Event Data

The GetSource event's data class is GetSourceEventArgs. The following properties provide information specific to this event:

Property	Description
AreSourceRowsThreadSafe	Specifies whether elements retrieved by the ODataInstantFeedbackSource‘s queryable source are thread-safe.
Extender	This property is intended for internal use.
KeyExpressions	Gets or sets the name of the key property.
Properties
Query	Specifies the query request to the OData service.
Tag	Gets or sets an arbitrary object associated with a queryable source.

Remarks

Handle this event to supply a queryable source connected to the required OData service. The GetSourceEventArgs class exposes the GetSourceEventArgs.Tag property, which you can use to specify an arbitrary object. This object will be passed along with the GetSourceEventArgs.Query property to the ODataInstantFeedbackSource.DismissSource event handler.

C#

public partial class Form1 : Form {
    private void Form1_Load(object sender, EventArgs e) {
        oDataInstantFeedbackSource1.KeyExpression = "CustomerID";
        oDataInstantFeedbackSource1.GetQueryable += oDataInstantFeedbackSource1_GetSource;
        gridControl1.DataSource = oDataInstantFeedbackSource1;
    }
    void oDataInstantFeedbackSource1_GetSource(object sender, GetSourceEventArgs e) {
        // DataServiceContext myDataServiceContext = ...
        e.Query = myDataServiceContext.Customers;
    }
}

VB.NET

Partial Public Class Form1
    Inherits Form
    Private Sub Form1_Load(ByVal sender As Object, ByVal e As EventArgs)
        oDataInstantFeedbackSource1.KeyExpression = "CustomerID"
        AddHandler oDataInstantFeedbackSource1.GetQueryable, AddressOf oDataInstantFeedbackSource1_GetSource
        gridControl1.DataSource = oDataInstantFeedbackSource1
    End Sub
    Private Sub oDataInstantFeedbackSource1_GetSource(ByVal sender As Object, ByVal e As GetSourceEventArgs)
        ' DataServiceContext myDataServiceContext = ...
        e.Query = myDataServiceContext.Customers
    End Sub
End Class