corelibraries-devexpress-dot-data-dot-odatalinq-dot-odatainstantfeedbacksource.md
Occurs when the ODataInstantFeedbackSource needs a queryable source to retrieve objects from the OData service.
Namespace : DevExpress.Data.ODataLinq
Assembly : DevExpress.Data.v25.2.dll
NuGet Package : DevExpress.Data
public event EventHandler<GetSourceEventArgs> GetSource
Public Event GetSource As EventHandler(Of GetSourceEventArgs)
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. |
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.
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;
}
}
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
The following code snippet (auto-collected from DevExpress Examples) contains a reference to the GetSource event.
Note
The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.
connect-winforms-grid-to-webapi-service/CS/WinForms.Client/MainForm.cs#L12
// This line of code is generated by Data Source Configuration Wizard
this.oDataInstantFeedbackSource1.GetSource += oDataInstantFeedbackSource1_GetSource;
// This line of code is generated by Data Source Configuration Wizard
See Also
ODataInstantFeedbackSource Class