wpf-devexpress-dot-xpf-dot-grid-dot-dataviewbase-c8eb1a78.md
Occurs before the data source is refreshed (a user presses F5 or executes the RefreshDataSource command) and allows you to implement custom refresh logic.
Namespace : DevExpress.Xpf.Grid
Assembly : DevExpress.Xpf.Grid.v25.2.Core.dll
NuGet Package : DevExpress.Wpf.Grid.Core
public event EventHandler<DataSourceRefreshEventArgs> DataSourceRefresh
Public Event DataSourceRefresh As EventHandler(Of DataSourceRefreshEventArgs)
The DataSourceRefresh event's data class is DataSourceRefreshEventArgs. The following properties provide information specific to this event:
| Property | Description |
|---|---|
| Handled | Gets or sets a value that indicates the present state of the event handling for a routed event as it travels the route. Inherited from RoutedEventArgs. |
| OriginalSource | Gets the original reporting source as determined by pure hit testing, before any possible Source adjustment by a parent class. Inherited from RoutedEventArgs. |
| RefreshAsync | Gets or sets a task that implements custom refresh logic. |
| RoutedEvent | Gets or sets the RoutedEvent associated with this RoutedEventArgs instance. Inherited from RoutedEventArgs. |
| Source | Gets or sets a reference to the object that raised the event. Inherited from RoutedEventArgs. |
The event data class exposes the following methods:
| Method | Description |
|---|---|
| InvokeEventHandler(Delegate, Object) | When overridden in a derived class, provides a way to invoke event handlers in a type-specific way, which can increase efficiency over the base implementation. Inherited from RoutedEventArgs. |
| OnSetSource(Object) | When overridden in a derived class, provides a notification callback entry point whenever the value of the Source property of an instance changes. Inherited from RoutedEventArgs. |
You can implement CRUD operations (create, read update, delete). These operations allow users to manage data in the Data Grid. Refer to the following topic for more information: Implement CRUD Operations in a Data-Bound Grid.
View Example: How to Implement CRUD Operations in a Data-Bound Grid
The following code snippets (auto-collected from DevExpress Examples) contain references to the DataSourceRefresh 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.
wpf-data-grid-implement-crud-operations/CS/CodeBehind/EFCore/PagedAsyncSource/MainWindow.xaml#L23
<dxg:TableView ShowUpdateRowButtons="OnCellEditorOpen" ValidateRow="OnValidateRow"
ShowFixedTotalSummary="True" DataSourceRefresh="OnDataSourceRefresh" />
</dxg:GridControl.View>
wpf-data-grid-extend-crud-operations/CS/Undo/UndoCRUDOperationsBehavior.cs#L44
AssociatedObject.RowEditStarted += OnEditingStarted;
AssociatedObject.DataSourceRefresh += OnRefresh;
AssociatedObject.InitNewRow += OnNewRowStarted;
wpf-data-grid-extend-crud-operations/VB/Undo/UndoCRUDOperationsBehavior.vb#L70
AddHandler AssociatedObject.RowEditStarted, AddressOf OnEditingStarted
AddHandler AssociatedObject.DataSourceRefresh, AddressOf OnRefresh
AddHandler AssociatedObject.InitNewRow, AddressOf OnNewRowStarted
See Also