DashboardViewer.UpdateExtractDataSourcesAsync(Action<String, ExtractUpdateResult>, Action<String, ExtractUpdateResult>, String[]) Method

Updates the specified extract data sources in the current dashboard asynchronously. Allows you to set custom actions to perform after updating the data and file.

Namespace: DevExpress.DashboardWin

Assembly: DevExpress.Dashboard.v23.2.Win.dll

NuGet Package: DevExpress.Win.Dashboard

Declaration

C#

public Task UpdateExtractDataSourcesAsync(
    Action<string, ExtractUpdateResult> onDataUpdated,
    Action<string, ExtractUpdateResult> onFileUpdated,
    params string[] dataSourceNames
)

VB.NET

Public Function UpdateExtractDataSourcesAsync(
    onDataUpdated As Action(Of String, ExtractUpdateResult),
    onFileUpdated As Action(Of String, ExtractUpdateResult),
    ParamArray dataSourceNames As String()
) As Task

Parameters

Name	Type	Description
onDataUpdated	Action<String, ExtractUpdateResult>	A custom action to perform when the data is updated.
onFileUpdated	Action<String, ExtractUpdateResult>	A custom action to perform when the file is updated.
dataSourceNames	String[]	A list of the data source names.

Returns

Type	Description
Task	The task object that is the asynchronous operation to complete.

Example

View Example: WinForms - Dashboard with Extract Data Source

The following code snippet implements the UpdateExtractAsync method that updates all extract files bound to the dashboard. It displays a message box and reloads DashboardViewer’s data when data is updated, and displays a message box when the extract files are updated.

C#

delegate void SafeUpdate(string file);

private async void UpdateExtractAsync() {
    await dashboardViewer1.UpdateExtractDataSourcesAsync(
        (fileName, result) => { 
            OnDataReady(fileName); 
        },
        (fileName, result) => { 
            MessageBox.Show($"File {fileName} updated "); 
        });
}

void OnDataReady(string fileName) {
    dashboardViewer1.Invoke(new SafeUpdate(UpdateViewer), new object[] { fileName });
}
void UpdateViewer(string fileName) {
    MessageBox.Show($"Data for the file {fileName} is ready ");
    dashboardViewer1.ReloadData();
}

VB.NET

Private Delegate Sub SafeUpdate(ByVal file As String)

Private Sub UpdateExtractAsync()
    dashboardViewer1.UpdateExtractDataSourcesAsync(
        Sub(fileName, result)
            OnDataReady(fileName)
        End Sub,
        Sub(fileName, result)
            MessageBox.Show($"File {fileName} updated ")
        End Sub)
End Sub

Private Sub OnDataReady(ByVal fileName As String)
    dashboardViewer1.Invoke(New SafeUpdate(AddressOf UpdateViewer), New Object() {fileName})
End Sub
Private Sub UpdateViewer(ByVal fileName As String)
    MessageBox.Show($"Data for the file {fileName} is ready ")
    dashboardViewer1.ReloadData()
End Sub

Implements

UpdateExtractDataSourcesAsync(Action<String, ExtractUpdateResult>, Action<String, ExtractUpdateResult>, String[])