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.v19.2.Win.dll

Declaration

C#

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

VB.NET

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

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.

Example

Note

The complete sample project WinForms - Dashboard with Extract Data Source is available in the DevExpress Examples repository.

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 void UpdateExtractAsync()
{
    dashboardViewer1.UpdateExtractDataSourcesAsync((a, b) => { OnDataReady(a); }, (a, __) => { MessageBox.Show($"File {a} 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(a, b)
    OnDataReady(a)
  End Sub, Sub(a, __)
    MessageBox.Show($"File {a} 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