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.v20.1.Win.dll

NuGet Packages: DevExpress.Win.Dashboard, DevExpress.WindowsDesktop.Win.Dashboard

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

Example on GitHub: 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 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

Implements

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