Stream SCADA Help

Application Service

Plugins can access application-level functions through _host.Application

C# Example:        

// Check if Application service is available

if (_host?.Application != null)

{

    // Get project folder path

    string appPath = _host.Application.GetAppPath();

    // Example: "C:\Projects\MyScadaProject"

    // Get current Stream user

    string user = _host.Application.GetCurrentStreamUser();

    // Example: "Admin" or "Guest"

    // Get all tag group names

    List<string> groups = _host.Application.GetGroups();

    // Example: ["Tanks", "Pumps", "Valves"]

    foreach (var group in groups)

    {

        Debug.WriteLine($"Group: {group}");

    }

    // Flush historical data for a specific job

    string result = _host.Application.FlushHistorical("HistoricalJob1");

    // Returns: "OK" or error message

    // Acknowledge all active alarms

    string ackResult = _host.Application.AcknowledgeAllAlarms();

    // Returns: "OK" or error message

}

VB.NET Example:

' Check if Application service is available

If _host?.Application IsNot Nothing Then

    ' Get project folder path

    Dim appPath As String = _host.Application.GetAppPath()

    ' Example: "C:\Projects\MyScadaProject"

    ' Get current Stream user

    Dim user As String = _host.Application.GetCurrentStreamUser()

    ' Example: "Admin" or "Guest"

    ' Get all tag group names

    Dim groups As List(Of String) = _host.Application.GetGroups()

    ' Example: ["Tanks", "Pumps", "Valves"]

    For Each group In groups

        Debug.WriteLine($"Group: {group}")

    Next

    ' Flush historical data for a specific job

    Dim result As String = _host.Application.FlushHistorical("HistoricalJob1")

    ' Returns: "OK" or error message

    ' Acknowledge all active alarms

    Dim ackResult As String = _host.Application.AcknowledgeAllAlarms()

    ' Returns: "OK" or error message

End If