ArcGIS Pro 3.1 API Reference Guide
ArcGIS.Desktop.Mapping Namespace / StreamLayer Class / GetExpirationMethod Method
Example

In This Topic
    GetExpirationMethod Method (StreamLayer)
    In This Topic
    Gets the current expiration method. This method must be called on the MCT. Use QueuedTask.Run.
    Syntax
    public FeatureExpirationMethod GetExpirationMethod()
    Public Function GetExpirationMethod() As FeatureExpirationMethod

    Return Value

    Exceptions
    ExceptionDescription
    This method or property must be called within the lambda passed to QueuedTask.Run.
    Stream service data connection is null.
    Example
    Set the Maximum Count of Previous Observations to be Stored in Memory
    //Must be on QueuedTask
    //Set Expiration Method and Max Expiration Count
    if (streamLayer.GetExpirationMethod() != FeatureExpirationMethod.MaximumFeatureCount)
      streamLayer.SetExpirationMethod(FeatureExpirationMethod.MaximumFeatureCount);
    streamLayer.SetExpirationMaxCount(15);
    //FYI
    if (streamLayer.IsTrackAware)
    {
      //MaxCount is per track! otherwise for the entire layer
    }
    
    Set the Maximum Age of Previous Observations to be Stored in Memory
    //Must be on QueuedTask
    //Set Expiration Method and Max Expiration Age
    if (streamLayer.GetExpirationMethod() != FeatureExpirationMethod.MaximumFeatureAge)
      streamLayer.SetExpirationMethod(FeatureExpirationMethod.MaximumFeatureAge);
    //set to 12 hours (max is 24 hours)
    streamLayer.SetExpirationMaxAge(new TimeSpan(12,0,0));
    
    //FYI
    if (streamLayer.IsTrackAware)
    {
      //MaxAge is per track! otherwise for the entire layer
    }
    
    Requirements

    Target Platforms: Windows 11, Windows 10

    ArcGIS Pro version: 3.0 or higher.
    See Also