SqlWorkflowInstanceStore.InstanceEncodingOption Eigenschaft

Definition

Namespace:

System.Activities.DurableInstancing

Assembly:

System.Activities.DurableInstancing.dll

Gibt einen Wert an, der angibt, ob die Instanzdaten komprimiert werden müssen.

public:
 property System::Activities::DurableInstancing::InstanceEncodingOption InstanceEncodingOption { System::Activities::DurableInstancing::InstanceEncodingOption get(); void set(System::Activities::DurableInstancing::InstanceEncodingOption value); };

public System.Activities.DurableInstancing.InstanceEncodingOption InstanceEncodingOption { get; set; }

member this.InstanceEncodingOption : System.Activities.DurableInstancing.InstanceEncodingOption with get, set

Public Property InstanceEncodingOption As InstanceEncodingOption

Eigenschaftswert

InstanceEncodingOption

Die möglichen Werte sind "None" und "GZip". Der Standardwert ist „None“.

Beispiele

Das folgende Codebeispiel zeigt die Verwendung von InstanceEncodingOption in einem SqlWorkflowInstanceStore.

static void Main(string[] args)
{
    // Create service host.
    WorkflowServiceHost host = new WorkflowServiceHost(new CountingWorkflow(), new Uri(hostBaseAddress));

    // Add service endpoint.
    host.AddServiceEndpoint("ICountingWorkflow", new BasicHttpBinding(), "");

    // Define SqlWorkflowInstanceStoreBehavior:
    //   Set interval to renew instance lock to 5 seconds.
    //   Set interval to check for runnable instances to 2 seconds.
    //   Instance Store does not keep instances after it is completed.
    //   Select exponential back-off algorithm when retrying to load a locked instance.
    //   Instance state information is compressed using the GZip compressing algorithm.
    SqlWorkflowInstanceStoreBehavior instanceStoreBehavior = new SqlWorkflowInstanceStoreBehavior(connectionString);
    instanceStoreBehavior.HostLockRenewalPeriod = new TimeSpan(0, 0, 5);
    instanceStoreBehavior.RunnableInstancesDetectionPeriod = new TimeSpan(0, 0, 2);
    instanceStoreBehavior.InstanceCompletionAction = InstanceCompletionAction.DeleteAll;
    instanceStoreBehavior.InstanceLockedExceptionAction = InstanceLockedExceptionAction.AggressiveRetry;
    instanceStoreBehavior.InstanceEncodingOption = InstanceEncodingOption.GZip;
    host.Description.Behaviors.Add(instanceStoreBehavior);

    // Open service host.
    host.Open();

    // Create a client that sends a message to create an instance of the workflow.
    ICountingWorkflow client = ChannelFactory<ICountingWorkflow>.CreateChannel(new BasicHttpBinding(), new EndpointAddress(hostBaseAddress));
    client.start();

    Console.WriteLine("(Press [Enter] at any time to terminate host)");
    Console.ReadLine();
    host.Close();
}

Hinweise

Wenn der Wert auf "GZip" festgelegt ist, werden die Instanzdaten mithilfe des GZip-Algorithmus komprimiert.