SqlWorkflowInstanceStore.Promote 方法

定义

命名空间:

System.Activities.DurableInstancing

程序集:

System.Activities.DurableInstancing.dll

将指定的属性与工作流实例相关联，以便能够基于这些属性的特定值查询实例。 可在外部查询中使用的这些属性可以是简单的类型（例如：Int64、String 等），也可以是序列化的二进制类型 (byte[])。 二进制属性通常用于存储跟踪数据。

public:
 void Promote(System::String ^ name, System::Collections::Generic::IEnumerable<System::Xml::Linq::XName ^> ^ promoteAsVariant, System::Collections::Generic::IEnumerable<System::Xml::Linq::XName ^> ^ promoteAsBinary);

public void Promote (string name, System.Collections.Generic.IEnumerable<System.Xml.Linq.XName> promoteAsVariant, System.Collections.Generic.IEnumerable<System.Xml.Linq.XName> promoteAsBinary);

member this.Promote : string * seq<System.Xml.Linq.XName> * seq<System.Xml.Linq.XName> -> unit

Public Sub Promote (name As String, promoteAsVariant As IEnumerable(Of XName), promoteAsBinary As IEnumerable(Of XName))

参数

name

String

提升本身的名称。

promoteAsVariant

IEnumerable<XName>

必须以变体形式提升的属性。

promoteAsBinary

IEnumerable<XName>

必须以二进制流形式提升的属性。

注解

示例

下面的代码示例演示如何在 SqlWorkflowInstanceStore 中使用 Promote。

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

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

    // Define SqlWorkflowInstanceStore and assign it to host.
    SqlWorkflowInstanceStoreBehavior store = new SqlWorkflowInstanceStoreBehavior(connectionString);
    List<XName> variantProperties = new List<XName>()
    {
        xNS.GetName("Count")
    };
    store.Promote("CountStatus", variantProperties, null);

    host.Description.Behaviors.Add(store);

    host.WorkflowExtensions.Add<CounterStatus>(() => new CounterStatus());
    host.Open(); // This sample needs to be run with Admin privileges.
                 // Otherwise the channel listener is not allowed to open ports.
                 // See sample documentation for details.

    // 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();
}