語言

WorkflowHostingEndpoint.OnGetInstanceId(Object[], OperationContext) 方法

定義

命名空間:
System.ServiceModel.Activities
組件:
System.ServiceModel.Activities.dll

覆寫以回傳正在建立工作流程實例的實例 ID。

protected public:
 virtual Guid OnGetInstanceId(cli::array <System::Object ^> ^ inputs, System::ServiceModel::OperationContext ^ operationContext);
protected internal virtual Guid OnGetInstanceId(object[] inputs, System.ServiceModel.OperationContext operationContext);
abstract member OnGetInstanceId : obj[] * System.ServiceModel.OperationContext -> Guid
override this.OnGetInstanceId : obj[] * System.ServiceModel.OperationContext -> Guid
Protected Friend Overridable Function OnGetInstanceId (inputs As Object(), operationContext As OperationContext) As Guid

參數

inputs
Object[]

服務操作的輸入。

operationContext
OperationContext

服務操作的操作背景。

傳回

Guid

新建立工作流程實例的實例 ID。

範例

以下範例說明如何實作此 OnGetInstanceId 方法。

protected override Guid OnGetInstanceId(object[] inputs, OperationContext operationContext)
{
    //Create was called by client
    if (operationContext.IncomingMessageHeaders.Action.EndsWith("Create"))
    {
        return Guid.Empty;
    }
    //CreateWithInstanceId was called by client
    else if (operationContext.IncomingMessageHeaders.Action.EndsWith("CreateWithInstanceId"))
    {
        return (Guid)inputs[1];
    }
    else
    {
        throw new InvalidOperationException("Invalid Action: " + operationContext.IncomingMessageHeaders.Action);
    }
}

備註

回傳 null 表示應自動產生實例 ID。

適用於