Question

当我在其中使用其他工作流程时，我以动态方式加载工作流XAML时出现问题。

我的主要工作流程 - MainWorkflow.xaml。在另一个工作流程内 - SubWorkflow.xaml 在运行时当我加载Main.xaml时出现以下错误：

{"CacheMetadata for activity 'FlowManager.Flows.MainWorkflow' through 'System.Xaml.XamlObjectWriterException: Cannot create unknown type '{clr-namespace:FlowManager.Flows}SubWorkflow'

加载工作流程的代码：

public object Load(Dictionary<string, object> inputs)
{
    object returnValue = null;

    ActivityXamlServicesSettings settings = new ActivityXamlServicesSettings
    {
        //since the workflow contains expression, the following flag must be set to true
        CompileExpressions = true
    };


    WorkflowApplication wfApp =
        new WorkflowApplication(
            ActivityXamlServices.Load(Path, settings), inputs)
        {
            Completed = delegate (WorkflowApplicationCompletedEventArgs e)
            {
                returnValue = e.Outputs["returnValue"];
                syncEvent.Set();
            },
            Idle = delegate (WorkflowApplicationIdleEventArgs e) { idleEvent.Set(); }                    
    };

    wfApp.Run();
    syncEvent.WaitOne();
    return returnValue;
}

通过创建Main的实例而不是通过加载XAML来更改工作流的加载，完美地运行

        WorkflowApplication wfApp =
            new WorkflowApplication(new MainWorkflow(), inputs)

任何想法我如何解决这个问题？

Answer 1

找到答案，需要使用XamlXmlReaderSettings对象添加程序集引用

    var xamlReaderSettings = new XamlXmlReaderSettings()
    {
        LocalAssembly = typeof(GetVmIp).Assembly
    };
    var reader = new XamlXmlReader(Path, xamlReaderSettings);


    WorkflowApplication wfApp =
        new WorkflowApplication(
            ActivityXamlServices.Load(reader, settings), inputs)

它有效。

在主工作流程内使用子工作流程

1 个答案: