Question

我尝试使用Windows工作流基础构建一个asp.net Web应用程序。

我找到了一些有用的网站，如：

http://msdn.microsoft.com/en-us/library/bb628441%28v=vs.90%29.aspx

http://msdn.microsoft.com/en-us/library/bb675262%28v=vs.90%29.aspx

工作流程是一个活动

<Activity mc:Ignorable="sap" x:Class="ApproachWithWorkflows.WriteLineActivity" sap:VirtualizedContainerService.HintSize="654,676" mva:VisualBasic.Settings="Assembly references and imported namespaces for internal implementation" xmlns="http://schemas.microsoft.com/netfx/2009/xaml/activities" xmlns:av="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:mv="clr-namespace:Microsoft.VisualBasic;assembly=System" xmlns:mva="clr-namespace:Microsoft.VisualBasic.Activities;assembly=System.Activities" xmlns:s="clr-namespace:System;assembly=mscorlib" xmlns:s1="clr-namespace:System;assembly=System" xmlns:s2="clr-namespace:System;assembly=System.Xml" xmlns:s3="clr-namespace:System;assembly=System.Core" xmlns:sad="clr-namespace:System.Activities.Debugger;assembly=System.Activities" xmlns:sap="http://schemas.microsoft.com/netfx/2009/xaml/activities/presentation" xmlns:scg="clr-namespace:System.Collections.Generic;assembly=System" xmlns:scg1="clr-namespace:System.Collections.Generic;assembly=System.ServiceModel" xmlns:scg2="clr-namespace:System.Collections.Generic;assembly=System.Core" xmlns:scg3="clr-namespace:System.Collections.Generic;assembly=mscorlib" xmlns:sd="clr-namespace:System.Data;assembly=System.Data" xmlns:sl="clr-namespace:System.Linq;assembly=System.Core" xmlns:st="clr-namespace:System.Text;assembly=mscorlib" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<Flowchart sad:XamlDebuggerXmlReader.FileName="C:\Documents and Settings\hauke\Desktop\Uni\Masterarbeit SVN SE\Software\Workflowansatz\ApproachWithWorkflows\ApproachWithWorkflows\WriteLineActivity.xaml" sap:VirtualizedContainerService.HintSize="614,636">
<sap:WorkflowViewStateService.ViewState>
  <scg3:Dictionary x:TypeArguments="x:String, x:Object">
    <x:Boolean x:Key="IsExpanded">False</x:Boolean>
    <av:Point x:Key="ShapeLocation">270,2.5</av:Point>
    <av:Size x:Key="ShapeSize">60,75</av:Size>
    <av:PointCollection x:Key="ConnectorLocation">300,77.5 300,107.5 295.5,107.5 295.5,129</av:PointCollection>
  </scg3:Dictionary>
</sap:WorkflowViewStateService.ViewState>
<Flowchart.StartNode>
  <x:Reference>__ReferenceID0</x:Reference>
</Flowchart.StartNode>
<FlowStep x:Name="__ReferenceID0">
  <sap:WorkflowViewStateService.ViewState>
    <scg3:Dictionary x:TypeArguments="x:String, x:Object">
      <av:Point x:Key="ShapeLocation">190,129</av:Point>
      <av:Size x:Key="ShapeSize">211,59</av:Size>
    </scg3:Dictionary>
  </sap:WorkflowViewStateService.ViewState>
  <WriteLine sap:VirtualizedContainerService.HintSize="211,59" Text="worked.." />
</FlowStep>

我用一个简单的按钮创建了一个asp.net项目：

<asp:Button Text="Purchase" ID="Label1" runat="server" OnClick="btnClick" />

在后面的代码中，我尝试调用工作流（并通过Application_Start在global.asax中初始化WorkflowRuntime）：

WorkflowRuntime workflowRuntime = Application["WorkflowRuntime"] as WorkflowRuntime;
ManualWorkflowSchedulerService manualScheduler =
    workflowRuntime.GetService(typeof(ManualWorkflowSchedulerService))
    as ManualWorkflowSchedulerService;

WorkflowInstance instance = workflowRuntime.CreateWorkflow(
    typeof(ApproachWithWorkflows.WriteLineActivity));
instance.Start();
manualScheduler.RunWorkflow(instance.InstanceId);

当我现在执行应用程序并按下按钮时，我在CreateWorkflow上收到类似“输入工作流类型必须是活动。\ r \ nParameter name：workflowType”的错误。

但是活动是一项活动！我做错了什么？

Answer 1

看起来您正在使用WF 3.5运行时类来执行WF 4.0活动。看一下WorkflowInvoker或WorkflowApplication。

使用ASP.NET与Windows工作流基础

1 个答案: