Hey everyone!
I am trying to invoke a CodedWorkflow (Custom.cs) packaged in a nupkg (Custom.nupkg).
I can successfully invoke it as an Activity in the Main.xaml workflow, but it fails in the Main.cs workflow.
The following error occurs for the coded workflow:
Message: Object reference not set to an instance of an object.
Exception Type: System.NullReferenceException
System.NullReferenceException: Object reference not set to an instance of an object. at System.Activities.WorkflowApplication.Invoke(Activity activity, IDictionary`2 inputs, WorkflowInstanceExtensionManager extensions, TimeSpan timeout)
at System.Activities.WorkflowInvoker.Invoke(Activity workflow, TimeSpan timeout, WorkflowInstanceExtensionManager extensions)
......
at System.Activities.Runtime.ActivityExecutor.ExecuteActivityWorkItem.ExecuteBody(ActivityExecutor executor, BookmarkManager bookmarkManager, Location resultLocation)
The related files are as follow:
Custom.cs in nupkg
// import ...
namespace Custom
{
public class Custom : CodedWorkflow
{
[Workflow]
public void Execute()
{
uiAutomation.Open(ObjectRepository.Descriptors.MyApp.MyScreen);
Log("This is a custom activity in Custom.nupkg.");
}
}
}
Main.xaml, it works.
Main.cs, it failed.
// import ...
namespace Main
{
public class Main : CodedWorkflow
{
[Workflow]
public void Execute()
{
WorkflowInvoker.Invoke(new CustomActivity());
}
}
}
I have read the official documentation for creating custom activities, but I can’t proceed because Visual Studio is not available to my team, and services like uiAutomation and system are required for my custom activity.
Actually, I just want to invoke the coded workflow Custom.cs (in the nupkg) in Main.cs. I would be grateful if anyone could help me.