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Using Window WF [IF-ELSE ACTIVITY] with Managed VC

Due to change in server, I lost almost one month blog data (some of the WF posts also). Anyways here again I am posting it again, this time writing WF library in C# and running it using managed C++.

Program topic: - According to latest guidelines by Government of India “Hard drinks would be served only to person equal or above 25 years”. So our WF application will ask incoming guest there AGE and respond accordingly!

Create C# based Sequential Workflow Library, something like this:-

After selecting the project name, following window will open:-

Now put Code activity and name it as CA_EnterAge and then add IF-ELSE activity, also add two code activity into the IF-ELSE activity for each true and false condition and name CA_AgeAbove25 and CA_AgeBelow25 activity respectivly. The workflow now look likes this:-

Now, place following code into Workflow source file after generating function for each code activity:-

public sealed partial class Workflow1: SequentialWorkflowActivity
 {
  public Workflow1()
  {
   InitializeComponent();
  }
      
        private bool _AgeBarrierOk = false;
        public bool AgeBarrierOk
        {
            get { return _AgeBarrierOk; }
            set { _AgeBarrierOk = value; }
        }

    private void CA_EnterAge_ExecuteCode(object sender, EventArgs e)
    {
            Console.WriteLine("Welcome to Beer Bar");
            Console.WriteLine("Before choosing drink, Enter your Age:");

            string sLine = Console.ReadLine();
            int iAge = 0;
            int.TryParse(sLine, out iAge);

    if (iAge >= 25) { AgeBarrierOk = true; } else AgeBarrierOk = false;
    }

   private void CA_AgeAbove25_ExecuteCode(object sender, EventArgs e)
   {
            Console.WriteLine("Welcome, you allowed to take drinks");
   }

    private void CA_AgeBelow25_ExecuteCode(object sender, EventArgs e)
        {
            Console.WriteLine("Sorry, you haven't crossed harddrink age limit");
            Console.WriteLine("You can only have Softdrink or Juice");
        }
 }

Now add declarative rule condition for IF-ELSE activity for selecting true or false branch. Something like this:-

If you see in snapshot I am using Boolean variable AgeBarrierOk to check whether to select TRUE branch or FALSE branch. Now compile and remove any compiler errors.
Now Add CLR Console based project into our project, add reference of the library and Workflow assemblies.

Following code snippet will cater/manage our workflow:-

using namespace System;
using namespace System::Threading;
using namespace System::Workflow::Runtime;
using namespace System::Workflow::Runtime::Hosting;
using namespace SeqIFElseLibrary;
ref class WorkflowRunner
{
 static AutoResetEvent ^waitHandle = gcnew AutoResetEvent(false);
 WorkflowRuntime ^workflowRuntime;
public:

 WorkflowRunner()
 {
    workflowRuntime = gcnew WorkflowRuntime();
 }

 void RunWorkflow()
 {
  Type^ t = Workflow1::typeid;

  workflowRuntime->WorkflowCompleted +=
gcnew EventHandler<WorkflowCompletedEventArgs^>(&WorkflowRunner::OnWorkflowCompleted);

  WorkflowInstance^ instance = workflowRuntime->CreateWorkflow(t);
  instance->Start();
  
  waitHandle->WaitOne();
 }

 static void OnWorkflowCompleted(Object ^ Sender,WorkflowCompletedEventArgs^ e)
 {
  waitHandle->Set();
 }

};

int main(array<System::String ^> ^args)
{
 WorkflowRunner^ wfr = gcnew WorkflowRunner();
 wfr->RunWorkflow(); 
 return 0;
}

Output [TRUE Condition]:-

Welcome to Beer Bar
Before choosing drink, Enter your Age:
28
Welcome, you allowed to take drinks

Output [FALSE Condition]:-

Welcome to Beer Bar
Before choosing drink, Enter your Age:
21
Sorry, you haven't crossed harddrink age limit
You can only have Softdrink or Juice

Download code Visualcpp_org_IFELSE_Act.zip