How to Convert Variable<int> to int?

Question

Does anybody know how to convert a Variable<int> variable to int?

Thanks in advance

Answer 1

It seems that I can use the Get method of my variable but it asks for ActivityContext. Any clues how to retrieve that on the code bellow??

 

List<Task> tasks = GetTasks();

            var contador = new Variable<int>("contador", 0);
            
            string sCondition = "contador < " + tasks.Count.ToString();

            var vbvalue = new VisualBasicValue<int>("contador");

            While whileActivity = new While
            {
                Variables = { contador },
                DisplayName = "WhileCriaTarefa",
                Condition = new VisualBasicValue<bool>(sCondition),
                Body = new Sequence
                {
                    DisplayName = "SequenceCriaTarefa",
                    Activities = 
                    {  
                         new CreateTaskActivity(tasks[contador.Get(????????)]),
                         new Assign<int>
                         {
                              DisplayName = "Incrementa o contador",
                              To=contador,
                              Value = new VisualBasicValue<int>("contador + 1")
                         },
                         new WriteLine
                         {
                               Text= new VisualBasicValue<string>("cstr(contador)")
                         }
                    }
                }
            };

            lstActivities.Add(whileActivity);

Answer 2

Hi,

It can be done by using expression:

new CreateTaskActivity(env=>tasks.Get(env)[contador.Get(env)]),

Below is an article about data in Workflow 4, for your reference:

Data and Windows Workflow Foundation 4

http://msmvps.com/blogs/theproblemsolver/archive/2009/07/20/data-and-windows-workflow-foundation-4.aspx

Thanks.

 

---

Leo Tang [MSFT]
MSDN Community Support | Feedback to us
Get or Request Code Sample from Microsoft
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Answer 3

Thanks for the reply.

It didn't work, here is the code for my CreateTaskActivity. There is no Get Method in my class. Should I implement it myself?

Thank you again

public class CreateTaskActivity : Activity
    {
        public CreateTaskActivity(Task task)
        {
            DataModelDataContext context = new DataModelDataContext();
            context.Tasks.InsertOnSubmit(new Task() { AssignedTo = task.AssignedTo, Title = task.Title, StartDate = task.StartDate, DueDate = task.DueDate });
            context.SubmitChanges();
        }
    }

Answer 4

Hi,

I'd suggest you use required argument in your custom activity. Since your custom activity is not a composite activity, it can derive from CodeActivity.

public class CreateTaskActivity : CodeActivity
{
[RequiredArgument]
public InArgument<Task> _task { get; set; }

protected override void Execute(CodeActivityContext context)
{
// Obtain the runtime value of the task input argument
Task task = context.GetValue(this._task);

DataModelDataContext _context = new DataModelDataContext();

_context.Tasks.InsertOnSubmit(new Task() { AssignedTo = task.AssignedTo, Title = task.Title, StartDate = task.StartDate, DueDate = task.DueDate });
_context.SubmitChanges();
}
}

Then the code about CreateTaskActivity in your original post will be:

new CreateTaskActivity()
{
task=new InArgument<task>(env=>tasks[contador.Get(env)])
},

Thanks.

---

Leo Tang [MSFT]
MSDN Community Support | Feedback to us
Get or Request Code Sample from Microsoft
Please remember to mark the replies as answers if they help and unmark them if they provide no help.

Answer 5

Thank you for your answer, that works like a charm

Rafael