CODEWITHSUNDEEP
c#wpfasynchronous
DethoRhyne
DethoRhyne

Reputation: 980

How to make a custom async progress method?

I'm trying to make an async function (I'm not very good with async in general!) and lets say I want it to do this:

async public string Count()
{
    int x = 0;

    for(x; x<100000; x++)
    {
        await Task.Delay(1);
    }

    return "I'm done";
}

I would like to catch that "x" and store it somewhere else, or bind it to a textbox representing progress eg. "x / 100000"

How can I do that?

Upvotes: 1

Views: 144

Answers (1)

bashrc
bashrc

Reputation: 4835

You can create an object of Progress class and pass it to the Count() method. The Progress class has an event handler which can be called every time the async task has some progress to report. The progress is reported by the OnReport method.

var progress = new Progress<int>(); // define your own type or use a builtin type 
progress += (counter) => { //This will be called each time the async func calls Report. 
                          //counter will have the reported value 
                          }


  await Count(progress);

Inside the Count function

async public string Count(Progress<int> progress)
{
 int x = 0;

    for(x; x<100000; x++)
    {
        await Task.Delay(1);
        progress.OnReport(x);
    }

    return "I'm done";
}

Upvotes: 2

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