callback based async method with multiple parameters to awaitabletask

Question

I have the following code to connect to MYOB's SDK

    var cfsCloud = new CompanyFileService(_configurationCloud, null, _oAuthKeyService);
    cfsCloud.GetRange(OnComplete, OnError);

where

private  void OnComplete(HttpStatusCode statusCode, CompanyFile[] companyFiles)
    {  // ask for credentials etc }

I want to convert this to use a TaskCompletionSource like this example

however my OnComplete has multiple parameters. How do I code that?

The [SDK](https://www.nuget.org/packages/MYOB.AccountRight.API.SDK/) for Accountright API supports async/await i.e. [GetRangeAsync](https://github.com/MYOB-Technology/AccountRight_Live_API_.Net_SDK/blob/master/MYOB.API.SDK/SDK/Services/CompanyFileService.cs#L53) — Shaun Wilde, Sep 01 '15 at 23:49
Augh! I have tripped up on that before. Care to put it as the answer? — Kirsten, Sep 02 '15 at 00:32

score 2 · Accepted Answer · answered Sep 02 '15 at 01:25

2

As mentioned in the comment

The SDK for Accountright API supports async/await i.e. GetRangeAsync

so you can do something like this if you wanted/needed to wrap it in a TaskCompletionSource

static Task<CompanyFile[]> DoWork()
{
    var tcs = new TaskCompletionSource<CompanyFile[]>();
    Task.Run(async () =>
    {
        var cfsCloud = new CompanyFileService(_configurationCloud, null, _oAuthKeyService);
        var files = await cfsCloud.GetRangeAsync();
        tcs.SetResult(files);
    });
    return tcs.Task;
}

answered Sep 02 '15 at 01:25

Shaun Wilde

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except the CompanyFileService parameters need to be added as parameters to DoWork because the method is static. – Kirsten Sep 02 '15 at 16:11
1

@kirsteng - you can easily remove the `static` – Shaun Wilde Sep 02 '15 at 21:32
1

Shaun and @kirsteng, if you wrap it like this, you should also handle exceptions inside this async lambda and use `TCS.SetException`. Otherwise they may go lost. – noseratio Sep 04 '15 at 01:03
2

@Noseratio - you are right but this was just an example to point him in the right direction – Shaun Wilde Sep 04 '15 at 09:17

callback based async method with multiple parameters to awaitabletask

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