At a guess, it's to do with timing.
You could be returning your list f from your function before the Async
network call has occurred.
To get around this, change your method from:
private List<string> DoThis()
to:
private void DoThisAndCallMeBack(Action<List<string>> callback)
And then modify the return statements to callback calls:
List<string> f = new List<string>();
if (checkForNetwork(true) != true)
{
f.Add("No network available");
callback(f);
return;
}
List<Upcoming> tableData = new List<Upcoming>();
POHWS.webservice.Service1 Service3 = new
POHWS.webservice.Service1();
try
{
Service3.BeginGetUpcoming(**track, delegate(IAsyncResult
iar)
{
tableData = Service3.EndGetUpcoming(iar).**ToList();
Android.App.Application.**
SynchronizationContext.Post(**delegate
{
if (tableData.Count == 0)
{
tableData[0].PostTime = "No data from the
webservice";
}
f.Add(tableData[0].PostTime);
Console.WriteLine("f[0] = {0}", f[0]);
callback (f);
}, null);
}, null);
}
catch (Exception oe)
{
f.Add(oe.ToString());
callback(f);
}
You might also need to marshall the callback calls on to the UI thread
Hope that works and helps
Stuart
On 2 March 2012 02:29, Paul Johnson <[email protected]> wrote:
> Hi,
>
> This is probably down to me being a klutz, but can anyone spot why nothing
> is being returned? The Console.WriteLine is showing that something is being
> added to the list. I'm guessing a scope problem...
>
> (calling routine)
> case 1:
> List<string> race = new List<string>();
> currentview.**SetBackgroundDrawable(**
> Resources.GetDrawable(**Resource.Drawable.Back_**BobMoore));
> text.Text = Resources.GetString(Resource.**
> String.ComingSoon);
> webservice_user getRace = new webservice_user();
> race = getRace.getUpcomingRaces("**
> fairmeadowsUpcoming");
> races = race.ToArray();
> break;
>
> (webservice)
> List<string> f = new List<string>();
> if (checkForNetwork(true) != true)
> {
> f.Add("No network available");
> return f;
> }
> else
> {
> List<Upcoming> tableData = new List<Upcoming>();
> POHWS.webservice.Service1 Service3 = new
> POHWS.webservice.Service1();
>
> try
> {
> Service3.BeginGetUpcoming(**track,
> delegate(IAsyncResult iar)
> {
> tableData = Service3.EndGetUpcoming(iar).**
> ToList();
> Android.App.Application.**
> SynchronizationContext.Post(**delegate
> {
> if (tableData.Count == 0)
> {
> tableData[0].PostTime = "No data from the
> webservice";
> }
>
> f.Add(tableData[0].PostTime);
> Console.WriteLine("f[0] = {0}", f[0]);
> }, null);
> }, null);
> }
> catch (Exception oe)
> {
> f.Add(oe.ToString());
> return f;
> }
> return f;
> }
>
> Not sure, it could also be the
> Android.App.Application.**SynchronizationContext.Post
> code.
>
> Any help here would be appreciated. Thanks
>
> Paul
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