private async void buttSubmit_Clicked(object sender, EventArgs e)
{
double num;
var num_text = txtNumber.Text.Trim();
if (num_text == "pi")
{
num = pi;
}
else if (num_text == "e")
{
num = euler;
}
else if (!double.TryParse(num_text, out num))
{
await DisplayAlert("Invalid", "There was an error parsing the number", "Ok");
return;
}
int count;
if (!int.TryParse(txtIterations.Text, out count))
{
await DisplayAlert("Invalid", "There was an error parsing the iterations", "Ok");
return;
}
ContinuedFractionResponse resp = await WebServiceCom.POSTContinuedFractionRequest(num, count);
if (resp == null)
{
await DisplayAlert("Server Error", "There was an issue communicating the server", "Ok");
return;
}
else if (!string.IsNullOrWhiteSpace(resp.ServerResponse))
{
await DisplayAlert("Bad Request", resp.ServerResponse, "Ok");
return;
}
else
{
txtOutput.Text = convertEnumerableToString(resp.qSequence);
}
}
public async Task <ContinuedFractionResponse> GetContinuedFractionExpansion(ContinuedFractionRequest rqst)
{
if (string.IsNullOrWhiteSpace(GlobalVariables.CPP_AppPath) || !File.Exists(GlobalVariables.CPP_AppPath))
{
throw new NotImplementedException();
}
if (rqst.Number == 0 || rqst.Count == 0)
{
return(new ContinuedFractionResponse()
{
ServerResponse = "Missing or invalid inputs."
});
}
string filename = string.Format("{0}.json", Guid.NewGuid().ToString()); //cant use a static filename when the server is processing multiple requests
var info = new ProcessStartInfo(GlobalVariables.CPP_AppPath);
info.CreateNoWindow = true;
info.Arguments = string.Format("{0} {1} {2} /s", rqst.Number, rqst.Count, filename);
var p = Process.Start(info);
p.WaitForExit();
ContinuedFractionResponse resp = null;
if (File.Exists(filename))
{
//the c++ program wont output anything if there were problems
using (var sr = new StreamReader(filename))
{
var jsonString = await sr.ReadToEndAsync();
try
{
resp = JsonConvert.DeserializeObject <ContinuedFractionResponse>(jsonString);
}
catch (Exception ex)
{
resp = new ContinuedFractionResponse()
{
ServerResponse = ex.Message
};
}
}
//delete the file now to save room when processing multiple requests
try
{
File.Delete(filename);
}
catch (Exception ex)
{
}
}
else
{
resp = new ContinuedFractionResponse()
{
ServerResponse = "There was an issue processing the request."
};
}
return(resp);
}
