Look-up Selected Attribute Field Error

BeverlyPham

I am trying to return a list of selected feature attribute field, "mukey" from a feature class, "MUPOLYGON". I tried to look-up the mukey using the GetTable() method and creating a mukey list. However, I am getting an error that says cannot convert a Task to a string parameter when I tried to use the mukey list as a parameter for another method. I have the following questions: 

1. What is a light weight method to obtain a mukey list from the selected feature field, mukey? 

2. How do I resolve the conversion error? 

public async Task LookupMukey()
{
var mukeys = new List<string>();
var MV = MapView.Active;
int mukeyCount = 0;
var SelectionLayer = MV.Map.GetLayersAsFlattenedList().OfType<FeatureLayer>().Where(fl => fl.Name.Contains("SelectionLayer")).FirstOrDefault();

await QueuedTask.Run(() =>
{
using (var SelectionTable = SelectionLayer.GetTable())
{
using (var rowCursor = SelectionTable.Search())
{
while (rowCursor.MoveNext())
{
using (Row row = rowCursor.Current)
{
var mukey = Convert.ToString(row["mukey"]);
mukeys.Add(mukey);
mukeyCount++;
}
}
}
}
return mukeys;
});
}

Using the mukey list as a parameter for another method: 

Process.ChorizonData(mukeys,"awc_l", "awc_r", "awc_h", inputPath);  //error occurs here at mukey

Thanks for your help!

tzz_12

Hi Gintautas, 

What if I am calling the LookupMukey method in a ICommand event handler? How should I call the LookupMukey()? Please see the example below: 

//within a public ICommand CmdRun binded to a Run button

AllProcesses Process = new AllProcesses();

var mukeys = await Process.LookupMukey();    //error occurs here

//codes below - calling multiple methods and passing the list of mukeys as one of the parameters

Thanks for your help!