How to fill DataTable from multiple tables? - sql-server

Question

I have written a stored procedure which gives me result from 3 tables separately. Please have a look on the screenshot.
DataTable dataTable = ds.Tables[0]; gives me top result from screenshot, DataTable dataTable = ds.Tables[1]; gives me middle one from screenshot and ds.Tables[2]; gives me last one.
Now, I want to get all the table information. Please have a look on my code. I am not getting the result.
System.ArgumentException: 'Column 'race_header' does not belong to
table Table2.'
Please provide the solutions for this.
public List<ClsStakesRaces> RaceNameDetails(int? Id)
{
List<ClsStakesRaces> clsStakes = new List<ClsStakesRaces>();
SqlParameter[] prms = new SqlParameter[1];
string sSQL;
sSQL = "exec StakesRacesGetRaceDetails #Id";
prms[0] = new SqlParameter("#Id", SqlDbType.Int);
prms[0].Value = Id;
ds = clsUtilities.CreateCommandwithParams(sSQL, prms);
DataTable dataTable = new DataTable();
dataTable = ds.Tables[0];
dataTable= ds.Tables[1];
dataTable = ds.Tables[2];
foreach (DataRow dr in dataTable.Rows)
{
clsStakes.Add(
new ClsStakesRaces
{
RaceName = Convert.ToString(dr["race_header"]),
HorseId = Convert.ToInt32(dr["HorseID"]),
Horse = Convert.ToString(dr["Horse"]),
Details = Convert.ToString(dr["Details"]),
Breeding = Convert.ToString(dr["Breeding"]),
Earning = Convert.ToDecimal(dr["Earning"]),
PreviousWinner = Convert.ToString(dr["PreviousWinners"])
});
}
return clsStakes;
}

Answer 1

Looking at your code:
DataTable dataTable = new DataTable();
dataTable = ds.Tables[0]; // actually, forget the new DataTable() bit, changed my mind, point to ds.Tables[0] instead
dataTable= ds.Tables[1]; // actually, forget ds.Tables[0], point to ds.Tables[1] instead
dataTable = ds.Tables[2]; // actually, forget ds.Tables[1], point to ds.Tables[2] instead
So then
foreach (DataRow dr in dataTable.Rows)
is actually
foreach (DataRow dr in ds.Tables[2].Rows)
Your third table (ds.Tables[2]) doesn't have a column called race_header, hence your error.
You probably want to return a single statement based upon a JOIN condition in the SQL stored procedure. If you can't do that for some reason, you will need to iterate each of ds.Tables separately, stitching the objects together in memory.