As already explained by PIEBALDconsult the problem is there is no Table[0] in the dataset thats why you are getting error. Change your data retrieval logic as follows.
var sqlConnection = new SQLConnectionStrings();
DataSet dsReport = new DataSet();
using(var conReport = new SqlConnection(connString))
{
conReport.Open();
var cmdReport = new SqlCommand(baseQuery, conn);
var myDataAdapter = new SqlDataAdapter(command);
myDataAdapter.Fill(dsReport);
}
This will populate dsReport.Tables[0] that you can further use for reporting.