/// <summary>
/// Reads the data for this import from the file specified.
/// </summary>
/// <param name="filename">The file to read from.</param>
/// <param name="errorMessage">The error message if unsuccessful.</param>
/// <returns>True if read successfully, false otherwise.</returns>
public override bool ReadFromFile(string filename, out string errorMessage)
{
_constituencyResultProvider = new ConstituencyResultProvider();
errorMessage = string.Empty;
// Try to deserialize the file into the constituency results.
List <ConstituencyResult> constituencyResults = new List <ConstituencyResult>();
try
{
using (StreamReader sr = new StreamReader(filename, Encoding.Default))
{
CsvReader csv = new CsvReader(sr, CultureInfo.CurrentCulture);
bool foundStartDataTag = false;
while (csv.Read())
{
// Get the first field.
string onsCode = csv.GetField <string>(0);
// Ignore empty entries.
if (string.IsNullOrWhiteSpace(onsCode))
{
continue;
}
// If haven't found the header line see if this is it
if (!foundStartDataTag)
{
if (onsCode.Contains(DataStartTag))
{
foundStartDataTag = true;
}
continue;
}
// If here on a line with data convert it into a record.
constituencyResults.Add(
GetConstituencyResultFromRecord(csv, onsCode, PartyNames));
}
}
}
catch (Exception e)
{
errorMessage = e.ToString();
return(false);
}
if (constituencyResults.Any())
{
_constituencyResultProvider =
new ConstituencyResultProvider(constituencyResults);
}
return(true);
}
private static ConstituencyResultProvider GetConstituencyResultProviderWithSwings(
IConstituencyResultProvider provider,
Dictionary <string, float> swingsByParty)
{
List <ConstituencyResult> resultsWithSwings = new List <ConstituencyResult>();
foreach (string constituencyName in provider.ConstituencyNames)
{
resultsWithSwings.Add(
new ConstituencyResult(provider.ResultsByName[constituencyName], swingsByParty));
}
ConstituencyResultProvider predictedResultProvider =
new ConstituencyResultProvider(resultsWithSwings);
return(predictedResultProvider);
}
