/// <summary>
/// Writes the data for this export to the file specified.
/// </summary>
/// <param name="filename">The file to write to.</param>
/// <param name="geographyProvider">The geography data provider.</param>
/// <param name="booksReadProvider">The books data provider.</param>
/// <param name="errorMessage">The error message if unsuccessful.</param>
/// <returns>True if written successfully, false otherwise.</returns>
public bool WriteToFile(
string filename,
IGeographyProvider geographyProvider,
IBooksReadProvider booksReadProvider,
out string errorMessage)
{
errorMessage = string.Empty;
try
{
// Set up the nations file.
NationsFile nationsFile = new NationsFile();
foreach (Nation nation in geographyProvider.Nations.OrderBy(x => x.Name))
{
nationsFile.Nations.Add(nation);
}
// Serialize the XML
XmlSerializer xmlSerializer = new XmlSerializer(typeof(NationsFile));
TextWriter textWriter = new StreamWriter(filename, false, Encoding.Default); //overwrite original file
xmlSerializer.Serialize(textWriter, nationsFile);
// Tidy up
textWriter.Close();
}
catch (Exception e)
{
errorMessage = e.ToString();
return(false);
}
return(true);
}
/// <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 bool ReadFromFile(string filename, out string errorMessage)
{
errorMessage = string.Empty;
// Check the file exists.
if (!File.Exists(filename))
{
errorMessage = $"File {filename} does not exist";
return(false);
}
// Try to deserialize the nations file.
try
{
using (FileStream file = new FileStream(filename, FileMode.Open, FileAccess.Read))
{
// Create the serializer.
XmlSerializer xmlSerializer = new XmlSerializer(typeof(NationsFile));
// Try to read the nations file.
NationsFile nationsFile = xmlSerializer.Deserialize(file) as NationsFile;
if (nationsFile == null)
{
errorMessage = $"File {filename} could not be deserialized";
return(false);
}
ImportedItems.Clear();
// Add the items to the list.
foreach (Nation nation in nationsFile.Nations)
{
ImportedItems.Add(nation);
}
}
}
catch (Exception e)
{
errorMessage = e.ToString();
return(false);
}
return(true);
}
