public CardsFileWriter(CardsFile cFile)
{
if (!isCardFileValid(cFile))
{
throw new ArgumentException("CardsFile object is invalid.");
}
else
{
this._cFile = cFile;
}
}
private void btnSaveAs_Click(object sender, EventArgs e)
{
CardsFile cFile = null;
if (saveFileDialog1.ShowDialog() == DialogResult.OK)
{
cFile = new CardsFile(saveFileDialog1.FileName);
}
try {
CardsFileWriter writer = new CardsFileWriter(cFile);
writer.WriteData();
} catch (ArgumentException) {
MessageBox.Show("Deck data is corrupted or invalid, could not save.",
"Invalid or Corrupted Project Data",
MessageBoxButtons.OK,
MessageBoxIcon.Error);
}
}
private void btnLoad_Click(object sender, EventArgs e)
{
try {
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
CardsFileReader reader = new CardsFileReader(openFileDialog1.FileName);
// Read cards data from the file
CardsFile cFile = reader.ReadData();
// Populate cards data into UI
this.deckName = cFile.DeckName;
this.cards = cFile.Cards;
}
} catch (ArgumentException) {
MessageBox.Show(
"The file you have selected is not valid.",
"Invalid File",
MessageBoxButtons.OK,
MessageBoxIcon.Error);
}
}
/// <summary>
/// Determines if a specified <see cref="CardsFile"/> is valid.
/// </summary>
/// <param name="cFile">The object to check.</param>
/// <returns>True if the CardsFile object can be commited to a file, otherwise False.</returns>
private bool isCardFileValid(CardsFile cFile)
{
bool isValid = true;
// Check that CardsFile isn't null
if (cFile == null)
{
return(false);
}
// Check that FileLocation isn't null
if (cFile.FileLocation == null || cFile.FileLocation.Length < 1)
{
isValid = false;
}
// Check that CardsFile has project name
if (cFile.DeckName == null || cFile.DeckName.Length > 0)
{
isValid = false;
}
return(isValid);
}
/// <summary>
/// Reads card data from the XML formated file specified by the file location supplied to this class's constructor.
/// </summary>
/// <returns>A <see cref="CardsFile"/> object populated with the data from the file.</returns>
public CardsFile ReadData()
{
CardsFile cFile = new CardsFile(this._fileLoc);
List <CardData> cards = new List <CardData>();
XmlDocument doc = new XmlDocument();
doc.Load(this._fileLoc);
// Get Deck Name and populate in cFile variable
cFile.DeckName = doc.SelectSingleNode("/Cards").Attributes["DeckName"].Value;
// Read each Card in the xml file and store in cards variable
foreach (XmlNode node in doc.SelectNodes("/Cards/Card"))
{
CardData card = new CardData();
card.Question = node.SelectSingleNode("Question").InnerText;
card.Answer = node.SelectSingleNode("Answer").InnerText;
cards.Add(card);
}
// Populate cards data in cFile variable
cFile.Cards = cards.ToArray();
return(cFile);
}
