private void AddCancellation()
{
int count;
if (!int.TryParse(txtCount.Text, out count))
throw new Exception("Die eingegebene Anzahl ist ungültig.");
if (cmbArticle.SelectedItem == null)
throw new Exception("Es muss ein Artikel ausgewählt werden.");
templ = new CancellationTemplate();
templ.Article = (Article)cmbArticle.SelectedItem;
templ.User = (User)cmbUser.SelectedItem;
templ.Count = count;
Cancellation c = templ.Create();
((Profile)cmbProfile.SelectedItem).Cancellations.Add(c);
cmbArticle.SelectedIndex = -1;
}
public static Cancellation NewCancellation(CancellationTemplate cancTemplate)
{
Cancellation result = null;
try
{
string query = "INSERT INTO Cancellation (UserID, ArticleID, ArticleCount) VALUES (" +
cancTemplate.User.UserID + "," + cancTemplate.Article.ArticleID + "," + cancTemplate.Count + "); "+
"SELECT * FROM Cancellation WHERE CancellationID = SCOPE_IDENTITY();";
SqlConnection connection = new SqlConnection(ConnectionString);
SqlCommand cmd = new SqlCommand(query, connection);
connection.Open();
SqlDataReader reader = cmd.ExecuteReader();
while (reader.Read())
{
result = new Cancellation(
Convert.ToInt32(reader["CancellationID"]),
GetUser(Convert.ToInt32(reader["UserID"])),
GetArticle(Convert.ToInt32(reader["ArticleID"])),
Convert.ToInt32(reader["ArticleCount"]),
Convert.ToDateTime(reader["Created"])
);
}
connection.Close();
}
catch (Exception ex)
{
string errmsg = "Fehler beim Erstellen des Stornos.\n\n";
errmsg += "DatabaseHandler.NewCancellation(cancTemplate): " + ex.ToString();
throw new Exception(errmsg);
}
if (result == null)
throw new Exception("Fehler beim Erstellen des Stornos. Das Speichern konnte nicht verifiziert werden.\n\nDatabaseHandler.NewCancellation(cancTemplate)");
return result;
}