public static void RemoveCancellation(Cancellation canc)
{
try
{
string query = "DELETE Cancellation WHERE CancellationID = " + canc.CancellationId;
SqlConnection connection = new SqlConnection(ConnectionString);
SqlCommand cmd = new SqlCommand(query, connection);
connection.Open();
cmd.ExecuteNonQuery();
connection.Close();
}
catch (Exception ex)
{
string errmsg = "Fehler beim Löschen des Stornos.\n\n";
errmsg += "DatabaseHandler.RemoveCancellation(canc): " + ex.ToString();
throw new Exception(errmsg);
}
}
public static void SaveCancellation(Cancellation canc)
{
try
{
string query = "UPDATE [Cancellation] SET UserID = " + canc.User.UserID + ", ArticleID = " + canc.Article.ArticleID + ", ArticleCount = " + canc.Count + ", Created = '" + canc.Created + "'" +
" WHERE CancellationID = " + canc.CancellationId;
SqlConnection connection = new SqlConnection(ConnectionString);
SqlCommand cmd = new SqlCommand(query, connection);
connection.Open();
cmd.ExecuteNonQuery();
connection.Close();
}
catch (Exception ex)
{
string errmsg = "Fehler beim Speichern der Änderungen des Stornos.\n\n";
errmsg += "DatabaseHandler.SaveCancellation(canc): " + ex.ToString();
throw new Exception(errmsg);
}
}
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;
}