Exemplo n.º 1
0
 private bool IsReserved(ReservedKey reservation)
 {
     for (int i = 0; i < ReservedKeys.Count; i++)
     {
         if (reservation == ReservedKeys[i])
         {
             return(true);
         }
     }
     return(false);
 }
Exemplo n.º 2
0
        protected ReservedKey ReserveKey(ReservedKey reservation)
        {
            while (IsReserved(reservation))
            {
                reservation++;
            }

            ReservedKeys.Add(reservation);

            return(reservation);
        }
Exemplo n.º 3
0
 protected void ReleaseKey(ReservedKey key)
 {
     for (int i = 0; i < ReservedKeys.Count; i++)
     {
         if (ReservedKeys[i] == key)
         {
             ReservedKeys[i].Release();
             ReservedKeys.Remove(i);
             break;
         }
     }
 }
Exemplo n.º 4
0
        /// <summary>
        /// Saves the current record to the database.
        /// </summary>
        public virtual void Save()
        {
            string Sql;

            try
            {
                // Ensure the object is ready to be saved
                ValidateSave();

                ReservedKey savekey = null;


                if (_dataRow.RowState == DataRowState.Detached)
                {
                    // Build SQL Insert Statement
                    // Set All Auto Keys

                    if (PrimaryKeys.Count > 1)
                    {
                        for (int i = 0; i < PrimaryKeys.Count; i++)
                        {
                            if (_dataRow[PrimaryKeys[i].Name].ToString() == String.Empty)
                            {
                                // Error Primary Key Not Set
                                DataObjectException PrimaryKeyError = new DataObjectException("One or more required fields do not have valid values.");
                                throw PrimaryKeyError;
                            }
                        }
                    }
                    else
                    {
                        // Only a single primary key, check to see if it has already been assigned
                        if (_dataRow[PrimaryKeys[0].Name].ToString() == String.Empty)
                        {
                            // Autonumber
                            savekey = GetNextKey();
                            Row[PrimaryKeys[0].Name] = savekey.Value;
                        }
                        // Else key has already been assigned
                    }

                    _dataTable.Rows.Add(_dataRow);

                    Sql = "INSERT INTO " + TableName + "(";
                    // Column names
                    for (int i = 0; i < _dataTable.Columns.Count; i++)
                    {
                        Sql += "[" + _dataTable.Columns[i].ColumnName + "], ";
                    }
                    Sql = Sql.Substring(0, Sql.Length - 2) + ") VALUES(";
                    // Column values
                    for (int i = 0; i < _dataTable.Columns.Count; i++)
                    {
                        if (_dataTable.Columns[i].DataType == System.Type.GetType("System.DateTime"))
                        {
                            if (_dataRow[i].ToString() == String.Empty)
                            {
                                Sql += "null";
                            }
                            else
                            {
                                Sql += "'" + ((DateTime?)_dataRow[i]).Value.ToString("yyyy/MM/dd HH:mm:ss") + "'";
                            }
                        }
                        else if (_dataTable.Columns[i].DataType == System.Type.GetType("System.String"))
                        {
                            Sql += "'" + _dataRow[i].ToString().Replace("'", "''") + "'";
                        }
                        else if (_dataTable.Columns[i].DataType == System.Type.GetType("System.Int32"))
                        {
                            if (_dataRow[i].ToString() == String.Empty)
                            {
                                Sql += "null";
                            }
                            else
                            {
                                Sql += _dataRow[i].ToString();
                            }
                        }
                        else if ((_dataTable.Columns[i].DataType == System.Type.GetType("System.Single")) ||
                                 (_dataTable.Columns[i].DataType == System.Type.GetType("System.Double")) ||
                                 (_dataTable.Columns[i].DataType == System.Type.GetType("System.Decimal")) ||
                                 (_dataTable.Columns[i].DataType == System.Type.GetType("System.Int64")) ||
                                 (_dataTable.Columns[i].DataType == System.Type.GetType("System.Int16")))
                        {
                            if (_dataRow[i].ToString() == String.Empty)
                            {
                                Sql += "null";
                            }
                            else
                            {
                                Sql += _dataRow[i].ToString();
                            }
                        }
                        else if (_dataTable.Columns[i].DataType == System.Type.GetType("System.Boolean"))
                        {
                            if ((bool)_dataRow[i] == true)
                            {
                                Sql += "1";
                            }
                            else
                            {
                                Sql += "0";
                            }
                        }
                        else
                        {
                            DataObjectException InvalidDataType = new DataObjectException("Unsupported data type. [" + _dataTable.Columns[i].DataType.ToString() + "]");
                            throw InvalidDataType;
                        }

                        if (i != _dataTable.Columns.Count - 1)
                        {
                            Sql += ", ";
                        }
                    }
                    Sql += ")";
                }
                else
                {
                    // Build SQL Update Statement
                    Sql = "UPDATE " + TableName + " SET ";

                    for (int i = 0; i < _dataTable.Columns.Count; i++)
                    {
                        if (!IsPrimaryKey(_dataTable.Columns[i].ColumnName))
                        {
                            Sql += "[" + _dataTable.Columns[i].ColumnName + "]" + " = ";

                            if (_dataTable.Columns[i].DataType == System.Type.GetType("System.DateTime"))
                            {
                                if (_dataRow[i].ToString() == String.Empty)
                                {
                                    Sql += "null";
                                }
                                else
                                {
                                    Sql += "'" + ((DateTime)_dataRow[i]).ToString("yyyy/MM/dd HH:mm:ss") + "'";
                                }
                            }
                            else if ((_dataTable.Columns[i].DataType == System.Type.GetType("System.Int32")) ||
                                     (_dataTable.Columns[i].DataType == System.Type.GetType("System.Decimal")) ||
                                     (_dataTable.Columns[i].DataType == System.Type.GetType("System.Double")) ||
                                     (_dataTable.Columns[i].DataType == System.Type.GetType("System.Int64")) ||
                                     (_dataTable.Columns[i].DataType == System.Type.GetType("System.Int16")))

                            {
                                if (_dataRow[i].ToString() == String.Empty)
                                {
                                    Sql += "null";
                                }
                                else
                                {
                                    Sql += _dataRow[i].ToString();
                                }
                            }
                            else if (_dataTable.Columns[i].DataType == System.Type.GetType("System.String"))
                            {
                                Sql += "'" + _dataRow[i].ToString().Replace("'", "''") + "'";
                            }
                            else if (_dataTable.Columns[i].DataType == System.Type.GetType("System.Boolean"))
                            {
                                if ((bool)_dataRow[i] == true)
                                {
                                    Sql += "1";
                                }
                                else
                                {
                                    Sql += "0";
                                }
                            }
                            else
                            {
                                Sql += _dataRow[i].ToString();
                            }
                            if (i != _dataTable.Columns.Count - 1)
                            {
                                Sql += ", ";
                            }
                        }
                    }

                    Sql += " WHERE";

                    string GetID = "0";
                    for (int i = 0; i < PrimaryKeys.Count; i++)
                    {
                        if (i > 0)
                        {
                            Sql += " AND";
                        }

                        if (_dataRow[PrimaryKeys[i].Name] is int)
                        {
                            GetID = ((int)_dataRow[PrimaryKeys[i].Name]).ToString();
                        }
                        else if (_dataRow[PrimaryKeys[i].Name] is string)
                        {
                            GetID = (string)_dataRow[PrimaryKeys[i].Name];
                        }
                        else
                        {
                            DataObjectException InvalidDataType = new DataObjectException("Unsupported data type. [" + _dataTable.Columns[i].DataType.ToString() + "]");
                            throw InvalidDataType;
                        }
                        Sql += " " + PrimaryKeys[i].Name + " = " + GetID;
                    }
                }

                DataCommand.CommandText = Sql;
                DataCommand.Connection  = ConnHandler.RequestConnection(Alias, this);

                while (true) // Loop until Break for success
                {
                    try
                    {
                        DataCommand.ExecuteNonQuery();
                        break; // Save Successful
                    }
                    catch (OleDbException err)
                    {
                        if (err.ErrorCode == -2147217873) // Primary Key violation
                        {
                            // Primary Key that was used already existed
                            savekey++;
                            DataCommand.CommandText = DataCommand.CommandText.Replace("VALUES (" + (savekey.Value - 1) + ",", "VALUES (" + savekey.Value.ToString() + ",");
                        }
                        else
                        {
                            throw err;
                        }
                    }
                }
                if (Sql.StartsWith("INSERT INTO"))
                {
                    ReleaseKey(savekey);
                }
            }
            catch (Exception err)
            {
                throw err;
            }
            finally
            {
                ConnHandler.ReleaseConnection(this, DataCommand.Connection);
            }
        }
Exemplo n.º 5
0
 public void Add(ReservedKey keyObject)
 {
     List.Add(keyObject);
 }