/// <summary>
/// Deserialize the object.
/// </summary>
/// <param name="type">The type being read.</param>
/// <param name="reader">The reader to use.</param>
/// <returns>Returns the deserialized object.</returns>
internal static object Deserialize(Type type, OleDbDataReader reader)
{
object data = Activator.CreateInstance(type);
foreach (PropertyInfo prop in type.GetProperties())
{
AccessColumnAttribute attr = prop.GetCustomAttribute <AccessColumnAttribute>();
if (attr != null)
{
int ordinal = reader.GetOrdinal(attr.Name);
object value = null;
if (!reader.IsDBNull(ordinal))
{
Type fieldType = reader.GetFieldType(ordinal);
if (fieldType == typeof(string))
{
value = reader.GetString(ordinal);
}
else if (fieldType == typeof(short))
{
value = reader.GetInt16(ordinal);
}
else if (fieldType == typeof(int))
{
value = reader.GetInt32(ordinal);
}
else if (fieldType == typeof(byte))
{
value = reader.GetByte(ordinal);
}
else if (fieldType == typeof(DateTime))
{
value = reader.GetDateTime(ordinal);
}
else if (fieldType == typeof(double))
{
value = reader.GetDouble(ordinal);
}
else if (fieldType == typeof(decimal))
{
value = reader.GetDecimal(ordinal);
}
else if (fieldType == typeof(bool))
{
value = reader.GetBoolean(ordinal);
}
else
{
Debugger.Break();
}
}
prop.SetValue(data, value);
}
}
return(data);
}
/// <summary>
/// Add a value to the db.
/// </summary>
/// <param name="settings">The access settings.</param>
/// <param name="type">The type to add.</param>
/// <param name="item">The item to add.</param>
/// <returns>Returns the item id to add, or null if it wasn't.</returns>
internal static int?Add(AccessSettings settings, Type type, object item)
{
AccessTableAttribute typeAttr = type.GetCustomAttribute <AccessTableAttribute>();
int?id = null;
if (typeAttr != null)
{
string columns = string.Empty;
string values = string.Empty;
Dictionary <string, object> data = new Dictionary <string, object>();
foreach (PropertyInfo prop in type.GetProperties())
{
AccessColumnAttribute dataAttr = prop.GetCustomAttribute <AccessColumnAttribute>();
if (dataAttr != null)
{
if (!dataAttr.IsReadonly)
{
string cleanName = prop.Name;
Object value = prop.GetValue(item);
if (value != null)
{
columns += (string.IsNullOrWhiteSpace(columns) ? "" : ",") + $"[{dataAttr.Name}]";
values += (string.IsNullOrWhiteSpace(values)? "" : ",") + $"@{prop.Name}";
data.Add(prop.Name, value);
}
}
}
}
AccessWrapper.ExecuteDatabase(settings, $"INSERT INTO [{typeAttr.Table}] ({columns}) VALUES ({values})", data, (command) =>
{
command.ExecuteNonQuery();
id = AccessWrapper.QueryDatabase <int?>(settings, $"SELECT TOP 1 * FROM [{typeAttr.Table}] ORDER BY [{typeAttr.Key}] DESC", (ids) =>
{
ids.Read();
return(ids.GetInt32(0));
});
});
}
return(id);
}
/// <summary>
/// Modify a value.
/// </summary>
/// <param name="settings">The settings to the access database.</param>
/// <param name="type">The values type.</param>
/// <param name="id">The item id to modify.</param>
/// <param name="item">This values to modify</param>
internal static void Modify(AccessSettings settings, Type type, int id, object item)
{
AccessTableAttribute typeAttr = type.GetCustomAttribute <AccessTableAttribute>();
if (typeAttr != null)
{
string setValues = string.Empty;
Dictionary <string, object> data = new Dictionary <string, object>();
if (item != null)
{
foreach (PropertyInfo prop in type.GetProperties())
{
AccessColumnAttribute dataAttr = prop.GetCustomAttribute <AccessColumnAttribute>();
if (dataAttr != null)
{
if (!dataAttr.IsReadonly)
{
string cleanName = prop.Name;
Object value = prop.GetValue(item);
if (value != null)
{
setValues += (string.IsNullOrWhiteSpace(setValues) ? "" : ",") + $"[{dataAttr.Name}] = @{prop.Name}";
data.Add(prop.Name, value);
}
}
}
}
}
if (!string.IsNullOrWhiteSpace(setValues))
{
AccessWrapper.ExecuteDatabase(settings, $"UPDATE [{typeAttr.Table}] SET {setValues} WHERE [{typeAttr.Key}] = @1", data);
}
else
{
throw new ArgumentException("No arguments.");
}
}
}
