/// <summary>
/// 读取一个枚举值。
/// </summary>
/// <typeparam name="T">枚举类型</typeparam>
/// <returns>返回一个枚举</returns>
public T ReadEnum <T>() where T : struct, Enum
{
dataReader.OnReadValue(key, valueCopyer);
return(valueCopyer.ReadEnum <T>());
}