.NET复习笔记-反射至获取类型特性

    /// <summary>
    /// 定义一个特性类
    /// </summary>
    class HL7MessageAttribute : Attribute
    {
        public string hl7MsgType { get; set; }
        public string ackMsgType { get; set; }
    }

    /// <summary>
    /// 使用自定义特性
    /// </summary>
    [HL7Message(ackMsgType ="ACKA01", hl7MsgType ="ADTA01")]
    class PatientManager
    {
        private object dataLayer = null;
        public string GetPatientName(int patientId)
        {
            return string.Empty;
        }
    }

private void showCustomAttributeInfo()
{

    PatientManager patientManager = new PatientManager();

    Type patientMngType = patientManager.GetType();
    Type patientMngAttrType = typeof(HL7MessageAttribute);
    HL7MessageAttribute attribute = null;
    if (patientMngType.IsDefined(patientMngAttrType, true))
    {
        attribute = patientMngType.GetCustomAttributes(patientMngAttrType, true).FirstOrDefault() as HL7MessageAttribute;
    }
    Debug.WriteLine($"Attribute name:{attribute.GetType().Name}");
    Debug.WriteLine($"HL7MsgType:{attribute.hl7MsgType}, AckMsgType:{attribute.ackMsgType}");
}