C# 获取属性的description总结

现有一个结构体

public struct Desc
{
  private byte val1;
  [Description("一个属性")]
  public byte des
  {
  get { return val1; }
  set { val1 = value; }
  }

  ///...以下省略
}

获取Description代码：

string str = "";
  Desc desc = new Desc();
   
  ////不用反射 获取属性的特性
  PropertyDescriptor pd = TypeDescriptor.GetProperties(typeof(Desc))["des"];
  DescriptionAttribute description = pd == null ? null : pd.Attributes[typeof(DescriptionAttribute)] as DescriptionAttribute;
  str = description == null ? "" : description.Description;

  ////用反射 获取属性的特性
  PropertyInfo pi = typeof(Desc).GetProperty("des");
  foreach (object obj in pi.GetCustomAttributes(false))
  {
  if (obj is DescriptionAttribute)
  str=(obj as DescriptionAttribute).Description;
  }

  ////不用反射 获取结构体的特性
  AttributeCollection attributes = TypeDescriptor.GetAttributes(desc);//or typeof(Desc)
  DescriptionAttribute da = (DescriptionAttribute)attributes[typeof(DescriptionAttribute)];
  if(attributes.Contains(da))
  str = da.Description;

  ////用反射 获取结构体的特性
  Type myType = typeof(Desc);  
  foreach (object obj in myType.GetCustomAttributes(false))
  {
  if (obj is DescriptionAttribute)
  str = (obj as DescriptionAttribute).Description;
  }