What are the features of Attribute
This article mainly explains "what are the features of Attribute". The content of the explanation is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn what are the features of Attribute.
The copy code is as follows:
/ *
* Properti
, /
The copy code is as follows:
Using System
Using System.Collections.Generic
Using System.Linq
Using System.Web
/ / /
/ Summary description of DisAttribute
/ / /
Public class DisAttribute: Attribute
{
Private string _ message
/ / /
/ description
/ / /
Public string Message
{
Get {return _ message;}
}
Public DisAttribute (string message)
{
This._message = message
}
}
/ *
* Class
, /
The copy code is as follows:
Using System
Using System.Collections.Generic
Using System.EnterpriseServices
Using System.Linq
Using System.Web
Using System.Web.DynamicData
/ / /
/ Summary description of User
/ / /
[DisAttribute ("User"), TableName ("user"), Description ("user")]
Public class User
{
Private int? _ id
/ / /
/ Id
/ / /
[DisAttribute ("primary key")]
Public int? Id
{
Get {return _ id;}
Set {_ id = value;}
}
Private string _ name
/ / /
/ / name
/ / /
[DisAttribute ("name")]
Public string Name
{
Get {return _ name;}
Set {_ name = value;}
}
}
/ *
* get
, /
The copy code is as follows:
/ / get the property
User u = new User ()
Type _ t = u.GetType ()
Foreach (Attribute an in _ t.GetCustomAttributes (true))
{
If (a.GetType () .ToString () = = "DisAttribute")
{
DisAttribute _ da = (DisAttribute) a
If (_ da! = null)
{
Response.Write (_ da.Message + "
")
}
}
}
/ / get all attributes
U.Id = 888888
U.Name = "Eason Chan"
Foreach (PropertyInfo item in _ t.GetProperties ())
{
/ / Features
Attribute atr = item.GetCustomAttribute (typeof (DisAttribute))
If (atr.GetType () .ToString () = = "DisAttribute")
{
DisAttribute _ da = (DisAttribute) atr
If (_ da! = null)
{
Response.Write (_ da.Message + "
")
}
}
}
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