C# Attribute 简单应用。

建立一个Attribute:

public class EntityMappingAttribute : Attribute
    {
        public string TableName{get;set;}
        public string SortOrder { get; set; }
    }

建一个类：

public class User
    {
        [EntityMapping(TableName = "test",SortOrder="5")]
        public string name { get; set; }
    }

得到attribute的值 ：

　　

User u = new User();
            u.name = "Andy";

            PropertyInfo pi = u.GetType().GetProperty("name");
            var lst = pi.GetCustomAttributes(true);
            foreach (var l in lst)
            {
                EntityMappingAttribute ema = l as EntityMappingAttribute;
                richTextBox1.Text += ema.TableName + "\n";
                richTextBox1.Text += ema.SortOrder + "\n";
            }