C# 知识点集锦（一）

例子一：已知一个类有两个属性，打印属性名的代码如下。要求屏蔽某个属性。

已知:

    class Program
    {
        static void Main(string[] args)
        {
            PropertyInfo [] info=new Test().GetType().GetProperties();
            foreach(PropertyInfo p in info)
            {
                Console.WriteLine(p.Name);
            }
            Console.ReadLine();

        }
    }

    public class Test
    {
        public string One { get; set; }
        public string Two { get; set; }

    }
}

 解决方案：

    class Program
    {
        static void Main(string[] args)
        {
            PropertyInfo[] info = new Test().GetType().GetFilteredProperties();
            foreach(PropertyInfo p in info)
            {
                Console.WriteLine(p.Name);
            }
            Console.ReadLine();

        }
    }

    public  class SkipPropertyAttribute : Attribute { }
    public static class TypeExtensions
    {
        public static PropertyInfo[] GetFilteredProperties(this Type type)
        {
            return type.GetProperties().Where(pi => pi.GetCustomAttributes(typeof(SkipPropertyAttribute), true).Length == 0).ToArray();

        }
    }

    public class Test
    {
        
        public string One { get; set; }
        [SkipProperty]
        public string Two { get; set; }

    }

 或者

        public static PropertyInfo[] GetFilteredProperties(this Type type)
        {
            return type.GetProperties()
      .Where(pi => !Attribute.IsDefined(pi, typeof(SkipPropertyAttribute)))
      .ToArray();

        }

 例子2：在XML中实现IF ELSE WHILE 等

https://stackoverflow.com/questions/6061470/if-then-else-using-xml

https://stackoverflow.com/questions/34653740/how-to-use-an-if-else-condition-in-a-sapui5-xml-view

https://stackoverflow.com/questions/46630446/how-to-implement-while-like-loop-in-xslt