通过反射获取struct中定义的Field的名称和值 Anny

下面的代码是利用反射获取类或结构的Field和Property，其中，需要注意的是，当使用反射为结构的Field设置值时，不能使用SetValue方法，而是使用SetValueDirect()，FieldInfo.SetValue (Not work with Structure)，具体如下：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Reflection;
using System.Data;
namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {           
            DataTable dt = GetFiledNames();
            for (int i = 0; i < dt.Columns.Count; i++)
            {
                Console.WriteLine(dt.Columns[i].Caption);
            }
            dt.Rows[1][0] = 1;
            dt.Rows[1][1] = 2;
            Point p = GetFieldValues(dt);
            Console.WriteLine("{0},{1}", p.x, p.y);

            Console.Read();
        }
       
        private static DataTable GetPropertyNames()
        {
            PropertyInfo[] propertyInfos;           
            propertyInfos = typeof(Point).GetProperties();
            DataTable dt = new DataTable();
            int i = 0;

            foreach (PropertyInfo item in propertyInfos)
            {
                dt.Columns.Add();
                dt.Columns[i].Caption = item.Name;
                dt.Columns[i].DataType = item.PropertyType;
                i++;
            }
            for (int j = 0; j < 2; j++)
            {
                DataRow dr = dt.NewRow();
                dt.Rows.Add(dr);
            }

            return dt;
        }
       
        private static Point GetPropertyValues(DataTable dt)
        {
            PropertyInfo[] propertyInfos;
            propertyInfos = typeof(Point).GetProperties();

            Point p = new Point();
            for (int i = 0; i < dt.Columns.Count; i++)
            {
                propertyInfos[i].SetValue(p, dt.Rows[1][i], null);

            }
            return p;
        }

        private static DataTable GetFiledNames()
        {
            FieldInfo[] fieldInfos;
            fieldInfos = typeof(Point).GetFields();
            DataTable dt = new DataTable();
            int i = 0;

            foreach (FieldInfo item in fieldInfos)
            {
                dt.Columns.Add();
                dt.Columns[i].Caption = item.Name;
                dt.Columns[i].DataType = item.FieldType;
                i++;
            }
            for (int j = 0; j < 2; j++)
            {
                DataRow dr = dt.NewRow();
                dt.Rows.Add(dr);
            }

            return dt;
        }

        private static Point GetFieldValues(DataTable dt)
        {
            FieldInfo[] fieldInfos;
            fieldInfos = typeof(Point).GetFields();

            Point p = new Point();
            for (int i = 0; i < dt.Columns.Count; i++)
            {
                fieldInfos[i].SetValueDirect(__makeref(p), dt.Rows[1][i]);

            }
            return p;
        }
    }

    public struct Point
    {
        public int x;
        public int y;
        //public int x { get; set; }
        //public int y { get; set; }       
    }   
}

参考资料：

http://connect.microsoft.com/VisualStudio/feedback/details/88486/fieldinfo-setvalue-not-work-with-structure

http://msdn.microsoft.com/zh-cn/library/system.data.datatable.newrow(VS.80).aspx

http://www.csharp-examples.net/reflection-property-names/