【C#】利用反射构建实体

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Reflection;

namespace RftToModel {
    class Program {
        static void Main(string[] args) {

            var result = ToModel<TestModel>.GetDelegate_ToModelList(BuildSampleTable());

            foreach (var item in result) {
                Console.WriteLine(item);
            }

            Console.Read();

        }

        static DataTable BuildSampleTable() {
            DataTable result = new DataTable();
            result.Columns.Add("ID", typeof(int));
            result.Columns.Add("Name", typeof(string));
            result.Columns.Add("IsDeleted", typeof(bool));

            result.Rows.Add(new object[] { 1, "M.K", false });
            result.Rows.Add(new object[] { 2, "B.G", true });

            return result;

        }

    }

    public class TestModel {
        public int ID { get; set; }
        public string Name { get; set; }
        public bool IsDeleted { get; set; }

        public override string ToString() {
            return string.Format("ID:{0} Name:{1} IsDeleted:{2}", ID, Name, IsDeleted);
        }
    }

    public delegate void SetValue<T>(T value);

    public static class ToModel<T> where T : class, new() {

        private static Delegate CreateSetDelegate(T model, string propertyName) {
            MethodInfo mi = model.GetType().GetProperty(propertyName).GetSetMethod();
            //这里构造泛型委托类型
            Type delType = typeof(SetValue<>).MakeGenericType(GetPropertyType(propertyName));

            return Delegate.CreateDelegate(delType, model, mi);
        }

        private static Type GetPropertyType(string propertyName) {
            return typeof(T).GetProperty(propertyName).PropertyType;
        }

        public static IList<T> GetDelegate_ToModelList(DataTable dt) {
            IList<T> list = new List<T>();
            if (dt == null || dt.Rows.Count < 1) return list;

            Delegate setDelegate;
            foreach (DataRow dr in dt.Rows) {
                T model = new T();
                foreach (DataColumn dc in dt.Columns) {
                    setDelegate = CreateSetDelegate(model, dc.ColumnName);
                    //这里改变类型
                    setDelegate.DynamicInvoke(Convert.ChangeType(dr[dc.ColumnName], GetPropertyType(dc.ColumnName)));
                }
                list.Add(model);
            }
            return list;
        }
    }

}

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