实体转换类

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

namespace AAAAA
{
    /// <summary>
    /// 泛型类
    /// </summary>
    /// <typeparam name="T"></typeparam>
    public class ModelConvertHelper<T> where T : new()
    {

        /// <summary>
        /// 通过反射把一个类的属性的值赋值给另一个类
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <typeparam name="S"></typeparam>
        /// <returns></returns>
        public static T Mapper<S>(S s)
        {
            T d = Activator.CreateInstance<T>();
            var sType = s.GetType();
            var dType = typeof(T);
            foreach (PropertyInfo sP in sType.GetProperties())
            {
                foreach (PropertyInfo dP in dType.GetProperties())
                {
                    if (dP.Name == sP.Name)
                    {
                        if (dP.PropertyType.Name == typeof(string).Name && sP.GetValue(s) == null)
                        {
                            dP.SetValue(d, string.Empty);
                        }
                        else
                        {
                            dP.SetValue(d, sP.GetValue(s));
                        }
                    }
                }
            }
            return d;
        }

        /// <summary>
        /// 通过反射把一个类的属性的值赋值给另一个类
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <typeparam name="S"></typeparam>
        /// <returns></returns>
        public static T MapperToString<S>(S s)
        {
            T d = Activator.CreateInstance<T>();
            var sType = s.GetType();
            var dType = typeof(T);
            foreach (PropertyInfo sP in sType.GetProperties())
            {
                foreach (PropertyInfo dP in dType.GetProperties())
                {
                    if (dP.Name == sP.Name)
                    {
                        if (sP.GetValue(s) != null)
                        {
                            dP.SetValue(d, sP.GetValue(s).ToString());
                        }
                    }
                }
            }
            return d;
        }

        /// <summary>
        /// 将Dt转换成List
        /// </summary>
        /// <param name="dt"></param>
        /// <returns></returns>
        public static List<T> ConvertToModel(DataTable dt)
        {
            // 定义集合
            List<T> ts = new List<T>();
            // 获得此模型的类型
            Type type = typeof(T);
            string tempName = "";
            foreach (DataRow dr in dt.Rows)
            {
                T t = new T();
                // 获得此模型的公共属性
                PropertyInfo[] propertys = t.GetType().GetProperties();
                foreach (PropertyInfo pi in propertys)
                {
                    tempName = pi.Name;
                    // 检查DataTable是否包含此列
                    if (dt.Columns.Contains(tempName))
                    {
                        // 判断此属性是否有Setter
                        if (!pi.CanWrite) continue;
                        //属性赋值
                        object value = dr[tempName];
                        if (value != DBNull.Value)
                        {
                            pi.SetValue(t, value);
                        }
                        else if (pi.PropertyType.Name == typeof(string).Name)
                        {
                            pi.SetValue(t, string.Empty);
                        }
                    }
                }
                ts.Add(t);
            }
            return ts;
        }
    }
}

调用

ActivityDataResult model=ModelConvertHelper<ActivityDataResult>.Mapper<HPR_ActivityData>(ActivityData); 
List<RSDUserInfo>list=ModelConvertHelper<RSDUserInfo>.ConvertToModel(resultDt);