MVC EF 修改 封装类 通用泛型方法(一)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data.Entity.Infrastructure;
using System.Data.Entity;

namespace DAL
{
    public class EF_Help
    {
        DbContext db;  //数据上下文
        /// <summary>
        ///  修改 个别 数据  
        /// </summary>
        /// <param name="model">要修改的实体对象</param>
        /// <param name="proNames">要修改的 属性 名称</param>
        /// <returns></returns>
        public int Modify<T>(T model, params string[] proNames) where T : class
        {
            DbEntityEntry entry = db.Entry<T>(model);
            entry.State = EntityState.Unchanged;
            foreach (string proName in proNames)
            {
                entry.Property(proName).IsModified = true;
            }
            db.Configuration.ValidateOnSaveEnabled = false;
            return db.SaveChanges();
        }

        /// <summary>
        ///  修改 多数 数据, 个别数据除外,proNames 不写 则是 修改全部
        /// </summary>
        /// <param name="model">要修改的实体对象</param>
        /// <param name="proNames">不需要要修改的 属性 名称</param>
        /// <returns></returns>
        public int ModifyWithOutproNames<T>(T model, string prymartKey, params string[] proNames) where T : class
        {

            DbEntityEntry entry = db.Entry<T>(model);
            entry.State = EntityState.Unchanged;
            var properties = model.GetType().GetProperties();
            for (int i = 0; i < properties.Length; i++)
            {
                if (properties[i].PropertyType.Name.Contains("ICollection")
                    || properties[i].Name == prymartKey
                    || proNames.Contains(properties[i].Name)) continue;// 排除 外面 主键  proNames
                entry.Property(properties[i].Name).IsModified = true;
            }
            db.Configuration.ValidateOnSaveEnabled = false;
            return db.SaveChanges();
        }

        public EF_Help(DbContext dbContext)
        {
            db = dbContext;  
        }
    }
}

调用：

using System;
using System.Linq;
using System.Net;
using System.Web;
using System.Web.Mvc;
using KT_Product_Show_Market.Areas.Account.Models;
using Newtonsoft.Json;
using EntityFramework.Extensions;
using System.Collections;


namespace KT_Product_Show_Market.Areas.Account.Controllers
{
    public class UserController : Controller
    {
        public UserController()
        {
            ef_Help = new DAL.EF_Help(db);
        }
        KT_Product_MarketEntities db = new KT_Product_MarketEntities();
        DAL.Custom_Expression CE = new DAL.Custom_Expression();
        DAL.EF_Help ef_Help;

        [HttpPost]
        [ActionName("Edit")]
        public int Edit_Post(TraderInfo post_model)
        {
            int Temp = 0;
            if (string.IsNullOrEmpty(post_model.LoginPassward))
            {
                Temp = ef_Help.ModifyWithOutproNames<TraderInfo>(post_model, "LoginPassward");
            }
            else
            {
                Temp = ef_Help.ModifyWithOutproNames<TraderInfo>(post_model);
            }
            return Temp;
        }
    }
}

  前台 不显示   实际密码，点击 修改密码 ，显示 文本框，然后就可以设置新密码了。

后台如果 有接收 密码，则执行 ef_Help.ModifyWithOutproNames<TraderInfo>(post_model, "LoginPassward");   除了LoginPassward  以外的列 都会修改。

如果没有 接收到密码 就 执行 ef_Help.ModifyWithOutproNames<TraderInfo>(post_model);  修改所有列