EF结合SqlBulkCopy实现高效的批量数据插入 |EF插件EntityFramework.Extended实现批量更新和删除

原文链接:http://blog.csdn.net/fanbin168/article/details/51485969

 

批量插入 (17597条数据批量插入耗时1.7秒)

  1.  
    using System;
  2.  
    using System.Collections.Generic;
  3.  
    using System.Linq;
  4.  
    using System.Web;
  5.  
    using System.Web.Mvc;
  6.  
     
  7.  
    namespace MvcApplication1.Controllers
  8.  
    {
  9.  
    using MvcApplication1.Models;
  10.  
    using EntityFramework.Extensions;
  11.  
    using System.ComponentModel;
  12.  
    using System.Data;
  13.  
    using System.Data.SqlClient;
  14.  
    using System.Diagnostics;
  15.  
    public class HomeController : Controller
  16.  
    {
  17.  
    public ActionResult Index()
  18.  
    {
  19.  
    Stopwatch sw = new Stopwatch(); //计时器
  20.  
    sw.Start();//开始计时
  21.  
     
  22.  
    using (var db = new salesEntities())
  23.  
    {
  24.  
     
  25.  
    List<location> entitys = db.location.ToList(); //构建集合,到时候会将这个集合数据批量插入到
  26.  
     
  27.  
    if (db.Database.Connection.State != ConnectionState.Open)
  28.  
    {
  29.  
    db.Database.Connection.Open(); //打开Connection连接
  30.  
    }
  31.  
     
  32.  
    //调用BulkInsert方法,将entitys集合数据批量插入到数据库的tolocation表中
  33.  
    BulkInsert<location>((SqlConnection)db.Database.Connection, "tolocation", entitys);
  34.  
     
  35.  
    if (db.Database.Connection.State != ConnectionState.Closed)
  36.  
    {
  37.  
    db.Database.Connection.Close(); //关闭Connection连接
  38.  
    }
  39.  
    }
  40.  
     
  41.  
    sw.Stop(); //结束计时
  42.  
    string aa = sw.Elapsed.ToString();//批量插入了17597条数据。耗时1.7秒
  43.  
    return View();
  44.  
    }
  45.  
     
  46.  
     
  47.  
    /// <summary>
  48.  
    /// 批量插入
  49.  
    /// </summary>
  50.  
    /// <typeparam name="T">泛型集合的类型</typeparam>
  51.  
    /// <param name="conn">连接对象</param>
  52.  
    /// <param name="tableName">将泛型集合插入到本地数据库表的表名</param>
  53.  
    /// <param name="list">要插入大泛型集合</param>
  54.  
    public static void BulkInsert<T>(SqlConnection conn, string tableName, IList<T> list)
  55.  
    {
  56.  
    using (var bulkCopy = new SqlBulkCopy(conn))
  57.  
    {
  58.  
    bulkCopy.BatchSize = list.Count;
  59.  
    bulkCopy.DestinationTableName = tableName;
  60.  
     
  61.  
    var table = new DataTable();
  62.  
    var props = TypeDescriptor.GetProperties(typeof(T))
  63.  
     
  64.  
    .Cast<PropertyDescriptor>()
  65.  
    .Where(propertyInfo => propertyInfo.PropertyType.Namespace.Equals("System"))
  66.  
    .ToArray();
  67.  
     
  68.  
    foreach (var propertyInfo in props)
  69.  
    {
  70.  
    bulkCopy.ColumnMappings.Add(propertyInfo.Name, propertyInfo.Name);
  71.  
    table.Columns.Add(propertyInfo.Name, Nullable.GetUnderlyingType(propertyInfo.PropertyType) ?? propertyInfo.PropertyType);
  72.  
    }
  73.  
     
  74.  
    var values = new object[props.Length];
  75.  
    foreach (var item in list)
  76.  
    {
  77.  
    for (var i = 0; i < values.Length; i++)
  78.  
    {
  79.  
    values[i] = props[i].GetValue(item);
  80.  
    }
  81.  
     
  82.  
    table.Rows.Add(values);
  83.  
    }
  84.  
     
  85.  
    bulkCopy.WriteToServer(table);
  86.  
    }
  87.  
    }
  88.  
     
  89.  
    }
  90.  
    }


使用EF扩展EntityFramework.Extended 对数据进行批量更新,和批量删除

首先去nuget上下载EntityFramework.Extended插件(搜索:EntityFramework.Extended) 安装后,在项目中引入using EntityFramework.Extensions; 名称空间
 

批量更新(17597条数据,批量更新耗时1.69秒)

  1.  
    using System;
  2.  
    using System.Collections.Generic;
  3.  
    using System.Linq;
  4.  
    using System.Web;
  5.  
    using System.Web.Mvc;
  6.  
     
  7.  
    namespace MvcApplication1.Controllers
  8.  
    {
  9.  
    using MvcApplication1.Models;
  10.  
    using EntityFramework.Extensions; //使用EF的EntityFramework.Extended插件需要引入此名称空间
  11.  
    using System.Diagnostics;
  12.  
     
  13.  
    public class HomeController : Controller
  14.  
    {
  15.  
    public ActionResult Index()
  16.  
    {
  17.  
    salesEntities db = new salesEntities();
  18.  
     
  19.  
    Stopwatch sw = new Stopwatch(); //计时器
  20.  
    sw.Start();
  21.  
     
  22.  
    //调用插件的Update方法进行批量更新(不需要我们手动的db.SaveChanges()了)
  23.  
    //db.location.Update(r => new location { version = 123 });//批量将location表里version字段数据更新为123
  24.  
     
  25.  
    db.tolocation.Where(r => r.locId < 100).Update(c => new tolocation { version = 236 }); //也可以带条件批量修改
  26.  
     
  27.  
     
  28.  
    sw.Stop();
  29.  
    string aa = sw.Elapsed.ToString();//批量更新了17597条数据。耗时1.69秒
  30.  
    return View();
  31.  
    }
  32.  
    }
  33.  
    }


批量删除(17597条数据,批量删除耗时1.76秒)

    1.  
      using System;
    2.  
      using System.Collections.Generic;
    3.  
      using System.Linq;
    4.  
      using System.Web;
    5.  
      using System.Web.Mvc;
    6.  
       
    7.  
      namespace MvcApplication1.Controllers
    8.  
      {
    9.  
      using MvcApplication1.Models;
    10.  
      using EntityFramework.Extensions; //使用EF的EntityFramework.Extended插件需要引入此名称空间
    11.  
      using System.Diagnostics;
    12.  
       
    13.  
      public class HomeController : Controller
    14.  
      {
    15.  
      public ActionResult Index()
    16.  
      {
    17.  
      salesEntities db = new salesEntities();
    18.  
       
    19.  
      Stopwatch sw = new Stopwatch(); //计时器
    20.  
      sw.Start();
    21.  
       
    22.  
      //调用插件的Delete方法进行批量删除(不需要我们手动的db.SaveChanges()了)
    23.  
      //db.location.Delete(r => r.locId < 100000);
    24.  
       
    25.  
      db.location.Where(r => r.locId < 10000).Delete(); //当然我也可以这样写
    26.  
       
    27.  
       
    28.  
      sw.Stop();
    29.  
      string aa = sw.Elapsed.ToString();//批量删除了17597条数据。耗时1.76秒
    30.  
      return View();
    31.  
      }
    32.  
      }
    33.  
      }
    34.  

posted @ 2018-09-14 17:20  cnplayboy  阅读(226)  评论(0编辑  收藏  举报