/// <summary>
/// 批量更新
/// </summary>
private static void BatchUpdate()
{
IEnumerable <TestEntity> toUpdates = new List <TestEntity>();
// 获取所有数据
using (var context = new BatchDemoContext())
{
toUpdates = context.TestEntities.ToList();
}
// 所有的值 都为 1000
Parallel.ForEach(toUpdates,
(entity, state) =>
{ entity.RandomVlue = 1000; });
Stopwatch watch = new Stopwatch();
Console.WriteLine("开始更新计时,总共数据:{0}条", toUpdates.Count());
watch.Start();
using (var context = new BatchDemoContext())
{
EFBatchOperation.For(context, context.TestEntities).UpdateAll(toUpdates, x => x.ColumnsToUpdate(c => c.RandomVlue));
}
watch.Stop();
Console.WriteLine("结束更新计时,工用时:{0}ms", watch.ElapsedMilliseconds);
using (var context = new BatchDemoContext())
{
var count = context.TestEntities.Count();
Console.WriteLine("数据库总共数据:{0}条", count);
var minId = context.TestEntities.Min(c => c.Id);
// 随机取十条数据进行验证
for (int i = 1; i <= 10; i++)
{
Random Rand = new Random();
var id = Rand.Next(minId, minId + 100000);
var testdata = context.TestEntities.FirstOrDefault(c => c.Id == id);
Console.WriteLine("更新的数据 id:{0} randomvalue:{1}", testdata.Id, testdata.RandomVlue);
}
}
Console.WriteLine("-----------------华丽的分割线 更新-------------------------");
}
/// <summary>
/// 批量插入
/// </summary>
private static void BatchInster()
{
var datas = GetInsertDatas();
var testEntities = datas as IList <TestEntity> ?? datas.ToList();
Stopwatch watch = new Stopwatch();
Console.WriteLine("开始插入计时,总共数据:{0}条", testEntities.Count());
watch.Start();
using (var context = new BatchDemoContext())
{
EFBatchOperation.For(context, context.TestEntities)
.InsertAll(testEntities);
}
watch.Stop();
Console.WriteLine("结束插入计时,工用时:{0}ms", watch.ElapsedMilliseconds);
using (var context = new BatchDemoContext())
{
var count = context.TestEntities.Count();
Console.WriteLine("数据库总共数据:{0}条", count);
var minId = context.TestEntities.Min(c => c.Id);
// 随机取十条数据进行验证
for (int i = 1; i <= 10; i++)
{
Random rand = new Random();
var id = rand.Next(minId, minId + 100000);
var testdata = context.TestEntities.FirstOrDefault(c => c.Id == id);
Console.WriteLine("插入的数据 id:{0} randomvalue:{1}", testdata.Id, testdata.RandomVlue);
}
}
Console.WriteLine("-----------------华丽的分割线 插入-------------------------");
}
/// <summary>
/// 将id >= 1w 小于 5w 的随机值等于 500
/// </summary>
private static void BatchUpdateQuery()
{
Stopwatch watch = new Stopwatch();
Console.WriteLine("开始查询更新计时");
watch.Start();
using (var context = new BatchDemoContext())
{
var minId = context.TestEntities.Min(c => c.Id);
EFBatchOperation.For(context, context.TestEntities)
.Where(c => c.Id >= minId + 10000 && c.Id <= minId + 50000)
.Update(c => c.RandomVlue, rv => 500);
}
watch.Stop();
Console.WriteLine("结束查询更新计时,工用时:{0}ms", watch.ElapsedMilliseconds);
using (var context = new BatchDemoContext())
{
var count = context.TestEntities.Count();
Console.WriteLine("数据库总共数据:{0}条", count);
var minId = context.TestEntities.Min(c => c.Id);
// 随机取十条数据进行验证
for (int i = 1; i <= 10; i++)
{
Random rand = new Random();
var id = rand.Next(minId + 10000, minId + 50000);
var testdata = context.TestEntities.FirstOrDefault(c => c.Id == id);
Console.WriteLine("查询更新的数据 id:{0} randomvalue:{1}", testdata.Id, testdata.RandomVlue);
}
}
Console.WriteLine("-----------------华丽的分割线 查询更新-------------------------");
}
/// <summary>
/// 删除所有数据
/// </summary>
private static void BatchDelete()
{
Stopwatch watch = new Stopwatch();
Console.WriteLine("开始删除计时");
watch.Start();
using (var context = new BatchDemoContext())
{
EFBatchOperation.For(context, context.TestEntities)
.Where(c => c.Id >= 1).Delete();
}
watch.Stop();
Console.WriteLine("结束删除计时,工用时:{0}ms", watch.ElapsedMilliseconds);
using (var context = new BatchDemoContext())
{
var count = context.TestEntities.Count();
Console.WriteLine("数据库总共数据:{0}条", count);
}
Console.WriteLine("-----------------华丽的分割线 删除-------------------------");
}