MVC lambda+EF的简单的增删查改

MVC里面，用labmda表达时候操作EF进行增删查改的方法，非常适用与初学者。主要打断点调试，看DAL里面的东西，这样才能学得到。 数据库，可以通过模型生成。 有问题的 下载了再问我

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

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

        }
    }
}

 属性            大小     日期    时间   名称
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     目录           0  2018-10-26 11:06  HxjlearGet\
     目录           0  2018-10-25 09:46  HxjlearGet\.vs\
     目录           0  2018-10-25 09:46  HxjlearGet\.vs\HxjlearGet\
     目录           0  2018-10-25 09:47  HxjlearGet\.vs\HxjlearGet\v15\
     文件      176640  2018-10-29 17:11  HxjlearGet\.vs\HxjlearGet\v15\.suo
     目录           0  2018-10-25 09:47  HxjlearGet\.vs\HxjlearGet\v15\Server\
     目录           0  2018-10-25 09:47  HxjlearGet\.vs\HxjlearGet\v15\Server\sqlite3\
     文件           0  2018-10-25 09:47  HxjlearGet\.vs\HxjlearGet\v15\Server\sqlite3\db.lock
     文件     1191936  2018-10-25 15:04  HxjlearGet\.vs\HxjlearGet\v15\Server\sqlite3\storage.ide
     文件       32768  2018-10-29 17:09  HxjlearGet\.vs\HxjlearGet\v15\Server\sqlite3\storage.ide-shm
     文件     4124152  2018-10-29 17:11  HxjlearGet\.vs\HxjlearGet\v15\Server\sqlite3\storage.ide-wal
     目录           0  2018-10-25 09:46  HxjlearGet\.vs\config\
     文件       83191  2018-10-25 09:46  HxjlearGet\.vs\config\applicationhost.config
     目录           0  2018-10-26 11:06  HxjlearGet\ConsoleApplication\
     文件         189  2018-10-26 11:06  HxjlearGet\ConsoleApplication\App.config
     文件        2386  2018-10-26 11:06  HxjlearGet\ConsoleApplication\ConsoleApplication.csproj
     文件         260  2018-10-26 11:06  HxjlearGet\ConsoleApplication\Program.cs
     目录           0  2018-10-26 11:06  HxjlearGet\ConsoleApplication\Properties\
     文件        1334  2018-10-26 11:06  HxjlearGet\ConsoleApplication\Properties\AssemblyInfo.cs
     目录           0  2018-10-26 11:06  HxjlearGet\ConsoleApplication\bin\
     目录           0  2018-10-29 17:12  HxjlearGet\ConsoleApplication\bin\Debug\
     目录           0  2018-10-26 11:06  HxjlearGet\ConsoleApplication\obj\
     目录           0  2018-10-26 11:06  HxjlearGet\ConsoleApplication\obj\Debug\
     文件          42  2018-10-26 11:06  HxjlearGet\ConsoleApplication\obj\Debug\ConsoleApplication.csproj.CoreCompileInputs.cache
     文件        8077  2018-10-26 11:06  HxjlearGet\ConsoleApplication\obj\Debug\ConsoleApplication.csprojAssemblyReference.cache
     文件        6791  2018-10-26 11:06  HxjlearGet\ConsoleApplication\obj\Debug\DesignTimeResolveAssemblyReferencesInput.cache
     目录           0  2018-10-29 17:12  HxjlearGet\ConsoleApplication\obj\Debug\TempPE\
     文件           0  2018-10-26 11:06  HxjlearGet\ConsoleApplication\obj\Debug\TemporaryGeneratedFile_036C0B5B-1481-4323-8D20-8F5ADCB23D92.cs
     文件           0  2018-10-26 11:06  HxjlearGet\ConsoleApplication\obj\Debug\TemporaryGeneratedFile_5937a670-0e60-4077-877b-f7221da3dda1.cs
     文件           0  2018-10-26 11:06  HxjlearGet\ConsoleApplication\obj\Debug\TemporaryGeneratedFile_E7A71F73-0F8D-4B9B-B56E-8E70B10BC5D3.cs
     目录           0  2018-10-29 17:10  HxjlearGet\DAL\
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