Asp.Net Core 连接Mysql

上一篇文章里最后在VS里测试是没有问题的，但是在Windows命令行模式下会报错。

首先用dotnet restore命令的时候会出现error：

然后用dotnet run会出现警告，但是依旧会成功启动：

此时访问http://localhost:5000/user/query/2  时会报错：

其实在VS中也是有提示的：

只不过在VS中调试是不会报错的，问题就出在依赖项上，可以看看project.json这个文件，所有的依赖项都在这里：

{
  "dependencies": {
    "Microsoft.NETCore.App": {
      "version": "1.0.0-rc2-3002702",
      "type": "platform"
    },
    "Microsoft.AspNetCore.Diagnostics": "1.0.0-rc2-final",
    "Microsoft.AspNetCore.Mvc": "1.0.0-rc2-final",
    "Microsoft.AspNetCore.Razor.Tools": {
      "version": "1.0.0-preview1-final",
      "type": "build"
    },
    "Microsoft.AspNetCore.Server.IISIntegration": "1.0.0-rc2-final",
    "Microsoft.AspNetCore.Server.Kestrel": "1.0.0-rc2-final",
    "Microsoft.AspNetCore.StaticFiles": "1.0.0-rc2-final",
    "Microsoft.Extensions.Configuration.EnvironmentVariables": "1.0.0-rc2-final",

    "Microsoft.Extensions.Logging": "1.0.0-rc2-final",
    "Microsoft.Extensions.Logging.Console": "1.0.0-rc2-final",
    "Microsoft.Extensions.Logging.Debug": "1.0.0-rc2-final",
    "Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.0.0-rc2-final",
    "MySql.Data": "7.0.6-IR31",
    "Microsoft.Extensions.Configuration.Json": "1.0.0-rc2-final",
    "Dapper": "1.50.2"
  },

  "tools": {
    "Microsoft.AspNetCore.Razor.Tools": {
      "version": "1.0.0-preview1-final",
      "imports": "portable-net45+win8+dnxcore50"
    },
    "Microsoft.AspNetCore.Server.IISIntegration.Tools": {
      "version": "1.0.0-preview1-final",
      "imports": "portable-net45+win8+dnxcore50"
    }
  },

  "frameworks": {
    "netcoreapp1.0": {
      "imports": [
        "dotnet5.6",
        "dnxcore50",
        "portable-net45+win8"
      ]
    }
  },

  "buildOptions": {
    "emitEntryPoint": true,
    "preserveCompilationContext": true
  },

  "runtimeOptions": {
    "gcServer": true
  },

  "publishOptions": {
    "include": [
      "wwwroot",
      "Views",
      "appsettings.json",
      "web.config"
    ]
  },

  "scripts": {
    "prepublish": [ "npm install", "bower install", "gulp clean", "gulp min" ],
    "postpublish": [ "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%" ]
  }
}

那就把Microsoft.Extensions.Configuration.Json这个替换成新的吧，可以在

http://www.nuget.org/packages/Microsoft.Extensions.Configuration.Json/ 上查看版本信息，或者在VS中用包管理器选择最新的

更方便的方法是直接编辑project.json文件，会有自动提示：

选择最新包后在VS里重新生成是不会加载更新包的，需要在文件目录下使用dotnet restore命令来重新下载包，restore的时候还是会报错：

提示Mysql.Data 7.0.6-IR31与 .NETCoreApp,Version=v1.0 不兼容，此时用dotnet run运行直接就终止程序了：

此时单独改Microsoft.Extensions.Configuration还是会报错，那我直接把Microsoft.NETCore.App改成最新的：

"Microsoft.NETCore.App": {
      "version": "1.1.0-preview1-001100-00",
      "type": "platform"
    },

单独改这个估计其他的也得改，干脆一起都改了：

{
  "dependencies": {
    "Microsoft.NETCore.App": {
      "version": "1.1.0-preview1-001100-00",
      "type": "platform"
    },
    "Microsoft.AspNetCore.Diagnostics": "1.1.0-preview1-final",
    "Microsoft.AspNetCore.Mvc": "1.1.0-preview1-final",
    "Microsoft.AspNetCore.Razor.Tools": {
      "version": "1.0.0-preview1-final",
      "type": "build"
    },
    "Microsoft.AspNetCore.Server.IISIntegration": "1.1.0-preview1-final",
    "Microsoft.AspNetCore.Server.Kestrel": "1.1.0-preview1-final",
    "Microsoft.AspNetCore.StaticFiles": "1.1.0-preview1-final",
    "Microsoft.Extensions.Configuration.EnvironmentVariables": "1.1.0-preview1-final",
    "Microsoft.Extensions.Logging": "1.1.0-preview1-final",
    "Microsoft.Extensions.Logging.Console": "1.1.0-preview1-final",
    "Microsoft.Extensions.Logging.Debug": "1.1.0-preview1-final",
    "Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.1.0-preview1-final",
    "MySql.Data": "7.0.6-IR31",
    "Microsoft.Extensions.Configuration.Json": "1.1.0-preview1-final",
    "Dapper": "1.50.2"
  },

  "tools": {
    "Microsoft.AspNetCore.Razor.Tools": {
      "version": "1.0.0-preview1-final",
      "imports": "portable-net45+win8+dnxcore50"
    },
    "Microsoft.AspNetCore.Server.IISIntegration.Tools": {
      "version": "1.0.0-preview1-final",
      "imports": "portable-net45+win8+dnxcore50"
    }
  },

  "frameworks": {
    "netcoreapp1.0": {
      "imports": [
        "dotnet5.6",
        "dnxcore50",
        "portable-net45+win8"
      ]
    }
  },

  "buildOptions": {
    "emitEntryPoint": true,
    "preserveCompilationContext": true
  },

  "runtimeOptions": {
    "gcServer": true
  },

  "publishOptions": {
    "include": [
      "wwwroot",
      "Views",
      "appsettings.json",
      "web.config"
    ]
  },

  "scripts": {
    "prepublish": [ "npm install", "bower install", "gulp clean", "gulp min" ],
    "postpublish": [ "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%" ]
  }
}

resotre的时候依然会提示不兼容，但此时dotnet run可以正常运行了：

在浏览器输入http://localhost:5000/user/query/1 也能正常出结果了。

这里restore报错的问题我想可能是VS版本造成的，我这个项目是在VS 2015 update2 下创建的，我把VS2015升级到Update3后重新创建项目就没有这个错误。

接下来把Asp.Net Core程序发布到CentOS上测试：

使用XFtp把src目录下的文件夹上传到CentOS上，在CentOS里cd到程序目录下，运行dotnet restore，完成后运行dotnet run，发现报错了：

这个时候需要把复制过去的project.lock.json文件删除，然后再运行dotnet restore，完成后运行dotnet run，编译通过：

因为CentOS上的dotnet版本不是最新的，更新下成最新的，到

https://github.com/dotnet/core/ 上找到最新版本

wget https://dotnetcli.blob.core.windows.net/dotnet/release/1.1.0/Binaries/Latest/dotnet-centos-x64.latest.tar.gz
tar zxf dotnet.tar.gz -C /opt/dotnet

重新运行dotnet run：

还是不行，这就郁闷了，那再把版本改低点吧：

{
  "dependencies": {
    "Microsoft.NETCore.App": {
      "version": "1.0.1",
      "type": "platform"
    },
    "Microsoft.AspNetCore.Diagnostics": "1.0.0",
    "Microsoft.AspNetCore.Mvc": "1.0.1",
    "Microsoft.AspNetCore.Razor.Tools": {
      "version": "1.0.0-preview1-final",
      "type": "build"
    },
    "Microsoft.AspNetCore.Server.IISIntegration": "1.0.0",
    "Microsoft.AspNetCore.Server.Kestrel": "1.0.1",
    "Microsoft.AspNetCore.StaticFiles": "1.0.0",
    "Microsoft.Extensions.Configuration.EnvironmentVariables": "1.0.0",
    "Microsoft.Extensions.Logging": "1.0.0",
    "Microsoft.Extensions.Logging.Console": "1.0.0",
    "Microsoft.Extensions.Logging.Debug": "1.0.0",
    "Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.1.0-preview1-final",
    "MySql.Data": "7.0.6-IR31",
    "Microsoft.Extensions.Configuration.Json": "1.0.0",
    "Dapper": "1.50.2"
  },

  "tools": {
    "Microsoft.AspNetCore.Razor.Tools": {
      "version": "1.0.0-preview1-final",
      "imports": "portable-net45+win8+dnxcore50"
    },
    "Microsoft.AspNetCore.Server.IISIntegration.Tools": {
      "version": "1.0.0-preview1-final",
      "imports": "portable-net45+win8+dnxcore50"
    }
  },

  "frameworks": {
    "netcoreapp1.0": {
      "imports": [
        "dotnet5.6",
        "dnxcore50",
        "portable-net45+win8"
      ]
    }
  },

  "buildOptions": {
    "emitEntryPoint": true,
    "preserveCompilationContext": true
  },

  "runtimeOptions": {
    "gcServer": true
  },

  "publishOptions": {
    "include": [
      "wwwroot",
      "Views",
      "appsettings.json",
      "web.config"
    ]
  },

  "scripts": {
    "prepublish": [ "npm install", "bower install", "gulp clean", "gulp min" ],
    "postpublish": [ "dotnet publish-iis --publish-folder %publish:OutputPath% --framework %publish:FullTargetFramework%" ]
  }
}

重新resotre run，正常了，在终端输入：

curl http://localhost:5000

可以看到首页的源码了。

再输入curl http://localhost:5000/user/getname/1：

终于成功了！这里的地址我是用的另外一个项目，上一篇文章的项目地址应该是：http://localhost:5000/user/query/1

把现在项目的源码也放上来吧，除了Controller外没别的变化：

public class UserController : Controller
    {
        private static MySql.Data.MySqlClient.MySqlConnection GetMySqlConnection(bool open = true,
            bool convertZeroDatetime = false, bool allowZeroDatetime = false)
        {

            string cs = "Server=10.255.19.111;Database=mydb;Uid=root;Pwd=yourpassword;";
            var csb = new MySql.Data.MySqlClient.MySqlConnectionStringBuilder(cs);
            csb.AllowZeroDateTime = allowZeroDatetime;
            csb.ConvertZeroDateTime = convertZeroDatetime;
            var conn = new MySql.Data.MySqlClient.MySqlConnection(csb.ConnectionString);
            if (open) conn.Open();
            return conn;
        }
        // GET: /<controller>/
        public IActionResult Index()
        {
            return View();
        }
        public IActionResult GetName(int id)
        {
            string name = "";
            using (var connection = GetMySqlConnection())
            {
                var user = connection.QueryFirstOrDefault<User>("select * from User where id=@Id;", new { Id = id });
                if (user != null)
                    name = user.Name;
                return Content(name);
            }
        }
    }

下面需要从外部访问了，可以参考我之前的帖子：

使用.Net Core发布可从外部访问的网站

当然需要先把5000端口打开：

firewall-cmd --zone=/tcp --permanent
firewall-cmd --reload 

在Program的Main方法中加入：

.UseKestrel().UseUrls("http://*:5000")

重启程序dotnet restore   dotnet run

在Windows下访问：http://10.255.19.111:5000/

能看到首页了，此时可以看到CentOS里面的运行状态：

再打开http://10.255.19.111:5000/user/getname/2

至此就算圆满完成了！