雪花

七、.net core下配置、数据库访问等操作实现

配置读取

.net core下读取配置还是有点麻烦的,本身没有System.Configuration.dll,所以在进行配置前需要自行引用Microsoft.Extensions.Configuration,如下:

 

 

这样的话我们就可以配置读取的相关编码了,比如我们数据库的链接字符串,在appsettings.json添加对应的数据库配置:

 "ConnectionStrings": {
    "TestDb": "server=localhost;port=3306;database=mytest;user=test;password=123456;charset=utf8;"
  }

  

 

读取配置相关代码如下:

public class AppSetting
{
    private static readonly object objLock = new object();
    private static AppSetting instance = null;

    private IConfigurationRoot Config { get; }

    private AppSetting()
    {
        var builder = new ConfigurationBuilder()
            .SetBasePath(Directory.GetCurrentDirectory())
            .AddJsonFile("appsettings.json", optional: false, reloadOnChange: true);
        Config = builder.Build();
    }

    public static AppSetting GetInstance()
    {
        if (instance == null)
        {
            lock (objLock)
            {
                if (instance == null)
                {
                    instance = new AppSetting();
                }
            }
        }

        return instance;
    }

    public static string GetConfig(string name)
    {
        return GetInstance().Config.GetSection(name).Value;
    }
}

这样就可以直接读取对应的配置信息啦:

string CONNECTION_STRING = AppSetting.GetConfig("ConnectionStrings:TestDb");

  

 

数据库操作

数据库相关操作还是建议使用Dapper以及Dapper.Contrib,比较轻量,也比较方便。

 

创表

CREATE TABLE friends ( id INT ( 3 ) NOT NULL, NAME VARCHAR ( 8 ) NOT NULL, pass VARCHAR ( 20 ) NOT NULL );
INSERT INTO friends
VALUES
	( '004', '王六', 'dasd' );
SELECT
	* 
FROM
	friends

  

 

posted @ 2019-03-21 18:49  十色  阅读(299)  评论(0编辑  收藏  举报