一. SqlSugar 连接MySQL数据库

 public class MySqlCNHelper : Singleton<MySqlCNHelper>{public static SqlSugarClient CnDB;public void InitDB() {//--------------------MySQL--------------------CnDB = new SqlSugarClient(new ConnectionConfig(){ConnectionString = "server=127.0.0.1;uid=root;pwd=zhumengxy;database=fish",DbType = DbType.MySql,IsAutoCloseConnection = true,InitKeyType = InitKeyType.Attribute });//--------------------SQL Server--------------------//mDB = new SqlSugarClient(new ConnectionConfig()//{//    ConnectionString = "Data Source=your_server_name;Initial                            //    Catalog=your_database_name;User                 //          ID=your_username;Password=your_password",//DbType = DbType.SqlServer,//    IsAutoCloseConnection = true,  // 查询完毕后自动关闭连接//})CnDB.Aop.OnLogExecuting = (sql, pars) =>{Console.WriteLine(sql + "\r\n" +mDB.Utilities.SerializeObject(pars.ToString()));Console.WriteLine();};}
}

二.  数据库操作

//插入
public async Task<bool> InsertRecordProModel(RecordProModel recordPro) => await CnDB.Insertable(recordPro).ExecuteCommandAsync() > 0;//查询1
public async Task<List<T>> QueryDataList<T>() => await CnDB.Queryable<T>().ToListAsync();//查询2
public async Task<List<AllotModel>> QueryAllotModelList(AllotModel allot) => await CnDB.Queryable<AllotModel>().Where(t => t.EsamNo == allot.EsamNo || t.ProdOrderNo == allot.ProdOrderNo).ToListAsync();//查询3
public async Task<bool> QueryUserModelIsExists(UserModel user) => await CnDB.Queryable<UserModel>().Where(t => t.UserName == user.UserName && t.PassWord == user.PassWord).AnyAsync();//删除
public async Task<bool> DeleteRecordProModelBW(int id) => await CnDB.Deleteable<RecordProModel>().Where(t => t.ID == id).ExecuteCommandAsync() > 0;//更新
public async void UpdateData(int id ,string esamNo)
{AllotModel userData = await CnDB.Queryable<AllotModel>().Where(t => t.ID == id).FirstAsync();if (userData != null){userData.EsamNo = esamNo;await CnDB.Updateable(userData).ExecuteCommandAsync();}
}

三.  Singleton类

public class Singleton<T> where T : class, new()
{private static T _instance;private static readonly object syslock = new object();public static T Instance(){if (_instance == null){lock (syslock){if (_instance == null){_instance = new T();}}}return _instance;}
}

四、AllotModel 类

 public class AllotModel{private int Id;public int ID{get { return Id; }set { Id = value;}}private string esamNo = "";public string EsamNo{get { return esamNo; }set { esamNo = value;}}private AppModel appInfo = new AppModel(); public AppModel AppInfo{get { return appInfo; }set { appInfo = value; }}private string cipherTxt = ""; public string CipherTxt{get { return cipherTxt; }set { cipherTxt = value;}}private string repetitions; public string Repetitions{get { return repetitions; }set { repetitions = value;}}private string prodOrderNo = "";public string ProdOrderNo{get { return prodOrderNo; }set { prodOrderNo = value; }}}

五.  使用

bool blRet = await MySqlCNHelper.Instance().InsertRecordProModel(model);

var List1 = await  MySqlCNHelper.Instance().QueryDataList();

var List2 = await  MySqlCNHelper.Instance().QueryAllotModelList(model);

bool blRet = await  MySqlCNHelper.Instance().QueryUserModelIsExists(model);

六、结果如下

七、下载地址：使用SqlSugar操作MySQL/SQLServer数据库资源-CSDN文库

八、完结