报这个错：ConnectionString 属性尚未初始化。

AppConfig.DB.DefaultConn = "Server=10.3.4.125,8001;Database=FY_YYFLXT;User Id=ypflxt;Password=ypflxt66061436;";// "Data Source={0}demo.db;failifmissing=false;";

        MProc proc = new MProc(" UPDATE kct02 SET  kcczzt = 'E'  WHERE  kcckdm ='XDZZ'  and kcczzt <> 'E' ", "Server=10.3.4.125,8001;Database=FY_YYFLXT;User Id=ypflxt;Password=ypflxt66061436;");
        int result = proc.ExeNonQuery();   // 报这个错：ConnectionString 属性尚未初始化。![](https://img2022.cnblogs.com/q/683319/202201/683319-20220128172101887-1488594525.png)

回答

不清楚，不过，你还不如直接使用ADO.NET呢

        System.Data.SqlClient.SqlConnection con = new System.Data.SqlClient.SqlConnection("Server=10.3.4.125,8001;Database=FY_YYFLXT;User Id=ypflxt;Password=ypflxt66061436;");
        System.Data.SqlClient.SqlCommand cmd = new System.Data.SqlClient.SqlCommand("UPDATE kct02 SET  kcczzt = 'E'  WHERE  kcckdm ='XDZZ'  and kcczzt <> 'E'");
        cmd.Connection = con;
        con.Open();
        int result = cmd.ExecuteNonQuery();
        con.Close();