Question

我的网站有很多请求，我的数据库连接类有问题在请求程序连接到数据库时另一个请求来和系统错误。我的班级在这里

    cmd=new SqlCommand();
    con=new SqlConnection();
    SqlCommand cmdLog = new SqlCommand();
    string cns = "";
    if(MABP.GetdomainUrl()=="localhost")
    {
        cns=ConfigurationManager.ConnectionStrings["ConnectionStringClient"].ToString();
    } else
    {
        cns=ConfigurationManager.ConnectionStrings["ConnectionStringServer"].ToString();
    }
    con.ConnectionString=cns;
    cmd.Connection=con;
    cmdLog.Connection=con;
    try
    {
        cmd.CommandText = Query;
        DataTable dt = new DataTable();
        SqlDataAdapter da = new SqlDataAdapter();
        da.SelectCommand=cmd;
        while(con.State==ConnectionState.Connecting)
        {
        }
        if(ConnectionState.Open!=con.State)
        {
            con.Open();
        }
        da.Fill(dt);
        while(con.State==ConnectionState.Connecting)
        {
        }
        if(ConnectionState.Closed!=con.State)
        {
            con.Close();
        }
        con.Dispose();
        cmd.Dispose();
        return dt;
    } catch(Exception e)
    {
        return null;
    }

我希望你能帮助我

Answer 1

试试这个：

            string sql = "select ....";
            string whereToConnect = MABP.GetdomainUrl()=="localhost" ? "ConnectionStringClient" : "ConnectionStringServer";
            string connectionString = ConfigurationManager.ConnectionStrings[whereToConnect].ToString();
            var dt = new DataTable();

            using (var connection = new SqlConnection(connectionString))
            {
                using (var adapter = new SqlDataAdapter(sql, connection))
                {
                    try
                    {
                        adapter.Fill(dt);
                    }
                    catch
                    { 
                        // Deal with exceprion if you want 
                    }
                }
            }

            return dt;

程序连接到我的网站上的SQL服务器有很多请求

1 个答案: