Having problems connecting to SQL Server in C#

问题

I am trying to connect to a SQL Server.

I am trying to use the SqlConnection object in C#, I've tried putting a domain before my username and I've tried with and without the portnumber

SqlConnection myConnection = new SqlConnection("user id=username;" +
                                   "password=xxxxx;" +
                                   "server=ipaddress:portnumber;" +
                                   "Trusted_Connection=yes;" +
                                   "database=databaseName; " +
                                   "connection timeout=30");

try
{
    myConnection.Open();
}
catch(Exception ex)
{
}

I don't get any error message, it just hangs at myConnection.Open

回答1:

You try connection string in this format. Please find this link for more info about connection string in c# link

    // To avoid storing the connection string in your code, 
    // you can retrieve it from a configuration file.
    SqlConnection myConnection = new SqlConnection("Data Source=ipaddress;
                                                  Initial Catalog=dbname;
                                                  User Id=userid; 
                                                  Password=pass;");

回答2:

As mentioned already in comments by @marc_s, port# must be specified in connection with comma, in your case it should like server=ipaddress,portnumber;.

However, these steps may help you to quickly troubleshoot connection issue with SQL Server

来源：https://stackoverflow.com/questions/57374313/having-problems-connecting-to-sql-server-in-c-sharp