使用 SQL 服务器连接字符串出现错误

Question

public void DataGrid_Data()
{
    // 2 second delay before loading DataGrid
    var timer = new DispatcherTimer { Interval = TimeSpan.FromSeconds(2) };
    timer.Start();
    timer.Tick += (sender, args) =>
        {
            timer.Stop();

            // Attempt to connect to SQL Server database and populate DataGrid with database tables. 
            try
            {
                string connectionString = (@"Data Source=ComputerName\SQLEXPRESS;Initial Catalog=CustomerRelations;Integrated Security=True;");
                SqlConnection connection = new SqlConnection(connectionString);

                SqlCommand cmd = new SqlCommand("SELECT `hb_disputes`.`DSP_ID`, `hb_disputes`.`ACCOUNT`, `hb_disputes`.`CUST_NAME`,`hb_disputes`.`PREM_ADDR`, `hb_status`.`Status`, `hb_disputes`.`OPENED`, `hb_disputes`.`DEADLINE`, `hb_rpttype`.`ReportType`, `hb_ratetype`.`Rate Type`FROM `hb_disputes` LEFT JOIN `hb_status` ON `hb_disputes`.`STATUS` = `hb_status`.`STSID` LEFT JOIN `hb_rpttype` ON `hb_disputes`.`RPTTYPE` = `hb_rpttype`.`RPTID` LEFT JOIN `hb_ratetype` ON `hb_disputes`.`REV_CLS` = `hb_ratetype`.`RTID`; ", connection);
                connection.Open();

                DataTable dt = new DataTable();
                dt.Load(cmd.ExecuteReader());

                connection.Close();

                dtGrid.DataContext = dt;
            }
            catch
            {
                MessageBox.Show("Database connection is not available at this time. Please contact your database administrator ");
            }
        };
}

I've been using MYSQL for my application and I decided to switch to SQL Server. I rebuilt the database in SQL Server and connected it to Visual Studio, which provided me my connection string. However, since there is a "\" between the computer name and SQLEXPRESS I am getting an

Unrecognized escape sequence

error. I've tried using "@" and "\" but I am still not able to connect to the database. I also just simply replaced my MySqlCommand with SqlCommand .

Answer 1

From this

   string connectionString = (@"Data Source=ComputerName\SQLEXPRESS;Initial Catalog=CustomerRelations;Integrated Security=True;");

To

   string connectionString = ("Data Source=ComputerName\\SQLEXPRESS;Initial Catalog=CustomerRelations;Integrated Security=True;");

Let me know if it helps

2 backslashes

Answer 2

Welcome to the site... From my C#/SQL-Server work, My connection string is different such as

Server=myServerName\theInstanceName; Database=myDataBase; Trusted_Connection=yes;

as compared to your

Data Source=ComputerName\SQLEXPRESS;Initial Catalog=CustomerRelations;Integrated Security=True;

Not sure if that is what the problem is for your connection.