尝试在C＃中打开（）SqlConnection时用户登录失败

Question

I'm using Sql Server 2017 and Visual Studio 2017. I transferred my database from my PC to my friend's laptop using Generate Scripts. I use the following code in my friend's laptop when trying to connect to said database in the laptop:

using (SqlConnection sqlCon = new SqlConnection(@"Data Source = (local); Initial Catalog = PresentasiDB; Integrated Security = True; Trusted_Connection = True;"))
            {              
                DataTable orderTable = new DataTable();                
                SqlDataAdapter sqlda;

                string insertOrder = "INSERT INTO \"Order\" DEFAULT VALUES";
                using (SqlCommand newOrder = new SqlCommand(insertOrder, sqlCon))
                {
                    sqlCon.Open();
                    newOrder.ExecuteNonQuery();
                }

                sqlda = new SqlDataAdapter("SELECT TOP 1 * FROM \"Order\" ORDER BY OrderID DESC", sqlCon);
                sqlda.Fill(orderTable);

                orderID = Convert.ToInt32(orderTable.Rows[0][0]);                
            }

However, this failed. The failure occurred in the sqlCon.Open() part. I've tried using SQL Server login Authentication and Windows Authentication. Both failed. Someone, please help me.

Answer 1

In the data source you need to specify server name you use to connect to sql server.

As shown in the screen the datasource here is "gaurav.goel

Answer 2

Try your connecting string something like this (for sa login)

string connstr = userid=sa;password=sapassword;server=localhost,1433;database=PresentasiDB;Trusted_Connection=no

To test it did you try entering the server as 'localhost' from management studio?