Question

Hello I’m trying to run a simple sql command on a DB from MS VS C# 2010 and I have encountered a error I have never seen before the relevant code is:

  SqlConnection comCon = new SqlConnection(@"Data Source=C:\\Users\\George\\Desktop\\programming\\C#workspace\\Projects\\Examen\\Examen\\Companie.mdf;Initial Catalog=Proiect;Integrated Security=True"); 

  SqlCommand cmd = new SqlCommand();

  cmd.CommandText =  "UPDATE Proiect SET Buget = Buget + 500 WHERE (Buget > 0)";

  cmd.Connection = comCon;                                                      
  comCon.Open();
  Console.WriteLine(cmd.ExecuteNonQuery().ToString());
  comCon.Close();

And the error is Keyword not supported: ‘data source’

The main problem is that I’m not used to creating these sqlconnections by hand so please tell me if I’m missing something.

Answer 1

You are using the wrong structure. To attach a database file, you need to use the following structure:

SqlConnection sqlConnection = 
    "Server=DatabaseServerName;AttachDbFilename=d:\Database\Database.mdf;
     Database=DatabaseName; Trusted_Connection=Yes";

You need to have the right permissions on both the target file and database server to attach the databse and establish the connection.