Visual Studio社区版中的连接字符串

Question

Getting an error

keyword not supported error

from SQL Server when I try to open a connection - I am using Visual Studio 2013 Community edition.

static class datastuff
{
    public static void makeconnection()
    string constr = @"data source=(LocalDB)\v11.0;" + @"C:\Users\leon3\Documents\Visual Studio 2013\Projects\WindowsApplication1\WindowsApplication1\sqlserver.mdf;integrated security=True;connect timeout=30";

    SqlConnection con = new SqlConnection(constr);
    con.Open()
}

Answer 1

It seems that you forget an essential part of the connection string when you want to specify a file name

string constr = @"data source=(LocalDB)\v11.0;
                  AttachDBFileName=C:\Users\leon3\Documents\Visual Studio 2013\Projects\WindowsApplication1\WindowsApplication1\sqlserver.mdf;
                  integrated security=True;connect timeout=30";

Answer 2

This has nothing to do with Visual Studio.

Your connection string is like this:

data source=(LocalDB)\v11.0;C:\Users\leon3\Documents\Visual Studio 2013\Projects\WindowsApplication1\WindowsApplication1\sqlserver.mdf;integrated security=True;connect timeout=30

That thing after the data source: (LocalDB)\\V11; will be your source, while the database itself (the mdf file) will be just something the connection will not understand.

Maybe something like this will work:

string constr = @"data source=(LocalDB)\V11;" + @"AttachDbFileName=C:\Users\leon3\Documents\Visual Studio 2013\Projects\WindowsApplication1\WindowsApplication1\sqlserver.mdf;integrated security=True;connect timeout=30";