Connection string in asp.net

Question

I am using connection string like this:

SqlConnection con = new SqlConnection("Data Source=DESKTOP-8L8G5P8\SQLEXPRESS;Initial Catalog=sai;User ID=sa); 

But it raises the error at the server name.

Answer 1

I think you have messed up somethings .Try this.It may work

SqlConnection con = new SqlConnection("Data Source=DESKTOP-8L8G5P8\\\\SQLEXPRESS;Initial Catalog=sai;User ID=sa;");

you have messed double slash(\\\\) and double quote(" ")