// SQL部分
第 1 行:string dd = "Data Source=.\SQLEXPRESS;AttachDbFilename="C:\Users\HEX\Documents\Visual Studio 2008\Projects\cventry_address_book_0.1\cventry_address_book_0.1\addressbook.mdf";Integrated Security=True;Connect Timeout=30;User Instance=True";
第 2 行:SqlConnection sqlconobj = new SqlConnection(dd);
第 3 行:sqlconobj.Open();
---------错误输出------------
意外字符'\'