string cn = "Data Source=192.168.0.249;User ID=yydba;Password=yydbo;Initial Catalog=yydb"
SqlConnection oSQLConn = new SqlConnection();
oSQLConn.ConnectionString = cn;
oSQLConn.Open();
string strInsert = " INSERT INTO login ( users,password) VALUES ( '";
strInsert += blacklist.Text + "', '";
strInsert += blacklist.Text + " ')";
SqlCommand inst = new SqlCommand(strInsert, oSQLConn);
inst.ExecuteNonQuery();