Crystal Reports asks for Username and Password while loading

first make ODBC connection to database and create Crystel report using that ODBC and Save.you can save that Crstel report in your debug folder and in any event you can load this report to your crystel report viwer.

string username = "sa"; // database user name
string password = "a12A!@"; //database password

ReportDocument cryRpt = new ReportDocument();

cryRpt.Load(@"Additional.rpt");
cryRpt.SetDatabaseLogon(username, password); //here usaer name and password for crystel report
reports.ReportSource = cryRpt;
reports.RefreshReport();
reports.Refresh();