How to pass login parameter (username, password) of database to crystal report from code

using CrystalDecisions.Reporting;
using CrystalDecisions.ReportSource;
using CrystalDecisions.Shared;
using CrystalDecisions.Web;
private void displayReport()
{
try
{
CrystalReportViewer1.EnableDatabaseLogonPrompt = false;
ConnectionInfo connInfo = new ConnectionInfo();
TableLogOnInfo tblLogInfo = new TableLogOnInfo();
TableLogOnInfos tblLogInfos = new TableLogOnInfos();
connInfo.UserID = "usrName";
connInfo.Password = "passwd";
connInfo.ServerName = "database";
tblLogInfo.ConnectionInfo = connInfo;
tblLogInfos.Add(tblLogInfo);
CrystalReportViewer1.LogOnInfo = tblLogInfos;
CrystalReportViewer1.EnableParameterPrompt = false;
CrystalReportSource1.ReportDocument.FileName=Server.MapPath ("Reports\\crystNewMain.rpt");
}
Catch
{
}
}