Passing parameters to crystal reports in C#

All that parameter code can be replaced with...

// Set datasource first
myDataReport.SetDataSource(...)
// Assign Paramters after set datasource
myDataReport.SetParameterValue("MyParameter", "Hello");

I can't remember if the order matters when setting the datasource and parameters. Maybe try setting the datasource first. The xsd/datasource has no relation to crystal parameters.

UPDATE1

SetParameterValue AFTER the datasource asignation or you will recieve error "Missing parameter values."

ReportDocument cryRpt = new ReportDocument();

TableLogOnInfos crtableLogoninfos = new TableLogOnInfos();
TableLogOnInfo crtableLogoninfo = new TableLogOnInfo();
ConnectionInfo crConnectionInfo = new ConnectionInfo();
Tables CrTables;

string path = "C:/reportpath/report.rpt";
cryRpt.Load(path);

cryRpt.SetParameterValue("MyDate2", str2);
cryRpt.SetParameterValue("MyDate", str1);

crConnectionInfo.ServerName = "server";
crConnectionInfo.DatabaseName = "DataBase";
crConnectionInfo.UserID = "user";
crConnectionInfo.Password = "password";

CrTables = cryRpt.Database.Tables;
foreach (CrystalDecisions.CrystalReports.Engine.Table CrTable in CrTables)
{
    crtableLogoninfo = CrTable.LogOnInfo;
    crtableLogoninfo.ConnectionInfo = crConnectionInfo;
    CrTable.ApplyLogOnInfo(crtableLogoninfo);
}

crystalReportViewer1.ReportSource = cryRpt;
crystalReportViewer1.Refresh();