How to print datetimepicker to crystal report?

CommPercent objC = new CommPercent();

objC.MdiParent = this.MdiParent;

DataSet ds = new DataSet();

DataTable dt = new DataTable();

dt.Columns.Add("Date", typeof(String));

dt.Columns.Add("OPDNo", typeof(Int32));

dt.Columns.Add("Patientname", typeof(String));

dt.Columns.Add("Group", typeof(String));

dt.Columns.Add("Test", typeof(String));

dt.Columns.Add("Result", typeof(String));

dt.Columns.Add("Units", typeof(String));

dt.Columns.Add("Cost", typeof(Decimal));

dt.Columns.Add("Comm", typeof(Decimal));

foreach (DataGridViewRow dgr in dgv_Patients.Rows)

{

dt.Rows.Add(dgr.Cells["Date"].Value, dgr.Cells["OPDNo"].Value, dgr.Cells["Patientname"].Value, dgr.Cells["Group"].Value, dgr.Cells["Test"].Value, dgr.Cells["Result"].Value, dgr.Cells["Unit"].Value, dgr.Cells["Cost"].Value, dgr.Cells["Comm"].Value);

}

ds.Tables.Add(dt);

CommisionPercent cr = new CommisionPercent();

cr.SetDataSource(ds);

objC.crystalReportViewer1.ReportSource = cr;

objC.crystalReportViewer1.Refresh();

objC.Show();

 

This is for datagridview. I also want to print FromDate and ToDate from datetime picker. How to do it?