Try likes this ,
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
RadDatePicker.SelectedDate =
DateTime.Parse(da.GetDataKeyValue("PoDt").ToString());
}
}
If not working by this code , please check with
RadDatePicker.SelectedDate = DateTime.Now;
If it work with this , you have to check your retrieve data da.GetDataKeyValue("PoDt")
.
It may be in wrong datetime dataformat !