private void btnClear_Click(object sender, EventArgs e)
{
document = null;
CrViewer.ReportSource = null;
dtpFromDate.Value = DateTime.Now;
dtpToDate.Value = DateTime.Now;
txtSOrderNo.Text = string.Empty;
SelectedSO = string.Empty;
txtProductCode.Text = string.Empty;
txtProductName.Text = string.Empty;
cmbWarehouse.SelectedIndex = 0;
//LookUpEdit.EditValue = -1;
gridLookUpEdit1View.ClearSelection();
LookUpEdit.Text = "";
LookUpEdit.EditValue = null;
LookUpEdit.RefreshEditValue();
chkAlldate.Checked = true;
dtpAsOn.Value = DateTime.Now;
dtpFromDate.Focus();
}