/// <summary>
/// Handles the ElementsFetched event of the LLBLGenProDataSource
/// Use it in case of empty data. To change the mode of the FormView to the InsertMode.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void OrdersDS_ElementsFetched(object sender, EventArgs e)
{
// if there are no orders, go to Insert Mode of the FormView
// and hide the Order-Details Grid and the total summary.
if (OrdersDS.EntityCollection.Count <= 0)
{
OrdersFormView.ChangeMode(FormViewMode.Insert);
OrderDetailsGridView.Visible = false;
TotalAmount.Visible = false;
}
}
/// <summary>
/// Calculates the Total Order Amount.
/// By summing the totals of all order-detail lines in addition to the freight value of the order.
/// </summary>
private void CalculateOrderTotalAmount()
{
string freightText = string.Empty;
// Get the Freight amount from the FormView
// If the GridView is in the ReadOnly mode then the Freight will be written in a label.
if (OrdersFormView.CurrentMode == FormViewMode.ReadOnly)
{
Label control = (Label)OrdersFormView.FindControl("Freight");
if (control != null)
{
freightText = control.Text;
}
}
// Else the Freight will be written in a TextBox.
else
{
TextBox control = (TextBox)OrdersFormView.FindControl("Freight");
if (control != null)
{
freightText = control.Text;
}
}
decimal freight = 0;
decimal totalAmount = 0;
if (decimal.TryParse(freightText, System.Globalization.NumberStyles.Currency, null, out freight))
{
totalAmount += freight;
}
// Sum all order-details total values.
foreach (OrderDetailEntity orderDetail in OrderDetailsDS.EntityCollection)
{
totalAmount += orderDetail.Total;
}
TotalAmount.Text = "Order total amount including freight = " + totalAmount.ToString("$ #,#0.##");
}
