public void button2_Click(object sender, EventArgs e) // Retrieve Button on click event
{
// selecting or typing a valid order id and displaying the results
try
{
int orderID = Convert.ToInt32(cborderId.Text);
Orders myOrder = OrdersDB.GetOrders(orderID);
List <OrderDetails> myOrderDetails = OrderDetailsDB.GetOrderDetails(orderID);
if (Object.Equals(myOrder, null)) // if ordr id not valid, show the follofing message
{
MessageBox.Show("No matching Order Id's found, please provide a valid Order ID", "Order ID Error");
}
else // else display all the fields and read only order details data grid form
{
displayOrder(myOrder);
displayOrderDetails(myOrderDetails);
calculateTotalprice();
}
}
catch (FormatException) // catching the wrong format order id exception, in case user types an alphabet or anything other than the valid id
{
MessageBox.Show("Select from the drop down list and Retrieve.", "Input Error");
}
}
public void UpdateShipDate(object sender, EventArgs e) // update ship date method
{
try
{
// setting the orderid to accept null values by using nullable datetime values
int orderID = Convert.ToInt32(cborderId.Text);
DateTime?NewShippedDate;
if (String.IsNullOrEmpty(txtShipDate.Text))
{
NewShippedDate = null;
}
else
{
NewShippedDate = DateTime.Parse(txtShipDate.Text);
}
// adding validation for new shipped date to be between order date and requird date
DateTime?RequiredDate = Convert.ToDateTime(txtReqDate.Text);
DateTime?Orderdate = Convert.ToDateTime(txtOrderDate.Text);
if (RequiredDate >= NewShippedDate && Orderdate <= NewShippedDate)
{
OrdersDB.UpdateShippingDate(NewShippedDate, orderID); // method to update shipping value
MessageBox.Show("Shipped Date Updated", "Update");
}
else if (RequiredDate < NewShippedDate)
{
MessageBox.Show("Shipped Date can not be ahead of Required Date.", "Date Error");
Form1_Load(sender, e);
}
else if (Orderdate > NewShippedDate)
{
MessageBox.Show("Shipped Date can not be earlier than the Order Date", "Date Error");
}
else if (NewShippedDate == null) //method to update new shipped date with null values
{
OrdersDB.UpdateShippingDate(orderID); // using the same method name with different signatures
MessageBox.Show("Null value Added.", "Null Value");
}
else
{
MessageBox.Show("Shipped Date not acceptable.", "Incorrect Syntax");
}
}
catch (FormatException) // catching the shipped date format exception incase it's in a wrong format
{
MessageBox.Show("Select from the drop down list and Retrieve. Use the correct format for date MM/DD/YYYY.", "Input Error");
}
}
