} // end btnClear_Click
// Checks if Product List is empty and, if not, copies the data for the
// ith Product to the appropriate group textboxes using the display sub.
// Also checks to determine if the next button should be enabled.
private void getItem(int i)
{
if (thisProductList.Count() == 0)
{
btnDelete.Enabled = false;
btnEdit.Enabled = false;
// btnToString.Enabled = false;
//lblUserMessage.Text = "Please select an operation";
}
else if (i < 0 || i >= thisProductList.Count())
{
MessageBox.Show("getItem error: index out of range");
return;
}
else
{
currentIndex = i;
//thisProductList.getAnItem(i).Display(this); // *****************
// thisOwlList.RemoveAt(i);
//lblUserMessage.Text = "Object Type: " + thisProductList.getAnItem(i).GetType().ToString() +
// " List Index: " + i.ToString();
btnFind.Enabled = true;
btnDelete.Enabled = true;
btnEdit.Enabled = true;
} // end else
} // end getItem
// This class manages s serializable file object by reading from and writing to a file
// Write the Product List to file as a serialized binary object
public static bool writeToFile(ProductList plist, string fn)
{
Stream thisFileStream;
BinaryFormatter serializer = new BinaryFormatter();
if (plist.Count() > 0)
{
try
{
thisFileStream = File.Create(fn);
}
catch (Exception ex)
{
MessageBox.Show("File open error: Owl Member List not written", "SFManager File Open");
MessageBox.Show(ex.ToString());
return(false);
} // end Try
try
{
serializer.Serialize(thisFileStream, plist);
MessageBox.Show("File write: Owl Member List was written to serializable file.");
}
catch (Exception ex)
{
MessageBox.Show("File write error: Owl Member List not written", "SFManager File Write");
MessageBox.Show(ex.ToString());
return(false);
}
finally
{
thisFileStream.Close();
} // end Try
}
else
{
MessageBox.Show("No Product in List");
}
// end if
return(true); // The file write succeeded
} // end WriteToFile