// This class manages a 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
} // end WriteToFile
// Read the Product List from file as a serialized binary object
public static bool readFromFile(ref ProductList plist, string fn) //on load
{
Stream TestFileStream;
BinaryFormatter deserializer = new BinaryFormatter();
if (File.Exists(fn))
{
try
{
TestFileStream = File.OpenRead(fn);
}
catch (Exception ex)
{
MessageBox.Show("File open error: Open with new Product List", "SFManager, File Open Error");
plist = new ProductList();
return(false);
} // end Try
try
{
plist = (ProductList)deserializer.Deserialize(TestFileStream);
}
catch (Exception ex)
{
MessageBox.Show("File read error: Open with new Product List", "SFManager File Read");
plist = new ProductList();
return(false);
}
finally
{
TestFileStream.Close();
} // end Try
} // end then part of if
else
{
MessageBox.Show("File does not exist: Open with new Product List", "SF Manager Does Not Exist ");
plist = new ProductList();
} // end if
return(true); // The file read succeeded
} // end readFromFile