} // end WriteToFile
// Read the Person List from file as a serialized binary object
public static bool readFromFile(out PersonListClass plist, string fn)
{
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 Person List", "POManager, File Open");
plist = new PersonListClass();
return(false);
} // end Try
try
{
plist = (PersonListClass)deserializer.Deserialize(TestFileStream);
// pl = CType(deserializer.Deserialize(TestFileStream), PersonList);
// MsgBox("File open: Person loaded to List");
}
catch (Exception ex)
{
MessageBox.Show("File read error: Open with new Person List", "POManager File Read");
plist = new PersonListClass();
return(false);
}
finally
{
TestFileStream.Close();
} // end Try
} // end then part of if
else
{
MessageBox.Show("File does not exist: Open with new Person List", "PO Manager Exists ");
plist = new PersonListClass();
} // end if
return(true); // The file read succeeded
} // end readFromFile
// This class manages the persistant object by reading from and writing to a file
// Write the Person List to file as a serialized binary object
public static bool writeToFile(ref PersonListClass plist, string fn)
{
Stream thisFileStream;
BinaryFormatter serializer = new BinaryFormatter();
if (plist.getPersonList().Count() > 0)
{
try
{
thisFileStream = File.Create(fn);
}
catch (Exception ex)
{
MessageBox.Show("File open error: Person List not written", "POManager File Open");
MessageBox.Show(ex.ToString());
return(false);
} // end Try
try
{
serializer.Serialize(thisFileStream, plist);
//MsgBox("File write: Person List was written")
}
catch (Exception ex)
{
MessageBox.Show("File write error: Person List not written", "POManager File Write");
MessageBox.Show(ex.ToString());
return(false);
}
finally
{
thisFileStream.Close();
} // end Try
}
else
{
MessageBox.Show("No Person in List");
}
// end if
return(true); // The file write succeeded
} // end WriteToFile