Sure. A simple console app to demonstrate.


using System;
using System.Collections.Generic;
using System.Text;

namespace ConsoleApplication1
{
class Program

Sure it's possible.
Where does the range come from? That is, the start and end dates of the current month and current year, or user input, or ...?

How do you want it?
Two date objects, a string, an array of dates ...?

Okay, no, that won't work like that.
Behind the scenes, all post back url does is change the onclick on the button CLIENT SIDE.
So changing it then trying to call onclick, before the code is...

Ah, I see.
Hang on a few, let me trace it.

Here's what I had.
Note that posting to the daniweb address actually causes an error due to them not accepting POST from outside their domain. However, this still indicates success at postbackurl....

Yes, and for me, it does.
You're inheriting code. Did you mean to do that?

Inherits="PassParameters._Default" %>

You had a couple other errors in there I fixed without thinking about it, too. ...

You might be accidentally calling the click before the url is actually set.

The DateTime object has properties for month, day, year, etc. DateTime.Now is today's date. You can go from there.
Note that ToString is overloaded for DateTime in order to format a date for output.