Multiple upload controls

Uploadify might be your best choice, which use jquery + flash.

Some points to note on this control. If you use it in pages need authentication. Remember to remove security access for your upload.aspx, else you will encounter http 302 !!!!

Telerik Client AJAX callback

Calling from client back to server through AJAX

serializing + deserializing your object

Excellent article on this. How to serialize your object to xml and get it back.

Linq nullable

How to use linq projection with custom object for nullable parameter

nullable in linq

Excellent article on how to deal with nullable value

telerik excel export style

Good demo to show you how you can change the look and feel

How to change sheet name.

In ExcelMLExportRowCreated  event,

e.Worksheet.Name = "Some Worksheet Name";

access denied to MQ

Summary is to change the owner to you and give yourself full access on it.

Full details here