Just about your whole code needs to be rewritten. I think you're making this harder on yourself than you needed to. The reason nothing is happening is because tbControl is a new tabcontrol with no tabpages. Instead of instantiating a new tabcontrol, you need to loop through the tabpages of the original tabcontrol that you were working with at the beginning. To save yourself some trouble, let the designer work for you. Simply drag and drop a tabcontrol on the page. Now, it can be accessed globally. Also, ditch that global datagridview named dgOutput. You don't need it and it shouldn't be being used. It shouldn't be being used because you create a new datagridview for each tab page that's created dynamically. Once you get all that rewired, take a look at your code. Think about exactly what's going to happen. Right now, if that foreach loop would execute, you would only be getting data from this.dgOutput but your looping through the rows of dgv which is the datagridview on each tabpage. You want to loop through the rows of dgv to get values. You want to loop through the columns of dgv to load the headers. Then, after the headers and values are in the worksheet, you want to add it to the workbook. Set some breakpoints within your loops and the rest of your code to debug. It'll save you alot of time and you'll learn a whole lot quicker than somebody helping you.
Lester http://www.lestersconyers.com
