Will you Please explain very briefly what do you try to do?

You have a GridView. In each row there are many DropDownLists and a CheckBox.  And You have a Table out side GridView

Looping thrugh the gridview rows, in each row you loop through all the rows of the table and doing some calculation using value of that row and next row and the selected values of the some of the DropDownLists and assigning values to some variables....

Please complete this......

Also please tell me What is

rowgridview++;