Paging Control for Gridview enables the paging control to your gridview
display. Large number of data when displayed on a single screen
could be clumpsy. With the paging enabled on the grid view, total data
could be divided into number of pages and displayed as separate pages.
Using the code
The simple logic of paging is as follows:
we maintain a global datatable, current index and a temporary
datatable. First the total data to be displayed is loaded in the
main Datatable. This will be done only once for a particular set of
data. After the main datatable is loaded, then according to the
provided no. of documents for each page, total page no. is determined
and the each page is shown with the corresponding data from the main
public int currentIndex = 1;
public DataTable mainDTable;
public DataTable tempDTable;
public int numDocs;
public int totPages = 1;
For this a temporary data table is maintained. What it does is, it
fetches the selected rows from the main datatable according to the
current index and the total no. of documents to be shown in each
page. The grid view is cleared each time a page changes and is
reloaded each time from the temp. data table which keeps on changing
with the current index.
The range for the data to be populated in the temp datatable is
calculated as shown above as from_value and to_value. so at each
instance the temp datatable consist of data from the values of
fromvalue to the tovalue.
int fromValue = numDocs * (currentIndex - 1) + 1;
int toValue = currentIndex * numDocs;
Points of Interest
The important thing to remember here is the tracking of the current index. If you get it slipped then whole the logic may be useless.