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set_currentPageIndex difficulties

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Grid

This is a migrated thread and some comments may be shown as answers.

2 Answers, 1 is accepted

answered on 24 Feb 2012, 04:19 PM

Scouring the forums I found the following post:

> It looks like it says "0 to 0 of Y". Once you change to a different page it corrects itself. Very odd.

Ah yes it's coming back to me. In order to fix the aforementioned "0 to 0 of y" I remember having to do:

    
            view.set_virtualItemCount(count); 
        
            view.CurrentPageIndex = -1; 
        
            view.set_currentPageIndex(pageIndex, true);

The problem with the "Page" command firing arose because in the code-behind Page_Load() I was telling the grid what the CurrentPageIndex was (which was grabbed from a cookie). That, combined with the internal call to set_currentPageIndex(0) that line 1 above does, caused ANOTHER client-side "Page" command to fire and fetch the data twice.

I ended up having to add "view.CurrentPageIndex = 0;" before calling set_virtualItemCount() in order for the internal call to set_currentPageIndex(0) to be ignored and not fire the "Page" command. The third line passes the undocumented second parameter "true" to set_currentPageIndex(), to avoid firing the command but to render the page numbers correctly. And it took me about a day to figure out those two hacks.

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Based on this information, I used the following code and the erroroneous 2nd page change doesn't fire:

var

tableView = grid.get_masterTableView();

tableView.set_dataSource(result.Items);

tableView.dataBind();

var currentPageIndex = tableView.get_currentPageIndex();

tableView.CurrentPageIndex = 0;

tableView.set_virtualItemCount(result.TotalItemCount);

tableView.set_currentPageIndex(currentPageIndex,

true);