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DMacy
#1 Posted : Friday, June 16, 2017 3:13:50 PM
Rank: Advanced Member

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Joined: 9/1/2010
Posts: 136
After a page of results is displayed on my web page, I want to re-sort the results in a different order when a button on the page is clicked. I know how to implement a comparer for the new sort order. I just don't know how to get the results to be sorted again and then displayed on page postback.

Thanks!

Dan
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Dan
#2 Posted : Friday, June 16, 2017 5:00:31 PM
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Joined: 10/20/2004
Posts: 456
Hi Dan,

Thanks for your post.

Please take a look at this page from the Help documentation;
https://keyoti.com/produ.../CustomDataFilters.html

That should cover everything but of course please let us know if not.

Dan
Dan Wright
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DMacy
#3 Posted : Friday, June 16, 2017 7:48:02 PM
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Joined: 9/1/2010
Posts: 136
My custom data consists of a set of field names and values concatenated with separator characters. I have an author name compare class, implementing IComparer(Of Keyoti.SearchEngine.Search.ResultItem), and in its Compare function I retrieve one of these fields from the custom data and use the values to do the compare. This is all in the VB.NET code-behind for my search results page.

After the results are displayed, I want to be able to click a button and have Keyoti use the author name comparer to re-sort the results. It has to be done on postback in the code-behind, not in JavaScript. Also, I don't know anything about JSON, so I can't rely on that for the solution.

Is it possible to do what I described? The page you referenced is a different approach that I don't think is applicable to my situation. If I'm missing something, please let me know.

Thanks!

Dan
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Dan
#4 Posted : Friday, June 16, 2017 9:28:43 PM
Rank: Advanced Member

Groups: Administrators, Registered

Joined: 10/20/2004
Posts: 456
Hi Dan,

Sorry, I sent the wrong link before.

This is about sorting when using JS;
https://keyoti.com/produ.../CustomDataSorting.html

and this page is for when using our Control based usage (scroll down the page);
https://keyoti.com/produ...ith%20Custom%20Data.htm

Sorry about that. Let us know if you have any trouble.

Dan

Dan Wright
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DMacy
#5 Posted : Friday, June 16, 2017 9:40:13 PM
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Joined: 9/1/2010
Posts: 136
I've studied that page and I think I understand what it's doing. But I don't understand how to trigger the ResultItemsFinalized action again to supply a different comparer. Is it like a whole new search, even though all that's changing is the sort order?
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Jim
#6 Posted : Friday, June 16, 2017 9:57:20 PM
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Joined: 8/13/2004
Posts: 2,669
Location: Canada
The re-sort is triggered by InvalidateChildControlHierarchy in the button handlers

Protected Sub sortDownBT_Click(ByVal sender As Object, ByVal e As System.EventArgs)

sortByDate = True

sortDirection = sortDirection.Descending

Sr1.InvalidateChildControlHierarchy()

End Sub

Protected Sub sortUpBT_Click(ByVal sender As Object, ByVal e As EventArgs)

sortByDate = True

sortDirection = sortDirection.Ascending

Sr1.InvalidateChildControlHierarchy()

End Sub

and that causes ResultItemsFinalized to trigger again.

It has to do the search again because it doesn't store all of the results anywhere between postbacks.

Jim
-your feedback is helpful to other users, thank you!
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DMacy
#7 Posted : Friday, June 16, 2017 10:59:47 PM
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Joined: 9/1/2010
Posts: 136
Thanks, Jim! That seems to be what I needed. I have some other, unrelated flow issues in my code to work out, but I'm quite sure that your suggestion about InvalidateChildControlHierarchy (which I had never seen or used before) solved my re-sorting issue.

Dan
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