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Clint Singer
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Clint Singer
asked on 16 Jul 2012, 04:47 AM
Hi,
I have started looking into using the RadDataServiceDataSource and have followed the MVVM example which actually just uses the QueryableDataServiceCollectionView and I am trying to come up with a way to create calculated columns which contain the time delta between two adjacent rows using the DateTime from one of the columns. So basically if the DateTime between a row and its next row was 1 day, then the delta would show that.
I am wondering if anyone has some ideas how I could do this without creating a wrapper object because that seems to cause some issues with my ability to use the DataService query directly while still being able to rely on the DataPager as I would be changing the underlying objects and collections.
The original data doesn't have deltas pre calculated because filtering changes what rows are adjacent and I would want to calculate the deltas between those the same way as if the data was contiguous.
What would be ideal is that even though I am using paging it still brings back an extra "hidden" row to be used in the delta calculation as if it was contiguous with the following page.
Cheers,
Clint
I have started looking into using the RadDataServiceDataSource and have followed the MVVM example which actually just uses the QueryableDataServiceCollectionView and I am trying to come up with a way to create calculated columns which contain the time delta between two adjacent rows using the DateTime from one of the columns. So basically if the DateTime between a row and its next row was 1 day, then the delta would show that.
I am wondering if anyone has some ideas how I could do this without creating a wrapper object because that seems to cause some issues with my ability to use the DataService query directly while still being able to rely on the DataPager as I would be changing the underlying objects and collections.
The original data doesn't have deltas pre calculated because filtering changes what rows are adjacent and I would want to calculate the deltas between those the same way as if the data was contiguous.
What would be ideal is that even though I am using paging it still brings back an extra "hidden" row to be used in the delta calculation as if it was contiguous with the following page.
Cheers,
Clint
1 Answer, 1 is accepted
0
Hi,
We are afraid that we cannot think of a possible implementation of so custom scenario with so many custom requirements with our controls. You could calculate the deltas on the server -- but you can't do that because of filtering. When there is paging, you only get the current page of data on the client -- nothing else, so the first row of a page will not have "previous" row -- it is not on the client.
I am afraid that we don't know how these requirements can be implemented with Telerik controls. Maybe your best shot would be a completely custom solution built from scratch that would be specifically designed for your specific requirements.
Regards,
Ross
the Telerik team
We are afraid that we cannot think of a possible implementation of so custom scenario with so many custom requirements with our controls. You could calculate the deltas on the server -- but you can't do that because of filtering. When there is paging, you only get the current page of data on the client -- nothing else, so the first row of a page will not have "previous" row -- it is not on the client.
I am afraid that we don't know how these requirements can be implemented with Telerik controls. Maybe your best shot would be a completely custom solution built from scratch that would be specifically designed for your specific requirements.
Regards,
Ross
the Telerik team
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