This section is your gateway to important task-based information that will help you to effectively use the various features and functionalities provided by xamDataGrid control.
This serves as a starting point with links to specific topics about the grouping functionality using the xamDataGrid control.
Introduction
Introduction to the xamDataGrid external sorting, filtering, grouping and summaries
XamDataGrid feature for external sorting, filtering, grouping and summaries allows you to offload those operations to an external source. By default, sorting, filtering, grouping and summary calculations are performed internally by the data presenter. Although the internal processing allows data presenter to integrate tightly those operations with its’ own object model and UI, there are advantages for performing those operations externally.
Cases
Description
Avoiding performance impact in terms of memory allocation
The internal process of sorting, filtering, grouping and summary calculations requires the data presenter to allocate DataRecord objects for all of the data items that are part of the operation.
This can have an adverse performance impact in terms of memory allocation as well as initial CPU time taken by the process of allocation of the data record objects.
One advantage of performing the operations externally is better performance.
Using native XamDataGrid UI with external data source
With external process the data source inherits ICollectionView, any sorting, filtering and grouping operations performed on the view can be reflected in the UI of the data presenter.
Any changes made to sort, filter or grouping criteria through the data presenter UI will be reflected in the underlying ICollectionView as well.
Bound ICollectionView instance to other View control
You can bind the same ICollectionView instance to other view controls. This will reflect the sorting, filtering and grouping criteria applied via data presenter UI.
When the SortDescription and GroupDescriptions of ICollectionView are modified externally, the data presenter will be notified of the changes and synchronize its SortedFields collection to reflect the changes.
Note
Note
Only the root field’s layout support external processing and not child field layouts, as there are multiple collection views for a child field layout.
Performing operations remotely
It is possible to perform sorting, filtering, grouping and summary calculations on a server. The function of the data presenter will be to show the results only, and its UI will be used for generating the commands for sorting, filtering, grouping and summaries on the server.
Main Features Summary
Main features summary chart
The following table summarizes the main features of the xamDataGrid external sorting, filtering, grouping and summaries.
SortEvaluationMode property on FieldLayoutSettings. This enumeration has the following options:
Default
Auto
Manual
UseCollectinView
To use external sorting, you should set the UseCollectionView option. You can find further information about external sorting in the following topic: External Sorting
FilterEvaluationMode property on FieldLayoutSettings. This enumeration has the following options:
Default
Auto
Manual
UseCollectinView
To use external filtering, you should set the UseCollectionView option. You can find further information about external filtering the following topic: External Filtering
GroupByEvaluationMode property on FieldLayoutSettings. This enumeration has the following options:
Default
Auto
UseCollectinView
To use external grouping, you should set the UseCollectionView option. You can find further information about external grouping in the following topic: External Grouping
