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DataGrid 12月份补丁发布

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DataGrid 自从10月份和Silverlight 2一起发布以来,我们陆续从各个渠道获得了一些用户反馈以及我们内部新发现的一些Bug.因为DataGrid相对比较独立,比较容易更新,而不需要影响决大多数最终用户,所以我们的管理团队决定单独发布一个补丁版本来解决这些已发现的问题.这就促成了我们12月版本的发布.

这个版本的发布其实令我个人感觉很高兴,因为这让人看到了Microsoft在对用户的反馈方面速度的提高,不再是一味的等待大的发布,而是通过各种更加灵活的手段迅速解决已发现的用户面临的各种问题.我真的希望这个模式会让我们的产品更加具有竞争力.

下面是这个Release所修正的Bug:

Silverlight 2 DataGrid December 2008 Release

We have just uploaded a new version of the DataGrid that includes a number of bug fixes and a few behavioral breaking changes from the version that shipped with Silverlight 2. Please take the time to read through and understand all of the changes before you decide to upgrade your DataGrid. Following this list of changes is a set of instructions on how to start using the new version.

 

Breaking Changes

An application that uses the DataGrid will still compile but will no longer work as expected if it was dependent on any of the following behaviors.

1. FrozenColumnCount now takes hidden columns into account. Previously, only the first columns with Visibility set to Visible were included in the range of frozen columns. A column with Visibility set to Collapsed can now be considered frozen even though it isn’t visible. This is to ensure that a column’s DisplayIndex corresponds with the DataGrid’s FrozenColumnCount (i.e. if FrozenColumnCount == 3, columns with DisplayIndex < 3 are considered frozen).

2. The DataGrid’s current cell is now kept in sync with an ICollectionView’s notion of currency. Moving the current position or changing the current item of an ICollectionView will now move the current cell and selected item of a DataGrid, and vice versa. For this to work, the DataGrid’s ItemsSource must be set to a collection that fully implements ICollectionView.

3. A developer can now programmatically reorder a non-frozen column to the frozen column range (and vice versa) by changing a column’s DisplayIndex. The DataGrid used to throw an exception in these cases. An end-user, however, is still unable to do this through the UI by dragging column headers.

Bugs Fixed

The following is a list of bugs fixed in the DataGrid since the version released with Silverlight 2. If any application had a workaround for these bugs, the workaround is no longer necessary and should be removed. Its inclusion may cause undesired behavior.

1. Horizontal Gridlines do not show in FillerColumn

2. DragIndicator does not show during reorder when DataGrid is placed inside StackPanel

3. DragIndicatorStyle only exists on the DataGrid level, should also exist at the column level

4. DataGrid doesn't support a disabled state in the main template
By default, the DataGrid is now grayed out when IsEnabled == false, and includes a new visual state.

5. EndEdit is called twice
Any application accounting for IEditableObject.EndEdit accidentally being called twice by the DataGrid will need to be updated. 6. Able to leave edited DataGrid without ever triggering EndEdit

7. Changing ItemsSource while in Editing Mode causes Exception to be thrown

8. Row containing focus disappears after sort or ItemsSource change
Any application working around the “disappearing row” issue by manipulating focus within the DataGrid will no longer need to do so, and should be updated.

9. ColumnHeader button pressed visualization should match the new Button pressed visualization

10. SL Designer hits a NullReferenceException while adding an empty HeaderStyle

11. Cells out of view do not always show up when a resize of the DataGrid forces them in view

12. AutoSizedRows keep growing even when the rows are recycled

13. Scrollbar incorrect when ItemsSource changed and DataGrid is on a background Tab

14. Incorrect VerticalScrollbar when setting ItemsSource on DataGrid inside a Popup

15. HorizontalContentAlignment does not have any effect on the DataGridColumnHeader

16. Resizing columns to smaller than column header content removes separator

17. SelectedItem is not updated at the time when the CurrentCellChanged event is raised

      Any application accounting for the fact that Selection was out of sync at the time the CurrentCellChanged event was raised will need to be updated. Now the DataGrid will not raise either of the SelectionChanged or CurrentCellChanged events until both selection and currency have been updated.

18. Sorting or Resetting a CollectionView causes incorrect RemovedItems in SelectionChanged event

19. ScrollColumnIntoView does not align correctly if there are frozen columns

20. Reordering a column should only show DragIndicator for valid reorder positions

      The DataGrid will now clip the ColumnHeader’s DragIndicator so that it doesn’t show up when dragging a frozen column over a non-frozen column, and vice versa.

21. Adding or removing columns within the frozen column range should not throw exception

22. FrozenColumnCount and the Column’s IsFrozen is getting out of sync when it isn’t visible

23. Exception thrown when sorting a DataGrid that has a list of nullable ints as its ItemsSource

24. CellStyle Background property doesn’t work

      Previously, setting the Background property inside of CellStyle had no effect. Applications with unique CellStyles should ensure that the desired background color is applied.

25. CellStyle is not applied to Filler Column

26. Setting a DataGrid style that overwrites the template after the original template has been loaded causes an Argument exception

27. Cannot hold editing mode when using a DatePicker or ComboBox in editing template

      There was a bug that prevented any editing control that uses a Popup to work correctly in the DataGrid. As soon as the Popup opened, the DataGrid would lose focus and automatically CommitEdit. It now tracks focus within a child Popup in order to support DatePicker, ComboBox and any other editing control that opens a Popup.

28. Double-click required on external Buttons when in editing mode

      A single click on Buttons (or any other control that handles MouseLeftButtonDown) outside of the DataGrid will now register correctly. Previously, if the user was in editing mode, the first click would CommitEdit and the second click would register on the Button.

29. Sorting or resetting the ItemsSource does not raise UnloadingRow events

 

Installation Instructions

Visit the Silverlight 2 DataGrid December 2008 Release download page and read the installation instructions carefully. In order to successfully use the new DataGrid you must do the following.

1. Close all instances of Microsoft Visual Studio.2. Delete all cached toolbox items by removing all files beginning with "toolbox" from %LocalAppData%\Microsoft\VisualStudio\9.0.

  • On Microsoft Windows XP, %LocalAppData% is Documents and Settings\UserName\Local Settings\Application Data.
  • On Microsoft Windows Vista, %LocalAppData% is Users\UserName\AppData\Local.

3.    Replace the following assemblies with the ones in this package:

  • %ProgramFiles%\Microsoft SDKs\Silverlight\v2.0\Libraries\Client\System.Windows.Controls.Data.dll
  • %ProgramFiles%\Microsoft SDKs\Silverlight\v2.0\Libraries\Client\System.Windows.Controls.Data.Design.dll

4. For any existing projects, delete the reference to System.Windows.Controls.Data.dll and then re-add the reference.

 

 

Happy Holidays from the Silverlight DataGrid Team!

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