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具体更新内容如下：

已解决的问题

该列表包含了v17.2.8中解决的所有问题：

Data Grid

•  - A validation message is shown many times if DataGrid works in virtual mode
•  - Can't resize a fixed column if resizing is not enabled for the next fixed column
•  - DataGrid - Calling editRow after filtering throws the "Cannot read property 'data' of undefined" error
•  - DataGrid - Header cells are sometimes misaligned with grid content if horizontal scrolling is enabled on 200 dpi screens
•  - DataGrid - It is necessary to keep the column size with the disabled allowResizing field
•  - DataGrid - The columnOption method sets an option for a wrong column when using multi-row columns
•  - DataGrid - The format option is not taken into account on exporting to Excel if it's specified as a function
•  - DataGrid - The getCellElement method returns an incorrect cell element in "form" editing mode if the visible column option is disabled
•  - DataGrid - The Lookup column option setting operates incorrectly if the grid contains banded columns
•  - DataGrid - The title element is generated for HTML in the masterDetail template
•  - DataGrid changes the pageSize option if the option value is zero when the state storing is enabled
•  - DataGrid displays an incorrect number of records if the widget is grouped by three or more columns and groupPaging is enabled
•  - DataGrid displays data incorrectly when records are grouped by a field that has the 'null' value in several records
•  - Documentation - Add a note that relative column width is not appropriate for fixed columns in DataGrid
•  - dxDataGrid - The "Select all" checkbox has a wrong value in deferred selection mode
•  - dxDataGrid freezes on scrolling when a column with the specified datatype has a null value
•  - Excel crashes when using Excel's 'Text to Columns' functionality in the exported file
•  - Menu placed in the DataGrid cell template displays the Down arrow after upgrade to 17.2.7
•  - The "Cannot create property 'summary' on string 'success'" error occurs when the infinite scrolling is used and the grid gets its data source from an AJAX request
•  - The Grid adds unnecessary group footer rows for summaries when infinite scrolling is used

Data Visualization

•  - Chart - A stacked spline area shows an extra series
•  - dxChart - Points are not connected in the Range Area series
•  - PieChart - Elements' order differs form the underlying datasource items' order
•  - PieChart - Label connectors cross other labels if resolveLabelOverlapping is "shift" in certain scenarios
•  - PieChart - Label text is cut off
•  - The Chart does not calculate its initial value axis range correctly

DevExtreme Core

•  - A typescript definition is wrong for the base64_encode method after upgrading to version 17.2.7
•  - Documentation - Add a note that localization keys should not be used from JS
•  - NumberBox - Standard formats incorrectly work when Globalize is included
•  - NumberBox with the format option specified works incorrectly if the Poland locale is applied using Intl
•  - Template methods don't replace previously set values
•  - The Promise.catch callback function is not called when the ODataStore.insert method fails
•  - The 'valueChanges' event unexpectedly fires when a reactive form is used with the DxTextBox component

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