blocks|key|1109179|text|我也遇到了同样的问题--你使用的是WPFToolkit的数据网格，还是.NET+4.0附带的数据网格。我们仍然在使用这里的工具包1。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1109180|另外，我注意到当通过远程桌面使用应用程序时，这个问题不会发生。|1109181|类似的问题在这里发布：|1109182|http://wpf.codeplex.com/workitem/14443|offset|length|1109183|提出了一个解决方案。我还没有机会去尝试一下。|1109184|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|0|0|12|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|U|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|V|8|@]|9|@$H|W|I|X|1|Y]]|A|$]]|$1|J|3|K|5|6|7|Z|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|10|8|@]|9|@]|A|$]]]|M|$N|$5|O|P|Q|A|$R|G]]]]

I'm getting the same problem - are you using the datagrid from the WPFToolkit, or the one that ships with .NET 4.0. We're still using the toolkit one here.

Also, I've notice that this problem does not occur when using the app through remote desktop.

Similar problem posted here:

<a href="http://wpf.codeplex.com/workitem/14443" rel="nofollow">http://wpf.codeplex.com/workitem/14443</a>

With a proposed solution. Haven't had a chance to try it.

blocks|key|1109234|text|我通过关闭网格控制上的自动化绕过了我这一端的问题。我发现这个问题是WPF+Toolkit控件所独有的，但是我在转换到4.0官方发行版DataGrid时遇到了问题(与这个问题无关)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1109235|因此，我改为从WPFToolkit派生类，并提供此覆盖：|1109236|protected+override+AutomationPeer+OnCreateAutomationPeer()
{
+++return+null;
}|code-block|syntax|javascript|1109237|也许有人能告诉我们这是不是一个好主意。|1109238|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|O|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

I've bypassed the problem on my end by turning off Automation on the grid control. I found that the problem was unique to the WPF Toolkit control, but I was having problems transitioning to the 4.0 official release DataGrid (unrelated to this question.)

So instead, I derive the class from the WPFToolkit and supply this override:

<pre><code>protected override AutomationPeer OnCreateAutomationPeer()
{
 return null;
}
</code></pre>

Maybe someone can tell us if this is a good idea or not.

blocks|key|894412|text|我在WPFToolkit+DataGrid的NET+3.5中也遇到了同样的问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|894413|我已经将我的WPFToolkit+DataGrid绑定到EntityFramework+ObservableCollection，具有双向关联的实体层次结构(父项<->项)。|894414|我通过在DataGrid上禁用隐式启用的AutoGenerateColumns并手动设置列解决了这个问题。|894415|希望这能有所帮助。|894416|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|L|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|M|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

I was getting the same problem in NET 3.5 with WPFToolkit DataGrid.

I have bound my WPFToolkit DataGrid to EntityFramework ObservableCollection, with hierarchy of entities that have two way associations (Parent&lt;->Items). 

I solved the issue by disabling implicitly enabled AutoGenerateColumns on the DataGrid, and manually setting the columns.

Hope this helps.

blocks|key|1109311|text|您好，我也有同样的问题，当我运行微软测试管理器与我们的WPF应用程序。我们使用的是WPFtoolkit版本v3.5.50211.1，用更低版本的v3.5.40619.1替换WPF工具包解决了这个问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1109312|现在我们可以同时运行MTM工具和WPF应用程序了。|1109313|在WPFtoolkit+v3.5.50211.1中，修复了一个与UI自动化相关的bug，我猜是因为在使用最新的WPFToolkit时出现了这个自动化对等问题。|1109314|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

Hi I also had same problem when I am running Microsoft Test Manager with our WPF application. We were using the WPFtoolkit version v3.5.50211.1, replacing WPF toolkit with lower version v3.5.40619.1 has solved this problem.

Now we are able to run the MTM tool and WPF application both simultaneously.

In WPFToolkit v3.5.50211.1 one bug is fixed related to UI Automation and I guess because of that this automation peer issue is coming while using the latest WPFtoolkit.

blocks|key|1109345|text|我能够通过将WPF+XAML文件中的DataGrid和ComboBox替换为以下两个派生类来修复此问题，这两个派生类都覆盖了OnCreateAutomationPeer()方法。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1109346|public+class+SafeDataGrid+:+DataGrid
{
++++protected+override+AutomationPeer+OnCreateAutomationPeer()
++++{
++++++++return+null;
++++}
}

public+class+SafeComboBox+:+ComboBox
{
++++protected+override+AutomationPeer+OnCreateAutomationPeer()
++++{
++++++++return+null;
++++}
}|code-block|syntax|javascript|1109347|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I was able to fix this issue by replacing both the DataGrid and the ComboBox in the WPF XAML file with the following two derived classes which both override the OnCreateAutomationPeer() method.

<pre><code>public class SafeDataGrid : DataGrid
{
 protected override AutomationPeer OnCreateAutomationPeer()
 {
 return null;
 }
}

public class SafeComboBox : ComboBox
{
 protected override AutomationPeer OnCreateAutomationPeer()
 {
 return null;
 }
}
</code></pre>

blocks|key|894569|text|我在一个旧的解决方案上突然出现了同样的问题(虽然它在我的本地开发计算机上工作得很好，但在测试系统上失败了(使用WPFToolkit+3.5.50211.1)+)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|894570|原来我的本地开发计算机有一个较旧的WPFToolkit:+3.5.40128.1|894571|然而，我做了更多的检查，意识到问题只出现在DataGrid是Microsoft.Windows.Controls.DataGrid+(即WPFToolkit+)，并且它包含来自System.Windows.Controls命名空间(在本例中是ComboBox)+-以及来自.Net+PresentationFramework.dll的控件时|894572|我们已经将解决方案从.Net+4.5.1+->更新到了.Net+4.7.1，这将意味着PresentationFramework.dll的新版本，但WPFToolkit+dll没有改变。|894573|我决定解决这个问题的最好方法是删除WPFToolkit.dll引用，并将Microsoft.Windows.Controls.DataGrid中的所有DataGrids更新为更新的System.Windows.Controls.Datagrid。|894574|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|M|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|N|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|O|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|P|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|K|$]]

I had this same problem crop up on an older solution (although it was working fine on my local dev computer, but failing on the test system (with WPFToolkit 3.5.50211.1)

Turned out my local dev computer had an older WPFToolkit: 3.5.40128.1

However I did a little more checking around and realised that the problem was only when the DataGrid was a Microsoft.Windows.Controls.DataGrid (ie a WPFToolkit one), and it contained a control from the System.Windows.Controls namespace (in this case a ComboBox) - and from the .Net PresentationFramework.dll )

We'd updated the solution to .Net 4.7.1 from .Net 4.5.1 -> which would have meant a new version of the PresentationFramework.dll, but the WPFToolkit dll had not changed.

Decided that the best way to fix this was to just remove the WPFToolkit.dll reference, and update all the DataGrids from Microsoft.Windows.Controls.DataGrid to the newer System.Windows.Controls.Datagrid.

I am receiving an error message "Recursive call to Automation Peer API is not valid" when loading a datagrid with a datatemplatecolumn containing a combobox column. The error ends up caught in our unhandled exception code. This seems to be an issue on my machine, and google has provided no source of guidance on resolving the issue. The issue appears to only occur when I am populating the comboboxes with data. Populating the comboboxes (if I do not load data) works correctly, and while the error is displayed I am able to see the data properly retrieved in the background. 

I am using a WPF datagrid where I'm using a DataGridTemplateColumn for adding a combobox inside the grid. I have the drop down list bound to an enum using an objectdataprovider. In the code behind when initializing my screen I use a Linq2Sql statement to retrieve data and populate the Itemssource of the grid.

<pre><code>&lt;grid:DataGrid.Resources&gt;
 &lt;ObjectDataProvider
 x:Key="ChangeTypeData"
 MethodName="GetValues"
 ObjectType="{x:Type System:Enum}"&gt;
 &lt;ObjectDataProvider.MethodParameters&gt;
 &lt;x:Type TypeName="namespace:ChangeType" /&gt;
 &lt;/ObjectDataProvider.MethodParameters&gt;
 &lt;/ObjectDataProvider&gt; 
 &lt;/grid:DataGrid.Resources&gt;

 &lt;grid:DataGrid.Columns&gt;
 &lt;grid:DataGridTextColumn Binding="{Binding DatapointName}" Header="Datapoint Changed" IsReadOnly="True" Width="Auto" /&gt;
 &lt;grid:DataGridTemplateColumn Header="Change Type"&gt;
 &lt;grid:DataGridTemplateColumn.CellTemplate&gt;
 &lt;DataTemplate&gt;
 &lt;ComboBox
 Text="{Binding Path=ChangeTypeName}"
 ItemsSource="{Binding Source={StaticResource ChangeTypeData}}"
 Name="dgcboChangeType"
SelectionChanged="dgcboChangeType_SelectionChanged"/&gt;
 &lt;/DataTemplate&gt;
 &lt;/grid:DataGridTemplateColumn.CellTemplate&gt;
</code></pre>




Any and all guidance on solving this issue is appreciated.

WPF Recursive call to Automation Peer API is not valid

数据网格

Windows

当使用包含组合框列的datatemplatecolumn加载数据网格时，我收到一条错误消息"Recursive call to Automation Peer API is not valid“。错误最终在我们未处理的异常代码中被捕获。这似乎是我的机器上的一个问题，谷歌没有提供解决这个问题的指导来源。这个问题似乎只有在...

问对自动化对等API的WPF递归调用无效
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