WPF выпадающий IsDropDownOpen Свойство Binding режим OneWayToSource с WriteOnly Свойства

в простом приложении WPF MVVM я получил представление, как показано ниже:WPF выпадающий IsDropDownOpen Свойство Binding режим OneWayToSource с WriteOnly Свойства

<Grid DataContext="{StaticResource PageViewModel}"> 
    <StackPanel> 
     <ComboBox Width="100" Margin="10" 
       IsDropDownOpen="{Binding ComboOpen, Mode=OneWayToSource}" 
       IsEditable="True"> 
      <ComboBoxItem>1</ComboBoxItem> 
      <ComboBoxItem>2</ComboBoxItem> 
      <ComboBoxItem>3</ComboBoxItem> 
      <ComboBoxItem>4</ComboBoxItem> 
      <ComboBoxItem>5</ComboBoxItem> 
     </ComboBox> 
    </StackPanel> 
</Grid>

и вид Модель является как:

public bool ComboOpen 
{ 
    set 
    { 
     System.Diagnostics.Debug.Print(" Combobox is " + (value?" dropped down":" closed"));   
    } 
}

Я получаю правильно поведение в Windows 7, где создается приложение. Как только я запустил приложение, я вижу, что combobox доступен, и пользователь может удалить поле со списком и выбрать значение. Я также могу ввести Combobox, чтобы выбрать значение.

После этого я взял приложение и запустил его на Windows Xp SP3 и ударил. Я больше не мог отбрасывать выпадающие списки. Я смог ввести значение, которое, в свою очередь, выбирает правильный элемент.

Может кто-нибудь, пожалуйста, сообщите, почему combobox не бросается в Windows XP Sp3?

Спасибо заранее ...

[UPDATE: 13/10/2014] Просто, чтобы предоставить больше информации: я попытался воспроизвести проблему на домашнем компьютере, и к моему удивлению, на Windows 7, а также, Я не смог опустить раскрывающийся список. Я скопировал журнал отладки из моей рабочей машины, на которой он работает отлично и от домашней машины:

журнала отладки из домашней машины, где она нарушена:

'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_32\mscorlib\v4.0_4.0.0.0__b77a5c561934e089\mscorlib.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled. 
'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\assembly\GAC_MSIL\Microsoft.VisualStudio.HostingProcess.Utilities\10.0.0.0__b03f5f7f11d50a3a\Microsoft.VisualStudio.HostingProcess.Utilities.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled. 
'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Windows.Forms\v4.0_4.0.0.0__b77a5c561934e089\System.Windows.Forms.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled. 
'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Drawing\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Drawing.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled. 
'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System\v4.0_4.0.0.0__b77a5c561934e089\System.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled. 
'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\assembly\GAC_MSIL\Microsoft.VisualStudio.HostingProcess.Utilities.Sync\10.0.0.0__b03f5f7f11d50a3a\Microsoft.VisualStudio.HostingProcess.Utilities.Sync.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled. 
'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\assembly\GAC_MSIL\Microsoft.VisualStudio.Debugger.Runtime\10.0.0.0__b03f5f7f11d50a3a\Microsoft.VisualStudio.Debugger.Runtime.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled. 
'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\Users\XXXXXX\Desktop\X\DropdownIssue\bin\Debug\DropdownIssue.vshost.exe', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled. 
'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_32\System.Data\v4.0_4.0.0.0__b77a5c561934e089\System.Data.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled. 
'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Core\v4.0_4.0.0.0__b77a5c561934e089\System.Core.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled. 
'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Xml\v4.0_4.0.0.0__b77a5c561934e089\System.Xml.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled. 
'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\Microsoft.CSharp\v4.0_4.0.0.0__b03f5f7f11d50a3a\Microsoft.CSharp.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled. 
'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Xml.Linq\v4.0_4.0.0.0__b77a5c561934e089\System.Xml.Linq.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled. 
'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Data.DataSetExtensions\v4.0_4.0.0.0__b77a5c561934e089\System.Data.DataSetExtensions.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled. 
'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Xaml\v4.0_4.0.0.0__b77a5c561934e089\System.Xaml.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled. 
'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\WindowsBase\v4.0_4.0.0.0__31bf3856ad364e35\WindowsBase.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled. 
'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_32\PresentationCore\v4.0_4.0.0.0__31bf3856ad364e35\PresentationCore.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled. 
'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\PresentationFramework\v4.0_4.0.0.0__31bf3856ad364e35\PresentationFramework.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled. 
The thread 'vshost.NotifyLoad' (0x2150) has exited with code 0 (0x0). 
The thread '<No Name>' (0x2088) has exited with code 0 (0x0). 
The thread '<No Name>' (0x20f4) has exited with code 0 (0x0). 
The thread 'vshost.LoadReference' (0x1604) has exited with code 0 (0x0). 
'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\Users\XXXXXXXXXX\Desktop\X\DropdownIssue\bin\Debug\DropdownIssue.exe', Symbols loaded. 
'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Configuration\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Configuration.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled. 
Step into: Stepping over non-user code 'DropdownIssue.App.App' 
Step into: Stepping over non-user code 'DropdownIssue.App.InitializeComponent' 
Combobox is closed 
System.Windows.Data Error: 17 : Cannot get 'ComboOpen' value (type 'Boolean') from '' (type 'PageViewModel'). BindingExpression:Path=ComboOpen; DataItem='PageViewModel' (HashCode=52085517); target element is 'ComboBox' (Name=''); target property is 'IsDropDownOpen' (type 'Boolean') ArgumentException:'System.ArgumentException: Property Get method was not found. 
    at System.Reflection.RuntimePropertyInfo.GetValue(Object obj, BindingFlags invokeAttr, Binder binder, Object[] index, CultureInfo culture) 
    at System.Reflection.RuntimePropertyInfo.GetValue(Object obj, Object[] index) 
    at MS.Internal.Data.PropertyPathWorker.GetValue(Object item, Int32 level) 
    at MS.Internal.Data.PropertyPathWorker.RawValue(Int32 k)' 
'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\PresentationFramework.Aero\v4.0_4.0.0.0__31bf3856ad364e35\PresentationFramework.Aero.dll', Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.

журнала отладки из машины, на которой он работает правильно хорошо.

'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_32\mscorlib\v4.0_4.0.0.0__b77a5c561934e089\mscorlib.dll' 
'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\assembly\GAC_MSIL\Microsoft.VisualStudio.HostingProcess.Utilities\10.0.0.0__b03f5f7f11d50a3a\Microsoft.VisualStudio.HostingProcess.Utilities.dll' 
'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Windows.Forms\v4.0_4.0.0.0__b77a5c561934e089\System.Windows.Forms.dll' 
'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Drawing\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Drawing.dll' 
'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System\v4.0_4.0.0.0__b77a5c561934e089\System.dll' 
'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\assembly\GAC_MSIL\Microsoft.VisualStudio.HostingProcess.Utilities.Sync\10.0.0.0__b03f5f7f11d50a3a\Microsoft.VisualStudio.HostingProcess.Utilities.Sync.dll' 
'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\assembly\GAC_MSIL\Microsoft.VisualStudio.Debugger.Runtime\10.0.0.0__b03f5f7f11d50a3a\Microsoft.VisualStudio.Debugger.Runtime.dll' 
'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'D:\Temp\DropdownIssue\DropdownIssue\bin\Debug\DropdownIssue.vshost.exe' 
'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_32\System.Data\v4.0_4.0.0.0__b77a5c561934e089\System.Data.dll' 
'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Core\v4.0_4.0.0.0__b77a5c561934e089\System.Core.dll' 
'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Xml\v4.0_4.0.0.0__b77a5c561934e089\System.Xml.dll' 
'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\Microsoft.CSharp\v4.0_4.0.0.0__b03f5f7f11d50a3a\Microsoft.CSharp.dll' 
'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Xml.Linq\v4.0_4.0.0.0__b77a5c561934e089\System.Xml.Linq.dll' 
'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Data.DataSetExtensions\v4.0_4.0.0.0__b77a5c561934e089\System.Data.DataSetExtensions.dll' 
'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Xaml\v4.0_4.0.0.0__b77a5c561934e089\System.Xaml.dll' 
'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\WindowsBase\v4.0_4.0.0.0__31bf3856ad364e35\WindowsBase.dll' 
'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_32\PresentationCore\v4.0_4.0.0.0__31bf3856ad364e35\PresentationCore.dll' 
'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\PresentationFramework\v4.0_4.0.0.0__31bf3856ad364e35\PresentationFramework.dll' 
The thread 'vshost.NotifyLoad' (0x4680) has exited with code 0 (0x0). 
The thread 'vshost.LoadReference' (0x3b70) has exited with code 0 (0x0). 
'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'D:\Temp\DropdownIssue\DropdownIssue\bin\Debug\DropdownIssue.exe', Symbols loaded. 
'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\System.Configuration\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Configuration.dll' 
Step into: Stepping over method without symbols 'DropdownIssue.App.App' 
'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\PresentationFramework-SystemData\v4.0_4.0.0.0__b77a5c561934e089\PresentationFramework-SystemData.dll' 
Combobox is closed 
'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\PresentationFramework.Aero\v4.0_4.0.0.0__31bf3856ad364e35\PresentationFramework.Aero.dll' 
'DropdownIssue.vshost.exe' (Managed (v4.0.30319)): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_MSIL\UIAutomationTypes\v4.0_4.0.0.0__31bf3856ad364e35\UIAutomationTypes.dll' 
The thread '<No Name>' (0xf60) has exited with code 0 (0x0).

источник

2014-10-09 Rakshit Bakshi

Я предполагаю, что у вас есть другая версия .Net Framework, установленная на компьютере XP. Можете ли вы предоставить более подробную информацию об окружающей среде? –

Чтобы решить эту проблему, необходимо открыть билет с поддержкой MS. Они рекомендуются ниже:

Основано на конструкции OneWayToSource, геттер не требуется.
Анализатор xaml был переработан в .Net 4.0, и это было проблемой для него. .Net 4.5+ исправил проблему.

Я проверил в .NET 4.5, и проблема там решена.

источник

2015-06-29 00:20:58

WPF выпадающий IsDropDownOpen Свойство Binding режим OneWayToSource с WriteOnly Свойства

ответ

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