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經過很長時間的winform之後，我再次做了一些WPF，並且遇到了使用轉換器的問題。在'System.Windows.StaticResourceExtension'上提供值
我有一個用戶控件，它裏面我有一個網格DevExpress的：
<UserControl x:Class="X.Y.Z.Views.LogMessagesView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:local="clr-namespace:X.Y.Z.Views"
xmlns:mvvm="http://prismlibrary.com/"
xmlns:dxg="http://schemas.devexpress.com/winfx/2008/xaml/grid"
xmlns:dxb="http://schemas.devexpress.com/winfx/2008/xaml/bars"
xmlns:dxe="http://schemas.devexpress.com/winfx/2008/xaml/editors"
xmlns:devExpress="clr-namespace:X.Wpf.Converters.DevExpress;assembly=X.Wpf"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="300" mvvm:ViewModelLocator.AutoWireViewModel="True">
<UserControl.Resources>
<devExpress:CollectionToCriteriaOperatorConverter x:Key="CollectionToCriteriaOperatorConverter"/>
</UserControl.Resources>
<dxg:GridControl SelectionMode="Row" ItemsSource="{Binding EventsList}" FilterCriteria="{Binding VisibleLevels, Converter={StaticResource CollectionToCriteriaOperatorConverter}, ConverterParameter='Level'}">
<dxg:GridControl.SortInfo>
<dxg:GridSortInfo FieldName="TimeStamp" SortOrder="Descending" />
</dxg:GridControl.SortInfo>
<dxg:GridControl.Columns>
<dxg:GridColumn FieldName="TimeStamp" Header="Local Computer Time">
<dxg:GridColumn.EditSettings>
<dxe:TextEditSettings DisplayFormat="G"/>
</dxg:GridColumn.EditSettings>
</dxg:GridColumn>
<dxg:GridColumn FieldName="Level" Header="Level" >
<dxg:GridColumn.DisplayTemplate>
<ControlTemplate>
<StackPanel Orientation="Horizontal" DataContext="{Binding EditValue, RelativeSource={RelativeSource TemplatedParent}}">
<!-- Convert severity to image -->
<TextBlock Text="{Binding Name}" />
</StackPanel>
</ControlTemplate>
</dxg:GridColumn.DisplayTemplate>
</dxg:GridColumn>
<dxg:GridColumn FieldName="RenderedMessage" Header="Message"/>
</dxg:GridControl.Columns>
<dxg:GridControl.View>
<dxg:TableView ShowFixedTotalSummary="True" AutoWidth="True" Name="view" AllowSorting="False" ShowIndicator="False" ShowGroupPanel="False" ShowAutoFilterRow="False" AllowColumnFiltering="False" AllowEditing="False" AllowFilterEditor="False" AllowGrouping="False" AllowMasterDetail="False">
<dxg:TableView.ColumnMenuCustomizations>
<dxb:RemoveBarItemAndLinkAction ItemName="BestFitColumns" />
</dxg:TableView.ColumnMenuCustomizations>
</dxg:TableView>
</dxg:GridControl.View>
</dxg:GridControl>
</UserControl>
我宣佈我Converter的資源，我用它在我的約束力。一切編譯，但是我得到了運行時異常：
System.Windows.Markup.XamlParseException occurred
HResult=-2146233087
LineNumber=38
LinePosition=130
Message='Provide value on 'System.Windows.StaticResourceExtension' threw an exception.' Line number '17' and line position '78'.
Source=PresentationFramework
StackTrace:
at System.Windows.Markup.WpfXamlLoader.Load(XamlReader xamlReader, IXamlObjectWriterFactory writerFactory, Boolean skipJournaledProperties, Object rootObject, XamlObjectWriterSettings settings, Uri baseUri)
at System.Windows.Markup.WpfXamlLoader.LoadBaml(XamlReader xamlReader, Boolean skipJournaledProperties, Object rootObject, XamlAccessLevel accessLevel, Uri baseUri)
at System.Windows.Markup.XamlReader.LoadBaml(Stream stream, ParserContext parserContext, Object parent, Boolean closeStream)
at System.Windows.Application.LoadComponent(Object component, Uri resourceLocator)
at X.Y.Z.Views.LogMessagesView.InitializeComponent() in E:\Dev\WS1\Branches\ReworkedServer\Solution\AAAAAA\Views\LogMessagesView.xaml:line 1
InnerException:
HResult=-2147467263
Message=The method or operation is not implemented.
Source=PresentationFramework
StackTrace:
at System.Windows.Baml2006.Baml2006SchemaContext.ResolveBamlType(BamlType bamlType, Int16 typeId)
at System.Windows.Baml2006.Baml2006SchemaContext.GetXamlType(Int16 typeId)
at System.Windows.Baml2006.Baml2006Reader.Process_ElementStart()
at System.Windows.Baml2006.Baml2006Reader.ReadObject(KeyRecord record)
at System.Windows.ResourceDictionary.CreateObject(KeyRecord key)
at System.Windows.ResourceDictionary.OnGettingValue(Object key, Object& value, Boolean& canCache)
at System.Windows.ResourceDictionary.OnGettingValuePrivate(Object key, Object& value, Boolean& canCache)
at System.Windows.ResourceDictionary.GetValueWithoutLock(Object key, Boolean& canCache)
at System.Windows.ResourceDictionary.GetValue(Object key, Boolean& canCache)
at System.Windows.StaticResourceExtension.FindResourceInEnviroment(IServiceProvider serviceProvider, Boolean allowDeferredReference, Boolean mustReturnDeferredResourceReference)
at System.Windows.StaticResourceExtension.TryProvideValueInternal(IServiceProvider serviceProvider, Boolean allowDeferredReference, Boolean mustReturnDeferredResourceReference)
at System.Windows.StaticResourceExtension.ProvideValueInternal(IServiceProvider serviceProvider, Boolean allowDeferredReference)
at System.Windows.StaticResourceExtension.ProvideValue(IServiceProvider serviceProvider)
at MS.Internal.Xaml.Runtime.ClrObjectRuntime.CallProvideValue(MarkupExtension me, IServiceProvider serviceProvider)
InnerException:
轉換器，如果它的事項：
public class CollectionToCriteriaOperatorConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
String columnName = parameter as String;
if (string.IsNullOrEmpty(columnName))
{
throw new ArgumentNullException(nameof(columnName), "You have to provide a valid column name");
}
IEnumerable collection = value as IEnumerable;
if (collection == null)
{
return null;
}
return new InOperator(new OperandProperty(columnName), collection.OfType<object>().Select(x => new OperandValue(x)));
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
throw new NotImplementedException();
}
}
我發現了一些其他情況下，但他們說，轉換器應在其使用前進行初始化（這似乎是這樣的，對吧？）
我也使用棱鏡，我不知道它是否會帶來一些其他問題（此用戶控件放入視圖）。
我錯過了什麼？
你能編輯完整的異常嗎？它可能會提供線索。 – Haukinger
請參閱[「應該在其標題中包含」標籤「？」]（http://meta.stackexchange.com/questions/19190/should-questions-include-tags-in-their-titles），其中共識是「不，他們不應該」！ –
@ J4N你的轉換器是好的，應該工作和過濾罰款從我看到的，一個原因可能是它未能找到資源，嘗試在同一個項目中聲明轉換器只是爲了排除這一點，而不是從類庫。 –