如果你打開Blend,將一個按鈕放在一個網格上並在其上設置幾個ChangeProeprtyActions ...將失敗,並顯示一條錯誤消息。Silverlight的ChangePropertyAction按鈕控件不能正常工作
<UserControl
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity" xmlns:ei="http://schemas.microsoft.com/expression/2010/interactions"
x:Class="SL4_Button_States.MainPage"
Width="640" Height="480">
<Grid x:Name="LayoutRoot" Background="White">
<Button x:Name="button" Content="Button" Height="39" Margin="68,42,299,0" VerticalAlignment="Top">
<i:Interaction.Triggers>
<i:EventTrigger>
<ei:ChangePropertyAction PropertyName="Content" Value="Button is now loaded!" TargetObject="{Binding ElementName=button}"/>
</i:EventTrigger>
<i:EventTrigger EventName="Click">
<ei:ChangePropertyAction PropertyName="Content" Value="temporary"/>
</i:EventTrigger>
</i:Interaction.Triggers>
</Button>
</Grid>
的錯誤信息是這樣的:
Webpage error details
Message: Unhandled Error in Silverlight Application The type 'Object' was not found. [Line: 2 Position: 10] at MS.Internal.XcpImports.CreateFromXaml(String xamlString, Boolean createNamescope, Boolean requireDefaultNamespace, Boolean allowEventHandlers, Boolean expandTemplatesDuringParse)
at MS.Internal.XcpImports.CreateFromXaml(String xamlString, Boolean createNamescope, Boolean requireDefaultNamespace, Boolean allowEventHandlers)
at Microsoft.Expression.Interactivity.TypeConverterHelper.ExtendedStringConverter.ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, Object value)
at Microsoft.Expression.Interactivity.Core.ChangePropertyAction.Invoke(Object parameter)
at System.Windows.Interactivity.TriggerBase.InvokeActions(Object parameter)
at System.Windows.Interactivity.EventTriggerBase.OnEvent(EventArgs eventArgs)
at System.Windows.Interactivity.EventTriggerBase.OnEventImpl(Object sender, EventArgs eventArgs)
at MS.Internal.CoreInvokeHandler.InvokeEventHandler(UInt32 typeIndex, Delegate handlerDelegate, Object sender, Object args)
at MS.Internal.JoltHelper.FireEvent(IntPtr unmanagedObj, IntPtr unmanagedObjArgs, Int32 argsTypeIndex, Int32 actualArgsTypeIndex, String eventName, UInt32 flags)
Line: 1
Char: 1
Code: 0
URI: http://localhost:62193/Silverlight.js
如果你在一個TextBlock添加ChangePropertyAction ...正常工作:
<TextBlock Height="20" Margin="207,132,138,0" TextWrapping="Wrap" Text="TextBlock" VerticalAlignment="Top">
<i:Interaction.Triggers>
<i:EventTrigger EventName="MouseLeftButtonDown">
<ei:ChangePropertyAction PropertyName="Text" Value="Mouse Left BUtton Down"/>
</i:EventTrigger>
</i:Interaction.Triggers>
</TextBlock>
如果您有任何想法爲什麼發生這種情況請賜教我......如果有另一種/更好的方式來做到這一點,除了國家請讓我知道。
謝謝。
謝謝科比!我暗示了許多事情......這就是爲什麼我期待它知道,如何處理它,在它讓我選擇它的情況下......:) – asuciu 2012-03-13 01:01:25