其他多绑定转换器中的转换器-输入值为UnSetValue. [英] Converter in other multibinding converter - input value is UnSetValue.

问题描述

请参见下面的xaml代码:
< ComboBox.Style >
MultiBinding 转换器 = " { StaticResource twoBooleanAndConverter } " >
绑定 路径 = " Entity.IsPreDefined " 模式 = " OneWay " 转换器 = " {StaticResourcevertedBooleanConverter} " />
绑定 路径 = " Entity.Iwego " 模式 = " OneWay " />
</ MultiBinding >
</ ComboBox.Style >

问题出在 twoBooleanAndConverter ，第一个输入值始终是UnSetValue.如果我不使用反相器BooleanConverter，则t woBooleanAndConverter 中的输入值是正确的.
如果我绑定到ComboBox.IsEnabled属性，则开头带有示例代码是很奇怪的. (将 ComboBox.Style 更改为 ComboBox.IsEnabled

Please see the xaml code below:
<ComboBox.Style>
    <MultiBinding Converter="{StaticResource twoBooleanAndConverter}" >
        <Binding Path="Entity.IsPreDefined" Mode="OneWay" Converter="{StaticResource invertedBooleanConverter}" />
        <Binding Path="Entity.IsAdded" Mode="OneWay"/>
    </MultiBinding>
</ComboBox.Style>

The problem is in twoBooleanAndConverter, the first input value is always UnSetValue. If I don't use inverterBooleanConverter, the input values in twoBooleanAndConverter are correct.
It's very strange that with the sample code in the beginning, if I bind to ComboBox.IsEnabled property (change ComboBox.Style to ComboBox.IsEnabled), it works well - the input values for twoBooleanAndConverter are correct.
Anyone has idea in this case?
Thank you very much.

推荐答案

Could you please provide a small, complete and ready-to-run example to demonstrate the issue you are encountering?

谢谢

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