Wpf 基于两个属性确定ContentTempateSelector的值
我无法更改Wpf 基于两个属性确定ContentTempateSelector的值,wpf,xaml,multibinding,datatemplateselector,Wpf,Xaml,Multibinding,Datatemplateselector,我无法更改ContentTemplateSelector的内容。基于两个属性合格性和物品列表,文本块被更新,并通过多重绑定实现。但是,多绑定方法无法应用于模板选择器。这是我的密码: XAML: <Grid> <Grid.ColumnDefinitions> <ColumnDefinition Width="Auto" /> <ColumnDefinition Width="*" /> </G
ContentTemplateSelector
的内容。基于两个属性合格性
和物品列表
,文本块被更新,并通过多重绑定实现。但是,多绑定方法无法应用于模板选择器。这是我的密码:
XAML:
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<ContentControl
Grid.Column="0"
Style="{StaticResource StatusIconStyle}"
Content="{Binding}"
ContentTemplateSelector="{StaticResource IconTemplateSelector}" />
<TextBlock
Grid.Column="1"
TextWrapping="Wrap">
<TextBlock.Text>
<MultiBinding Converter="{StaticResource ListOfThingsToEligibilityString}">
<Binding Path="Eligibility"/>
<Binding Path="ListOfThings" />
</MultiBinding>
</TextBlock.Text>
</TextBlock>
</Grid>
模板选择器:
public override DataTemplate IconTempateSelector(object item,...)
{
var obj = (CompleteObjectInfo)item;
bool isEligible = obj.Eligibility.IsEligibile;
bool hasIssues = obj.ListOfThings != null && obj.ListOfThings.Any();
List<IThings> things = obj.ListOfThings as List<IThings>;
//some logic
if (condition 1)
{
return (DataTemplate)App.Current.TryFindResource("SuccessVImage");
}
else if (condition 2)
{
return (DataTemplate)App.Current.TryFindResource("WarningVImage");
}
else if (consition 3)
{
return (DataTemplate)App.Current.TryFindResource("ErrorVImage");
}
return null;
}
公共覆盖数据模板IconTempateSelector(对象项,…)
{
var obj=(CompleteObjectInfo)项;
bool isEligible=obj.alification.isEligible;
bool hasIssues=obj.ListOfThings!=null&&obj.ListOfThings.Any();
将事物列为列表;
//一些逻辑
如果(条件1)
{
返回(数据模板)App.Current.TryFindResource(“SuccessVImage”);
}
否则,如果(条件2)
{
返回(数据模板)App.Current.TryFindResource(“WarningVImage”);
}
若非如此(考虑3)
{
返回(数据模板)App.Current.TryFindResource(“ErrorVImage”);
}
返回null;
}
多转换器:
ListOfThingsToEligibilityString :
public object Convert(object[] values,...)
{
if (null conditions satisfied)
{
EligibilityDetails eligibility = values[0] as EligibilityDetails ;
List<IThings> things= values[1] as List<IThings>;
bool isEligible = eligibility.IsEligibile;
bool hasIssues = things.Any();
// some code
if (condition 1)
{
return "Message 1";
}
else if (condition 2)
{
return "Message 2";
}
else if (condition 3)
{
return "Message3";
}
else if (condition 4)
{
return "Message 4"
}
}
return string.Empty;
}
ThingstoeligibilityString列表:
公共对象转换(对象[]值,…)
{
if(满足空条件)
{
EligibilityDetails合格性=值[0]作为EligibilityDetails;
将事物=值[1]列为列表;
bool isEligible=合格性。isEligible;
bool hasIssues=things.Any();
//一些代码
如果(条件1)
{
返回“消息1”;
}
否则,如果(条件2)
{
返回“消息2”;
}
否则,如果(条件3)
{
返回“Message3”;
}
否则,如果(条件4)
{
返回“消息4”
}
}
返回字符串。空;
}
任何帮助都将不胜感激。当引发
PropertyChanged
事件时,不会触发ContentTemplateSelector
。它仅用于选择初始的ContentTemplate
您可以尝试将ContentTemplateSelector
替换为包含DataTriggers
的样式
:
<ContentControl Grid.Column="0" Content="{Binding}">
<ContentControl.Style>
<Style TargetType="ContentControl" BasedOn="{StaticResource StatusIconStyle}">
<Style.Triggers>
<DataTrigger Value="Message 1">
<DataTrigger.Binding>
<MultiBinding Converter="{StaticResource ListOfThingsToEligibilityString}">
<Binding Path="Eligibility"/>
<Binding Path="ListOfThings" />
</MultiBinding>
</DataTrigger.Binding>
<Setter Property="ContentTemplate" Value="{StaticResource SuccessVImage}" />
</DataTrigger>
<!-- and so on...-->
</Style.Triggers>
</Style>
</ContentControl.Style>
</ContentControl>