WPF - 绑定 StringFormatting 不起作用
我需要将一个简单的字符串附加到我的命令参数中，但不起作用。 StringFormat 支持这个还是我做错了什么？
<DataTemplate x:Key="ClickableHeaderTemplate">
<Button x:Name="btn" Content="{Binding}" Background="Transparent"
Command="{Binding DrilldownHeaderClicked}"
Tag="{Binding RelativeSource={RelativeSource Self}, Path=Content}"
CommandParameter="{Binding RelativeSource={RelativeSource Self}, Path=Tag, StringFormat=somestring\{0\}}"> --- formatting doesnt work. tried without escape seq as well as in 'somesting{0}'.
</Button>
</DataTemplate>
I need to append a simple string to my commandparameter but doesnt work. Does StringFormat support this or am I doing anything wrong ?
<DataTemplate x:Key="ClickableHeaderTemplate">
<Button x:Name="btn" Content="{Binding}" Background="Transparent"
Command="{Binding DrilldownHeaderClicked}"
Tag="{Binding RelativeSource={RelativeSource Self}, Path=Content}"
CommandParameter="{Binding RelativeSource={RelativeSource Self}, Path=Tag, StringFormat=somestring\{0\}}"> --- formatting doesnt work. tried without escape seq as well as in 'somesting{0}'.
</Button>
</DataTemplate>
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StringFormat 属性仅在目标属性的类型为字符串时才起作用。在本例中，目标属性是 CommandParameter，其类型为对象。您需要创建自己的 IValueConverter 并将其用作绑定的转换器。有一个类似于您需要的示例 IValueConverter IValueConverter 的 SL 文档。
The StringFormat property only works when the Type of the target property is string. In this case the target property is CommandParameter which is of type object. You'll need to create your own IValueConverter and use that as the Converter for your binding. There is an example IValueConverter similar to what you need in the SL docs for IValueConverter.