与绑定的StringFormat MultiBinding [英] MultiBinding with binding StringFormat

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本文介绍了与绑定的StringFormat MultiBinding的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我试图用结合上的StringFormat显示一些标签与MultiBinding。

I am trying to display some label with MultiBinding with Binding on StringFormat.

像这样:

<Label.Content>
    <TextBlock>
        <TextBlock.Text>
            <MultiBinding StringFormat="{Binding LabelStringFormat, Source={DynamicResource Texts}}">
                <Binding Path="Lib1" />
                <Binding Path="Lib2" />
            </MultiBinding>
        </TextBlock.Text>
    </TextBlock>
</Label.Content>

LabelStringFormat能像[{0} / {1}]或类似的东西。它在构建已知,但必须从资源使用。

LabelStringFormat can be something like "[{0}/{1}]" or something like that. It is known in build but must be used from Resource.

但是,当我使用类似code以上,我得到错误:

But when I use something like code above, I get error:

A 'Binding' cannot be set on the 'StringFormat' property of type 'MultiBinding'. A 'Binding' can only be set on a DependencyProperty of a DependencyObject.

我可以使用绑定的内容,并在视图模型创建的字符串,但它是被忽视的时候有更多的标签,像这样的。

I can use binding on Content and create string in ViewModel, but it is unnoticed when there is more labels like this one.

谢谢
的Jakub

Thanks Jakub

解决方案:

使用转换器:

public class StringMultiValueConverter : IMultiValueConverter
{
    public object Convert(object[] values, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        return string.Format(values.Last() as string, values);
    }

    public object[] ConvertBack(object value, Type[] targetTypes, object parameter, System.Globalization.CultureInfo culture)
    {
        throw new NotImplementedException();
    }
}

在WPF添加到转换资源:

In WPF add convertor to Resources:

<UserControl.Resources>
    <ResourceDictionary>
        <myComponents:StringMultiValueConverter x:Key="stringMultiValueConverter"/>
    </ResourceDictionary>
</UserControl.Resources>

在添加标签:

<Label.Content>
    <TextBlock>
        <TextBlock.Text>
            <MultiBinding Converter="{StaticResource stringMultiValueConverter}">
                <Binding Path="Lib1" />
                <Binding Path="Lib2" />
                <Binding Path="LabelStringFormat" Source="{Dynamic Texts}"/>
            </MultiBinding>
        </TextBlock.Text>
    </TextBlock>
</Label.Content>

这工作的时候字符串格式是Multibinding的最后一个参数。

This work when string format is last param of Multibinding.

推荐答案

只需添加LabelStringFormat作为一个参数多绑定:

Just add the "LabelStringFormat" as a parameter of the multi-binding:

<MultiBinding>
    <Binding Path="Lib1" />
    <Binding Path="Lib2" />
    <Binding Path="LabelStringFormat" Source="{DynamicResource Texts}" />
</MultiBinding>

使用您的IValueConverter执行格式化的String.Format((字符串)值[2],值[0],价值[1])

这篇关于与绑定的StringFormat MultiBinding的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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