wpf 仅绑定标签的一部分
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Binding only part of a label
提问by Neil Barnwell
How would one achieve mixing bound values with constant text in a WPF bound control?
如何在 WPF 绑定控件中实现将绑定值与常量文本混合？
For example, say I have a form displaying orders, and I want a label that displays text like "Order ID 1234".
例如，假设我有一个显示订单的表单，我想要一个显示“订单 ID 1234”等文本的标签。
I've tried things like:
我试过这样的事情：
text="Order ID {Binding ....}"
Is this achievable, or do I have to do something like having more than one label in a flow control?
这是可以实现的，还是我必须做一些事情，比如在流控制中拥有多个标签？
采纳答案by Inferis
If you're using 3.5 SP1, you can use the StringFormatproperty on the binding:
如果您使用的是 3.5 SP1，则可以使用StringFormat绑定上的属性：
<Label Content="{Binding Order.ID, StringFormat=Order ID \{0\}}"/>
Otherwise, use a converter:
否则，请使用转换器：
<local:StringFormatConverter x:Key="StringFormatter" StringFormat="Order ID {0}" />
<Label Content="{Binding Order.ID, Converter=StringFormatter}"/>
With StringFormatConverterbeing an IValueConverter:
随着StringFormatConverter作为一个IValueConverter：
[ValueConversion(typeof(object), typeof(string))]
public class StringFormatConverter : IValueConverter
{
public string StringFormat { get; set; }
public object Convert(object value, Type targetType,
object parameter, CultureInfo culture) {
if (string.IsNullOrEmpty(StringFormat)) return "";
return string.Format(StringFormat, value);
}
public object ConvertBack(object value, Type targetType,
object parameter, CultureInfo culture)
{
throw new NotSupportedException();
}
That'll do the trick.
这样就行了。
[Edit: Change the Textproperty to Content]
[编辑：将Text属性更改为Content]
回答by LPCRoy
The Binding.StringFormat property doesn't work on Labels, you need to use the ContentStringFormat property on the Label.
For example, the following sample will work:
Binding.StringFormat 属性对标签不起作用，您需要在标签上使用 ContentStringFormat 属性。
例如，以下示例将起作用：
<Label>
<Label.Content>
<Binding Path="QuestionnaireName"/>
</Label.Content>
<Label.ContentStringFormat>
Thank you for taking the {0} questionnaire
</Label.ContentStringFormat>
</Label>
The same as short Version:
与短版相同：
<Label Content="{Binding QuestionnaireName}" ContentStringFormat="Thank you for taking the {0} questionnaire" />
Using it to display a unit after the value:
使用它在值后显示一个单位：
<Label Content="{Binding Temperature}" ContentStringFormat="{}{0}°C" />
While this sample will not:
虽然此示例不会：
<Label>
<Label.Content>
<Binding Path="QuestionnaireName" StringFormat="Thank you for taking the {0} questionnaire"/>
</Label.Content>
</Label>
回答by bendewey
Often overlooked is simply chaining multiple textblocks together for example
例如，经常被忽视的是简单地将多个文本块链接在一起
<TextBlock Text="{Binding FirstName}" />
<TextBlock Text=" " />
<TextBlock Text="{Binding LastName}" />
回答by Rob Walker
Another approach is to use a single TextBlock with multiple Run elements within it:
另一种方法是使用包含多个 Run 元素的单个 TextBlock：
<TextBlock><Run>Hello</Run><Run>World</Run></TextBlock>
.. but to bind to a element you need to use add a BindableRunclass.
.. 但是要绑定到一个元素，你需要使用添加一个BindableRun类。
UpdateBut there are some drawbacks to this technique ... see here
更新但是这种技术有一些缺点……见这里
回答by Miko?aj
I found another one approach. @Inferis's solution doesn't work for me and @LPCRoy's isn't elegant for me:
我找到了另一种方法。@Inferis 的解决方案对我不起作用，@LPCRoy 的解决方案对我来说并不优雅：
<Label Content="{Binding Path=Order.ID, FallbackValue=Placeholder}" ContentStringFormat="Order ID {0}">
It's my favourite at this moment, it's seems flexible and condensed.
这是我此刻最喜欢的，它看起来灵活而凝练。
回答by Jogi Joseph George
Modified Mikolaj's answer.
修改了 Mikolaj 的答案。
<Label Content="{Binding Order.ID}" ContentStringFormat="Order ID {0}" />
FallbackValue is not a must.
FallbackValue 不是必须的。
