WPF触发快乐帮助 [英] WPF Trigger Happy help

问题描述

我急需帮助.我有一个名为_Reprint的变量，该变量在名为打印"的项目中的类Print构造函数中设置为true或false.然后，我在另一个名为Controls的项目中拥有一个打印屏幕视图.如果_Reprint = false，我想将此屏幕上的文本框设置为可见.如何在xaml中执行此操作?我知道这与触发器有关，但我似乎无法正确地做到这一点.这两个项目都包含在一个名为PrintingExpo的大项目中.希望我的问题足够清楚.在此先感谢

Hi guys I need help urgently. I have a variable _Reprint which is set to true or false in my class Print constructor in a project called Printing. Then i have a printscreen view in another project called Controls. I want to set textboxes on this screen to visible if the _Reprint = false. How do i do this in xaml? I know it''s to do with triggers but i can''t seem to get it right. Both projects are contained in one big project called PrintingExpo. Hope my question is clear enough. Thanks in advance

推荐答案

首先，您必须具有一个DependencyProperty或使用INotifyPropertyChanged的常规属性.

其次，如果您已经在使用Style，则仅使用触发器，即仅出于添加触发器的目的而不会为控件创建Style.如果您还没有Style用于其他用途，请绑定TextBox es的Visibility属性并使用BooleanToVisibilityConveter.

First of you must have a property which is either a DependencyProperty or normal property which utilizes INotifyPropertyChanged.

Second only use a trigger if you''re already working with a Style, that is do not create a Style for a control for the sole purpose of adding triggers. If you do not already have a Style for some other purpose, then bind the Visibility property of your TextBoxes and use the BooleanToVisibilityConveter .

为此，您将使用DataTriggers.

For this you would use DataTriggers.

<style>
   <datatrigger binding="{Binding Path=Reprint}">
        <setter property="Visibility" value="Visible" />
   </datatrigger>
</style>

另外，您的转载"属性必须是公开的.

Also, your "Reprint" property needs to be public.

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