使用全局变量的WPF应用程序

I created a WPF application in c# with 3 different windows, Home.xaml, Name.xaml, Config.xaml. I want to declare a variable in Home.xaml.cs that I can use in both the other forms. I tried doing public string wt = ""; but that didn't work.

我在c＃中创建了一个带有3个不同窗口的WPF应用程序，Home.xaml，Name.xaml，Config.xaml。我想在Home.xaml.cs中声明一个我可以在其他两种形式中使用的变量。我试过做公共字符串wt =“”;但那没用。

How can I make it usable by all three forms?

我怎样才能使这三种形式都可用？

5 个解决方案

#1

The proper way, especially if you ever want to move to XBAPP, is to store it in

正确的方法，特别是如果你想转移到XBAPP，是将它存储在

Application.Current.Properties

which is a Dictionary object.

这是一个Dictionary对象。

#2

You can use a static property:

您可以使用静态属性：

public static class ConfigClass()
{
    public static int MyProperty { get; set; }
}

Edit:

编辑：

The idea here is create a class that you holds all "common data", typically configurations. Of course, you can use any class but suggest you to use a static class. You can access this property like this:

这里的想法是创建一个类，您可以保存所有“常见数据”，通常是配置。当然，您可以使用任何类，但建议您使用静态类。您可以像这样访问此属性：

Console.Write(ConfigClass.MyProperty)

#3

To avoid having to pass around values between windows and usercontrols, or creating a static class to duplicate existing functionality within WPF, you could use:

为了避免在Windows和用户控件之间传递值，或者创建静态类来复制WPF中的现有功能，您可以使用：

setting: App.Current.Properties["NameOfProperty"] = 5;
设置：App.Current.Properties [“NameOfProperty”] = 5;
getting: string myProperty = App.Current.Properties["NameOfProperty"];
获取：string myProperty = App.Current.Properties [“NameOfProperty”];

This was mentioned above, but the syntax was a little off.

这是上面提到的，但语法有点偏。

This provides global variables within your application, accessible from any code running within it.

这在您的应用程序中提供了全局变量，可以从其中运行的任何代码访问。

#4

There are two different things you can do here (among others; these are just the two that come to mind first).

你可以在这里做两件不同的事情（除此之外;这些只是我们首先想到的两件事）。

You could make the variable static on Home.xaml.cs

您可以在Home.xaml.cs上将变量设置为static

public static string Foo = "";

public static string Foo =“”;
You could just pass in the variable to all three forms.

您可以将变量传递给所有三种形式。

I would go with #2, myself, and if necessary create a separate class that contains the data I need. Then each class would have access to the data.

我会自己选择＃2，如有必要，创建一个包含我需要的数据的单独类。然后每个类都可以访问数据。

#5

App.xaml:

App.xaml中：

<Application x:Class="WpfTutorialSamples.App"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:sys="clr-namespace:System;assembly=mscorlib"
         StartupUri="WPF application/ResourcesFromCodeBehindSample.xaml">
<Application.Resources>
    <sys:String x:Key="strApp">Hello, Application world!</sys:String>
</Application.Resources>

code behind

代码背后

Application.Current.FindResource("strApp").ToString()

#1