wpf 绑定到设置中定义的值
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Bind to a value defined in the Settings
提问by CSharper
In WPF, Can I use binding with values defined in Settings? If this is possible, please provide a sample.
在 WPF 中，我可以将绑定与设置中定义的值结合使用吗？如果可能，请提供样本。
回答by CSharper
First, you need to add a custom XML namespace that will design the namespace where the settings are defined:
首先，您需要添加一个自定义 XML 命名空间，用于设计定义设置的命名空间：
xmlns:properties="clr-namespace:TestSettings.Properties"
Then, in your XAML file, access the default settings instance using the following syntax:
然后，在您的 XAML 文件中，使用以下语法访问默认设置实例：
{x:Static properties:Settings.Default}
So here is the final result code:
所以这是最终的结果代码：
<ListBox x:Name="lb"
ItemsSource="{Binding Source={x:Static properties:Settings.Default},
Path=Names}" />
Source: WPF - How to bind a control to a property defined in the Settings?
Note: As pointed out by @Daniel and @nabulke, don't forget to set Access Modifierof your settings file to Publicand Scopeto User
注意：正如@Daniel 和@nabulke 所指出的，不要忘记将设置文件的Access Modifier设置为Public和Scope设置为User
回答by Thomas Levesque
The solution above does work, but I find it quite verbose... you could use a custom markup extension instead, that could be used like this :
上面的解决方案确实有效，但我发现它非常冗长……您可以改用自定义标记扩展，可以像这样使用：
<ListBox x:Name="lb" ItemsSource="{my:SettingBinding Names}" />
Here is the code for this extension :
这是此扩展程序的代码：
public class SettingBindingExtension : Binding
{
public SettingBindingExtension()
{
Initialize();
}
public SettingBindingExtension(string path)
:base(path)
{
Initialize();
}
private void Initialize()
{
this.Source = WpfApplication1.Properties.Settings.Default;
this.Mode = BindingMode.TwoWay;
}
}
More details here : http://www.thomaslevesque.com/2008/11/18/wpf-binding-to-application-settings-using-a-markup-extension/
更多细节在这里：http: //www.thomaslevesque.com/2008/11/18/wpf-binding-to-application-settings-using-a-markup-extension/
回答by Christopher Kyle Horton
@CSharper's answer did not work for my WPF application coded in VB.NET (not C#, unlike apparently 99.999% of other WPF applications), as I got a persistent compiler error complaining that Settingscould not be found in the MyApp.Propertiesnamespace, which would not go away even after rebuilding.
@CSharper 的答案不适用于我用 VB.NET 编码的 WPF 应用程序（不是 C#，显然与 99.999% 的其他 WPF 应用程序不同），因为我收到了一个持续的编译器错误，抱怨Settings在MyApp.Properties命名空间中找不到，这不会即使在重建后也离开。
What worked instead for me, after much searching online, was to instead use the localXAML namespace created by default in my application's main window XAML file:
在网上进行了大量搜索之后，对我有用的是改为使用local在我的应用程序的主窗口 XAML 文件中默认创建的XAML 命名空间：
<Window
<!-- Snip -->
xmlns:local="clr-namespace:MyApp"
<!-- Snip -->
><!-- Snip --></Window>
...and bind to my settings through it using something like the following (where MyBooleanSettingis a setting I defined in my project properties of type Booleanand scope User, with the default Friend access modifier):
...并使用类似以下内容通过它绑定到我的设置（MyBooleanSetting我在我的项目属性中定义的类型Boolean和范围用户的设置，使用默认的 Friend 访问修饰符）：
<CheckBox IsChecked="{Binding Source={x:Static local:MySettings.Default}, Path=MyBooleanSetting, Mode=TwoWay}"
Content="This is a bound CheckBox."/>
To ensure the settings are actually saved, be sure to call
为确保实际保存设置，请务必调用
MySettings.Default.Save()
...somewhere in your code-behind (such as in the Me.Closingevent for your MainWindow.xaml.vbfile).
...在您的代码隐藏中的某个地方（例如在Me.Closing您的MainWindow.xaml.vb文件的事件中）。
(Credit to this Visual Studio forum postfor the inspiration; see the reply by Muhammad Siddiqi.)
（归功于此Visual Studio 论坛帖子的灵感；请参阅 Muhammad Siddiqi 的回复。）
回答by nPcomp
Here's how I bind the UserSettings:
这是我绑定 UserSettings 的方法：
Generate a dependency variable by typing propdpand then tab twice.
通过键入propdp然后 Tab 两次来生成依赖变量。
public UserSettings userSettings
{
get { return (UserSettings)GetValue(userSettingsProperty); }
set { SetValue(userSettingsProperty, value); }
}
public static readonly DependencyProperty userSettingsProperty =
DependencyProperty.Register("userSettings", typeof(UserSettings), typeof(MainWindow), new PropertyMetadata(UserSettings.Default));
Now, you can bind userSettingsby:
现在，您可以userSettings通过以下方式绑定：
Value="{Binding userSettings.SomeUserSettingHere, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
And make sure you save UserSettings when you change them or on Exit by:
并确保在更改用户设置或退出时保存用户设置：
UserSettings.Default.Save();
