正如您引用的帖子所指出的那样，Microsoft.Extensions.Configuration API旨在作为应用程序的一次性设置，或者至少是只读的。如果您的主要目标是轻松/快速/简单地保存用户设置，可以自己编写代码来实现。将设置存储在文件夹中，类似于旧API。
public class SettingsManager<T> where T : class
{
private readonly string _filePath;
public SettingsManager(string fileName)
{
_filePath = GetLocalFilePath(fileName);
}
private string GetLocalFilePath(string fileName)
{
string appData = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
return Path.Combine(appData, fileName);
}
public T LoadSettings() =>
File.Exists(_filePath) ?
JsonConvert.DeserializeObject<T>(File.ReadAllText(_filePath)) :
null;
public void SaveSettings(T settings)
{
string json = JsonConvert.SerializeObject(settings);
File.WriteAllText(_filePath, json);
}
}
一个使用最基本的UserSettings的演示
public class UserSettings
{
public string Name { get; set; }
}
我不会提供完整的MVVM示例，但我们将在内存中拥有一个实例，引用_userSettings。一旦加载设置，演示将覆盖其默认属性。当然，在生产环境中，您不会在启动时提供默认值。这仅用于说明目的。
public partial class MainWindow : Window
{
private readonly SettingsManager<UserSettings> _settingsManager;
private UserSettings _userSettings;
public MainWindow()
{
InitializeComponent();
_userSettings = new UserSettings() { Name = "Funk" };
_settingsManager = new SettingsManager<UserSettings>("UserSettings.json");
}
private void Button_FromMemory(object sender, RoutedEventArgs e)
{
Apply(_userSettings);
}
private void Button_LoadSettings(object sender, RoutedEventArgs e)
{
_userSettings = _settingsManager.LoadSettings();
Apply(_userSettings);
}
private void Button_SaveSettings(object sender, RoutedEventArgs e)
{
_userSettings.Name = textBox.Text;
_settingsManager.SaveSettings(_userSettings);
}
private void Apply(UserSettings userSettings)
{
textBox.Text = userSettings?.Name ?? "No settings found";
}
}
XAML
<Window x:Class="WpfApp.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:WpfApp"
mc:Ignorable="d"
Title="MainWindow" Height="450" Width="800">
<Window.Resources>
<Style TargetType="Button">
<Setter Property="Margin" Value="10"/>
</Style>
</Window.Resources>
<Grid Margin="10">
<Grid.RowDefinitions>
<RowDefinition/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<TextBox Grid.Row="0" x:Name="textBox" Width="150" HorizontalAlignment="Center" VerticalAlignment="Center"/>
<Button Grid.Row="1" Click="Button_FromMemory">From Memory</Button>
<Button Grid.Row="2" Click="Button_LoadSettings">Load Settings</Button>
<Button Grid.Row="3" Click="Button_SaveSettings">Save Settings</Button>
</Grid>
</Window>
