如何获取列表<字符串>WPF 中来自 app.config 的值的集合? [英] How to get a List<string> collection of values from app.config in WPF?
问题描述
以下示例使用我从代码中获得的 BackupDirectories 列表填充 ItemsControl.
The following example fills the ItemsControl with a List of BackupDirectories which I get from code.
如何更改此设置以便从 app.config 文件中获得相同的信息?
XAML:
<Window x:Class="TestReadMultipler2343.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Window1" Height="300" Width="300">
<Grid Margin="10">
<Grid.RowDefinitions>
<RowDefinition Height="30"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="120"/>
<ColumnDefinition Width="160"/>
</Grid.ColumnDefinitions>
<TextBlock
Grid.Row="0"
Grid.Column="0"
Text="Title:"/>
<TextBlock
Grid.Row="0"
Grid.Column="1"
Text="{Binding Title}"/>
<TextBlock
Grid.Row="1"
Grid.Column="0"
Text="Backup Directories:"/>
<ItemsControl
Grid.Row="1"
Grid.Column="1"
ItemsSource="{Binding BackupDirectories}"/>
</Grid>
</Window>
代码隐藏:
using System.Collections.Generic;
using System.Windows;
using System.Configuration;
using System.ComponentModel;
namespace TestReadMultipler2343
{
public partial class Window1 : Window, INotifyPropertyChanged
{
#region ViewModelProperty: Title
private string _title;
public string Title
{
get
{
return _title;
}
set
{
_title = value;
OnPropertyChanged("Title");
}
}
#endregion
#region ViewModelProperty: BackupDirectories
private List<string> _backupDirectories = new List<string>();
public List<string> BackupDirectories
{
get
{
return _backupDirectories;
}
set
{
_backupDirectories = value;
OnPropertyChanged("BackupDirectories");
}
}
#endregion
public Window1()
{
InitializeComponent();
DataContext = this;
Title = ConfigurationManager.AppSettings.Get("title");
GetBackupDirectoriesInternal();
}
void GetBackupDirectoriesInternal()
{
BackupDirectories.Add(@"C:\test1");
BackupDirectories.Add(@"C:\test2");
BackupDirectories.Add(@"C:\test3");
BackupDirectories.Add(@"C:\test4");
}
void GetBackupDirectoriesFromConfig()
{
//BackupDirectories = ConfigurationManager.AppSettings.GetValues("backupDirectories");
}
#region INotifiedProperty Block
public event PropertyChangedEventHandler PropertyChanged;
protected void OnPropertyChanged(string propertyName)
{
PropertyChangedEventHandler handler = PropertyChanged;
if (handler != null)
{
handler(this, new PropertyChangedEventArgs(propertyName));
}
}
#endregion
}
}
app.config:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<appSettings>
<add key="title" value="Backup Tool" />
<!--<add key="backupDirectories">
<add value="C:\test1"/>
<add value="C:\test2"/>
<add value="C:\test3"/>
<add value="C:\test4"/>
</add>-->
</appSettings>
</configuration>
推荐答案
您可以在 app.config 文件中创建自己的自定义配置部分.有相当多的少数 教程 周围 让你开始.最终,你可能会有这样的事情:
You can create your own custom config section in the app.config file. There are quite a few tutorials around to get you started. Ultimately, you could have something like this:
<configSections>
<section name="backupDirectories" type="TestReadMultipler2343.BackupDirectoriesSection, TestReadMultipler2343" />
</configSections>
<backupDirectories>
<directory location="C:\test1" />
<directory location="C:\test2" />
<directory location="C:\test3" />
</backupDirectories>
为了补充 Richard 的回答,这是您可以在他的示例配置中使用的 C#:
To complement Richard's answer, this is the C# you could use with his sample configuration:
using System.Collections.Generic;
using System.Configuration;
using System.Xml;
namespace TestReadMultipler2343
{
public class BackupDirectoriesSection : IConfigurationSectionHandler
{
public object Create(object parent, object configContext, XmlNode section)
{
List<directory> myConfigObject = new List<directory>();
foreach (XmlNode childNode in section.ChildNodes)
{
foreach (XmlAttribute attrib in childNode.Attributes)
{
myConfigObject.Add(new directory() { location = attrib.Value });
}
}
return myConfigObject;
}
}
public class directory
{
public string location { get; set; }
}
}
然后可以访问backupDirectories配置部分如下:
Then you can access the backupDirectories configuration section as follows:
List<directory> dirs = ConfigurationManager.GetSection("backupDirectories") as List<directory>;
这篇关于如何获取列表<字符串>WPF 中来自 app.config 的值的集合?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!