WPF(5)----文件浏览对话框

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WPF中文件浏览对话框的实现可以利用Windows API Code Pack，它是一个用于访问Windows Vista/7 特性的托管代码函数库，但并没有包含在.NET 4.0中。

该代码包的特性如下所示：

支持Windows Shell命名空间对象，包括新的Windows 7资源库（Libraries）、固定名称文件夹和非文件系统容器。
Windows Vista和Windows 7任务对话框（Task Dialogs）。
支持WPF和Windows Forms的Windows 7资源管理器浏览器控件（Explorer Browser Control）。
支持Shell的属性系统。
用于Windows 7任务栏Jumplists、Icon Overlay和Progress Bar的帮助程序。
支持Windows Vista和Windows 7的通用文件对话框，并包括了自定义文件对话框控件。
支持Direct3D 11.0和DXGI 1.0/1.1的API。
传感器平台（Sensor Platform）API
扩展的语言服务（Extended Linguistic Services）API。

1：代码包下载之后，解压，将其中的Microsoft.WindowsAPICodePack.dll 和Microsoft.WindowsAPICodePack.Shell.dll拷贝至工程中。然后Reference-->Add将其添加至Project中的References。

2：代码编写时，将其导入命名空间：

using Microsoft.WindowsAPICodePack.Shell;using Microsoft.WindowsAPICodePack.Dialogs;

3：前台xmal代码如下：

<Window x:Class="WpfFileExploerDialog.MainWindow"        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"        Title="MainWindow" Height="148" Width="434" Background="#E609072F">    <Grid Name="Grid1">        <TextBox Height="25" Text = "{Binding Path=TextBoxValue}" HorizontalAlignment="Left" Margin="15,29,0,0" Name="textBoxFilePath" VerticalAlignment="Top" Width="347" />        <Button Content="..." Click="ButtonFileSelect" Height="24" HorizontalAlignment="Left" Margin="377,30,0,0" Name="buttonFileDialog" VerticalAlignment="Top" Width="25" />    </Grid></Window>

4：后台xmal.cs代码如下：

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Windows;using System.Windows.Controls;using System.Windows.Data;using System.Windows.Documents;using System.Windows.Input;using System.Windows.Media;using System.Windows.Media.Imaging;using System.Windows.Navigation;using System.Windows.Shapes;using System.ComponentModel;  using Microsoft.WindowsAPICodePack.Shell;using Microsoft.WindowsAPICodePack.Dialogs;namespace WpfFileExploerDialog{    /// <summary>    /// Interaction logic for MainWindow.xaml    /// </summary>    public partial class MainWindow : Window, INotifyPropertyChanged      {        public MainWindow()        {            InitializeComponent();            Grid1.DataContext = this;         }        public event PropertyChangedEventHandler PropertyChanged;        protected void NotifyPropertyChanged(string property)        {            if (PropertyChanged != null)            {                PropertyChanged(this, new PropertyChangedEventArgs(property));            }        }        private string _Value2;        public string TextBoxValue        {            get { return _Value2; }            set            {                if (value != _Value2)                {                    _Value2 = value;                    NotifyPropertyChanged("TextBoxValue");                }            }        }          private void ButtonFileSelect(object sender, RoutedEventArgs e)        {            ShellContainer selectedFolder = null;            selectedFolder = KnownFolders.Computer as ShellContainer;            CommonOpenFileDialog commonOpenFileDialog = new CommonOpenFileDialog();            commonOpenFileDialog.InitialDirectoryShellContainer = selectedFolder;            commonOpenFileDialog.EnsureReadOnly = true;            if (commonOpenFileDialog.ShowDialog() == CommonFileDialogResult.Ok)            {                TextBoxValue = commonOpenFileDialog.FileName;            }        }    }}

5：程序运行结果如下：

另外，还可以将文件浏览窗口直接定位到固定的文件夹，并且添加想要的文件过滤器，例如下面的代码就是将其定位到SampleVideos文件夹：

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Windows;using System.Windows.Controls;using System.Windows.Data;using System.Windows.Documents;using System.Windows.Input;using System.Windows.Media;using System.Windows.Media.Imaging;using System.Windows.Navigation;using System.Windows.Shapes;using System.ComponentModel;  using Microsoft.WindowsAPICodePack.Shell;using Microsoft.WindowsAPICodePack.Dialogs;namespace WpfFileExploerDialog{    /// <summary>    /// Interaction logic for MainWindow.xaml    /// </summary>    public partial class MainWindow : Window, INotifyPropertyChanged      {        public MainWindow()        {            InitializeComponent();            Grid1.DataContext = this;         }        public event PropertyChangedEventHandler PropertyChanged;        protected void NotifyPropertyChanged(string property)        {            if (PropertyChanged != null)            {                PropertyChanged(this, new PropertyChangedEventArgs(property));            }        }        private string _Value2;        public string TextBoxValue        {            get { return _Value2; }            set            {                if (value != _Value2)                {                    _Value2 = value;                    NotifyPropertyChanged("TextBoxValue");                }            }        }          private void ButtonFileSelect(object sender, RoutedEventArgs e)        {            ShellContainer selectedFolder = null;            //文件夹定位至SampleVideos            selectedFolder = KnownFolders.SampleVideos as ShellContainer;            CommonOpenFileDialog commonOpenFileDialog = new CommonOpenFileDialog();            commonOpenFileDialog.InitialDirectoryShellContainer = selectedFolder;            commonOpenFileDialog.EnsureReadOnly = true;            //设置文件过滤            commonOpenFileDialog.Filters.Add(new CommonFileDialogFilter("WMV Files", "*.wmv"));            commonOpenFileDialog.Filters.Add(new CommonFileDialogFilter("AVI Files", "*.avi"));            commonOpenFileDialog.Filters.Add(new CommonFileDialogFilter("MP3 Files", "*.mp3"));            commonOpenFileDialog.Filters.Add(new CommonFileDialogFilter("MKV Files", "*.mkv"));            if (commonOpenFileDialog.ShowDialog() == CommonFileDialogResult.Ok)            {                TextBoxValue = commonOpenFileDialog.FileName;            }        }    }}