本文共 2326 字，大约阅读时间需要 7 分钟。
1、选择单个文件，FileTypeFilter.Add是添加能访问的文件类型。
private async void filePickerBtn_Click( object sender, RoutedEventArgs e) { FileOpenPicker fileOpenPicker = new FileOpenPicker(); fileOpenPicker.FileTypeFilter.Add( ".jpg" ); fileOpenPicker.FileTypeFilter.Add( ".jpeg" ); fileOpenPicker.FileTypeFilter.Add( ".png" ); fileOpenPicker.SuggestedStartLocation = PickerLocationId.PicturesLibrary; StorageFile file = await fileOpenPicker.PickSingleFileAsync(); if (file != null ) { displayTextBlock.Text = file.Name; } } |
2、选择多个文件，并且是任意文件类型
private async void filePickerBtn_Click( object sender, RoutedEventArgs e) { FileOpenPicker fileOpenPicker = new FileOpenPicker(); fileOpenPicker.FileTypeFilter.Add( "*" ); fileOpenPicker.SuggestedStartLocation = PickerLocationId.PicturesLibrary; IReadOnlyList<StorageFile> files = await fileOpenPicker.PickMultipleFilesAsync(); if (files.Count > 0) { foreach (StorageFile file in files) { displayTextBlock.Text += file.Name + "\n" ; } } } |
3、 选择文件夹
private async void folderPickerBtn_Click( object sender, RoutedEventArgs e) { if (EnsureUnsnapped()) { FolderPicker folderPicker = new FolderPicker(); folderPicker.SuggestedStartLocation = PickerLocationId.Desktop; folderPicker.FileTypeFilter.Add( "*" ); StorageFolder storageFolder = await folderPicker.PickSingleFolderAsync(); if ( null != storageFolder) { displayTextBlock.Text = storageFolder.Name; } } } |
FilePicker APIs是不能在snapped状态下使用
bool EnsureUnsnapped() { //FilePicker APIs不能再snapped状态下使用。 return ((ApplicationView.Value != ApplicationViewState.Snapped) || ApplicationView.TryUnsnap()); } |
4、保存文件
private async void SaveFileBtn_Click( object sender, RoutedEventArgs e) { if (EnsureUnsnapped()) { FileSavePicker savePicker = new FileSavePicker(); savePicker.SuggestedStartLocation = PickerLocationId.Desktop; savePicker.FileTypeChoices.Add( "Text" , new List< string >() { ".txt" }); savePicker.FileTypeChoices.Add( "Word Docment" , new List< string >() { ".docx" , ".doc" }); savePicker.DefaultFileExtension = ".txt" ; savePicker.SuggestedFileName = "New Document" ; StorageFile storageFile = await savePicker.PickSaveFileAsync(); if ( null != storageFile) { displayTextBlock.Text = storageFile.Name; } } } |
选择保存的文件保存自己要求的文件。自定义文件类型和文件名。
本文转自Work Hard Work Smart博客园博客，原文链接：http://www.cnblogs.com/linlf03/archive/2012/03/27/2400416.html，如需转载请自行联系原作者