分享程序员开发的那些事...
更新时间：2022-08-19 17:07:39
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