private async void btnReadBinary_Click(object sender, RoutedEventArgs e)
{
// 在指定的目录下获取指定的文件
StorageFolder storageFolder = await KnownFolders.GetFolderForUserAsync(null, KnownFolderId.DocumentsLibrary);
StorageFile storageFile = await storageFolder.GetFileAsync("webabcdBinary.txt");
if (storageFile != null)
{
// 获取指定文件中的二进制数据，将其转换成字符串并显示
IBuffer buffer = await FileIO.ReadBufferAsync(storageFile);
string textContent = ConverterHelper.Buffer2String(buffer);
lblMsg.Text = "读取结果：" + textContent;
}
}