如何验证，仅允许用户选择1个文件进行读取？ [英] How to validate, only allowing the user to select 1 file to read?

问题描述

以下是允许用户读取文件的代码。如何允许用户仅选择1个文件进行读取？

Below are the codes to allow the user to read a File. How to allow the user to select only 1 file to read?

private void button3_Click(object sender, RoutedEventArgs e)
            {

                ViewDiskModel model = this.ContentPanel.DataContext as ViewDiskModel;
                if (model.Files.Any(file => file.IsChecked))
                {
                    model.ReadSelectedFiles.Execute(null);


                    NavigationService.Navigate(new Uri("/AnswerQuestionPage.xaml", UriKind.Relative));
                }
                else
                    if ((model.Files.Any(file => file.IsChecked)) > 1)
                {
                    MessageBox.Show("Please Select only 1 File.");
                }
            }

推荐答案

替换 model.Files.Any（file => file.IsChecked）与 model.Files.Count（file => file.IsChecked）== 1 。

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