Question

我的代码无法读取文本文件。显然; y，当我想阅读文件时，他们给了我一个“找不到文件！”它位于if else循环中的消息框，表示if循环中的代码不起作用。所以我需要一些帮助。这个问题仍然没有答案。通过下面提供这么多代码，我只是希望它可以帮助你了解我在这里的问题，因为我不擅长编程，我只是想尝试合作。对那些我很烦恼的人感到抱歉。你们给出的每一个答案都意味着什么，我非常感谢你的帮助。

CreateTextPage XAML：

  <TextBox Margin="0,217,0,338" TextWrapping="Wrap" Text="{Binding FileName, Mode=TwoWay}" HorizontalAlignment="Right" Width="480" IsReadOnly="False" Name="textFileName" />
     <TextBox Text="{Binding FileText1, Mode=TwoWay}" HorizontalAlignment="Left" Width="447" Height="378" VerticalAlignment="Top" Name="text1" />
    <TextBox Text="{Binding FileText2, Mode=TwoWay}" HorizontalAlignment="Left" Width="447" Height="378" VerticalAlignment="Top" Name="text2"/>

CreateTextPage：

private void Button_Click(object sender, RoutedEventArgs e)
        {
            AddFileModel model = this.LayoutRoot.DataContext as AddFileModel;
            model.SaveFile.Execute(null);
            model.FileName = string.Empty;

            model.FileText1 = string.Empty;
            model.FileText2 = string.Empty;


            MessageBox.Show("File saved successfully");

            NavigationService.Navigate(new Uri("/CompleteQuestionPage.xaml", UriKind.Relative));

        }

ReadFilePage XAML：

 <TextBlock HorizontalAlignment="Right" Margin="0,0,-409,-260" TextWrapping="Wrap" VerticalAlignment="Bottom" Width="333" Text="{Binding FileName, Mode=TwoWay}" Name="titleText" />
 <TextBlock TextWrapping="Wrap" Height="378" Width="452"  Text="{Binding FileText1, Mode=TwoWay}" Name="textBlocky1" />
  <TextBlock TextWrapping="Wrap" Height="378" Width="452" Text="{Binding FileText2, Mode=TwoWay}" Name="textBlocky2" />

ReadFilePage：

 private void PhoneApplicationPage_Loaded(object sender, RoutedEventArgs e)
        {
            AddFileModel model = this.LayoutRoot.DataContext as AddFileModel;
            model.ReadSelectedFiles.Execute(null);

        }

下面是负责该方法的类文件。

AddFileModel类文件：

namespace WindowsPhoneApplication1.Model
{
    public class AddFileModel : ModelBase
    {



        private string _filename;
        public string FileName
        {
            get
            {
                return this._filename;
            }
            set
            {
                this._filename = value;
                this.OnPropertyChanged("FileName");
            }

        }

        private string _filetext1;
        public string FileText1
        {
            get
            {
                return this._filetext1;
            }
            set
            {
                this._filetext1 = value;
                this.OnPropertyChanged("FileText1");
            }

        }

        private string _filetext2;
        public string FileText2
        {
            get
            {
                return this._filetext2;
            }
            set
            {
                this._filetext2 = value;
                this.OnPropertyChanged("FileText2");
            }
        }


        private ICommand _saveFile;
        public ICommand SaveFile
        {
            get
            {
                this._saveFile = this._saveFile ?? new DelegateCommand(this.OnSaveFile);
                return this._saveFile;
            }
        }

         private ICommand _readSelectedFiles;
        public ICommand ReadSelectedFiles
        {
            get
            {
                this._readSelectedFiles = this._readSelectedFiles ?? new DelegateCommand(this.OnReadSelected);
                return this._readSelectedFiles;
            }
        }

        private void OnSaveFile()
        {
            if (!string.IsNullOrEmpty(this.FileName))
            {
                using (var store = IsolatedStorageFile.GetUserStoreForApplication())
                {
                    if (store.FileExists(FileName))
                        store.DeleteFile(FileName);

                    using (var fileStream = store.OpenFile(FileName, FileMode.Create, FileAccess.Write))
                    {
                        using (var writer = new StreamWriter(fileStream))
                        {

                            writer.WriteLine(FileName);
                            writer.WriteLine(FileText1);
                            writer.WriteLine(FileText2);


                        }
                    }
                }
            }
        }

        private void OnReadSelected()
        {
            using (var store = IsolatedStorageFile.GetUserStoreForApplication())
            {
                if (store.FileExists(FileName))
                {
                    using (var fileStream = store.OpenFile(FileName, FileMode.Open, FileAccess.Read))
                    {
                        using (var reader = new StreamReader(fileStream))
                        {
                            FileName = reader.ReadLine();
                            FileText1 = reader.ReadLine();
                            FileText2 = reader.ReadLine();
                        }
                    }
                }
                else
                {
                    MessageBox.Show("File not found!");
                }
            }
        }
    }
}

Answer 1

您发布的代码运行正常。您的问题必须在应用程序逻辑的其他位置。在您的读取逻辑中，在执行ReadSelectedFiles命令之前，您似乎没有设置FileName属性。您的代码需要设置此代码，因为这是它尝试查找的文件名。除非你在其他地方设置这个，否则这可能是问题的原因。

所以也许像

    private void PhoneApplicationPage_Loaded(object sender, RoutedEventArgs e)
    {
        AddFileModel model = this.LayoutRoot.DataContext as AddFileModel;
        model.FileName = "myFile.dat";
        model.ReadSelectedFiles.Execute(null);

    }

不读取已保存的隔离存储中的文本

1 个答案: