Windows Phone 7帮助 [英] Windows Phone 7 Help

问题描述

我正在制作基于应用程序的IO概念。

1.首先我必须创建新文件并在其中写入一些文字。

2.其次我已经制作了一个阅读文件的按钮。

3.下次我开始这一步。我应该检查出任何文件退出或不存在。如果存在然后阅读，如果没有创建新的。





上面的介绍中的第三件事给我带来了问题。我没有得到如何为此编写代码。如果有任何人知道，请帮帮我。



我开发的读写代码，这里是

I am making an app based IO Concept .
1. First I have to Create New File and write some text in it.
2. Second I have made a button to read a file .
3. Next time when i start with this step . I should check it out that preciously any file exits or not . if exists then read and if not create new.


The 3rd thing in the introduction above is giving me problem . I am not getting how to write code for this . Please Help me if any body knows about it .

Read and Write codes i have developed and here it is

private void btnWrite_Click(object sender, RoutedEventArgs e)
        {
       // Get the local folder.
    System.IO.IsolatedStorage.IsolatedStorageFile local =
        System.IO.IsolatedStorage.IsolatedStorageFile.GetUserStoreForApplication();

            

    // Create a new folder named DataFolder.
    if (!local.DirectoryExists("DataFolder"))
        local.CreateDirectory("DataFolder");

    // Create a new file named DataFile.txt.
    using (var isoFileStream = 
            new System.IO.IsolatedStorage.IsolatedStorageFileStream(
                "DataFolder\\DataFile.txt", 
                System.IO.FileMode.OpenOrCreate,
                    local))
    {
        // Write the data from the textbox.
        using (var isoFileWriter = new System.IO.StreamWriter(isoFileStream))
        {
            isoFileWriter.WriteLine(this.textBox1.Text);
        }
    }

    // Update UI.
    this.btnWrite.IsEnabled = false;
    this.btnRead.IsEnabled = true;
}

            private void btnRead_Click(object sender, RoutedEventArgs e)
{
  
   // Obtain a virtual store for the application.
    System.IO.IsolatedStorage.IsolatedStorageFile local =
        System.IO.IsolatedStorage.IsolatedStorageFile.GetUserStoreForApplication();

    // Specify the file path and options.
    using (var isoFileStream =
            new System.IO.IsolatedStorage.IsolatedStorageFileStream
                ("DataFolder\\DataFile.txt", System.IO.FileMode.Open, local))
    {
        // Read the data.
        using (var isoFileReader = new System.IO.StreamReader(isoFileStream))
        {
            this.textBlock1.Text = isoFileReader.ReadLine();
        }
    }
    // Update UI.
    this.btnWrite.IsEnabled = true;
    this.btnRead.IsEnabled = false;
  

  
}

请尽快帮助。

Please Help as soon you can.

推荐答案

上面的代码很好，您需要添加名称空间使用System.IO;

above code is fine you need to add a namespace "using System.IO;"

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