将IsolatedStorageFileStream从Windows Phone 8.1转换为Windows 8.1 [英] Convert IsolatedStorageFileStream from Windows phone 8.1 to Windows 8.1

问题描述

我在windows phone应用程序中编写了这段代码，用于从xml文件读取和写入数据，并且工作正常。

所以我想在Windows 8.1应用程序中使用它但是它不起作用，我怎么样将其转换为与Windows 8.1兼容

 public void Read（string strXMLFile）
 {
 IsolatedStorageFile isfData = IsolatedStorageFile .GetUserStoreForApplication（）; 
 XDocument doc = null; 
 IsolatedStorageFileStream isfStream = null; 
 if（isfData.FileExists（strXMLFile））
 {
 isfStream = new IsolatedStorageFileStream（strXMLFile，FileMode.Open，isfData）; 
 doc = XDocument.Load（isfStream）; 
 isfStream.Close（）; 
} 
 else 
 {
 doc = XDocument.Load（strXMLFile）; 
 isfStream = new IsolatedStorageFileStream（strXMLFile，FileMode.CreateNew，isfData）; 
 doc.Save（isfStream）; 
 isfStream.Close（）; 
} 
 
 var vData =来自doc.Descendants（Row）中的s选择新的ColData（s）; 
} 
 
 
 public void Write（string strXMLFile）
 {
 XElement xml = new XElement（Tabel，
 from p in这个
选择p.Information）; 
 
 IsolatedStorageFileStream isfStream = new IsolatedStorageFileStream（strXMLFile，FileMode.Open，IsolatedStorageFile.GetUserStoreForApplication（））; 
 xml.Save（isfStream）; 
 isfStream.Close（）; 
 
} 
 

解决方案

检查以下方法，如果你在windows中有设置开发环境8 PC，你最好逐行调试，检查出了什么问题。

写一个文件：

  public   async 任务WriteFile（ string  fileName， string  text）
 {
 IStorageFolder applicationFolder = ApplicationData.Current.LocalFolder; 
 
 IStorageFile storageFile =  await  applicationFolder.CreateFileAsync（fileName，CreationCollisionOption.ReplaceExisting）; 
 
 使用（Stream stream =  await  storageFile.OpenStreamForWriteAsync（））
 {
  byte  [] content = Encoding.UTF8.GetBytes（text）; 
  await  stream.WriteAsync（content， 0 ，content.Length）; 
} 
} 

读取文件：

  public   async 任务< string> ReadFile（ string  fileName）
 {
  string  text; 
 IStorageFolder applicationFolder = ApplicationData.Current.LocalFolder; 
 
 IStorageFile storageFile =  await  applicationFolder.GetFileAsync（fileName）; 
 
 IRandomAccessStream accessStream =  await  storageFile.OpenReadAsync（）; 
 
 使用（Stream stream = accessStream.AsStreamForRead（（ int ）accessStream。大小））
 {
  byte  [] content =  new  字节 [stream.Length]; 
  await  stream.ReadAsync（content， 0 ，（ int ）stream.Length）; 
 
 text = Encoding.UTF8.GetString（content， 0 ，content.Length）; 
} 
 
  return  text; 
} < /   string  >  

参考： Windows Phone 8共享核心与Windows 8 - 文件IO [ ^ ]

I wrote this code in windows phone application to read and write data from xml file and it is work fine.
so i want to use it at windows 8.1 application but it's not work, how i convert it to be compatible with windows 8.1

public void Read(string strXMLFile)
       {
           IsolatedStorageFile isfData = IsolatedStorageFile.GetUserStoreForApplication();
           XDocument doc = null;
           IsolatedStorageFileStream isfStream = null;
           if (isfData.FileExists(strXMLFile))
           {
               isfStream = new IsolatedStorageFileStream(strXMLFile, FileMode.Open, isfData);
               doc = XDocument.Load(isfStream);
               isfStream.Close();
           }
           else
           {
               doc = XDocument.Load(strXMLFile);
               isfStream = new IsolatedStorageFileStream(strXMLFile, FileMode.CreateNew, isfData);
               doc.Save(isfStream);
               isfStream.Close();
           }

           var vData = from s in doc.Descendants("Row") select new ColData(s);
       }


       public void Write(string strXMLFile)
       {
           XElement xml = new XElement("Tabel",
                           from p in this
                           select p.Information);

           IsolatedStorageFileStream isfStream = new IsolatedStorageFileStream(strXMLFile, FileMode.Open, IsolatedStorageFile.GetUserStoreForApplication());
           xml.Save(isfStream);
           isfStream.Close();

       }

解决方案

check with below methods, if you have setup development environment in windows 8 PC, you better debug line by line and check what is going wrong.
To write a file:

public async Task WriteFile(string fileName, string text)
{
    IStorageFolder applicationFolder = ApplicationData.Current.LocalFolder;

    IStorageFile storageFile = await applicationFolder.CreateFileAsync(fileName, CreationCollisionOption.ReplaceExisting);

    using (Stream stream = await storageFile.OpenStreamForWriteAsync())
    {
        byte[] content = Encoding.UTF8.GetBytes(text);
        await stream.WriteAsync(content, 0, content.Length);
    }
}

To read a file:

public async Task<string> ReadFile(string fileName)
{
    string text;
    IStorageFolder applicationFolder = ApplicationData.Current.LocalFolder;

    IStorageFile storageFile = await applicationFolder.GetFileAsync(fileName);

    IRandomAccessStream accessStream = await storageFile.OpenReadAsync();

    using (Stream stream = accessStream.AsStreamForRead((int)accessStream.Size))
    {
        byte[] content = new byte[stream.Length];
        await stream.ReadAsync(content, 0, (int) stream.Length);

        text = Encoding.UTF8.GetString(content, 0, content.Length);
    }

    return text;
}</string>

Ref : Windows Phone 8 Shared Core With Windows 8 – File IO[^]

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