在phone7中打开一个项目文件 [英] Open a project file in phone7

问题描述

你好，我在 VisualStudio 中有一个项目，其中包含根节点下方的文件夹xmlfiles".该文件夹包含我尝试打开的文件mensen.xml"...

Howdy, I have a project in VisualStudio which contains a folder 'xmlfiles' below the root node. This folder contains a file 'mensen.xml' which I try to open ...

但是，当我尝试打开该文件时，调试器会介入并引发异常.

However when I try to open that very file the debugger steps in and throws an exception.

我试过了<代码>if(File.Exists(@"/xmlfiles/mensen.xml") ){布尔存在 = 真；}还有:

I tried it with if(File.Exists(@"/xmlfiles/mensen.xml") ) { bool exists = true; } as well as:

        FileStream fs = File.Open("/xmlfiles/mensen.xml", FileMode.Open);            
        TextReader textReader = new StreamReader(fs);
        kantinen = (meineKantinen)deserializer.Deserialize(textReader);
        textReader.Close();

没有任何效果:(.如何在 Phone7 Emulator 中打开本地文件?

Nothin is working :(. How can I open a local file in the Phone7 Emulator?

推荐答案

如果您只是打开它来阅读它，那么您可以执行以下操作(假设您已将文件的 Build Action 设置为 Resource):

If you are just opening it to read it then you can do the following (Assuming you have set the Build Action of the file to Resource):

System.IO.Stream myFileStream = Application.GetResourceStream(new Uri(@"/YOURASSEMBLY;component/xmlfiles/mensen.xml",UriKind.Relative)).Stream;

如果您尝试读/写此文件，则需要将其复制到独立存储.(一定要添加using System.IO.IsolatedStorage)

If you are attempting to read/write this file then you will need to copy it to Isolated Storage. (Be sure to add using System.IO.IsolatedStorage)

您可以使用以下方法:

 private void CopyFromContentToStorage(String fileName)
 {
   IsolatedStorageFile store = IsolatedStorageFile.GetUserStoreForApplication();
   System.IO.Stream src = Application.GetResourceStream(new Uri(@"/YOURASSEMBLY;component/" + fileName,UriKind.Relative)).Stream;
   IsolatedStorageFileStream dest = new IsolatedStorageFileStream(fileName, System.IO.FileMode.OpenOrCreate, System.IO.FileAccess.Write, store);
   src.Position = 0;
   CopyStream(src, dest);
   dest.Flush();
   dest.Close();
   src.Close();
   dest.Dispose();
 }

 private static void CopyStream(System.IO.Stream input, IsolatedStorageFileStream output)
 {
   byte[] buffer = new byte[32768];
   long TempPos = input.Position;
   int readCount;
   do
   {
     readCount = input.Read(buffer, 0, buffer.Length);
     if (readCount > 0) { output.Write(buffer, 0, readCount); }
   } while (readCount > 0);
   input.Position = TempPos;
 }

在这两种情况下，请确保文件设置为 Resource 并且您将 YOURASSEMBLY 部件替换为您的程序集名称.

In both cases, be sure the file is set to Resource and you replace the YOURASSEMBLY part with the name of your assembly.

使用上述方法，要访问您的文件，只需执行以下操作:

Using the above methods, to access your file just do this:

IsolatedStorageFile store = IsolatedStorageFile.GetUserStoreForApplication();
if (!store.FileExists(fileName))
{
  CopyFromContentToStorage(fileName);
}
store.OpenFile(fileName, System.IO.FileMode.Append);

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