麻烦与IsolatedStorageFileStream

Question

每当我运行此代码：

IsolatedStorageFile fileStorage = IsolatedStorageFile.GetUserStoreForApplication(); 
StreamWriter Writer = new StreamWriter(new IsolatedStorageFileStream("TestFile.txt", FileMode.OpenOrCreate, fileStorage)); 
Writer.WriteLine(email1.Text + "," + email2.Text + "," + email3.Text + "," + email4.Text); 
Writer.Close(); 

我得到这个错误：

An exception of type 'System.IO.IsolatedStorage.IsolatedStorageException' occurred in mscorlib.ni.dll but was not handled in user code

我使用模拟器但是这不应该是一个问题。我已经包括了线

Using System.IO.IsolatedStorage; 

Answer 1

非常样的问题，你在使用IsolatedStorage是

System.IO.IsolatedStorage.IsolatedStorageException

那是因为你没有实际关闭存储使用it.This将引发异常后在安全方面也。将代码重写为：

using (var storage = IsolatedStorageFile.GetUserStoreForApplication()) 
     { 
      using (var file = storage.OpenFile("TestFile.txt", System.IO.FileMode.OpenOrCreate)) 
      { 
       using (System.IO.StreamWriter writer = new System.IO.StreamWriter()) 
       { 
        writer.WriteLine(email1.Text + "," + email2.Text + "," + email3.Text + "," + email4.Text); 
       } 
      } 
     } 

实际使用的确实是使用将会调用使其可重用的dispose方法。存储，文件流，Streamwriter都配置了实际使用“使用”的方法。这通常不会引发维护资源的异常，但对于文件名的参数异常仍然会产生问题。

Try...catch must be used always while handling files and input.

编辑 守则如何阅读：

string dataToRead = string.Empty; 
using (var storage = IsolatedStorageFile.GetUserStoreForApplication()) 
{ 
    using (var file = storage.OpenFile("TestFile.txt", System.IO.FileMode.Open)) 
    { 
     using (var reader = new System.IO.StreamReader(file)) 
     { 
       dataToRead = reader.ReadToEnd(); 
     } 
    } 
}