如何在Metro App中使用StreamReader在Metro App中编写.txt文件？

Question

我在Windows 8 metro应用程序中创建StreamReader对象时遇到了问题。我试图让它读取我本地目录中的文本文件，但它一直向我显示这个错误。任何人都可以为这个或其他解决方案提供解决方案吗？

我正在使用MS Visual Studio Ultimate 2012，metro应用程序。

代码：

 int level = 1; 

     var fileName = string.Format(@"Mazes\level{0}.txt", level); 

     using (var sr = new StreamReader(fileName)) 
     { 
      var l = 0; 
      while (!sr.EndOfStream) 
      { 
       string line = sr.ReadLine(); 

       for (var c = 0; c < line.Length; c++) 
       { 
        mazeValues[c, l] = line[c]; 

        if (mazeValues[c, l] == '1') 
        { 
         var glass = new Glass(); 
         glass.SetValue(Grid.ColumnProperty, c); 
         glass.SetValue(Grid.RowProperty, l); 
         grdMaze.Children.Add(glass); 
         mazeGlasses[c, l] = glass; 
        } 
       } 
       l++; 
      } 
     } 

错误显示：

最好重载方法为 'System.IO.StreamReader.StreamReader（System.IO.Stream）' 具有一些 无效arguements。

Answer 1

Windows.Storage.StorageFile.GetFileFromApplicationUriAsync和Windows.Storage.FileIO.ReadLinesAsync可用于此目的。

using System; 
using Windows.Storage; 
async void test2() 
{ 

    var fileName = string.Format(@"ms-appx:///Mazes/level{0}.txt", level); 
    try 
    { 
     var file = await StorageFile.GetFileFromApplicationUriAsync(new Uri("ms-appx:///assets/textfile1.txt")); 
     var lines = await FileIO.ReadLinesAsync(file); 
     foreach (var line in lines) 
     { 
      // code to process each line here 
     } 
    } 
    catch (Exception e) 
    { 
     // handle exceptions 
    } 

Answer 2

WebClient client = new WebClient();  
System.IO.Stream stream = client.OpenRead(path_of_text _file); 
    System.IO.StreamReader str = new StreamReader(stream); 
    string Text = str.ReadLine(); 

    while (!Text.EndOfStream) 
     { 
      string line = Text.ReadLine(); 

      for (var c = 0; c < line.Length; c++) 
      { 
       mazeValues[c, l] = line[c]; 

       if (mazeValues[c, l] == '1') 
       { 
        var glass = new Glass(); 
        glass.SetValue(Grid.ColumnProperty, c); 
        glass.SetValue(Grid.RowProperty, l); 
        grdMaze.Children.Add(glass); 
        mazeGlasses[c, l] = glass; 
       } 
      } 
      l++; 
     }