如何读取其地址存储在变量中的文件。 [英] How to read a file whose address is stored in a variable.

问题描述

  string  text = System.IO.File.ReadAllText（ @  D：\Selected Instances \Insertion graphs\1-FullIns_3.col）; 

如果我们在FileName变量上存储文件路径，这是读取文件的方法。



我尝试过：

  string  text = System.IO.File.ReadAllText（@FileName） ; 

不工作

解决方案

我想的是

  string  filename =  @  D：\Selected Instances ...; 
  if （！File.Exists（filename））
 {
 Console.WriteLine（ 文件{0}不存在，filename）; 
 Environment.Exit（-1）; 
} 
 
  string  text = File.ReadAllText（filename）; 
 
  //  用文字做点什么 

你有没有试过

  string  fileName =  @  D：\Selected Instances \Insertion graphs\1-FullIns_3.col; 
  string  text = System.IO.File.ReadAllText（fileName）; 

@字符不能与变量一起使用，只能使用文字字符串。

参见字符串类（系统） [ ^ ]

Quote：

请注意，在C＃中，因为反斜杠（\）是转义字符，所以必须转义字符串中的字面反斜杠或整个字符串必须为@ -quoted。

string text = System.IO.File.ReadAllText(@"D:\Selected Instances\Insertion graphs\1-FullIns_3.col");

this is the way to read a file what if we have file path stored on FileName variable.

What I have tried:

string text = System.IO.File.ReadAllText(@FileName);

not working

解决方案

I'd think about

string filename = @"D:\Selected Instances...";
if (!File.Exists(filename))
{
  Console.WriteLine("File {0} Doesnt Exist", filename);
  Environment.Exit(-1);
}

string text = File.ReadAllText(filename);

// Do something with text 

Have you tried

string fileName = @"D:\Selected Instances\Insertion graphs\1-FullIns_3.col";
string text = System.IO.File.ReadAllText(fileName);

The @ character cannot be used with a variable, only literal strings.
See String Class (System)[^]

Quote:

Note that in C#, because the backslash (\) is an escape character, literal backslashes in a string must be escaped or the entire string must be @-quoted.

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