Streamreader不会在文本文件中读取数据C＃ [英] Streamreader doesn't read data in text file C#

问题描述

我有两个类allmethods.cs和caller.cs

我在allmethods.cs类中有两个方法WritingMethod和ReadingMethod

程序应该从文本文件中读取和读取。当我调用WritingMethod时，它平滑地写入，但是当我调用ReadingMethod时，它显示为null，就好像文本文件中没有数据一样。

这是我的代码：

  public class allmethods 
 {
 private static string Name; 
 private static int ID; 
 private static int Age; 
 private static string Email; 
 private static string output; 
 
 public static void WriteMethod（）
 {
 int count = 0; 
 while（count< 2）
 {
 Console.Write（输入您的姓名：）; 
 Name = Console.ReadLine（）; 
 
 Console.Write（输入您的ID：）; 
 ID = int.Parse（Console.ReadLine（））; 
 
 Console.Write（输入您的年龄：）; 
 Age = int.Parse（Console.ReadLine（））; 
 
 Console.Write（输入您的电子邮件：）; 
 Email = Console.ReadLine（）; 
 
 
 
 StreamWriter Sw = new StreamWriter（fileone.txt，true）; 
 string output = string.Format（谢谢注册！您提交的信息是：+ Environment.NewLine +名称：{0}
 + Environment.NewLine +ID：{1} + Environment.NewLine +年龄：{2}+ Environment.NewLine +电子邮件：{3}，姓名，ID，年龄，电子邮件）; 
 Console.WriteLine（output）; 
 Sw.WriteLine（output + Environment.NewLine）; 
 Console.ReadLine（）; 
 
 Sw.Close（）; 
 count ++; 
} 
 
} 
 
 public static void ReadingMethod（）
 {
 
 FileStream fsr = new FileStream（fileone。 txt，FileMode.Open，FileAccess.Read）; 
 StreamReader Sr = new StreamReader（fsr）; 
 string line = Sr.ReadLine（）; 
 Console.WriteLine（ -  Reading the File--+ Environment.NewLine + output + Environment.NewLine）; 
 Console.ReadLine（）; 
 
 Sr.Close（）; 
 fsr.Close（）; 
} 
} 
  

非常感谢。等待您的答案。

解决方案

看来您还没有设置变量 $ c>。您已设置行变量。

  public static void ReadingMethod b $ b {
 
 FileStream fsr = new FileStream（fileone.txt，FileMode.Open，FileAccess.Read）; 
 StreamReader Sr = new StreamReader（fsr）; 
 string line = Sr.ReadToEnd（）; 
 Console.WriteLine（ -  Reading the File--+ Environment.NewLine + line + Environment.NewLine）; 
 Console.ReadLine（）; 
 
 Sr.Close（）; 
 fsr.Close（）; 
} 
  

我修改的内容从 code>到行。

希望它有帮助。

I have two classes "allmethods.cs" and "caller.cs"

I have two methods in the "allmethods.cs" class which are "WritingMethod" and "ReadingMethod"

The program should write and read from a text file. It writes smoothly when I call the "WritingMethod" but When I call the "ReadingMethod" it shows null as if there is no data in the text file.

I can't identify the problem in my code, I'd be glad if anyone help me identify the problem.

Here is my code:

public class allmethods
{
    private static string Name;
    private static int ID;
    private static int Age;
    private static string Email;
    private static string output;

    public static void WritingMethod()
        {
             int count = 0;
             while (count < 2)
            {
            Console.Write(" Enter your Name: ");
            Name = Console.ReadLine();

            Console.Write(" Enter your ID: ");
            ID = int.Parse(Console.ReadLine());

            Console.Write(" Enter your Age: ");
            Age = int.Parse(Console.ReadLine());

            Console.Write(" Enter your E-mail: ");
            Email = Console.ReadLine();



        StreamWriter Sw = new StreamWriter("fileone.txt", true);
        string output = string.Format("Thank you for registration! Your Submitted information are:" + Environment.NewLine + "Name: {0}"
        + Environment.NewLine + "ID: {1}" + Environment.NewLine + "Age: {2}" + Environment.NewLine + "E-mail: {3}", Name, ID, Age, Email);
        Console.WriteLine(output);      
        Sw.WriteLine(output + Environment.NewLine);
        Console.ReadLine();

        Sw.Close();
        count++;
        }

    }

    public static void ReadingMethod()
    {

        FileStream fsr = new FileStream("fileone.txt", FileMode.Open, FileAccess.Read);     
        StreamReader Sr = new StreamReader(fsr);       
        string line = Sr.ReadLine();
        Console.WriteLine("--Reading The File--" + Environment.NewLine + output + Environment.NewLine);
        Console.ReadLine();

        Sr.Close();
        fsr.Close();
    }
}

Thank you very much. Waiting for your answers.

解决方案

It seems that you have not set the variable output. You have set line variable.

    public static void ReadingMethod()
    {

        FileStream fsr = new FileStream("fileone.txt", FileMode.Open, FileAccess.Read);     
        StreamReader Sr = new StreamReader(fsr);       
        string line = Sr.ReadToEnd();
        Console.WriteLine("--Reading The File--" + Environment.NewLine + line + Environment.NewLine);
        Console.ReadLine();

        Sr.Close();
        fsr.Close();
    }

What I have modified is changed from output to line.

Hope it helps.

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