该进程无法访问该文件，因为它正被另一个进程 Streamwriter 使用

Question

我收到一个错误，即我用于创建和保存我的字典的文本文件正被另一个进程使用，我使用进程资源管理器没有任何结果可以使用我的文件。以下是我的代码和引发此错误的代码。

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;


namespace meade_9_10
{
    public partial class Form1 : Form
    {

        private Dictionary<string, string> names = new Dictionary<string, string>()
        {
            
        };

        public Form1()
        {
            //Make sure Form1 is loaded and ran on program open
            InitializeComponent();
            this.Load += Form1_Load;
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            //Grab myfile.txt and convert to array
            StreamReader sr = new StreamReader("myfile.txt");
            string line;

            while ((line = sr.ReadLine()) != null)
            {
                string[] arr = line.Split(',');
                int i = 0;
                //Add array objects to names dictionary
                while (i < arr.Length)
                {
                    names[arr[i]] = arr[i + 1];
                    i += 2;
                }
            }
        }

        private void btnAdd_Click(object sender, EventArgs e)
        {   
            //declare variables
            string nameAdd;
            string emailAdd;
            //Put user input into variable
            nameAdd = txtNameAdd.Text;
            emailAdd = txtEmailAdd.Text;
            //Declare new dictionary key pair as user input
            names[emailAdd] = nameAdd;
            //clear the textbox controls
            txtNameAdd.Text = "";
            txtEmailAdd.Text = "";
        }

        private void btnDelete_Click(object sender, EventArgs e)
        {   
            string emailDel;
            emailDel = txtEmailDel.Text;
            //Remove key pair that is inputted by user
            names.Remove(emailDel);   
        }

        private void btnChange_Click(object sender, EventArgs e)
        {
            //Declare variables
            string emailDel;
            string nameAdd;
            string emailAdd;
            //Assign values to variables
            emailDel = txtEmailChange.Text;
            nameAdd = txtNameNew.Text;
            emailAdd = txtEmailNew.Text;
            //Delete the user inputted email to change
            names.Remove(emailDel);
            //Add the new key pair values to dictionary
            names.Add(emailAdd, nameAdd);
        }

        private void btnLookUp_Click(object sender, EventArgs e)
        {  
            //Declare variable
            string email = txtEmail.Text;
            //If statement to check if dictionary contains key value
            if (names.ContainsKey(email))
            {
                outputName.Text = names[email];
                outputEmail.Text = email;
            }   
        }

        private void btnExit_Click(object sender, EventArgs e)
        {
            //writes the names dictioanry to array inside text file
            File.WriteAllLines("myfile.txt",
            names.Select(x => x.Key + "," + x.Value ).ToArray());
            
            //Closes the program
            this.Close();
        }
    }
}

我的代码部分给了我错误

System.IO.IOException: '进程无法访问文件'C:\Users\Adrian\Desktop\ALL SCHOOL FILES\Fall 2021\C#\meade_9_10\bin\Debug\myfile.txt'，因为它正在被使用由另一个进程。'

是

            names.Select(x => x.Key + "," + x.Value ).ToArray());

我只是不知道是什么进程正在使用我的文本文件破坏了这个程序，它之前工作过，除了删除函数之间的冗余空白之外，我没有做任何更改。

Answer 1

尝试使用 StreamReader.Close() 方法在你最里面的while 循环之后：

关闭 StreamReader 对象和底层流，并释放与阅读器关联的所有系统资源。

或者，您可以使用using 语句：

提供方便的语法，确保正确使用 IDisposable 对象。