“cannot access the ClassView information file.”的解决办法

本文详细介绍了MSVC项目中各种文件的作用,包括工程文件(.dsp)、工作区文件(.dsw)、ClassWizard信息文件(.clw)等,并解释了它们在项目构建过程中的重要性和如何处理这些文件的问题。

1.关闭工程
2.删除工程下.clw .ncb 文件及/debug目录,
3.重建工程build all

文件作用:

.dsp 工程文件,文本格式,不可丢失或损坏

.dsw 工作区文件,丢失或损坏时,可点击.dsp文件打开工程,.dsw文件自动重建

.clw ClassWizard信息文件,ini格式,ClassWizard出问题时可删除它再重建

.map 映像信息文件,编制DLL写.def文件时,若不知道函数导出顺序,可在
   Prject / Settings / Link 页中选中“Generate mapfile”,重新build,
   用记事本或其它类似程序打开生成的.map文件,里面可看到函数导出表

.i 在命令行环境下输入:cl ***.cpp /P (注意后面的参数P大小写敏感),
   程序文件夹中会生成.i文件,用记事本或其它类似程序打开,可看到.cpp
   文件经预处理后的结果

.ncb 无编译浏览文件,当自动完成功能(自动显示成员变量列表)出问题时,
   可删除它,build 后自动重建。


其它:
.aps 资源辅助文件,二进制格式
.opt 开发环境参数(如工具条位置)文件
.plg 编译信息(如error和warning信息)文件,html格式

.pch 预编译文件,可加快编译速度,但改文件非常大
.pdb 记录程序相关的数据和调试信息
.exp dll信息文件,编译dll时才会生成
.bsc 用于浏览项目信息,可在
   Prject / Settings / Link 页中勾掉“Generate Browse Info File”,
   禁止生成.bsc文件,以加快编译速度。但若使用Source Browser的话
   就必须有这个文件

In this task, you will design and implement a user-driven vocabulary management system that supports interaction from different types of users (e.g., readers and admins). This task simulates a real-world collaborative environment, where access control and data integrity are critical. 🧩 Task Objective You are required to implement the following two classes: Role: defines the role of a user, including their name, access level, and identity information. RoleBasedVocabSys: manages user login, menu display, command execution, and interaction with the TextProcessor object. The program should simulate a terminal-like experience for different types of users, controlling what they can see and what actions they can perform. 👥 User Roles The system supports two user roles: Reader: Can log in and view the vocabulary. Can view the top 10 and bottom 10 most frequent words. Cannot update or modify any part of the vocabulary. check the examples below for reference. Admin: Has all the permissions of the reader. Can update the vocabulary by adding new files or removing existing ones. Has full access to the vocabulary update methods from TextProcessor. User credentials and access roles are provided as the varaiable users_info from the util.py module. in scaffold. 📋 Task Requirements You must: Implement the Role class, which should: Store and return the user’s username, display name, and access level (e.g., "reader", "admin"). Provide getter methods: get_user_name(), get_access(), get_name(). Implement the RoleBasedVocabSys class, which should: Handle login and logout. Display different menus depending on whether a user is logged in and their access level. Call TextProcessor functions (from Task 7) to manage the vocabulary. Enforce role-based access control (e.g., only admins can update vocabularies). Use the provided attributes and method names in the scaffold. Do not rename or remove any predefined code blocks. Implement menu-based navigation where users can choose options via standard input: Exit the system. Login or Logout. View the top 10 or bottom 10 frequent words. Update vocabulary by adding/removing files (admin only). You may write additional helper functions or methods as needed. 🧠 Additional Notes The vocabulary is loaded and managed via the TextProcessor object created in the constructor. The files to be added/removed are fixed as data/for_admin/excluded.csv data/add.csv and data/delete.csv for this exercise, but you may generalize it in future tasks. All user input should be validated using verify_user_choice. The system should loop until the user chooses to exit. Examples Example 1a: interface when starting the program Welcome to the Mark system v0.0! Please Login: 1.Exit 2.Login Enter your choice: Example 1b: unlimited attemps for invalid users inputs Welcome to the Mark system v0.0! Please Login: 1.Exit 2.Login Enter your choice: ewfwef Enter your choice: edf Enter your choice: 3 Enter your choice: 4 ... Enter your choice: Example 2a: correct login credential for reader Welcome to the Mark system v0.0! Please Login: 1.Exit 2.Login Please key your account name: Jueqing Please key your password: jueqing123 Welcome Jueqing Lu Please choose one option below: 1.Exit 2.Logout/Re-Login 3.Show top 10 frequency vocabularies 4.Show last 10 frequency vocabularies Enter your choice: Example 2b: correct login credential for admin Welcome to the Mark system v0.0! Please Login: 1.Exit 2.Login Please key your account name: Trang Please key your password: trang123 Welcome Trang Vu Please choose one option below: 1.Exit 2.Logout/Re-Login 3.Show top 10 frequency vocabularies 4.Show last 10 frequency vocabularies 5.Updating Vobulary for adding 6.Updating Vobulary for excluding Enter your choice:
最新发布
09-24
当在C#读取Excel文件时出现 “The process cannot access the file 'xxx.xlsx' because it is being used by another process” 错误,意味着该Excel文件正在被其他进程占用。以下是一些可能的解决办法: #### 关闭正在使用该文件的程序 检查是否有其他程序正在打开该Excel文件,如Microsoft Excel软件。如果有,关闭这些程序后再尝试读取文件。 #### 以只读模式打开文件 在C#代码中,可以使用`FileShare.ReadWrite`参数以只读模式打开文件,这样即使文件被其他程序占用,也可以进行读取操作。以下是使用`FileStream`和`ExcelDataReader`的示例代码: ```csharp using ExcelDataReader; using System; using System.IO; class Program { static void Main() { string filePath = "xxx.xlsx"; try { using (var stream = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite)) { using (var reader = ExcelReaderFactory.CreateReader(stream)) { // 读取Excel文件的代码 while (reader.Read()) { // 处理每一行数据 } } } } catch (Exception ex) { Console.WriteLine($"读取文件时出错: {ex.Message}"); } } } ``` #### 复制文件并读取副本 如果无法关闭正在使用该文件的程序,也可以将文件复制到一个临时位置,然后读取该临时文件。以下是示例代码: ```csharp using System; using System.IO; class Program { static void Main() { string sourceFilePath = "xxx.xlsx"; string tempFilePath = Path.GetTempFileName(); try { File.Copy(sourceFilePath, tempFilePath, true); // 在这里使用tempFilePath读取Excel文件 // 读取完成后删除临时文件 File.Delete(tempFilePath); } catch (Exception ex) { Console.WriteLine($"操作文件时出错: {ex.Message}"); } } } ```
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