.NET 使用 CsvHelper 快速读取和写入 CSV 文件

前言

在日常开发中使用CSV文件进行数据导入和导出、数据交换是非常常见的需求,今天我们来讲讲在 .NET 中如何使用CsvHelper这个开源库快速实现CSV文件读取和写入。

CsvHelper类库介绍

CsvHelper是一个.NET开源、快速、灵活、高度可配置、易于使用的用于读取和写入CSV文件的类库。

CsvHelper类库功能特点

什么是 .csv 文件?

.csv 文件是一种用于存储表格数据的文本文件,CSV 是 "Comma-Separated Values" 的缩写,意思是 "逗号分隔值"。CSV 文件是一个存储表格和电子表格信息的纯文本文件,其内容通常是一个文本、数字或日期的表格。CSV 文件可以使用以表格形式存储数据的程序轻松导入和导出。

创建控制台应用

创建一个名为:CsvHelperExercise的.NET 8控制台应用。

安装CsvHelper类库

NuGet包管理器中搜索:CsvHelper,点击安装!

定义CSV文件读取和写入的对象

csharp 复制代码
    public class StudentInfo
    {
        /// <summary>
        /// 学生学号
        /// </summary>
        public int ID { get; set; }

        /// <summary>
        /// 学生姓名
        /// </summary>
        public string Name { get; set; }

        /// <summary>
        /// 学生年龄
        /// </summary>
        public int Age { get; set; }

        /// <summary>
        /// 班级
        /// </summary>
        public string Class { get; set; }

        /// <summary>
        /// 性别
        /// </summary>
        public string Gender { get; set; }

        /// <summary>
        /// 住址
        /// </summary>
        public string Address { get; set; }
    }

写入CSV文件数据

ini 复制代码
        static void Main(string[] args)
        {
            var students = new List<StudentInfo>
            {
                new StudentInfo { ID = 1, Name = "张三", Age = 20, Class = "终极一班", Gender = "男", Address = "北京市东城区" },
                new StudentInfo { ID = 2, Name = "李四", Age = 21, Class = "终极一班", Gender = "女", Address = "上海市黄浦区" },
                new StudentInfo { ID = 3, Name = "王五", Age = 22, Class = "终极一班", Gender = "男", Address = "广州市越秀区" },
                new StudentInfo { ID = 4, Name = "赵六", Age = 20, Class = "终极二班", Gender = "女", Address = "深圳市福田区" },
                new StudentInfo { ID = 5, Name = "孙七", Age = 23, Class = "终极二班", Gender = "男", Address = "杭州市西湖区" },
                new StudentInfo { ID = 6, Name = "周八", Age = 24, Class = "终极二班", Gender = "女", Address = "南京市玄武区" },
                new StudentInfo { ID = 7, Name = "吴九", Age = 22, Class = "终极二班", Gender = "男", Address = "成都市锦江区" },
                new StudentInfo { ID = 8, Name = "小袁", Age = 21, Class = "终极三班", Gender = "女", Address = "重庆市渝中区" },
                new StudentInfo { ID = 9, Name = "大姚", Age = 20, Class = "终极三班", Gender = "男", Address = "武汉市武昌区" },
                new StudentInfo { ID = 10, Name = "追逐时光者", Age = 23, Class = "终极三班", Gender = "女", Address = "长沙市天心区" },
                new StudentInfo { ID = 11, Name = "陈十一", Age = 22, Class = "终极四班", Gender = "男", Address = "天津市和平区" },
                new StudentInfo { ID = 12, Name = "黄十二", Age = 21, Class = "终极四班", Gender = "女", Address = "西安市雁塔区" },
                new StudentInfo { ID = 13, Name = "刘十三", Age = 24, Class = "终极四班", Gender = "男", Address = "苏州市姑苏区" },
                new StudentInfo { ID = 14, Name = "郑十四", Age = 20, Class = "终极四班", Gender = "女", Address = "东莞市莞城区" },
                new StudentInfo { ID = 15, Name = "冯十五", Age = 23, Class = "终极五班", Gender = "男", Address = "佛山市禅城区" },
                new StudentInfo { ID = 16, Name = "褚十六", Age = 25, Class = "终极五班", Gender = "女", Address = "厦门市思明区" },
                new StudentInfo { ID = 17, Name = "卫十七", Age = 22, Class = "终极五班", Gender = "男", Address = "青岛市市南区" },
                new StudentInfo { ID = 18, Name = "蒋十八", Age = 21, Class = "终极五班", Gender = "女", Address = "大连市中山区" },
                new StudentInfo { ID = 19, Name = "沈十九", Age = 24, Class = "终极六班", Gender = "男", Address = "宁波市海曙区" },
                new StudentInfo { ID = 20, Name = "韩二十", Age = 20, Class = "终极六班", Gender = "女", Address = "温州市鹿城区" }
            };

            //写入CSV文件数据
            using var writer = new StreamWriter(@".\StudentInfoFile.csv");
            using var csvWriter = new CsvWriter(writer, CultureInfo.InvariantCulture);
            csvWriter.WriteRecords(students);
        }

读取CSV文件数据

快速读取上面写入到StudentInfoFile.csv中的数据。

csharp 复制代码
        static void Main(string[] args)
        {
            //读取CSV文件数据
            using var reader = new StreamReader(@".\StudentInfoFile.csv");
            using var csvReader = new CsvReader(reader, CultureInfo.InvariantCulture);
            var getStudentInfos = csvReader.GetRecords<StudentInfo>().ToList();
        }

项目源码地址

更多项目实用功能和特性欢迎前往项目开源地址查看👀,别忘了给项目一个Star支持💖。

优秀项目和框架精选

该项目已收录到C#/.NET/.NET Core优秀项目和框架精选中,关注优秀项目和框架精选能让你及时了解C#、.NET和.NET Core领域的最新动态和最佳实践,提高开发工作效率和质量。坑已挖,欢迎大家踊跃提交PR推荐或自荐(让优秀的项目和框架不被埋没🤞)。

相关推荐
catchadmin34 分钟前
PHP 快速集成 ChatGPT 用 AI 让你的应用更聪明
人工智能·后端·chatgpt·php
callJJ5 小时前
从 0 开始理解 Spring 的核心思想 —— IoC 和 DI(2)
java·开发语言·后端·spring·ioc·di
你的人类朋友7 小时前
JWT的组成
后端
北风朝向7 小时前
Spring Boot参数校验8大坑与生产级避坑指南
java·spring boot·后端·spring
canonical_entropy8 小时前
一份关于“可逆计算”的认知解码:从技术细节到哲学思辨的完整指南
后端·低代码·deepseek
趙卋傑8 小时前
项目发布部署
linux·服务器·后端·web
数据知道9 小时前
Go基础:Go语言能用到的常用时间处理
开发语言·后端·golang·go语言
不爱编程的小九九10 小时前
小九源码-springboot048-基于spring boot心理健康服务系统
java·spring boot·后端
龙茶清欢10 小时前
Spring Boot 应用启动组件加载顺序与优先级详解
java·spring boot·后端·微服务
2351611 小时前
【LeetCode】3. 无重复字符的最长子串
java·后端·算法·leetcode·职场和发展