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MiniExcel简介
简单、高效避免OOM的.NET处理Excel查、写、填充数据工具。
目前主流框架大多需要将数据全载入到内存方便操作,但这会导致内存消耗问题,MiniExcel 尝试以 Stream 角度写底层算法逻辑,能让原本1000多MB占用降低到几MB,避免内存不够情况。
特点:
- 低内存耗用,避免OOM、频繁 Full GC 情况
- 支持即时操作每行数据
- 兼具搭配 LINQ 延迟查询特性,能办到低消耗、快速分页等复杂查询
- 轻量,不需要安装 Microsoft Office、COM+,DLL小于150KB
- 简便操作的 API 风格
项目地址:mini-software/MiniExcel: Fast, Low-Memory, Easy Excel .NET helper to import/export/template spreadsheet (support Linux, Mac) (github.com)
安装 MiniExcel
导出数据- public class Student
- {
- public string? Name { get; set; }
- public string? Home { get; set; }
- public int? Age { get; set; }
- }
- //获得当前目录的路径
- string currentDirectory = Directory.GetCurrentDirectory();
- //合并当前目录与Excel文件名
- var path = Path.Combine(currentDirectory, $"{Guid.NewGuid()}.xlsx");
-
- List<Student> studentList = new List<Student>()
- {
- new Student { Name = "小东", Home = "New York", Age = 25 },
- new Student { Name = "小西", Home = "London", Age = 22 },
- new Student { Name = "小南", Home = "Paris", Age = 28 },
- new Student { Name = "小北", Home = "Tokyo", Age = 24 },
- new Student { Name = "小王", Home = "Berlin", Age = 26 }
- };
- MiniExcel.SaveAs(path, studentList);
复制代码 导入Excel中如下图所示:
但是目前还不支持Excel的插入:
因此如果遇到不仅仅只是生成Excel,后续还要向Excel添加数据的需求,可以用csv代替:- //获得当前目录的路径
- string currentDirectory = Directory.GetCurrentDirectory();
- //合并当前目录与CSV文件名
- var path = Path.Combine(currentDirectory, $"{Guid.NewGuid()}.csv");
- List<Student> studentList = new List<Student>()
- {
- new Student { Name = "小东", Home = "New York", Age = 25 },
- new Student { Name = "小西", Home = "London", Age = 22 },
- new Student { Name = "小南", Home = "Paris", Age = 28 },
- new Student { Name = "小北", Home = "Tokyo", Age = 24 },
- new Student { Name = "小王", Home = "Berlin", Age = 26 }
- };
- MiniExcel.SaveAs(path, studentList);
复制代码 生成的CSV文件如下图所示:
向CSV文件继续添加数据:- //获得当前目录的路径
- string currentDirectory = Directory.GetCurrentDirectory();
- //合并当前目录与Excel文件名
- //var path = Path.Combine(currentDirectory, $"{Guid.NewGuid()}.csv");
- var path = Path.Combine(currentDirectory, "10de09bb-ad8c-4430-b717-5f24117a11a6.csv");
- List<Student> studentList = new List<Student>()
- {
- new Student { Name = "小东", Home = "New York", Age = 25 },
- new Student { Name = "小西", Home = "London", Age = 22 },
- new Student { Name = "小南", Home = "Paris", Age = 28 },
- new Student { Name = "小北", Home = "Tokyo", Age = 24 },
- new Student { Name = "小王", Home = "Berlin", Age = 26 }
- };
- //MiniExcel.SaveAs(path, studentList);
- MiniExcel.Insert(path, studentList);
复制代码 继续添加数据后的CSV文件如下图所示:
导入数据- var path = "你的文件路径";
- var rows = MiniExcel.Query<Student>(path);
复制代码 实现效果如下所示:
来源:https://www.cnblogs.com/mingupupu/p/18013077
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