C # Excel helper classes

First, the original intention of the Excel help class

Usually in C# project development, we often involve the operation of some table contents, and then we need to export these contents to an Excel file for saving, or we need to import the contents of the Excel template into the program, in order to simplify developmentThe workload of personnel, this Excel helper class is designed to solve these problems.

Second, the function of Excel help class

*    Function:
*       1. Export the data to an Excel file
*      2. Import the data of the Excel file into the DataTable

Three, Excel help class

/**** Title: "Basic Tools" project* Subject: Excel Help Class*Description:*		Function:* 1. Export data to Excel file* 2. Import the data from the Excel file into the DataTable*Date: 2022* Version: Version 0.1* Author: Coffee* Modify Recoder:*/using System;using System.Collections.Generic;using System.Data;using System.IO;using System.Text;using NPOI.HSSF.UserModel;using NPOI.SS.Formula.Eval;using NPOI.SS.UserModel;using System.Linq;using NPOI.SS.Util;using System.Text.RegularExpressions;using NPOI.XSSF.UserModel;namespace Utils{public class ExcelHelper{#region Export from DataTable to excel file