C# NPOI 导入与导出Excel文档 兼容xlsx, xls(xf13中已经引用了xlsx的npoi)

标签：ima   model   return   文件名   ORC   引用   object   下载地址   ofo   

这里使用的NPOI版本为: 2.1.3.1

官方下载地址: http://npoi.codeplex.com/releases

版本内包含.Net 2.0 与.Net 4.0

.Net 4.0中包含文件

使用时需引用需要引用所有5个dll

使用到的引用

using NPOI.HSSF.UserModel;
using NPOI.SS.UserModel;
using NPOI.XSSF.UserModel;

还有经过自己整理的导入导出Excel代码：

        /// 

        /// Excel导入成Datable
        /// 
        /// 导入路径(包含文件名与扩展名)
        /// 
        public static DataTable ExcelToTable(string file)
        {
            DataTable dt = new DataTable();
            IWorkbook workbook;
            string fileExt = Path.GetExtension(file).ToLower();
            using (FileStream fs = new FileStream(file, FileMode.Open, FileAccess.Read))
            {
                //XSSFWorkbook 适用XLSX格式，HSSFWorkbook 适用XLS格式
                if (fileExt == ".xlsx") { workbook = new XSSFWorkbook(fs); } else if (fileExt == ".xls") { workbook = new HSSFWorkbook(fs); } else { workbook = null; }
                if (workbook == null) { return null; }
                ISheet sheet = workbook.GetSheetAt(0);

                //表头  
                IRow header = sheet.GetRow(sheet.FirstRowNum);
                List columns = new List();
                for (int i = 0; i 
        /// Datable导出成Excel
        /// 
        /// 
        /// 导出路径(包括文件名与扩展名)
        public static void TableToExcel(DataTable dt, string file)
        {
            IWorkbook workbook;
            string fileExt = Path.GetExtension(file).ToLower();
            if (fileExt == ".xlsx") { workbook = new XSSFWorkbook(); } else if (fileExt == ".xls") { workbook = new HSSFWorkbook(); } else { workbook = null; }
            if (workbook == null) { return; }
            ISheet sheet = string.IsNullOrEmpty(dt.TableName) ? workbook.CreateSheet("Sheet1") : workbook.CreateSheet(dt.TableName);

            //表头  
            IRow row = sheet.CreateRow(0);
            for (int i = 0; i 
        /// 获取单元格类型
        /// 
        /// 
        /// 
        private static object GetValueType(ICell cell)
        {
            if (cell == null)
                return null;
            switch (cell.CellType)
            {
                case CellType.Blank: //BLANK:  
                    return null;
                case CellType.Boolean: //BOOLEAN:  
                    return cell.BooleanCellValue;
                case CellType.Numeric: //NUMERIC:  
                    return cell.NumericCellValue;
                case CellType.String: //STRING:  
                    return cell.StringCellValue;
                case CellType.Error: //ERROR:  
                    return cell.ErrorCellValue;
                case CellType.Formula: //FORMULA:  
                default:
                    return "=" + cell.CellFormula;
            }
        }

C# NPOI 导入与导出Excel文档 兼容xlsx, xls(xf13中已经引用了xlsx的npoi)

标签：ima   model   return   文件名   ORC   引用   object   下载地址   ofo   

原文地址：https://www.cnblogs.com/qqhfeng/p/11324225.html