由于之前在网上查阅一些资料发现总是不能编译通过,不能正常使用,现把能正常使用的代码贴出:
/// <summary> /// Excel导入帮助类 /// </summary> public class ImportExcelUtil<T> where T : new() { //合法文件扩展名 private static List<string> extName = new List<string>() { ".xls", ".xlsx" }; /// <summary> /// 导入Excel内容读取到List<T>中 /// </summary> /// <param name="file">导入Execl文件</param> /// <param name="sheetName">指定读取excel工作薄sheet的名称</param> /// <returns>List<T></returns> public static List<T> InputExcel(IFormFile file, string sheetName = null) { //获取文件后缀名 string type = Path.GetExtension(file.FileName); //判断是否导入合法文件 if(!extName.Contains(type)) { return null; } //转成为文件流 MemoryStream ms = new MemoryStream(); file.CopyTo(ms); ms.Seek(0, SeekOrigin.Begin); //实例化T数组 List<T> list = new List<T>(); //获取数据 list = InputExcel(ms, sheetName); return list; } /// <summary> /// 将Excel文件内容读取到List<T>中 /// </summary> /// <param name="fileName">文件完整路径名</param> /// <param name="sheetName">指定读取excel工作薄sheet的名称</param> /// <param name="isFirstRowColumn">第一行是否是DataTable的列名:true=是,false=否</param> /// <returns>List<T></returns> public static List<T> InputExcel(string fileName, string sheetName = null) { if (!File.Exists(fileName)) { return null; } //根据指定路径读取文件 FileStream fs = new FileStream(fileName, FileMode.Open, FileAccess.Read); //实例化T数组 List<T> list = new List<T>(); //获取数据 list = InputExcel(fs, sheetName); return list; } /// <summary> /// 将Excel文件内容读取到List<T>中 /// </summary> /// <param name="fileStream">文件流</param> /// <param name="sheetName">指定读取excel工作薄sheet的名称</param> /// <returns>List<T></returns> private static List<T> InputExcel(Stream fileStream, string sheetName = null) { //创建Excel数据结构 IWorkbook workbook = WorkbookFactory.Create(fileStream); //如果有指定工作表名称 ISheet sheet = null; if (!string.IsNullOrEmpty(sheetName)) { sheet = workbook.GetSheet(sheetName); //如果没有找到指定的sheetName对应的sheet,则尝试获取第一个sheet if (sheet == null) { sheet = workbook.GetSheetAt(0); } } else { //如果没有指定的sheetName,则尝试获取第一个sheet sheet = workbook.GetSheetAt(0); } //实例化T数组 List<T> list = new List<T>(); if (sheet != null) { //一行最后一个cell的编号 即总的列数 IRow cellNum = sheet.GetRow(0); int num = cellNum.LastCellNum; //获取泛型对象T的所有属性 var propertys = typeof(T).GetProperties(); //每行转换为单个T对象 for (int i = 1; i <= sheet.LastRowNum; i++) { IRow row = sheet.GetRow(i); var obj = new T(); for (int j = 0; j < num; j++) { //没有数据的单元格都默认是null ICell cell = row.GetCell(j); if (cell != null) { var value = row.GetCell(j).ToString(); string str = (propertys[j].PropertyType).FullName; if (str == "System.String") { propertys[j].SetValue(obj, value, null); } else if (str == "System.DateTime") { DateTime pdt = Convert.ToDateTime(value, CultureInfo.InvariantCulture); propertys[j].SetValue(obj, pdt, null); } else if (str == "System.Boolean") { bool pb = Convert.ToBoolean(value); propertys[j].SetValue(obj, pb, null); } else if (str == "System.Int16") { short pi16 = Convert.ToInt16(value); propertys[j].SetValue(obj, pi16, null); } else if (str == "System.Int32") { int pi32 = Convert.ToInt32(value); propertys[j].SetValue(obj, pi32, null); } else if (str == "System.Int64") { long pi64 = Convert.ToInt64(value); propertys[j].SetValue(obj, pi64, null); } else if (str == "System.Byte") { byte pb = Convert.ToByte(value); propertys[j].SetValue(obj, pb, null); } else { propertys[j].SetValue(obj, null, null); } } } list.Add(obj); } } return list; } }
如使用有问题,请留言。希望能帮到你~~~