之前写了一个模型导出Excel通用类,但是在实际应用中,可能不是直接导出模型,而是通过Linq查询后获取到最终结果再导出
通用类:
public enum DataTypeEnum { Int = 0, Float = 1, Double = 2, String = 3, DateTime = 4, Date = 5 } public class ExportFieldInfo { /// <summary> /// 字段名,用于反射获取值 /// </summary> public string FieldName { get; set; } /// <summary> /// 中文名,用于导出标题 /// </summary> public string DisplayName { get; set; } /// <summary> /// 数据类型,用于强制转换,并进行格式化,其实利用反射也可以获取到数据类型,此处因为要处理Date和Date的显示格式 /// </summary> public DataTypeEnum DataType { get; set; } } public class ExcelHelper { /// <summary> /// 导出到内存流 /// </summary> /// <param name="data">需要导出的模型列表</param> /// <param name="fieldInfo">导出的字段列表信息</param> /// <param name="sheetRows">每个工作表的行数</param> /// <returns></returns> public static MemoryStream ToExcel(List<object> data, List<ExportFieldInfo> fieldInfo, int sheetRows = 65536) { //创建Excel文件的对象 NPOI.HSSF.UserModel.HSSFWorkbook book = new NPOI.HSSF.UserModel.HSSFWorkbook(); //需要生成工作溥总簿 int sheetCount = data.Count / sheetRows + 1; int rowCount = data.Count; for (int i = 0; i < sheetCount; i++) { //添加一个sheet NPOI.SS.UserModel.ISheet sheet = book.CreateSheet("Sheet" + Convert.ToString(i)); //给sheet添加第一行的头部标题 NPOI.SS.UserModel.IRow rowTitle = sheet.CreateRow(0); for (int k = 0; k < fieldInfo.Count; k++) { rowTitle.CreateCell(k).SetCellValue(fieldInfo.ElementAt(k).DisplayName); } //处理Excel一张工作簿只能放65536行记录的问题 //因为头部占一行,所以要减1 for (int j = 0; j < sheetRows - 1; j++) { //将数据逐步写入sheet各个行 NPOI.SS.UserModel.IRow rowtemp = sheet.CreateRow(j + 1); int dataIndex = i * (sheetRows - 1) + j; for (int k = 0; k < fieldInfo.Count; k++) { //获取类型 Type type = data[dataIndex].GetType(); //获取指定名称的属性 System.Reflection.PropertyInfo propertyInfo = type.GetProperty(fieldInfo.ElementAt(k).FieldName); //获取属性值 var value = propertyInfo.GetValue(data[dataIndex], null); switch (fieldInfo.ElementAt(k).DataType) { case DataTypeEnum.Int: rowtemp.CreateCell(k).SetCellValue(Convert.ToInt32(value)); break; case DataTypeEnum.Float: rowtemp.CreateCell(k).SetCellValue(Convert.ToDouble(value)); break; case DataTypeEnum.Double: rowtemp.CreateCell(k).SetCellValue(Convert.ToDouble(value)); break; case DataTypeEnum.String: rowtemp.CreateCell(k).SetCellValue(Convert.ToString(value)); break; case DataTypeEnum.DateTime: rowtemp.CreateCell(k).SetCellValue(Convert.ToDateTime(value).ToString("yyyy-MM-dd HH:mm:ss.SSS")); break; case DataTypeEnum.Date: rowtemp.CreateCell(k).SetCellValue(Convert.ToDateTime(value).ToString("yyyy-MM-dd")); break; default: break; } } //所有记录循环完成 if (i * (sheetRows - 1) + (j + 1) == rowCount) { // 写入到客户端 System.IO.MemoryStream ms = new System.IO.MemoryStream(); book.Write(ms); ms.Seek(0, SeekOrigin.Begin); return ms; } } } return null; } }
调用:
/// <summary> /// 导出Excel /// </summary> /// <param name="request">请求参数集合</param> /// <returns></returns> public FileResult ToExcel(ActiveRecordRequest request) { //获取记录信息 Response<object> listInfo = this.CrmService.GetActiveRecordList(request); //初始化需要导出字段 List<ExportFieldInfo> fieldInfo = new List<ExportFieldInfo>(); fieldInfo.Add(new ExportFieldInfo() { FieldName = "ActiveDate", DisplayName = "活动日期", DataType = DataTypeEnum.Date }); fieldInfo.Add(new ExportFieldInfo() { FieldName = "ActiveSubject", DisplayName = "活动主题", DataType = DataTypeEnum.String }); fieldInfo.Add(new ExportFieldInfo() { FieldName = "Remark", DisplayName = "备注", DataType = DataTypeEnum.String }); return File(ExcelHelper.ToExcel(listInfo.Data, fieldInfo), "application/vnd.ms-excel", "活动信息表.xls"); }
js调用:
//导出到Excel ToExcel: function () { location.href = "/" + PageParam.Area + "/" + PageParam.AjaxController + "/ToExcel?IsPaging=false"; }
时间: 2024-10-13 02:56:15