[开发工具]Asp.Net Mvc上传Excel数据(NPOI)

Asp.Net Mvc上传Excel数据(NPOI)

后台代码

/// <summary>
        /// 上传Excel数据
        /// </summary>
        [System.Web.Mvc.HttpPost]
        public ActionResult UpLoadFile(HttpPostedFileBase file)
        {
            string BatchName = Request.Form["BatchName"];//前台传来的值
            DataTable dt = ExcelHelper.ExcelByStreamToTable(file.InputStream);//获取Excel中的数据，且转换成DataTable
            dt.Columns["编号"].ColumnName = "USERNO";//将DataTabel中的列名转换成实体类的名称即数据库对应字段
            dt.Columns["姓名"].ColumnName = "USERNAME";
            dt.Columns["一级部门名称"].ColumnName = "DEPT1";
            dt.Columns["二级部门名称"].ColumnName = "DEPT2";
            dt.Columns["三级部门名称"].ColumnName = "DEPT3";
            dt.Columns["联系电话"].ColumnName = "USERTEL";
            dt.Columns["常驻工作地"].ColumnName = "OFFERADDR";
            List<TB_Com_UserModel> model = ModelConvertHelper<TB_Com_UserModel>.ConvertToModel(dt).ToList();
            model.ForEach(x => { x.VALID = 1; x.COMSTATUS = 0; x.BID = Convert.ToInt32(BatchName); x.CREATETIME = Convert.ToDateTime(DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss")); });
            var result = CallService("api_url", "User/ImportItem", model);//调用Repositorie层进行数据处理
            return Json(result, JsonRequestBehavior.AllowGet);
        }

| 我们在获取到File对象之后(Npoi)读取文件的表格。将其转换成DataTable。之后转换成对应实体类的List。最后进行业务逻辑处理

  /// <summary>
        /// Excel导入成Datable
        /// </summary>
        /// <param name="stream"></param>
        /// <returns></returns>
        public static DataTable ExcelByStreamToTable(Stream stream)
        {
            DataTable dt = new DataTable();
            IWorkbook workbook;
            //XSSFWorkbook 适用XLSX格式，HSSFWorkbook 适用XLS格式
            try
            {
                workbook = new XSSFWorkbook(stream);
            }
            catch (Exception ex)
            {
                workbook = new HSSFWorkbook(stream);
            }
            ISheet sheet = workbook.GetSheetAt(0);
            //表头  
            IRow header = sheet.GetRow(sheet.FirstRowNum);
            List<int> columns = new List<int>();
            for (int i = 0; i < header.LastCellNum; i++)
            {
                object obj = GetValueType(header.GetCell(i));
                if (obj == null || obj.ToString() == string.Empty)
                {
                    dt.Columns.Add(new DataColumn("Columns" + i.ToString()));
                }
                else
                    dt.Columns.Add(new DataColumn(obj.ToString()));
                columns.Add(i);
            }
            //数据  
            for (int i = sheet.FirstRowNum + 1; i <= sheet.LastRowNum; i++)
            {
                DataRow dr = dt.NewRow();
                bool hasValue = false;
                foreach (int j in columns)
                {
                    dr[j] = GetValueType(sheet.GetRow(i).GetCell(j));
                    if (dr[j] != null && dr[j].ToString() != string.Empty)
                    {
                        hasValue = true;
                    }
                }
                if (hasValue)
                {
                    dt.Rows.Add(dr);
                }
            }
            return dt;
        }

    /// <summary>    
    /// 将DataTable转换成List<T>   
    /// </summary>    
    public class ModelConvertHelper<T> where T : new()
    {
        public static IList<T> ConvertToModel(DataTable dt)
        {
            // 定义集合    
            IList<T> ts = new List<T>();

            // 获得此模型的类型   
            Type type = typeof(T);
            string tempName = "";

            foreach (DataRow dr in dt.Rows)
            {
                T t = new T();
                // 获得此模型的公共属性      
                PropertyInfo[] propertys = t.GetType().GetProperties();
                foreach (PropertyInfo pi in propertys)
                {
                    tempName = pi.Name;  // 检查DataTable是否包含此列    
                    if (dt.Columns.Contains(tempName))
                    {
                        if (!pi.CanWrite) continue;// 判断此属性是否有Setter  
                        object value = dr[tempName];
                        if (value != DBNull.Value) pi.SetValue(t, value, null); 
                    }
                }
                ts.Add(t);
            }
            return ts;
        }
    }

| 好的，到了这一步，那我们的前端也是要说下怎么传递。

 //上传
    ImportData:function(){
        if($("#form-category-add").valid()){//这里是表单验证
            if($("input[type='file']").val() != "" && $('#BATCHNAME option:Selected').val() != ""){
                var dataParams = {
                    BatchName: $('#BATCHNAME option:Selected').val()
                };//获取BATCHNAME后台需要的数据
                var opt = {
                    type :'post',
                    dataType: 'json',
                    url: '/User/UpLoadFile',
                    data:dataParams,
                    success: function (result) {
                        if (result.Code == "10000") {
                            parent.layer.msg(result.Data, { icon: 6 });
                            setTimeout(function () {
                                var index = parent.layer.getFrameIndex(window.name);
                                if (index) {
                                    parent.layer.close(index);
                                }
                            }, 500);
                        } else {
                            parent.layer.msg(result.Message, { icon: 5 });
                        }
                    },
                    error: function (e){
                        parent.layer.msg('导入出错', { icon: 5 });
                    }
                };
                $('#UploadFile').ajaxSubmit(opt);
            }else{
                layer.msg("请选择文件",{icon:5});
            }
        }
    },

| 前端页面

<form id="UploadFile" action="" method="post" class="form form-horizontal">
                <div class="formControls col-xs-10 col-sm-10">
                    <input id="FileName" type="text" disabled="disabled" class="input-text radius" />
                </div>
                <a href="javascript:;" class="file">
                    选择文件
                    <input id="FileInput" type="file" name="file" accept=".xls,.xlsx" value=" " />
                </a>
                <div class="mt-15 mb-10" style="text-align:center">
                    <a href="/User/DownloadFile" name="btnDown" id="btnDown" class="btn btn-info radius" style="height: 40px;width:80px;">
                        <i class="Hui-iconfont">&#xe640;</i> 模板
                    </a>

                    <button type="button" name="btnSave" id="btnSave" class="btn btn-secondary radius" style="height:30px;width:70px;margin-left:3%;">
                        <i class="Hui-iconfont">&#xe645;</i>导入
                    </button>
                </div>
            </form>