vue实现Excel文件的上传与下载功能的两种方式

<el-col style="padding: 10px 0 20px;">    <el-button     class="pull-right"     icon="el-icon-upload"     type="primary"     size="mini"     @click="importFile()"    >批量导入</el-button>    <el-button     class="pull-right right-10"     icon="el-icon-download"     type="primary"     size="mini"     @click="downloadFile('档案模板')"    >模板下载</el-button>    <el-button     size="mini"     type="primary"     icon="el-icon-plus"     class="pull-right"     @click="addRow"    >新增</el-button>    <div class="pull-right">     <el-input      placeholder="请输入编码,名称"      prefix-icon="el-icon-search"      v-model="FinQueryParams.archiveFilter"      size="mini"     ></el-input>    </div>   </el-col>　　 <!-- 批量导入Dialog开始 -->  <uploadTemp   :apiURL="fileUploadUrl"   ref="refFileUpload"   :Refresh="Refresh"   :OtherParams="{brandId: QueryParams.BrandID}"  ></uploadTemp>  <!-- 批量导入Dialog结束 -->importFile() {  this.$refs.refFileUpload.open(); }　

submitFile() {   const _this = this;   if (!_this.files.name) {    _this.$message.warning("请选择要上传的文件！");    return false;   }   let fileFormData = new FormData();   //filename是键，file是值，就是要传的文件   fileFormData.append("file", _this.files, _this.files.name);   if(_this.OtherParams){    const keys=Object.keys(_this.OtherParams);    keys.forEach(e=>{     fileFormData.append(e, _this.OtherParams[e]);    })   }   let requestConfig = {    headers: {     "Content-Type": "multipart/form-data"    }   };   AjaxHelper.post(_this.apiURL, fileFormData, requestConfig)    .then(res => {     console.log(res);     if (res.success) {      const result = res.result;      if (result.errorCount == 0 && result.successCount > 0) {       _this.$message({        message: `导入成功,成功${result.successCount}条`,        type: "success"       });       _this.closeFileUpload();       _this.Refresh();      } else if (result.errorCount > 0 && result.successCount >= 0) {       _this.Refresh();       _this.tableData = result.uploadErrors;       _this.successCount = result.successCount;       _this.innerVisible = true;      } else if (result.errorCount == 0 && result.successCount == 0) {       _this.$message({        message: `上传文件中数据为空`,        type: "error"       });      }     }    })    .catch(function(error) {     console.log(error);    });  },

downloadFile(name) {   let requestConfig = {    headers: {     "Content-Type": "application/json;application/octet-stream"    }   };   AjaxHelper.post(this.downLoadUrl, requestConfig, {    responseType: "blob"   }).then(res => {    // 处理返回的文件流    const content = res.data;    const blob = new Blob([content]);    var date =     new Date().getFullYear() +     "" +     (new Date().getMonth() + 1) +     "" +     new Date().getDate();    const fileName = date + name + ".xlsx";    if ("download" in document.createElement("a")) {     // 非IE下载     const elink = document.createElement("a");     elink.download = fileName;     elink.style.display = "none";     elink.href = URL.createObjectURL(blob);     document.body.appendChild(elink);     elink.click();     URL.revokeObjectURL(elink.href); // 释放URL 对象     document.body.removeChild(elink);    } else {     // IE10+下载     navigator.msSaveBlob(blob, fileName);    }   });  },

public UploadResult UploadFiles(IFormFile file, Guid brandId)    {      try      {        UploadResult uploadResult = new UploadResult();        if (file == null)        {          throw new UserFriendlyException(501, "上传的文件为空，请重新上传");        }        string filename = Path.GetFileName(file.FileName);        string fileEx = Path.GetExtension(filename);//获取上传文件的扩展名        string NoFileName = Path.GetFileNameWithoutExtension(filename);//获取无扩展名的文件名        string FileType = ".xls,.xlsx";//定义上传文件的类型字符串        if (!FileType.Contains(fileEx))        {          throw new UserFriendlyException(501, "无效的文件类型，只支持.xls和.xlsx文件");        }        //源数据        MemoryStream msSource = new MemoryStream();        file.CopyTo(msSource);        msSource.Seek(0, SeekOrigin.Begin);        DataTable sourceExcel = ReadStreamToDataTable(msSource, "", true);        //模板数据        string dataDir = _hosting.WebRootPath;//获得当前服务器程序的运行目录         dataDir = Path.Combine(dataDir, "ExcelTemplate");        var path = dataDir + "//档案模版.xlsx";        MemoryStream msModel = new MemoryStream();        FileStream stream = new FileStream(path, FileMode.Open);        stream.CopyTo(msModel);        msModel.Seek(0, SeekOrigin.Begin);        DataTable templateExcel = ReadStreamToDataTable(stream, "", true);        //验证是否同模板相同         string columnName = templateExcel.Columns[0].ColumnName;        if (columnName != sourceExcel.Columns[0].ColumnName)        {          throw new UserFriendlyException(501, "上传的模板文件不正确");        }        int sucessCount = 0;        int errorCount = 0;        // 处理后台逻辑 执行 插入操作        uploadResult.SuccessCount = sucessCount;        uploadResult.ErrorCount = errorCount;        uploadResult.uploadErrors = errorList;        return uploadResult;      }      catch (Exception ex)      {        throw new UserFriendlyException(501, "上传的模板文件不正确");      }    }

 public static DataTable ReadStreamToDataTable(Stream fileStream, string sheetName = null, bool isFirstRowColumn = true)    {      //定义要返回的datatable对象      DataTable data = new DataTable();      //excel工作表      ISheet sheet = null;      //数据开始行(排除标题行)      int startRow = 0;      try      {        //根据文件流创建excel数据结构,NPOI的工厂类WorkbookFactory会自动识别excel版本，创建出不同的excel数据结构        IWorkbook workbook = WorkbookFactory.Create(fileStream);        //如果有指定工作表名称        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);        }        if (sheet != null)        {          IRow firstRow = sheet.GetRow(0);          //一行最后一个cell的编号 即总的列数          int cellCount = firstRow.LastCellNum;          //如果第一行是标题列名          if (isFirstRowColumn)          {            for (int i = firstRow.FirstCellNum; i < cellCount; ++i)            {              ICell cell = firstRow.GetCell(i);              if (cell != null)              {                string cellValue = cell.StringCellValue;                if (cellValue != null)                {                  DataColumn column = new DataColumn(cellValue);                  data.Columns.Add(column);                }              }            }            startRow = sheet.FirstRowNum + 1;          }          else          {            startRow = sheet.FirstRowNum;          }          //最后一列的标号          int rowCount = sheet.LastRowNum;          for (int i = startRow; i <= rowCount; ++i)          {            IRow row = sheet.GetRow(i);            if (row == null || row.FirstCellNum < 0) continue; //没有数据的行默认是null　　　　　　　            DataRow dataRow = data.NewRow();            for (int j = row.FirstCellNum; j < cellCount; ++j)            {              //同理，没有数据的单元格都默认是null              ICell cell = row.GetCell(j);              if (cell != null)              {                if (cell.CellType == CellType.Numeric)                {                  //判断是否日期类型                  if (DateUtil.IsCellDateFormatted(cell))                  {                    dataRow[j] = row.GetCell(j).DateCellValue;                  }                  else                  {                    dataRow[j] = row.GetCell(j).ToString().Trim();                  }                }                else                {                  dataRow[j] = row.GetCell(j).ToString().Trim();                }              }            }            data.Rows.Add(dataRow);          }        }        return data;      }      catch (Exception ex)      {        throw ex;      }    }文件下载比较简单 public async Task<FileStreamResult> DownloadFiles()    {      string dataDir = _hosting.WebRootPath;//获得当前服务器程序的运行目录       dataDir = Path.Combine(dataDir, "ExcelTemplate");      var path = dataDir + "//档案模版.xlsx";      var memoryStream = new MemoryStream();      using (var stream = new FileStream(path, FileMode.Open))      {        await stream.CopyToAsync(memoryStream);      }      memoryStream.Seek(0, SeekOrigin.Begin);      return new FileStreamResult(memoryStream, "application/octet-stream");//文件流方式，指定文件流对应的ContenType。    }

 public async Task<FileStreamResult> DownloadFiles()    {      string dataDir = _hosting.WebRootPath;//获得当前服务器程序的运行目录       dataDir = Path.Combine(dataDir, "ExcelTemplate");      var path = dataDir + "//档案模版.xlsx";      var memoryStream = new MemoryStream();      using (var stream = new FileStream(path, FileMode.Open))      {        await stream.CopyToAsync(memoryStream);      }      memoryStream.Seek(0, SeekOrigin.Begin);      return new FileStreamResult(memoryStream, "application/octet-stream");//文件流方式，指定文件流对应的ContenType。    }

public class UploadResult  {    public int RepeatCount { get; set; }    public int SuccessCount { get; set; }    public int FileRepeatCount { get; set; }    public int ErrorCount { get; set; }    public List<UploadErrorDto> uploadErrors { get; set; }  }  public class UploadErrorDto  {    public string RowIndex { get; set; }    public string ErrorCol { get; set; }    public string ErrorData { get; set; }  }