C# 如何在API端转换excel？

问题是，如何在API中转换excel并作为文件传输回服务？ 目前，我已经能够从数据库中获取数据，但从数据库中获取数据后，我不确定如何将数据转换为excel，然后再发送回服务。在从api获得完整的数据后，我需要在api中转换它，而不是在角度组件端

    [Route("getExcelData")]
    [Authenticate]
    [HttpPost]
    public IHttpActionResult GetExcelData([FromBody]Report obj)
    {
        try
        {
            this.Contents.Add("Result", new ReportService().getExcelData(obj.Id, obj.FromDate, obj.ToDate));
            return JsonResponse();
        }
        catch (Exception e)
        {
            LogManager.Instance.InsertLog(LogLevel.Error, e.Message, e.StackTrace, "ReportController", "ReportController", null, null);
            ExceptionManager.Instance.Add(String.Format("GetData Failed: {0}", e.Message), $"{e.StackTrace} Inner Exception: {e.InnerException}");
            this.Contents.Add("Result", null);
            return JsonResponse();
        }
    }

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下面的代码为我工作

请找到更多的私奔

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我应该如何在代码中实现它？对不起，我真的不知道如何制作发行版。首先将数据作为表从DB提取到API中，然后根据XML进行转换。然后将其传递到

Path.GetFullPath

#region Loading the data to DataGridView
DataSet customersDataSet = new DataSet();

//Read the XML file with data
string inputXmlPath = Path.GetFullPath(@"../../Data/Employees.xml");
customersDataSet.ReadXml(inputXmlPath);
DataTable dataTable = new DataTable();

//Copy the structure and data of the table
dataTable = customersDataSet.Tables[1].Copy();

//Removing unwanted columns
dataTable.Columns.RemoveAt(0);
dataTable.Columns.RemoveAt(10);
this.dataGridView1.DataSource = dataTable;

dataGridView1.AlternatingRowsDefaultCellStyle.BackColor = Color.White;
dataGridView1.RowsDefaultCellStyle.BackColor = Color.LightBlue;
dataGridView1.ColumnHeadersDefaultCellStyle.Font = new System.Drawing.Font("Tahoma", 9F, ((System.Drawing.FontStyle)(System.Drawing.FontStyle.Bold)));
dataGridView1.ForeColor = Color.Black;
dataGridView1.BorderStyle = BorderStyle.None;
#endregion

using (ExcelEngine excelEngine = new ExcelEngine())
{
    IApplication application = excelEngine.Excel;

    //Create a workbook with single worksheet
    IWorkbook workbook = application.Workbooks.Create(1);

    IWorksheet worksheet = workbook.Worksheets[0];

    //Import from DataGridView to worksheet
    worksheet.ImportDataGridView(dataGridView1, 1, 1, isImportHeader: true, isImportStyle: true);

    worksheet.UsedRange.AutofitColumns();
    workbook.SaveAs("Output.xlsx");
}