epplus 在发送到浏览器时将值添加到范围获取部分已经存在

如何解决epplus 在发送到浏览器时将值添加到范围获取部分已经存在

我们有一个模板，我正在尝试将数据添加到我们在 xlsm 模板中设置的数据范围。但是当我尝试发送到浏览器时，我得到 Part 已经存在。所以想知道我做错了什么，因为我试图填写文档中的一个范围。我的代码如下：

 Dim fileInfo As FileInfo = New FileInfo(m_sReportTemplate)
   Dim pck As New ExcelPackage(fileInfo)
   AccessModule.InsertRowsIntoSimpleTemplate(m_sReportTemplate,m_sheetDataDS,Session,strversion,pck)
  Response.Clear()
  Response.ClearHeaders()
   Response.AppendHeader("content-disposition","attachment; filename=" & strTemplate)
   Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"
   Response.BinaryWrite(pck.GetAsByteArray())
    Response.Flush()
    Response.End()

InsertRowsIntoSimpleTemplate function(pck is sent to this byref):
Dim worksheet As ExcelWorksheet = pck.Workbook.Worksheets("Info")
            Dim range As ExcelNamedRange = worksheet.Workbook.Names("UserInfo")
            Dim Startcol As String = range.Start.Column
            Dim StartRow As String = range.Start.Row
            Dim Endcol As String = range.End.Column
            Dim Endrow As String = range.End.Row
            For col As Integer = Startcol To Endcol
                For row As Integer = StartRow To Endrow
                    For c As Integer = 0 To dstemp.Tables(0).Rows.Count - 1
                        worksheet.Cells(worksheet.Cells(row,col).Address).Value = dstemp.Tables(0).Rows(c).Item(0)
                    Next
                Next
            Next
         pck.Save()

任何帮助将不胜感激， 谢谢， JT