2013-03-04 106 views
3

我有一個需要上傳文件和修改,然後返回相同的。我不需要將文件保存到任何位置,但操作它並返回。但是我不知道如何返回文件。ASP.NET MVC返回Excel文件

下面的代碼允許文件保存,我甚至用保存文件編寫代碼。唯一的問題是我收到一個錯誤,該文件已被其他用戶打開。

該進程無法訪問文件'D:\ Places \ places \ App_Data \ 877d36d3-ce29-48d1-995a-ea6652a528a7C2.xlsx',因爲它正在被另一個進程使用。

能否請你幫我

[AcceptVerbs(HttpVerbs.Post)] 
public ActionResult FileUpload(HttpPostedFileBase uploadFile) 
{ 
    if (uploadFile.ContentLength > 0) 
    { 
     string path = string.Empty; 
     var fileName = Path.GetFileName(uploadFile.FileName); 
     path = Path.Combine(Server.MapPath("~/App_Data/"), Guid.NewGuid() + fileName); 
     uploadFile.SaveAs(path); 

     Excel.Application xlApp = new Excel.Application(); 
     Excel.Workbook xlWorkbook = xlApp.Workbooks.Open(path); 
     Excel._Worksheet xlWorksheet = (Excel._Worksheet)xlWorkbook.Sheets[1]; 
     Excel.Range xlRange = xlWorksheet.UsedRange; 
     int rowCount = xlRange.Rows.Count; int colCount = xlRange.Columns.Count; 
     (xlRange.Cells[4, 5] as Excel.Range).Value2 = "asdF"; 
     (xlRange.Cells[4, 6] as Excel.Range).Value2 = "asdF"; 
     (xlRange.Cells[4, 7] as Excel.Range).Value2 = "asdF"; 
     (xlRange.Cells[4, 8] as Excel.Range).Value2 = "asdF"; 

     releaseObject(xlWorksheet); 
     releaseObject(xlWorkbook); 
     releaseObject(xlApp); 
     GC.Collect(); 

     uploadFile.InputStream.Dispose(); 
     return File(path, "application/text"); 

    } 
    else 
    { 
     return View(); 
    } 
} 

private void releaseObject(object obj) 
{ 
    try 
    { 
     System.Runtime.InteropServices.Marshal.ReleaseComObject(obj); 
     obj = null; 
    } 
    catch (Exception ex) 
    { 
     obj = null; 
     //MessageBox.Show("Exception Occured while releasing object " + ex.ToString()); 
    } 
    finally 
    {enter code here 
     GC.Collect(); 
    } 
} 

回答

3

的動作,你可以返回FileStreamResult

return new FileStreamResult([memory stream], "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"); 

您還可能要返回前關閉並保存工作簿到一個臨時區域。從錯誤它看起來像文件仍然打開。

+0

不確定它是否是正確的MIME類型的Excel工作簿。但這應該是一個快速的谷歌搜索找到。 – 2013-03-04 14:46:04