错误：http查询字符串太长

Question

我在mvc中使用下面的代码来下载Excel文件，但它显示错误查询字符串太长。

public ActionResult Download(string input) 
{ 
    Response.Clear(); 
    Response.ClearHeaders(); 
    Response.ClearContent(); 
    Response.Buffer = true; 
    Response.AddHeader("Content-Disposition", "attachment; filename= download.xlsx"); 
    Response.AddHeader("Content-Type", "application/Excel"); 
    Response.ContentType = "application/vnd.ms-excel"; 
    Response.WriteFile(input); 
    Response.End(); 

    return Content(String.Empty); 
} 

Answer 1

此代码的工作对我来说PDF：

public FileStreamResult DownnloadPDF(int id) 
     {Document document = new Document(); 

      MemoryStream stream = new MemoryStream(); 
       PdfWriter pdfWriter = PdfWriter.GetInstance(document, stream); 
       pdfWriter.CloseStream = false; 

       document.Open(); 

       formatPDF(document, model); 

document.Close(); 

      stream.Flush(); //Always catches me out 
      stream.Position = 0; //Not sure if this is required 

      return File(stream, "application/pdf", "title" + ".pdf"); 
     } 

我真的觉得你的ActionResult将无法正常工作。