第二次傳輸文件時出錯

Question

我在將文件傳輸到瀏覽器時收到錯誤，但僅在第二次到第N次出現錯誤。它第一次工作正常。

C:\Users\gfinzer\AppData\Local\Temp\BTnADAkZ.pdf. could not be saved because the source file could not be read 

下面是代碼：

protected void Page_Load(object sender, EventArgs e) 
{ 
    //Get the parameters 
    string reportName = Utils.ParseStringRequest(Request, "reportName") ?? string.Empty; 
    string reportGuid = Session["reportGuid"].ToString(); 
    string path = Path.Combine(ReportPath(), Utils.GetSessionReportName(reportName, reportGuid)); 

    using (var fileStream = File.Open(path, FileMode.Open)) 
    { 
     Response.ClearHeaders(); 
     Response.Clear(); 
     Response.ContentType = "application/octet-stream"; 
     Response.AddHeader("Content-Disposition", "attachment; filename=\"" + reportName + "\""); 
     Response.AddHeader("Content-Length", fileStream.Length.ToString(CultureInfo.InvariantCulture)); 
     StreamHelper.CopyStream(fileStream, Response.OutputStream); 
     Response.Flush(); 
    } 

} 

這裏是CopyStream：

public static void CopyStream(Stream input, Stream output) 
    { 
     byte[] buffer = new byte[32768]; 
     int read; 
     while ((read = input.Read(buffer, 0, buffer.Length)) > 0) 
     { 
      output.Write(buffer, 0, read); 
     } 
    } 

Answer 1

我可能是錯的，但你需要的Flush後Response.End()電話嗎？