C# TempData未在FileContentResult中保留值
我有以下代码:C# TempData未在FileContentResult中保留值,c#,tempdata,filecontentresult,C#,Tempdata,Filecontentresult,我有以下代码: [Authorize] [HttpGet] public FileContentResult DownloadMsgAsPdf(string FileId, string outer = "") { var Results = (SearchResult)TempData["Results"]; var msg = Results.emails[FileId]; ... return File(pdf
[Authorize]
[HttpGet]
public FileContentResult DownloadMsgAsPdf(string FileId, string outer = "")
{
var Results = (SearchResult)TempData["Results"];
var msg = Results.emails[FileId];
...
return File(pdfBytes, System.Net.Mime.MediaTypeNames.Application.Octet, msg.Id + ".pdf");
}
现在只要运行一次(点击一个链接),一切都会很好。但是,在第二次单击它时(没有其他更改或调用),它会出错,结果为空。我想这意味着TempData正在被清除,但这怎么可能呢
以下是完整的代码(如果需要):
[Authorize]
[HttpGet]
public FileContentResult DownloadMsgAsPdf(string FileId, string outer = "")
{
var Results = (SearchResult)TempData["Results"];
var msg = Results.emails[FileId];
TempData.Keep();
msg.BodyHTML = System.Web.HttpUtility.HtmlDecode(msg.BodyHTML);
var htmlContent = String.Format("<center><p><b>Case ID</b>: " + msg.Id
+ " <b>User ID</b>: " + Session["userid"]
+ " <b>Privileged</b>: ");
if (msg.Tags != null)
{
htmlContent += msg.Tags.ContainsKey("privileged");
}
else
{
htmlContent += "False";
}
htmlContent += " <b>Downloaded</b>: " + DateTime.Now.ToString("g") + "</center>"
+ " <p> -- Forwarded message -- </p> "
+ " <p><b> From :</b> <a href='#'>" + msg.From + "</a> </p> "
+ " <p><b> Date:</b> Mon, oct 25 2010 at 4:42 PM </p> "
+ " <p> <b>Subject:</b> " + msg.Subject + " </p> "
+ " <p><b> To:</b> " + msg.To + " </p> "
+ " <p><b> Cc: </b> </p> "
+ " <div> "
+ " <ul> ";
if(msg.attachementList != null){
if (!msg.attachementList.Any())
{
htmlContent += "<text> "
+ "<li><label style='color:gray'>No attachment</label></li></text>";
}
else
{
foreach (var attachment in msg.attachementList)
{
var filename = System.IO.Path.GetFileName(attachment);
htmlContent += "<text> "
+ "<li><a href='#'>" + filename + "</a></li></text>";
}
}
}
htmlContent += "</ul>"
+ "</div>"
+ "<div padding: 5px;'>"
+ msg.BodyText
+ "</div>"
+ "</div>";
var pdfBytes = (new NReco.PdfGenerator.HtmlToPdfConverter()).GeneratePdf(htmlContent);
if (outer != "")
{
return File(pdfBytes, System.Net.Mime.MediaTypeNames.Application.Octet, msg.Id + ".pdf");
}
return new FileContentResult(pdfBytes, "application/pdf");
}
[授权]
[HttpGet]
public FileContentResult DownloadMsgAsPdf(字符串FileId,字符串outer=”“)
{
var Results=(SearchResult)TempData[“Results”];
var msg=Results.emails[FileId];
TempData.Keep();
msg.BodyHTML=System.Web.HttpUtility.HtmlDecode(msg.BodyHTML);
var htmlContent=String.Format(“Case-ID:”+msg.ID
+“用户ID:+会话[“用户ID”]
+“特权:”;
如果(msg.Tags!=null)
{
htmlContent+=msg.Tags.ContainsKey(“特权”);
}
其他的
{
htmlContent+=“假”;
}
htmlContent+=“下载:”+DateTime.Now.ToString(“g”)+“
+“--转发的消息--”
+“发件人:”
+日期:2010年10月25日星期一下午4:42
+主题:“+msg.Subject+””
+“至:“+msg.To+””
+“Cc:”
+ " "
+“”;
如果(msg.attachementList!=null){
如果(!msg.attachementList.Any())
{
htmlContent+=“”
+“- 无附件”
”;
}
其他的
{
foreach(msg.attachementList中的var附件)
{
var filename=System.IO.Path.GetFileName(附件);
htmlContent+=“”
+“”;
}
}
}
htmlContent+=“
”
+ ""
+“TempData
意味着您只能获得一次。我看到您使用了TempData.Keep()
,但此方法仅对相同的http上下文有效。我认为您可以使用会话
或缓存
而不是临时数据
,谢谢您的响应,有什么方法可以多次使用它吗?我尝试了会话,但出现了相同的错误。