下载PDF时如何自动创建文件夹/在浏览器中运行“另存为”和“另存为”功能

Question

Currently I'm trying to find a way to automatically create a new folder to save a PDF into it or either save it in a common file all computers have or make my browser pop-up run a "save as" and "save to" function whenever the client click the download button. which is typically how people try to download PDF/ZIP in other websites.

My webapp basically allow the user is trying to download the PDF from my server-side code

As you can see from my codes, I have been trying ways to save my PDF file and this is how i try to save my PDF in a hard-coded directory like this

var doc1 = new Document();
var filename = "Official Report" + DateTime.Now.ToString("yyyyMMddHHmmssfff") + ".pdf";
var output = new FileStream(Path.Combine("C:/Users/apr13mpsip/Downloads", filename), FileMode.Create);
iTextSharp.text.pdf.PdfWriter.GetInstance(doc1, output);

How do i use the

server.mappath("");

or how do i automatically create a new folder when trying to download the PDF file.

Answer 1

If you are using a web application you won't be able to create a folder through a browser on the clients computer because that would be a security issue.

If you are doing this in another type of application that is on the user's computer. Then all you have to do is include System.IO and do a Directory.CreateDirectory

http://msdn.microsoft.com/en-us/library/54a0at6s(v=vs.100).aspx

Answer 2

string pid = Session["PatientID"].ToString();
string strUploadPath = Server.MapPath("Files") + "\\" + pid + "\\";
if (!System.IO.Directory.Exists(strUploadPath))
{
    System.IO.Directory.CreateDirectory(strUploadPath);
}
fuSample.SaveAs(strUploadPath + fuSample.FileName);
lblMessage.Text = "File Successfully Uploaded";

This creates a subfolder in a files folder, the subfolder can be the user's ID so they are all unique. Change it from the Session variable to whatever you want.