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How to create folder and store file in user mobile [duplicate]

I want to make the browser download a PDF document from server instead of opening the file in browser itself. I am using C#.
Below is my sample code which I used. It not working..
string filename = "Sample server url";
response.redirect(filename);

You should look at the "Content-Disposition" header; for example setting "Content-Disposition" to "attachment; filename=foo.pdf" will prompt the user (typically) with a "Save as: foo.pdf" dialog, rather than opening it. This, however, needs to come from the request that is doing the download, so you can't do this during a redirect. However, ASP.NET offers Response.TransmitFile for this purpose. For example (assuming you aren't using MVC, which has other preferred options):
Response.Clear();
Response.ContentType = "application/pdf";
Response.AppendHeader("Content-Disposition", "attachment; filename=foo.pdf");
Response.TransmitFile(filePath);
Response.End();

If you want to render the file(s) so that you could save them at your end instead of opening in the browser, you may try the following code snippet:
//create new MemoryStream object and add PDF file’s content to outStream.
MemoryStream outStream = new MemoryStream();
//specify the duration of time before a page cached on a browser expires
Response.Expires = 0;
//specify the property to buffer the output page
Response.Buffer = true;
//erase any buffered HTML output
Response.ClearContent();
//add a new HTML header and value to the Response sent to the client
Response.AddHeader(“content-disposition”, “inline; filename=” + “output.pdf”);
//specify the HTTP content type for Response as Pdf
Response.ContentType = “application/pdf”;
//write specified information of current HTTP output to Byte array
Response.BinaryWrite(outStream.ToArray());
//close the output stream
outStream.Close();
//end the processing of the current page to ensure that no other HTML content is sent
Response.End();
However, if you want to download the file using a client application then you'll have to use the WebClient class.

I use this by setting inline parameter to true it will show in browser false it will show save as dialog in browser.
public void ExportReport(XtraReport report, string fileName, string fileType, bool inline)
{
MemoryStream stream = new MemoryStream();
Response.Clear();
if (fileType == "xls")
report.ExportToXls(stream);
if (fileType == "pdf")
report.ExportToPdf(stream);
if (fileType == "rtf")
report.ExportToRtf(stream);
if (fileType == "csv")
report.ExportToCsv(stream);
Response.ContentType = "application/" + fileType;
Response.AddHeader("Accept-Header", stream.Length.ToString());
Response.AddHeader("Content-Disposition", String.Format("{0}; filename={1}.{2}", (inline ? "Inline" : "Attachment"), fileName, fileType));
Response.AddHeader("Content-Length", stream.Length.ToString());
//Response.ContentEncoding = System.Text.Encoding.Default;
Response.BinaryWrite(stream.ToArray());
Response.End();
}

In case if we are trying to write a bytes array then we can use below one.
Response.Clear();
Response.ContentType = "application/pdf";
Response.AppendHeader("Content-Disposition", "attachment; filename=file.pdf");
Response.BufferOutput = true;
Response.AddHeader("Content-Length", docBytes.Length.ToString());
Response.BinaryWrite(docBytes);
Response.End();

They are almost same in most of the cases but there is a difference:
Add Header will replace the previous entry with the same key
Append header will not replace the key, rather will add another one.

"Invalid folder" error when compressing files with SharpZipLib

I have this function that I'm using to compress a list of files from the user's session, and then streaming it to the user's browser for download:
public static void DownloadAllPhotos()
{
HttpContext.Current.Response.AddHeader(
"Content-Disposition", "attachment; filename=Photos.zip");
HttpContext.Current.Response.ContentType = "application/zip";
List<string> photos= new List<string>();
if (HttpContext.Current.Session != null &&
HttpContext.Current.Session["userPhotos"] != null)
{
photos = (List<string>)HttpContext.Current.Session["userPhotos"];
}
using (var zipStream = new
ZipOutputStream(HttpContext.Current.Response.OutputStream))
{
foreach (string photoUrl in photos)
{
byte[] fileBytes = File.ReadAllBytes(photoUrl);
var fileEntry = new ZipEntry(
Path.GetFileName(photoUrl))
{
Size = fileBytes.Length
};
zipStream.PutNextEntry(fileEntry);
zipStream.Write(fileBytes, 0, fileBytes.Length);
}
zipStream.Flush();
zipStream.Close();
// reset session
HttpContext.Current.Session["userPhotos"] = new List<string>();
}
}
When the user has photo urls in their session, and they click a button to call this function, the files are compressed and the download starts in the user's browser.
But when I try to open the compressed file, I get this error:
Windows cannot open the folder.
The compressed folder "{Path to my file}" is invalid.
Am I doing something wrong that's causing this error?

Check out the placement of Response.Flush and ZipEntry.CleanName in this example and see if writing something similar corrects the problem.

Also per the example in #cfeduke 's answer, there is a comment in the 'Create a Zip as a browser download attachment in IIS' that suggests changing Response.ContentType = "application/octet-stream" instead of "application/zip"
// If the browser is receiving a mangled zipfile, IIS Compression may
cause this problem. Some members have found that
//Response.ContentType = "application/octet-stream" has solved this.
May be specific to Internet Explorer.
Worked for me. And it was not IE specific (I use Chrome).

Force download ASP.Net

In ASP.Net (with C#) I'm trying to create a .DAT file with plain text in it and send it to the browser and force download. I've tried several things but I can't get it working. In my aspx-file there is an ImageButton
<asp:ImageButton ID="btnSave" runat="server" CausesValidation="False" ImageUrl="~/Images/Stages/Database/Save.png" OnClick="btnSave_OnClick" Width="26px" />
In the OnClick-method I'm trying to create the file and send it to the browser.
protected void btnSave_OnClick(object sender, EventArgs e)
{
string file = "test.dat";
string fileName = "~\\Stages\\Broekx\\Databanken\\" + file;
FileStream fs = new FileStream(MapPath(fileName), FileMode.Open);
long cntBytes = new FileInfo(MapPath(fileName)).Length;
byte[] byteArray = new byte[Convert.ToInt32(cntBytes)];
fs.Read(byteArray, 0, Convert.ToInt32(cntBytes));
fs.Close();
ImageButton btnSave = (ImageButton)FormViewStagesDummy.FindControl("btnSave");
btnSave.Visible = false;
File.Delete(Server.MapPath(fileName));
if (byteArray != null)
{
this.Response.Clear();
this.Response.ContentType = "text/plain";
this.Response.AddHeader("content-disposition", "attachment;filename=" + file);
this.Response.BinaryWrite(byteArray);
this.Response.End();
this.Response.Flush();
this.Response.Close();
}
}
The file test.dat exists in the correct folder and has to be deleted after it has been read into bytes. I've tried this without deleting the file and that wont work either.
After clicking btnSave the button has to be hidden, so that's why I set the parameter Visible to false.
I've also tried it with content-type "application/octet-stream" or with a PDF file and content-type "application/pdf" but nothing works. The page loads normally and no file is being downloaded.

Is the file string's path actually correct?
this.Response.AddHeader("content-disposition", "attachment;filename=" + file);
Should it not be filename?
Why are you deleting the file before it is written to the response? Would it not make more sense to serve the file via the response and then delete it?
i.e. call
File.Delete(Server.MapPath(fileName));
after the repsonse.
You should try:
Response.TransmitFile( Server.MapPath(fileName) );
Response.End();
TransmitFile is very efficient because it basically offloads the file streaming to IIS including potentially causing the file to get cached in the Kernal cache (based on IIS's caching rules).
Response.End();

Response.Clear();
Response.ClearContent();
Response.ClearHeaders();
Response.ContentType = "text/plain";
Response.AppendHeader("Content-Disposition", "attachment; filename = " + fileName);
Response.TransmitFile(Server.MapPath("~/foldername/" + fileName));
Response.End();

MVC C# Download file and save as dialog

Hi all wondering if someone can help; i've written this code which will generate an excel spreadsheet and save it to a specified location. I want to then display a "Save as" dialogue box by reading the file from the stored location and then asking then user where they want to store it. The excel file is being generated fine and i can open it normally! However my problem is the code i've written seems to be outputting the file directly to my browser, so i get all the contents of the excel file on my browser screen, not displaying the save as dialogue box as expected!
public ActionResult FormSuccess()
{
String FileName = System.Configuration.ConfigurationManager.AppSettings["FileName"].ToString();
String FilePath = System.Configuration.ConfigurationManager.AppSettings["FileSaveLocation"].ToString();
System.Web.HttpResponse response = System.Web.HttpContext.Current.Response;
response.ClearContent();
response.Clear();
response.ContentType = "application/vnd.xls";
response.AddHeader("Content-Disposition", "attachment; filename=" + FileName + ";");
response.TransmitFile(FilePath + FileName);
response.End();
return PartialView("FormSuccess");
}

Yo Vince, how's tricks? Still wearing the medallion? :)
Shouldn't you be using FileContentResult instead of PartialView? You won't be able to return the file AND the HTML "success" content in the same call - you should probably call the PartialView first, which would then use javascript to open the FileContentResult URL in a new window.
See this: http://www.mikesdotnetting.com/Article/125/ASP.NET-MVC-Uploading-and-Downloading-Files
and this url as well :
http://weblogs.asp.net/rajbk/archive/2010/05/03/actionresult-types-in-mvc2.aspx

I think that your problem is that you return PartialView. Let me give you small exmaple of my implemetation:
public ActionResult FileXls()
{
var output = new MemoryStream();
var writer = new StreamWriter(output);
//create your workbook excel file
....
//workbook.Save(output);
writer.Flush();
output.Position = 0;
return File(output, "text/excel", "file.xls");
}

Download file for reading question using HttpWebRequest

If I have a URL to a download, www.website.com/myfile.html
so when that link is clicked it automatically starts a download, which may be myfile.txt for example, how would I get that file into C# for reading..
Is that what Net.WebRequest.Create(url), Net.HttpWebRequest does?

You could achieve this using WebClient:
using (var client = new WebClient())
{
// Download and save the file locally
client.DownloadFile("http://www.website.com/myfile.html", "myfile.html");
}
If you don't want to store the file locally but only read the contents you could try this:
using (var client = new WebClient())
{
string result = client.DownloadString("http://www.website.com/myfile.html");
}

Using C# as an example, here is how one might force the download of a file after clicking a button, link, etc...
public void DownloadFileLink_Click(object sender, EventArgs e)
{
//Get the file data
byte[] fileBytes = Artifacts.Provider.GetArtifact(ArtifactInfo.Id);
//Configure the response header and submit the file data to the response stream.
HttpContext.Current.Response.AddHeader("Content-disposition", "attachment;filename=" + "myDynamicFileName.txt");
HttpContext.Current.Response.ContentType = "application/octet-stream";
HttpContext.Current.Response.BinaryWrite(fileBytes);
HttpContext.Current.Response.End();
}
With this in mind, what you need to look for is the Header in the response, the Header will contain an item Content-disposition which will contain the filename of the file being streamed in the response.