C# - Downloading Multiple Files Using Ihttphandler?
Oct 20, 2010
I'm working on a reporting script which runs a number of reports (pdf) on button click. The reports are created on the web server then I'd like the user to be given the option to download the files. I have worked out the script for downloading one file from the server. But I'm not sure how to download multiple files? (there will probably be about 50)
After I run one report I redirect the user to a http handler script.
Response.Redirect("Download.ashx?ReportName=" + "WeeklySummary.pdf");
public class Download : IHttpHandler {
public void ProcessRequest(HttpContext context)
{
I'm new to this forum, infact this is the first forum i hav ever joined. I need some help urgently as i'm reaching the deadline of my project.I created an asp.net website, where administrator will upload files to SQL database which is connected to the webpage. From the web page there will be a download link to download those uploaded files. I have been successful in uploading files to the database. But nothing is striking in my mind regarding how to download files directly from database using asp.net C#.
I'm working on a project that requires the ability to let a user download a pdf from a static location on the server. I'm reading the instructions from this website, it's an old post and I notice they specify in an update that Microsoft's MVC framework has long since included and Action Result that allows the same functionality they discuss thus rendering it obsolete, I've looked a bit online but haven't been able to find any resources that discuss this built-in functionality.
I got file names in an ArrayList say my _files. What i want to do is that i want to download files in zipformat when an user presses a back say "download now".
i made a file uploader to folder named (Books) and i saved the name and the bath of the uploaded file to my DataBase but when i wanna download the uploaded file from the server ? how i make it ? by hyperlink ?
I am working on some project where I am needed to allow users to upload files, but only in pdf and .doc format. Now I know how to let users upload files, but I do not know how to check whether an uploading files is pdf and .doc or not. How could I know that? And how could I know the size of each file, for the file should be no greater than 3 MB?
Also, I have alloted a separate folder for the files that are uploaded by users. I have one page that displays the links to download the files in that folder. I needed to know how could I keep the track of the folder, for the files get uploaded every time? Or in other words, how could my 'downloads page' know about the files in that folder and create links for each file in that folder for the download? Also, if I create a link of a file for downloading purposes, will the file be downloaded when one clicks the link?
I have ASP.NET page with an iframe on it for displaying some pdf reports on this page. When user select the report type from dropdown, I add the needed for report data into the ASP.NET Session and change the attribute "src" of the iframe to .ashx module address which generates the .pdf report.But if Adobe glug-in for viewing .pdf files in browser is not installed, browser proposes to save report file and name of the proposed file is "HandlerName.ashx".But I want to make the browser proposed to save the file with the name "Report.pdf".
I used this sample to work around the issue we were having with large files. [URL] Unfortunately, when I attempt to download large files of 30MBs or more, the download times out and the user gets a partial download. It doesn't seem to be a consistant percentage of the download either. I attempted to download a 50MB file and got to 33MB. When trying a 30MB file, I downloaded 24MB.Below is my code.
if (File.Exists(strFilePath)) { fileName = System.IO.Path.GetFileName(strFilePath); Response.Clear(); system.IO.Stream iStream = null; byte[] buffer = new Byte[10000]; int length; long dataToRead; try { iStream = new System.IO.FileStream(strFilePath, System.IO.FileMode.Open, System.IO.FileAccess.Read, System.IO.FileShare.Read); dataToRead = iStream.Length; //FileInfo file = new FileInfo(strFilePath); Response.ContentType = "application/octet-stream"; Response.AddHeader("Content-Length", iStream.Length.ToString()); Response.AddHeader("Content-Disposition", "attachment; filename=" + fileName.Replace(" ", string.Empty)); while (dataToRead > 0) { if (Response.IsClientConnected) { length = iStream.Read(buffer, 0, 10000);..................
I created a HttpHandler for downloading files from the server. It seems it is not handling anything...I put a breakpoint in the ProcessRequest, it never goes there.
public class DownloadHandler : IHttpHandler { public void ProcessRequest(HttpContext context) { //download stuff and break point } }
It never stops there, as mentioned. I also registered it in the web.config.
I am not sure about the path part of that entry. What do I have to enter there? I am downloading txt files, but the URL does not contain the filename, I somehow have to pass it to the handler. How would I do this? Session maybe?
I am a very new programmer.. A website is providing a lot of zip files that i needed. It will be updated/uploaded new zip files weekly. What I need to do is write a program/script to do auto downloading from the web weekly.. for example, this is the web link
http://www.google.com/googlebooks/uspto-patents-applications-yellowbook.html ( you can see a lot of zip files there )
so my question is What script i have to write(i got no experience in writing any script, so what can you suggest?) so i can download the zip file programmatically? then how should i make it to download the new zip file uploaded weekly?Is it i have to use DOM...unix? if yes, i will do some research on tat to make it work.
i created a website that allows the user to download a file from a ftp server.
i can get the file to download perfectly to a specific location on the clients pc but
my problem is that i cannot get the file to download to the default path or the browser or prompt the user to choose a location to save the file.
is there anyone who knows how i can either prompt the user to save the file in a location or even get the file to download to the browsers default downloads path
I am making a small file hosting website, and each user can upload multiple files, and will have access to just his files and can't access others files, for example by guessing the URL. Is there a way to secure files to have access by just the owner and no body else "may be website administrator also will have access"
I want to view the existing files in a directory which is "~/Images". Now the code below works fine and it shows the files (with its name and other details) in this directory very well in a data grid. The name is a hyperlink, but when I click on it, it tries to view the file in "~" (i.e current working directory) instead of "~/Images" and therefore reports the server error as - "file not found".
Also, how to implement if I want the save as option when I click on the file, so that I could save it directory locally instead of viewing it in browser?
VB Code-
Imports System.IO Partial Class uploaddoc Inherits System.Web.UI.Page Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load Dim dirInfo As New DirectoryInfo(Server.MapPath("~Images")) articleList.DataSource = dirInfo.GetFiles("*.gif") articleList.DataBind() End Sub End Class HTML (ASP.NET) Code - <%@ Page Language="VB" AutoEventWireup="false" CodeFile="uploaddoc.aspx.vb" Inherits="uploaddoc" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <%@ Import Namespace="System.IO" %> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title></title> </head> <body> <form id="form1" runat="server"> <div> <asp:DataGrid runat="server" id="articleList" Font-Name="Verdana" AutoGenerateColumns="False" AlternatingItemStyle-BackColor="#eeeeee" HeaderStyle-BackColor="Navy" HeaderStyle-ForeColor="White" HeaderStyle-Font-Size="15pt" HeaderStyle-Font-Bold="True"> <Columns> <asp:HyperLinkColumn DataNavigateUrlField="Name" DataTextField="Name" HeaderText="File Name" /> <asp:BoundColumn DataField="LastWriteTime" HeaderText="Last Write Time" ItemStyle-HorizontalAlign="Center" DataFormatString="{0:d}" /> <asp:BoundColumn DataField="Length" HeaderText="File Size" ItemStyle-HorizontalAlign="Right" DataFormatString="{0:#,### bytes}" /> </Columns> </asp:DataGrid> </div> </form> </body> </html>
When the customer presses a button to download a file, then a box come up on the screen asking the customer what he wants to do with the file, such as save or open.The entire filepath is written in this box. I would rather not have the file locations written out for all to see.Is it possible to modify the message in the box so that the entire filepath is not written out ?
I'm experiencing some strange behavior when using generic handler for downloading files from database to client using my web application.
Basically, everything works just fine in Chrome. But, when using Firefox the PDF documents don't get displayed entirely. Once downloaded to hard drive, they work fine. Excel documents get corrupted and users need to repair them in order to use them.
Below is the generic handler I use to download selected documents:
vb.net Code: Sub ProcessRequest(ByVal context As HttpContext) Implements IHttpHandler.ProcessRequest Dim documentID As Int32 If Not context.Request.QueryString("documentID") Is Nothing Then documentID = Convert.ToInt32(context.Request.QueryString("documentID"))
How to hide a open option while downloading files from Web page developed using asp.net C#.
My Exact need is ,
1.I will download a excel from my webpage ,there it s giving option to Open,Save,Cancel.
2.But i dont want to give option to open excel with out saving .Because if they give i am getting version compatibilty errors.Those are unsolved over a month,so ve decided to hide the open button.
For a church website I'm managing, there is a need to place audio files (sermons) on the website. There will be two categories of audio files; one will be a sample size of the audio file, around 5 minutes in length. The other will be the full-length of the sermon (30-50 +/- minutes).
I have decided the best setup would be to place the audio files on the server. I would then store the audio information, as well as the path to the audio file, in a database. I had thought about placing the audio files in the database as a BLOB, but it seemed inefficient. My concern, is with tools like Mozillza plug-in "Download Helper" , it is so easy to simply grab the media files off the server. This would not be a big deal, except we want to sell the full-length audio files. I am running ASP.NET 3.5 on IIS 7.
I am using an ASP.NET FileUpload to upload files to the server. How to upload it to the rootfolder of my project. I want to add the files to a collection or list of files to be shown on the webpage in the form of gridview. Each file should have a link to itself in the list So that it could be downloaded by the click-if desired. The gridview will also have a delete column so that I can delete any of the corresponding file-as desired.
downloading multiple files from the server side through the browser (i.e. Chrome) I've debbuged it the foreach iterates fine but it only downloads the first file.
Here's the code snippet:
FileInfo fInfo; SQLConnection = new SqlConnection(SQLConnectionString); foreach (CartItem CartProduct in Cart.Instance.Items) { [code].....
I have this following code for bringing page attachments to the user:
[code]...
The problem is that all supported files works properly (jpg, gif, png, pdf, doc, etc), but .docx files, when downloaded, are corrupted and they need to be fixed by Office in order to be opened.
At first I didn't know if the problem was at uncompressing the zip file that contained the .docx, so instead of putting the output file only in the response, I saved it first, and the file opened successfully, so I know the problem should be at response writing.
I have a small problem because when i click on my Button to export the excel data, i have a short waiting time (about 6 seconds) and i would like during this time displaying a progress bar. How to resolve this problem and implement the progress bar?
I have a web site using Forms Authentication that downloads a PDF file specific to the user from a page. On the development server I have it working fine, on the live server it checks to see if the file exists and fails (correctly) if it doesn't, but does not load the Dialog Box to save/open/cancel if it does exist. Any ideas ? There are no events logged, the code is as follows and by the way I have tried various combos of WriteFile/TransmitFile as per other forum posts - many combos seem to work on development machine(!!) but fail on live...
Dim fiPDF As New FileInfo(strReportPath) [code].... Exception message: The remote host closed the connection. The error code is 0x800703E3.
I want to secure folder of my website for example if some one do [URL] then it is giving access to mayur.doc which is in templocation folder of my website
I have an application that uses resource files to display items in multiple languages. My app uses quote a lot of javascript and the alerts need to display in the local language. To do this, I have created an http handler which will read the keys and values of the culture-specific resource file and write them to a JSON array which is then embedded in the page in a script tag, the messages can then be accesses using, for exmaple:
Message.Error (en-GB = "Error", fr-FR = "Erreur")
The messages http handler works great in development, however when I run the application on a test server, I get the error: Could not find any resources appropriate for the specified culture or the neutral culture. Make sure "Resources.Alerts.resources" was correctly embedded or linked into assembly "App_GlobalResources.b0n9j90e" at compile time, or that all the satellite assemblies required are loadable and fully signed. The code that I use to acccess the resource file is:
Where Resources.Alerts is the type that contains my multi-lingual definitions. The build action for the Alerts.resx file is set to "Embedded Resource". Any ideas why this works locally but not on my test server, am I missing something?
