I am using ashx to serve images from a database, is there anyway to have a user click on a link that allows them to download the file on the computer. (IE it shows the Save Dialog) Like you download a file.
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i am having one image and Show high Resolution image on the same page...
now i am opening the new window and showing the big image in that window...
but now instead of opening the new window and showing the image i have to give download Image option to the user..
In a basic scenario where I have a GridView with files to download and link buttons to download them, is there any benefit at all for creating a custom http handler for streaming those files as opposed to simply streaming from the event handler of the download link button?
Edit: As some suggested code reuse would favor the handler, however it's not an issue in this particular case. The handler is also faster being that it avoids the page life cycle, however this slight performance improvement is probably not worth creating a handler for in my particular situation. The only thing that comes to mind now is (assuming using the same aspx page approach) whether there is any special consideration in a situation where the GridView is inside an UpdatePanel?
implemented a generic handler in my application which works great for images, but when I manually type the handler URL in the browser with the image's querystring it prompts download instead of displaying. Here is my code:
public void ProcessRequest(HttpContext context)
{
if (this.FileName != null)
{
[code]...
We have a whole bunch of WML pages that are served out using ASHX files and we've had no problems with them. However, someone has just got a Windows 7 Phone and when they browse to one of these pages they get:
Can't download file! Windows Phone doesn't support .ashx files Is there some IIS configuration that we need to do to make this work?
I've been trying to use the jQuery plugin Colorbox to display images I have in my DB through an ashx file. Unfortunately it just spits a bunch of gibberish at the top of the page and no image. Can this be done? Here is what I have so far:
$(document).ready
(
function ()
{
$("a[rel='cbImg']").colorbox();
}
);
...
<a rel="cbImg" href="HuntImage.ashx?id=15">Click to see image</a>
UPDATE:
My ashx file is writing the binary out:
context.Response.ContentType = "image/bmp";
context.Response.BinaryWrite(ba);
I have a simple 'file download' generic handler which sets the response contenttype and headers before sending the file through the same response.
I also have Response.Cache.SetCacheability(HttpCacheability.server) set in the global.asax.
As I have noticed from various sources, Internet Explorer doesn't like this no-cache setting and gives an error when trying to download the file (requested site unavailable or cannot be found).
I thought maybe I could override this setting in the .ashx page, so I alter the response's cacheability setting to public. This did not solve the issue. removing the line from global.asax does solve the problem but obviously affects the whole site.
Is there a way of setting the cachability just for my generic handler?
I've created code to retrieve an image from the file system using an ASHX handler. The code displays the image correctly in Chrome, but I get a broken image in IE:
[Code]....
I am developing an application that stores images as Base64 strings in xml files. I also want to allow the user to crop the image before saving it to the file, preferably all in memory without having to save a temp file, and then delete it afterwards. In order to display the newly uploaded image, I need to create a HTTP handler that I can bind the asp:Image to. The only examples for doing this online require passing the .ashx an ID and then pulling the image from a DB or other data store. Is it possible to somehow pass the raw data to the .ashx in order to get back the image?
View 3 RepliesI got a $(document).ready() handler in my aspx page that fires twice. I trapped it to the follwing line of html (this line is part of the itemtemplate of a listview):
<img src='Images.ashx?Url=<%# Eval("Url")%>&Type=3' alt=''></img>
Seems that using the images.ashx is causing my problem, putting a 'normal' url as src gives me no problems.
It must be because the handler is called, but why is loading an image giving a second fire on $(document).ready()
It is only in IE8. Chrome, FF and safari work as expected.
how one would download an image file into an image control in asp.net using ftp?
View 1 Repliesi am having 2 imagebuttons a gridview and a button. Now if i clicked on Image button i will show a grid. Now under button click i would like to capture which image button was clicked if 1st image button is clicked i would like to some values and if 2nd one is clicked i would like to show another
View 2 RepliesIs there any way i can download image using asp.net
I want to dialog box opened to save it
1) How to download an image from a website and save it in my asp .net project folder; I tried the following which does not work.
WebClient Client = new WebClient();
byte[] image; Client.UploadData("http://www.freeiconsweb.com/Freeicons/3D_food_icons/orange.png", image);
I get compile error like: Use of unassigned local variable 'image'
And I am trying to make the tutorial work at: [URL]
2) How to download a gif image and then convert to jpg and save it in my client/image or in my project folder.
i want to download image from an asp.net page.
there is one option that we have do
<a href="imagepath" target="_blank" >Download</a>
with this image open in new window and from there we can save image through saveas option.
but i want download image not with save as option.
foe eg. in gmail attached images can be downlaod. nd i want this option.
I tried this method:
string alteredname = "/store/" + filenames;
string filepath = Server.MapPath(alteredname);
FileInfo file = new FileInfo(filepath);
Response.AddHeader("Content-Disposition", "Attachment;FileName:" + file.Name);
Response.AddHeader("Content-Length", file.Length.ToString());
Response.ContentType = "APPLICATION/OCTET-STREAM";
Response.Flush();
Response.TransmitFile(file.FullName);
Response.End();
but the downloaded file is losing extension. I am getting the file in the name of the page form which I am downloading.
I am using visual studio 2005, asp.net, c# to develop a web site.
In my web site home page, I add a menu item "Download Update", when user clicks on it, a login page will display, if user types in a correct username and password, then I would like to start the update download automatically, rathen than display a another download page and ask user to click on some link text to start the download.
I used updateProgress for Downloading File on button click.
it works but when downloading Completes, progress bar did not disappears.
So, I would like to enable user to perform some download function for image.
I'm storing the image to the database as binary data by the way.
how to download that image?
I want to upload image in database and when it upload it should display in gridview and i can download it How can i do it.
View 7 RepliesWe are using asp.net and c#3.5 implementing a website using quite a lot of jQuery. We would like to download an img from the browser window, but (and here's the trick) in a button click (in addition to right click save as)...
Before we get into it, I should state that we know that this is an img tag and from the front end, we can easily download the image using right click save as. The only reason we wish to download the image from a (say) button click is because across the site we have download buttons for downloadable content (like datatable to excel files and pdfs, etc) and we would preferably like to keep the standard across thewebsite.
We are producing graphs using Microsoft Chart Control which renders the graphs to the screen pretty well. This renders an image to the screen as shown below in an example (using Firebug)
<div align="center" style="margin-top: 30px; margin-bottom: 30px;" id="graph">
<img style="border-width: 0px; height: 500px; width: 465px;" alt="Chart Loading" src="/Telma.UI/ChartImg.axd?i=chart_194e3c04c11240a7b7fba3e3e1d76d39_2.jpeg&g=338b984aaab84b1da9a63db3150211e2" borderdashstyle="Solid" id="ctl00_Chart1">
</div>
The img tag is generated from the Chart Control which in the asp is in an <asp:Chart> tag.
Now as an important side note we have in the web.config
<add key="ChartImageHandler" value="storage=session;privateImages=true;timeout=10;deleteAfterServicing=false;WebDevServerUseConfigSettings=true;" />
There is a known bug with MS Chart Control that if you store the image in session variables or memory, that the image is only accessible once and not persisted. Described here
We don't have a physical location for the image when it is created (and most often the Chart Control destorys the image).
What we need is some client side method of downloading this image content from the screen as it is rendered, but without having access to the physical image at the back end. We do not want to use the chart control property:
ImageStorageMode="UseImageLocation"
I´m trying to download a google chart image using the next code:
[Code]....
but I have a problem. Sometime the chart is not downloaded complete. Is there any error in the code above?
I am trying to implement a service to download a image file. The code does nothing but upload a file to the response with each client request.
There are no SOAP messages involved but I am planning to implement it as ASP.NET web service. It can also be implement as ASP.NET website but since it has no view (forms, html etc) I planned to implement a web-service.
I am trying to download an external image and encode it, using the function below.
[code]....
I have created an ashx handler to render image thumbnails from images in a mysql database. If a file name is passed through querystring, the content disposition filename is set (when user clicks "save as..." the filename appears). The images appear properly and the filename appears when user selects "save as..." but the filetype is listed as unknown and the file that downloads has no type. I have tried adding ".jpg" to the end of the filename in content disposition for lack of anything else to try, but this made every image download as untitled.bmp.
[Code]...
