Load Image Dynamically

[Mr.Cyber]

Hi, brothers :)

I'm rather novice in this area. I mean web programming and control building
and though.

I create UserControl:
public class ucParsedPNG : System.Web.UI.UserControl
{
... blah-blah-blah ...

}

My UserControl has to contain image and this one should be loaded
dynamically from a stream from C# code.

I have two files:
ucParsedPNG.ascx
ucParsedPNG.ascx.cs

I'v heard that in tag <IMG> in attribute <SRC> I can specify some script.
But all this I could do if I would use HTML. Now I'm trying to write in C#.
What exactly should I do now to achieve needed result.

All kind of help, hints, links and explanation will be highly appreciated!!!

A lot of thanks in advance!!!

[Gokhan Altinoren]

Hello Mr.Cyber,

A user control can manipulate the page's html output, add some tags etc.,
but cannot attach another resource other than pure html. In fact, HTML is
a text only world, where you define layout, content and resource references,
not the resource itself.

Having said that, your control can tell the page to look somewhere for a
specific image but it can't just output the image with the page.

Write another ascx or aspx, make them accept a parameter or two to get the
stream you are looking for, have it response the image into the response
stream, and add a reference to them in ucParsedPNG's output.

Something like <img src="foo.aspx?imgid=1">

....and somewhere in foo.aspx:

this.Response.Clear();
this.Response.ContentType = "image/png"; // not sure about the mime type
for png
imageFromStream.Save(this.Response.OutputStream, _type);
//...dispose as necessary

I guess it should be something like this. Hope this helps.

Gokhan Altinoren
gokhan[RMV_this][at]altinoren[also_RMV_this][dot]com
[url]http://altinoren.com[/url]

> Hi, brothers :)
>
> I'm rather novice in this area. I mean web programming and control
> building and though.
>
> I create UserControl:
> public class ucParsedPNG : System.Web.UI.UserControl
> {
> ... blah-blah-blah ...
> }
>
> My UserControl has to contain image and this one should be loaded
> dynamically from a stream from C# code.
>
> I have two files:
> ucParsedPNG.ascx
> ucParsedPNG.ascx.cs
> I'v heard that in tag <IMG> in attribute <SRC> I can specify some
> script. But all this I could do if I would use HTML. Now I'm trying to
> write in C#. What exactly should I do now to achieve needed result.
>
> All kind of help, hints, links and explanation will be highly
> appreciated!!!
>
> A lot of thanks in advance!!!
>

[ManojBhatt]

Hi,

I was reading your article and I would like to appreciate you for making it very simple and understandable. This article gives me a basic idea of Dynamically loading image in Image control in ASP.NET and it helped me a lot. I had found another nice post over the internet which also have a wonderful explanation on Dynamically loading image in Image control in ASP.NET.

Thank you very much for your precious post.