CODEWITHSUNDEEP
c#asp.netimagebitmapcontrols
user2042023
user2042023

Reputation: 153

Is there anyway to display dynamically generated Bitmap on a asp image control?

In my code I create a bitmap dynamically, using c# and ASP.NET. Than I need to display it on the asp image control. There are anyway to do it whithout using handlers?

Upvotes: 14

Views: 25404

Answers (1)

nunespascal
nunespascal

Reputation: 17724

Using a ashx handler is better cause it works on all browsers and you can cache the output images on the client.

However if you must do it, images can be displayed inline directly using the <img>tag as follows:

<img src="data:image/gif;base64,<YOUR BASE64 DATA>" width="100" height="100"/>

ASPX:

<img runat="server" id="imgCtrl" />

CS:

MemoryStream ms = new MemoryStream();
bitmap.Save(ms, ImageFormat.Gif);
var base64Data = Convert.ToBase64String(ms.ToArray());
imgCtrl.Src = "data:image/gif;base64," + base64Data;

Yes, you could write the bitmap directly, but compressed formats(JPEG, GIF) are better for the web.

Note: Inline images don't work on older browsers. Some versions of IE had limitations of max 32KB size.

Upvotes: 29

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