Convert Binary data to image, Save and retrieve image from binary data asp.net c#

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Online Converter Image to Base This article will help you to learn how we can convert an image into a base64 string and base64 string back to image. Online Converter Image to Base64 This article will help you to learn how we can convert an image into a base64 string and base64 string back to image.

Write imageBytes, 0, imageBytes. ToBase64String" when i compile it's underlined as an error. Visual C Kicks on Jan 13, Waqas on Feb 15, Webshop Winkelen on Apr 8, George on Apr 27, Is there a way to work with Convert. Kals on May 12, Scott McLellan on Jun 5, I've tried the following VB.

Net code with no success ToBase64String byteArray, 0 byteArray. Nipun on Jun 9, Mohit Gupta on Jun 9, Scott McLellan on Jun 10, Jpeg ; return ms. Karthic on Aug 23, Cappie on Sep 30, Raag on Oct 19, Jack on Oct 20, Raka osiana on Nov 2, Jitu on Nov 13, TiTo on Feb 3, Jorge on Mar 11, Patrickc on Apr 8, Carrie on May 4, I'm very new for this area but now a project needs this part immediately. DeeJay on Jun 3, Thanks Alot Rupesh Prasad.

Anthony on Jul 23, This applies for all situations where serializability is important, as a string is much easier to serialize than complex types such as an image.

Anyway, thanks for this great code, once again! Rakesh on Aug 2, Asif on Aug 20, Abid on Aug 25, Saurabh on Sep 22, Is there a way to confirm if the data I receive is the encoded form of the image and no other format.

If they encode the text and send it to me then my code fails as I try to save it in TIFF format and transmit it. Is there any header in the encoded data that tells if the encoded data is was image. Shiva on Sep 28, Can any one help. What I am doing is: Server is able to decode. But the image is different. That means some thing is wrong. At Java end they are directly converting base64 string to image Please any one help me in this issue. Arabind on Oct 12, Buddhi on Nov 24, Buddhi from Sri Lanka Das Khatri on Feb 11, I'm new to j2me, I'm receiving base64 in output of a request from web-service CI'm not able to process it.

How can I convert this base64 to a image. Rob Johnson on Feb 16, Although you dont need the below line when converting back to an image: Length ; Alternate implementation: Chat on Mar 3, Joey Joya on Apr 11, Sri on Jul 19, If we have more than one image in a jpg image then how can we recognise the images. Bala on Sep 2, I was searching this for very long time and your solution worked like a charm!!

George Justice Coin on Sep 5, Just have to figure out how to use the code now. Have an offline web app that I need to do this with so server side code is not an option. I can successfully convert the base64string. JMarco on Sep 12, I need it badly.

Thanks for the helpful idea. Searock on Sep 30, Master coder on Oct 17, Akshay on Nov 22, Eric on Nov 22, Mariano on Dec 20, Xusan on Mar 31, Iva on Apr 3, How can I save this image in the database?

SWA on Apr 23, KumarAbhishek on Apr 25, Philip on Jun 3, Appreciated as you steered me in the right direction: How can i do that. Thanks in advance Mohsinkhan. ImageFormat format " function from console application using c.

Jenna on Sep 12, Kedar on Oct 11, Nagendra on Oct 11, Uvoh Gift on Feb 26, Ripon on Jun 4, Check out there website. Zho on Oct 26, Lucky on Nov 25, I am converting image files to base64string.

M on Jan 8, It help for our purpose Rula on Jan 14,

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Have you ever wondered what Base64 is? Why you need it? Have you ever wanted to write your own Base64 encoder? Base64 is a common way to convert binary data into a text form. This is commonly used to store and transfer data over media that was designed to store and transfer only text, such as including an image in an XML document.

It works by converting the data into a base representation and displaying it using a common character set. The goal is to use a common set of characters that can be represented in most encoding schemes. It works by grouping the bits of the data into chunks 24 bits, treating those as 4 chunks of 6 bits sextets , converting each sextet into base10 and looking up the corresponding character for that decimal number.

A single 24 bit string is represented by 4 encoded characters. For instance, to start encoding the first 3 characters of my name we first have to convert the letters into bytes, and the bytes into bits.

The byte representations for Dav are:. Those numbers, written in 8 bit binary, are , , and respectively. Group those together to form a 24 bit string and you get Next, grab 4 sextets of bits, convert those to decimal and look up the corresponding character in the index table.

Looking those up in the index table gives the string RGF2. We just converted to Base64! But wait… we have a problem. This is where padding comes in. We know that Dav is encoded as RGF2 so we just need to encode the last letter, e. If we attempt to get our sextet groupings out of that, we get and That last sextet is missing a few bits.

What we need to do is pad the last sextet with 0 and note that we have 2 octects missing. That leaves us with and , which are 25 and 16 , which are Z and Q.

NET comes with a respectable Base64 converter. This is a learning exercise. ToBase64String method in the System namespace takes a byte[] as a parameter and returns a string.

The good part about the method taking a byte[] parameter is that part of the work is already done for you — getting the byte representation of your data.

We could use one of the Convert. NET, or we could use the one we wrote ourselves! Now that we have our data represented as binary, we need to grab bit chunks at a time. Note that we loop while octectsTaken is less than the length. This will allow us to loop through the end of the string, regardless of whether or not we have full 24 bit chunks. Next we go sextet by sextet, convert the binary to a byte and look it up in the table. We're making use of another LINQ method, Aggregate , which is basically a fancy way of joining the bits into a string again.

If we check the remainder of the length of the full bit string divided by 3, that will tell us how many padding characters are required.