Converting Image Object to Byte Array in C#

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Summary: Learn how to convert an image object to a byte array in C# for efficient manipulation and storage within your applications. This guide provides a straightforward approach to perform this conversion.
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When working with images in C, there may be scenarios where you need to convert an image object to a byte array. This conversion is commonly required for tasks such as storing images in a database, transmitting images over a network, or performing various image manipulation operations. In this guide, we'll explore a simple method to accomplish this task.

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Let's break down the code:

We create a class named ImageToByteArrayConverter to encapsulate the conversion logic.

Inside the class, we define a static method named ConvertImageToByteArray, which takes an Image object as input parameter.

Within the method, we first check if the input image is not null. If it's null, we throw an ArgumentNullException.

We then create a MemoryStream object to hold the image data.

Using the Save method of the Image class, we save the image to the memory stream. The RawFormat property is used to preserve the original format of the image.

Finally, we convert the contents of the memory stream to a byte array using the ToArray method and return it.

To use this converter, simply pass your Image object to the ConvertImageToByteArray method:

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Now you have a byte array representation of your image that you can manipulate, store, or transmit as needed within your C application.

That's it! You've learned how to convert an image object to a byte array in C. This straightforward approach can be very useful in various scenarios where dealing with image data is required.