How to Convert an Image File Path to a Base64 String in C#?

Convert Image to Base64 String

Converting an image to a base64 string allows you to embed images within other data, such as HTML or JavaScript. In this context, we'll explore how to convert an image from a file path to a base64 string in C#.

Solution:

To convert an image to a base64 string in C#, follow these steps:

1. Load the image from the file path: Use the Image.FromFile method to load the image from the specified path.
2. Create a memory stream: Use a MemoryStream to store the image in memory.
3. Save the image to the memory stream: Call the Save method on the image and pass in the memory stream as the destination.
4. Retrieve the image bytes: Convert the memory stream to a byte array using the ToArray method.
5. Convert the byte array to a base64 string: Use the Convert.ToBase64String method to encode the byte array into a base64 string.

Code Example:

using System;
using System.Drawing;
using System.IO;

namespace ImageToBase64
{
    class Program
    {
        static void Main(string[] args)
        {
            string path = @"C:\Users\User\Documents\test.jpg";

            // Create a data URI
            string base64String = ToBase64(path);
            Console.WriteLine(base64String);
        }

        /// <summary>
        /// Converts an image to a base64 string.
        /// </summary>
        /// <param name="path">The file path of the image.
        /// <returns>A base64 string representing the image.</returns>
        public static string ToBase64(string path)
        {
            using (Image image = Image.FromFile(path))
            {
                using (MemoryStream m = new MemoryStream())
                {
                    image.Save(m, image.RawFormat);
                    byte[] imageBytes = m.ToArray();
                    string base64String = Convert.ToBase64String(imageBytes);
                    return base64String;
                }
            }
        }
    }
}

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