How to Convert a Base64 String to an Image and Save It?

Converting a Base64 String to an Image and Saving It

When working with Base64-encoded images, it can be challenging to convert them into actual image files. To address this, let's explore a modified code snippet that effectively converts a Base64 string into an image and saves it for storage:

protected void SaveMyImage_Click(object sender, EventArgs e)
{
    string imageUrl = Hidden1.Value;
    string saveLocation = Server.MapPath("~/PictureUploads/whatever2.png");

    HttpWebRequest imageRequest = (HttpWebRequest)WebRequest.Create(imageUrl);
    WebResponse imageResponse = imageRequest.GetResponse();

    Stream responseStream = imageResponse.GetResponseStream();
    byte[] imageBytes;

    using (var br = new BinaryReader(responseStream))
    {
        var imageString = br.ReadString();
        imageBytes = Convert.FromBase64String(imageString);
    }

    responseStream.Close();
    imageResponse.Close();

    Image image = Image.FromStream(new MemoryStream(imageBytes));

    FileStream fs = new FileStream(saveLocation, FileMode.Create);
    image.Save(fs, ImageFormat.Png);
    fs.Close();
}

In this modified code:

1. Base64 Conversion: We extract the Base64 string from the response stream using br.ReadString().
2. Image Object Creation: We convert the Base64 string into a byte array, which is then used to create an Image object.
3. Image Saving: Instead of writing the raw bytes to a file, we save the image object directly to the desired location using image.Save(). This ensures the image is saved in the specified format (PNG in this case).

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