Convert Base64 String to Bitmap or Image Xamarin or Android
14,701
Solution 1
Base64 to Bitmap :
public Bitmap Base64ToBitmap(String base64String)
{
byte[] imageAsBytes = Base64.Decode(base64String, Base64Flags.Default);
return BitmapFactory.DecodeByteArray(imageAsBytes, 0, imageAsBytes.Length);
}
Bitmap to Base64 :
public String BitmapToBase64(Bitmap bitmap)
{
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
bitmap.Compress(Bitmap.CompressFormat.Png, 100, byteArrayOutputStream);
byte[] byteArray = byteArrayOutputStream.ToByteArray();
return Base64.EncodeToString(byteArray, Base64Flags.Default);
}
Solution 2
Image to Base64 String, online conversion - here
public string ImageToBase64(Image image,
System.Drawing.Imaging.ImageFormat format)
{
using (MemoryStream ms = new MemoryStream())
{
// Convert Image to byte[]
image.Save(ms, format);
byte[] imageBytes = ms.ToArray();
// Convert byte[] to Base64 String
string base64String = Convert.ToBase64String(imageBytes);
return base64String;
}
}
Base64 String to Image, online conversion - here
public Image Base64ToImage(string base64String)
{
// Convert Base64 String to byte[]
byte[] imageBytes = Convert.FromBase64String(base64String);
MemoryStream ms = new MemoryStream(imageBytes, 0,
imageBytes.Length);
// Convert byte[] to Image
ms.Write(imageBytes, 0, imageBytes.Length);
Image image = Image.FromStream(ms, true);
return image;
}
Solution 3
I'm assuming that your encoded data is some bitmap format? If so, you should be able to do something like this:
public Bitmap Base64ToImage(string base64String)
{
// Convert base 64 string to byte[]
byte[] imageBytes = Convert.FromBase64String(base64String);
// Convert byte[] to Image
using (var ms = new MemoryStream(imageBytes, 0, imageBytes.Length))
{
Bitmap image = BitmapFactory.FromStream(ms, true);
return image;
}
}
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Author by
Joewy Lombe
Updated on June 04, 2022Comments
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Joewy Lombe almost 2 years
I'm trying to convert a Base64 string to an image and set ImageView using the same image. I know how to get it done in java, but I'm having a trouble in C#. Anyone have an idea of how to get it done in C#?
Some of the code I've tried;
public Image Base64ToImage(string base64String) { // Convert base 64 string to byte[] byte[] imageBytes = Convert.FromBase64String(base64String); // Convert byte[] to Image using (var ms = new MemoryStream(imageBytes, 0, imageBytes.Length)) { Image image = Image.FromStream(ms, true); return image; } }
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Joewy Lombe almost 8 yearsHi, Vishwesh I've tried this code, i get the following error ; 'Image' does not contain a definition for 'FromStream' . Im using Visual Studio 2015 By the way.
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Vishwesh Jainkuniya almost 8 years
MemoryStream ms = new MemoryStream(imageBytes);
is enough. You don't need toWrite
to it. In this form, you must also set the position to 0 before passing to FromStream