Convert an image selected by path to base64 string

Question

How do you convert an image from a path on the user s computer to a base64 string in C   For example  I have the path to the image  in the format C  image 1 gif  and would like to have a data URI like data image gif base64  9j 4AAQSkZJRgABAgEAYABgAAD   representing the 1 gif image returned

User · Answer

Since most of us like oneliners   Convert ToBase64String File ReadAllBytes imageFilepath      If you need it as Base64 byte array   Encoding ASCII GetBytes Convert ToBase64String File ReadAllBytes imageFilepath

User · Answer

Get the byte array  byte    representation of the image  then use Convert ToBase64String    st  like this  byte   imageArray   System IO File ReadAllBytes   quot image file path quot    string base64ImageRepresentation   Convert ToBase64String imageArray    To convert a base64 image back to a System Drawing Image  var img   Image FromStream new MemoryStream Convert FromBase64String base64String

User · Answer

Try this  using  Image image   Image FromFile Path         using  MemoryStream m   new MemoryStream                  image Save m  image RawFormat           byte   imageBytes   m ToArray                Convert byte   to Base64 String         string base64String   Convert ToBase64String imageBytes           return base64String

User · Answer

You can convert it like this    string test     C  image 1 gif     byte   bytes   System Text ASCIIEncoding ASCII GetBytes test     string base64String   System Convert ToBase64String bytes     Console WriteLine  Base 64 string      base64String     Output    QzovaW1hZ2UvMS5naWY

User · Answer

That way it s simpler  where you pass the image and then pass the format   private static string ImageToBase64 Image image        var imageStream   new MemoryStream        try                          image Save imageStream  System Drawing Imaging ImageFormat Bmp           imageStream Position   0          var imageBytes   imageStream ToArray            var ImageBase64   Convert ToBase64String imageBytes           return ImageBase64            catch  Exception ex                return  Error converting image to base64              finally             imageStream Dispose

User · Answer

Based on top voted answer  updated for C  8  Following can be used out of the box  Added explicit System Drawing before Image as one might be using that class from other namespace defaultly   public static string ImagePathToBase64 string path        using System Drawing Image image   System Drawing Image FromFile path       using MemoryStream m   new MemoryStream        image Save m  image RawFormat       byte   imageBytes   m ToArray        tring base64String   Convert ToBase64String imageBytes       return base64String

User · Answer

The following piece of code works for me   string image path  physical path of your image   byte   byes array   System IO File ReadAllBytes Server MapPath image path    string base64String   Convert ToBase64String byes array

User · Answer

Something like that   Function imgTo64 ByVal thePath As String  As String     Dim img As System Drawing Image   System Drawing Image FromFile thePath      Dim m As IO MemoryStream   New IO MemoryStream        img Save m  img RawFormat      Dim imageBytes As Byte     m ToArray     img Dispose        Dim str64   Convert ToBase64String imageBytes      Return str64 End Function

User · Answer

This is the class I wrote for this purpose   public class Base64Image       public static Base64Image Parse string base64Content                if  string IsNullOrEmpty base64Content                         throw new ArgumentNullException nameof base64Content                       int indexOfSemiColon   base64Content IndexOf      StringComparison OrdinalIgnoreCase            string dataLabel   base64Content Substring 0  indexOfSemiColon            string contentType   dataLabel Split      Last             var startIndex   base64Content IndexOf  base64    StringComparison OrdinalIgnoreCase    7           var fileContents   base64Content Substring startIndex            var bytes   Convert FromBase64String fileContents            return new Base64Image                       ContentType   contentType              FileContents   bytes                       public string ContentType   get  set         public byte   FileContents   get  set         public override string ToString                 return   data  ContentType  base64  Convert ToBase64String FileContents              var base64Img   new Base64Image      FileContents   File ReadAllBytes  Path to image       ContentType  image png       string base64EncodedImg   base64Img ToString

User · Answer

You can easily pass the path of the image to retrieve the base64 string  public static string ImageToBase64 string  imagePath                string  base64String   null           using  System Drawing Image  image   System Drawing Image FromFile  imagePath                         using  MemoryStream  mStream   new MemoryStream                                   image Save  mStream   image RawFormat                   byte    imageBytes    mStream ToArray                     base64String   Convert ToBase64String  imageBytes                    return  data image jpg base64      base64String                                  Hope this will help

User · Answer

You can use Server Map path to give relative path and then you can either create image using base64 conversion or you can just add base64 string to image src    byte   imageArray   System IO File ReadAllBytes Server MapPath    Images Upload Image png      string base64ImageRepresentation   Convert ToBase64String imageArray

[c#] Convert an image (selected by path) to base64 string

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