Load an image from a url into a PictureBox

Question

I want to load an image into a PictureBox  This is the image I want to load  http   www gravatar com avatar 6810d91caff032b202c50701dd3af745 d identicon amp r PG  How do I do this

User · Accepted Answer

The PictureBox Load string url  method  sets the ImageLocation to the specified URL and displays the image indicated

User · Answer

Try this   var request   WebRequest Create  http   www gravatar com avatar 6810d91caff032b202c50701dd3af745 d identicon amp r PG     using  var response   request GetResponse    using  var stream   response GetResponseStream          pictureBox1 Image   Bitmap FromStream stream

User · Answer

Here s the solution I use   I can t remember why I couldn t just use the PictureBox Load methods   I m pretty sure it s because I wanted to properly scale  amp  center the downloaded image into the PictureBox control   If I recall  all the scaling options on PictureBox either stretch the image  or will resize the PictureBox to fit the image   I wanted a properly scaled and centered image in the size I set for PictureBox   Now  I just need to make a async version     Here s my methods       region Image Utilities           lt summary gt          Loads an image from a URL into a Bitmap object          Currently as written if there is an error during downloading of the image  no exception is thrown           lt  summary gt           lt param name  url  gt  lt  param gt           lt returns gt  lt  returns gt      public static Bitmap LoadPicture string url                System Net HttpWebRequest wreq          System Net HttpWebResponse wresp          Stream mystream          Bitmap bmp           bmp   null          mystream   null          wresp   null          try                       wreq    System Net HttpWebRequest System Net HttpWebRequest Create url               wreq AllowWriteStreamBuffering   true               wresp    System Net HttpWebResponse wreq GetResponse                 if   mystream   wresp GetResponseStream       null                  bmp   new Bitmap mystream                     catch                          Do nothing                       finally                       if  mystream    null                  mystream Close                 if  wresp    null                  wresp Close                       return  bmp                   lt summary gt          Takes in an image  scales it maintaining the proper aspect ratio of the image such it fits in the PictureBox s canvas size and loads the image into picture box          Has an optional param to center the image in the picture box if it s smaller then canvas size           lt  summary gt           lt param name  image  gt The Image you want to load  see LoadPicture lt  param gt           lt param name  canvas  gt The canvas you want the picture to load into lt  param gt           lt param name  centerImage  gt  lt  param gt           lt returns gt  lt  returns gt       public static Image ResizeImage Image image  PictureBox canvas  bool centerImage                  if  image    null    canvas    null                        return null                     int canvasWidth   canvas Size Width          int canvasHeight   canvas Size Height          int originalWidth   image Size Width          int originalHeight   image Size Height           System Drawing Image thumbnail               new Bitmap canvasWidth  canvasHeight      changed parm names         System Drawing Graphics graphic                        System Drawing Graphics FromImage thumbnail            graphic InterpolationMode   InterpolationMode HighQualityBicubic          graphic SmoothingMode   SmoothingMode HighQuality          graphic PixelOffsetMode   PixelOffsetMode HighQuality          graphic CompositingQuality   CompositingQuality HighQuality              ------------------ new code ---------------                Figure out the ratio         double ratioX    double canvasWidth    double originalWidth          double ratioY    double canvasHeight    double originalHeight          double ratio   ratioX  lt  ratioY   ratioX   ratioY     use whichever multiplier is smaller             now we can get the new height and width         int newHeight   Convert ToInt32 originalHeight   ratio           int newWidth   Convert ToInt32 originalWidth   ratio               Now calculate the X Y position of the upper-left corner              one of these will always be zero          int posX   Convert ToInt32  canvasWidth -  image Width   ratio     2           int posY   Convert ToInt32  canvasHeight -  image Height   ratio     2            if   centerImage                        posX   0              posY   0                    graphic Clear Color White      white padding         graphic DrawImage image  posX  posY  newWidth  newHeight               ------------- end new code ----------------             System Drawing Imaging ImageCodecInfo   info                            ImageCodecInfo GetImageEncoders            EncoderParameters encoderParameters          encoderParameters   new EncoderParameters 1           encoderParameters Param 0    new EncoderParameter System Drawing Imaging Encoder Quality                           100L            Stream s   new System IO MemoryStream            thumbnail Save s  info 1                             encoderParameters            return Image FromStream s               endregion   Here s the required includes    Some might be needed by other code  but including all to be safe   using System Windows Forms  using System Drawing Drawing2D  using System IO  using System Drawing Imaging  using System Text RegularExpressions  using System Drawing    How I generally use it    ImageUtil ResizeImage ImageUtil LoadPicture   http   someurl img jpg   pictureBox1  true

User · Answer

yourPictureBox ImageLocation    http   www gravatar com avatar 6810d91caff032b202c50701dd3af745 d identicon amp r PG

User · Answer

If you are trying to load the image at your form load  it s a better idea to use the code  pictureBox1 LoadAsync   http   google com test png      not only loading from web but also no lag in your form loading

[c#] Load an image from a url into a PictureBox

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