binary string to image? RSS

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  eladc

  Member

  32 Points

  89 Posts

  binary string to image?

  May 07, 2012 12:13 PM|LINK

  foreach (XmlNode customer in customerlist.SelectNodes("Customer"))
                  {
                      first_name = customer.SelectSingleNode("CustomerFirstName").InnerXml;
                      last_name = customer.SelectSingleNode("CustomerLastName").InnerXml;
                      total_orders = customer.SelectSingleNode("CustomerOrders").InnerXml;
                      user_image = Convert.FromBase64String(customer.SelectSingleNode("CustomerPhoto").InnerXml);
  
                      output.Text += "\n  <tr>";
                      output.Text += "\n   <td><img src=\"photo.png\"></td>";
                      output.Text += "\n   <td>" + first_name + "</td>";
                      output.Text += "\n   <td>" + last_name + "</td>";
                      output.Text += "\n   <td>" + total_orders + "</td>";
                   }

  how do i use the variable user_image (of type byte[]) to display the user image ??

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  cninjas

  Contributor

  4868 Points

  851 Posts

  Re: binary string to image?

  May 07, 2012 12:26 PM|LINK

  hi

  Can you try this function to convert to byte array

  // C# to convert a string to a byte array.
  public static byte[] StrToByteArray(string str)
  {
  System.Text.UTF8Encoding encoding=new System.Text.UTF8Encoding();
  return encoding.GetBytes(str);
  }
  and pass the byte array for generating the image
  public static Image CreateImage(byte[] imageData)
  {
  Image image;
  using (MemoryStream inStream = new MemoryStream())
  {
  inStream.Write(imageData, 0, imageData.Length);

  image = Bitmap.FromStream(inStream);
  }

  return image;
  }

  Hope it helps,thanks.

  Microsoft Community Contributor 2011
  Niranjan
• • Reply
  

  eladc

  Member

  32 Points

  89 Posts

  Re: binary string to image?

  May 08, 2012 08:03 AM|LINK

  the public static image gives me this error

  Error 1 'Image' is an ambiguous reference between 'System.Web.UI.WebControls.Image' and 'System.Drawing.Image'

  edit:

  i got it to work .. my code had both 'System.Web.UI.WebControls.Image' and 'System.Drawing.Image'

  .. any way now that it's working..

  im getting back an image type how do i use it as an html image src?

  • Edited by eladc on May 08, 2012 08:24 AM
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  cninjas

  Contributor

  4868 Points

  851 Posts

  Re: binary string to image?

  May 08, 2012 09:53 AM|LINK

  hi

  try the below code for generating the image from byte array and assign the generated image to the control.

  private void byteArrayToImage(byte[] byteArrayIn)
      {
          System.Drawing.Image newImage;
   
          string strFileName = GetTempFolderName() + "yourfilename.gif";
          if (byteArrayIn != null)
          {
              using (MemoryStream stream = new MemoryStream(byteArrayIn))
              {
                  newImage = System.Drawing.Image.FromStream(stream);
   
                  newImage.Save(strFileName);
   
                  img.Attributes.Add("src", strFileName);
              }
   
              lblMessage.Text = "The image conversion was successful.";
          }
          else
          {
              Response.Write("No image data found!");
          }
      }

  hope it helps.thanks,
  
  

  Microsoft Community Contributor 2011
  Niranjan
  • Marked as answer by decker dong - msft on May 13, 2012 01:46 AM
• • Reply
  

  eladc

  Member

  32 Points

  89 Posts

  Re: binary string to image?

  May 08, 2012 10:45 AM|LINK

  what's that ?

  GetTempFolderName()

• • Reply
  

  cninjas

  Contributor

  4868 Points

  851 Posts

  Re: binary string to image?

  May 08, 2012 11:35 AM|LINK

  hi

  that is the function tat returns the path of the tempfoldername. Just return a string showing the path of the folder where you want to save the  image.

  Microsoft Community Contributor 2011
  Niranjan
  • Marked as answer by decker dong - msft on May 13, 2012 01:46 AM