How to convert a byte array into an image?

Question

Using Javascript, I'm making an AJAX call to a WCF service, and it is returning a byte array. How can I convert that to an image and display it on the web page?

Answer 1

I realize this is an old thread, but I managed to do this through an AJAX call on a web service and thought I'd share...

• I have an image in my page already:

   <img id="ItemPreview" src="" /> 

• AJAX:

  $.ajax({         type: 'POST',         contentType: 'application/json; charset=utf-8',         dataType: 'json',         timeout: 10000,         url: 'Common.asmx/GetItemPreview',         data: '{"id":"' + document.getElementById("AwardDropDown").value + '"}',         success: function (data) {             if (data.d != null) {                 var results = jQuery.parseJSON(data.d);                 for (var key in results) {                     //the results is a base64 string.  convert it to an image and assign as 'src'                     document.getElementById("ItemPreview").src = "data:image/png;base64," + results[key];                 }             }         }     }); 

My 'GetItemPreview' code queries a SQL server where I have an image stored as a base64 string and returns that field as the 'results':

     string itemPreview = DB.ExecuteScalar(String.Format("SELECT [avatarImage] FROM [avatar_item_template] WHERE [id] = {0}", DB.Sanitize(id)));      results.Add("Success", itemPreview);      return json.Serialize(results); 

The magic is in the AJAX call at this line:

     document.getElementById("ItemPreview").src = "data:image/png;base64," + results[key]; 

Enjoy!