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?
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!
