Currently, I have a project that is using the HTML 4 upload control within an IFRAME (to get some sort of async processing when uploading a file to a database – before the advent of the AJAX upload control).
A strange thing occurs when the user’s browser is set to Standards Mode for IE10-11. When the SRC tag of the IFRAME is programmatically changed on page load or post back any CSS (external CSS files) in the parent page containing “background-color” get removed from the page once the IFRAME loading is complete . As it only occurs with IE in standards mode (IE7,Chrome, Firefox no issues), I’ve chalked it up to browser bug that will like never get addressed.
Anyway, I was trying to work with the AjaxUpload control (framework 3.5) so I could do away with the IFRAME. Is there any way to change the temp directory the control uses to process the file? By default it wants to use what Windows environment says (System.IO.Path.GetTempPath()). This will not work when an application uses forms authentication when the web.config has
<deny users="?"/>
I do not see any control properties that allow me to set the path to be relative to the application. Ideally this should all be done in memory without the need for a temp file location, but that doesn’t appear to be the way the Ajax control is designed for this framework.
Your input would be much appreciated. If anyway knows how to address the CSS breaking issue, I’m willing to work that route too.