In the IE 9 browser, when the uploaded file details are returned in the upload handler as JSON data. The browser will prompt to download the JSON as a file. This will prevent the successful operation.
To overcome this issue in the Uploadbox control, modify the Content-Type for the returned JSON as “text/html” in the Save Handler method in the server-side. Kindly refer to the following code.
Now, the JSON data can be accessed in the client-side complete handler.
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