IE 8和9如果使用iframe，则尝试下载json响应

Question

I am using the blueimp fileUpload plugin to send files to the server and in ie 8 and ie 9 it tries to prompt me to download a file. When I open the file it is perfect json.

I have tried setting the content type to text/plain as well as the dataType to text/plain but to no avail.

I am using FubuMVC as well so I cant just return a string. If it is not json then it tries to render a view.

var obj = {
            dataType: 'json',
            contentType: "application/json",
            url: uploadUrl,
            formData: formData,
            start: function(e, data) {
                $('#' + loadingDiv).dialog('open');
            },
            stop: function(e, data) {
                $('#' + loadingDiv).dialog('close');
            },
            add: function(e, data) {
                data.formData = obj.formData;
                data.submit();
            },

            always: function(e, data) {
                alert('done');
            }
        };

        $('#' + div).fileupload(obj);

Answer 1

If your action method returns a string, the content type is set to text/plain , and the browser should display a string instead of trying to download a file.

Or you can use IHttpWriter in your action method.