IE尝试下载JSON在ASP。 NET MVC 3 [英] IE tries to download JSON in ASP. NET MVC 3

问题描述

我想从我的行动返回JSON后，IE浏览器试图下载它，并给我保存对话框。
我测试了它在Firefox，并且有它工作正常。

I was trying to return Json from my action and after that IE tried to download it and showed me save dialog. I tested it in Firefox, and there it works fine.

return Json(new { success = false, message = ex.Message }, "application/json");

什么是行为的原因，如何解决这个问题？

What is the reason of that behavior and how can I solve that issue?

之后，在Javascript部分我试试这个

After that in Javascript part I try this

 if (responseJSON.success == false) {
                        alert(responseJSON.message);
                        cancel();
                    }

不过，IE浏览器不会自动显示警告反正。它带给我保存对话框。

But IE doesn't show alert anyway. It brings me save dialog.

我试图改变应用/ JSON与text / plain的和保存对话框消失，但我无法看到的警报呢。我缺少什么？

I tried to change "application/json" with "text/plain" and save dialog disappeared, but I am not able to see alert yet. What am I missing?

编辑：

下面是我编造的Javascript，我使用Valums qquploader（前Ajaxupload）用于上传图片

Here is my complect Javascript, I am using Valums qquploader(ex-Ajaxupload) for uploading images

 var uploader = new qq.FileUploader({
                element: document.getElementById("image-upload"),
                action: '/Home/ImageUpload',
                allowedExtensions: ['jpg', 'png', 'gif'],
                sizeLimlit: 2048,onComplete: function (id, fileName, responseJSON) {
                    if (responseJSON.success == false) {
                        alert(responseJSON.message);
                        cancel();
                    }
                    else {
                         alert("success");
                          //some code here
                        }
                     }
                   });

我曾与测试警报（成功）; 在我的其他部分并转发JSON作为text / plain的之后，我看到了警报。但是，在那个时候 responseJSON.success！= FALSE 我。你有什么建议有关？

I had tested with alert("success"); in my else part and forwarded json as "text/plain" and after that I saw the alert. But in that time responseJSON.success != false for me. Have you any suggestions about that?

推荐答案

我已经解决了这一招。

return Json(new { success = false, message = ex.Message }, "text/html");

和现在的作品。但我任何人解释为什么它的text / html的作品，并没有与应用/ JSON和text / plain的工作。首先是试图下载JSON和第二为JSON场返回未定义的属性。

And now it works. But can me anyone explain why it works with text/html, and didn't work with application/json and text/plain. First is trying to download JSON and second is returning undefined properties for JSON fields.

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