Question

我有一个服务器方法，它接受并编码一个字符串列表，因为IE9不读取json格式，我想要的是在http响应消息的内容中设置字符串。我似乎做得很好但是当我得到响应时，我可以在身体上找到响应，我能看到的只是我在响应消息中设置的长度。

这是代码：

public HttpResponseMessage Upload()
    {
        HttpResponseMessage m = new HttpResponseMessage(HttpStatusCode.OK);
        List<string> returnlist = new List<string>();
        for (int i = 0; i < Request.Files.Count; i++)
        {
                   //string treatment        
        }

        HttpResponseMessage response = new HttpResponseMessage();

        response.Content = new StringContent(string.Join(",", returnlist));
        return response;
    }

这是字符串包含“file1，file2，file3”的内容但我无法在visual studio或firebug中找到它进行调试

我得到的回应是：

StatusCode: 200, ReasonPhrase: 'OK', Version: 1.1, Content: System.Net.Http.StringContent, Headers:

{
  Content-Type: text/plain; charset=utf-8
}

如何设置然后获取响应消息？

如果需要，这里的js是：

self.uploadfiles = function () {
        //startSpinner();

        if (!self.isOldIE()) {
            var loc = window.location;
            base_url = loc.protocol + "//" + loc.host;
            baseUrl = base_url + "/";

            var save = true;

            var xhr = new XMLHttpRequest();
            xhr.open('POST', baseUrl + 'Home/Upload');
            xhr.send(formdata);
            xhr.onreadystatechange = function (data) {
                //The responseText is the same as above
                if (xhr.responseText.length > 0) {  

                   //do stuff
      }
    };

Answer 1

尝试使用Javascript获取响应：

var xhr = new XMLHttpRequest();

xhr.open('POST', baseUrl + 'Home/Upload', true);
xhr.onreadystatechange = function() {

    if (xhr.readyState === 4 && xhr.status === 200)  { 
        alert(xhr.responseText);
    } else {
        // do something about the error
    }
};
xhr.send(formdata);

注意 open（）方法的第三个布尔参数，用于异步获取。

Answer 2

试试此代码

        var response = Request.CreateResponse(HttpStatusCode.OK, string.Join(",", returnlist));
        return response;

Answer 3

由于某种原因，浏览器不显示http响应的整个主体。所以我的解决方案是编写响应的头部并从js获取头部。也许有人知道为什么浏览器没有显示正文，或者有更好的解决方案。

这是我的控制者：

public HttpResponseMessage Upload()
    {
        HttpResponseMessage m = new HttpResponseMessage(HttpStatusCode.OK);
        List<string> returnlist = new List<string>();


        for (int i = 0; i < Request.Files.Count; i++)
        {
            HttpPostedFileBase file = Request.Files[i]; //Uploaded file
            //Use the following properties to get file's name, size and MIMEType
            int fileSize = file.ContentLength;

            if (file.FileName != "")
            {
                string fileName = string.Format("{0}.{1}", Guid.NewGuid().ToString(), file.FileName.ToString().Split('.')[1].ToString());
                returnlist.Add(fileName);

            }

        }


//Here I write the response message headers
        HttpResponseMessage response = new HttpResponseMessage();

        response.Content = new StringContent(string.Join(",", returnlist), Encoding.UTF8, "text/html");

        response.Headers.Add("data", string.Join(",", returnlist));

        return response;
    }

以下是我如何得到标题回复：

var xhr = new XMLHttpRequest();
            xhr.open('POST', baseUrl + 'Home/Upload');
            xhr.send(formdata);
            xhr.onreadystatechange = function (data) {
                if (xhr.responseText.length > 0) {
//header response
                    var response = xhr.responseText;
                 }

设置响应消息内容但我无法检索它

3 个答案: