Question

当我尝试将JSON字符串发布到客户端时，我有以下错误。

Uncaught Error: You're trying to decode an invalid JSON String: 

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head><title>

</title></head>
<body>
    <form method="post" action="WebForm1.aspx" id="form1">
<div class="aspNetHidden">
<input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE" value="/wEPDwULLTE2MTY2ODcyMjlkZDU/UqTLS4JCyWg8lH2WKg+TKxlfMLv46f+TlE5HbZ5k" />
</div>

    <div>

    </div>
    </form>
</body>
</html>

它返回所有HTML页面。我的服务器端代码是这样的：

var httpWebRequest = (HttpWebRequest)WebRequest.Create("http://localhost:59145/My%20Application.app/webapp/index.html");
        httpWebRequest.ContentType = "application/json";
        httpWebRequest.Method = "POST";
        string json = "{ \"myresultlist\": [ {\"uname\": \"1\",\"pass\": \"anne\" }, { \"uname\": \"2\", \"pass\": \"jack\" }, {\"uname\": \"3\", \"pass\": \"Tom\" } ]}";


        httpWebRequest.ContentLength = json.Length;

        using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
        {

            streamWriter.Write(json);
            streamWriter.Flush();
            streamWriter.Close();

        }

有人有任何想法吗？如何只将JSON字符串发送给客户端？

Answer 1

解决方案如下。

出错的原因是服务器端后期操作。

当我用这个块更改代码时，我得到了json字符串。

Response.Expires = 0;
Response.ContentType = "application/json";
        Response.Write("{ \"myresultlist\": [ {\"uname\": \"1\",\"pass\": \"anne\" }, { \"uname\": \"2\", \"pass\": \"jack\" }, {\"uname\": \"3\", \"pass\": \"Tom\" } ]}");
        Response.End();

Answer 2

如果您的客户正在执行POST，则您的服务器无法POST返回。不要将HTTP方法设置为POST。

看看这个服务器响应：

HTTP/1.1 200 OK
Date: Wed, 10 Oct 2012 19:58:46 GMT
Server: Apache/2.2.22 (Win64) PHP/5.4.3
Vary: Accept-Encoding,User-Agent
Content-Encoding: gzip
Keep-Alive: timeout=5, max=99
Connection: Keep-Alive
Transfer-Encoding: chunked
Content-Type: application/javascript; charset="iso-8859-1"

Sencha Touch Error您正在尝试解码ASP.NET中无效的JSON String HTML页面

2 个答案: