从JSON阅读，不显示数据 [英] Reading from JSON, data not displayed

问题描述

我有这个奇怪的问题。我retreve JSON字符串从URL像这样，

I'm having this strange problem when i try to access elements in json from javascript. i retreve a json string from a url like so,

        // Create Request
        HttpWebRequest req = (HttpWebRequest)WebRequest.Create(@"www.someurl.com");

        // Create Client
        WebClient client = new WebClient();

        // Assign Credentials
        client.Credentials = new NetworkCredential("username", "pass");

        // Grab Data
        sjson = client.DownloadString(@"www.someurl.com");
        System.Web.Script.Serialization.JavaScriptSerializer oSerializer = new System.Web.Script.Serialization.JavaScriptSerializer();
        oSerializer.MaxJsonLength = Int32.MaxValue;
        sjson = oSerializer.Serialize(sjson);

但是，当我从JavaScript的HTML code访问此sjson变量，它不返回任何东西，但如果我硬code，它返回的值，请在这一个帮助。我试过很多东西，但没有奏效。我也试过，只是通过retreieved JSON字符串没有序列化，当我做到这一点的JavaScript停止工作。 :(以下是JavaScript code，

But when i access this sjson variable from javascript in html code, it doesn't return anything, but if i hard code it, it returns the values, please help on this one. I tried many things but didn't work. I also tried to just pass the retreieved json string without serializing, when i do that the javascript stops working. :( following is the javascript code,

    <script type="text/javascript">
    var jsons = JSON.parse('<%=sjson%>');


    function initialize() {
        alert("hahahahaaa");
        document.writeln(jsons.Body[0].RowId.SensorIdValue);
        //document.writeln(myobject.Body[0].RowId.SensorIdValue);
    }
    </script>

问题是

    document.writeln(myobject.Body[0].RowId.SensorIdValue); 

返回一个值，如果我使用MyObject的变量，但

returns a value if i use the myobject variable, but

    document.writeln(jsons.Body[0].RowId.SensorIdValue);

返回没事的时候我与解析值使用。 :(

returns nothing when i use it with the parsed value. :(

以下是JSON输出（的Response.Write）通过C＃运行后，序列化器我得到的样本，

following is the sample of the json output (response.write) i get after running the serializer via c#,

请帮我在这one..i不能似乎在这里找到问题。

Please help me on this one..i cant seem to find the problem here.

编辑：

如果它帮忙，fiollowing是JSON字符串我从服务器获取直不用其他作出任何序列化，

if it help, the fiollowing is the json string i get straight from the server witout making any serializations,

问题的很少的内容已被删除，由于业主要求

推荐答案

您不需要使用JSON序列化，因为远程服务器已返回一个JSON EN codeD字符串，你可以直接在页面中使用，避免双重编码。

You don't need to use a Json serializer because the remote server already returns a JSON encoded string that you could directly use in your page and avoid the double encoding.

所以：

public string GetJson()
{
    // Create Client
    using (WebClient client = new WebClient())
    {
        // Assign Credentials
        client.Credentials = new NetworkCredential("username", "pass");

        // Grab Data
        return client.DownloadString(
            @"www.someurl.com"
        );
    }
}

和则：

<script type="text/javascript">
    var jsons = <%= GetJson() %>;
    function initialize() {
        alert("hahahahaaa");
        document.writeln(jsons.Body[0].RowId.SensorIdValue);
        //document.writeln(myobject.Body[0].RowId.SensorIdValue);
    }
</script>

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