如何使用JSON.Net阅读JSON和输出HTML？ [英] How to use JSON.Net to read JSON and output HTML?

问题描述

我怎么可以使用JSON.Net和环路通过以下JSON输出一个HTML图像标记（一个字符串）的照片每一个成员对象？

How can I use JSON.Net and loop through the following JSON to output one HTML image tag (a string) for each member of the "photos" object?

我的目标是阅读以下JSON输出字符串：

My goal is to read the below JSON and output this string:

"<img src='/images/foo.jpg' alt='Hello World!'><img src='/images/bar.jpg' alt='Another Photo' />"

JSON存储在外部文件photos.json

JSON is stored in external file "photos.json"

{
    "photos": {
        "photo1": {
            "src": "/images/foo.jpg",
            "alt": "Hello World!"
        },
        "photo2": {
            "src": "/images/bar.jpg",
            "alt": "Another Photo"
        }
    }
}

我已经开始使用类似code怎么在这里显示：的http://www.hanselman.com/blog/NuGetPackageOfTheWeek4DeserializingJSONWithJsonNET.aspx

var client = new WebClient();
client.Headers.Add("User-Agent", "Nobody");
var response = client.DownloadString(new Uri("http://www.example.com/photos.json"));
JObject o = JObject.Parse(response);'
//Now o is an object I can walk around...

不过，我还没有找到一种方法来绕走Ò，如图中的示例。

But, I haven't found a way to "walk around o" as shown in the example.

我想通过照片对象，阅读性能和添加HTML到我的字符串为每张照片的每一个成员循环。

I want to loop through each member of the photos object, read the properties and add html to my string for each photo.

到目前为止，我已经试过这里显示的例子：的 http://james.newtonking.com/json/help/index.html?topic=html/QueryJson.htm
但是，我不能让他们内部的工作，一次为每个循环。

So far, I've tried the examples shown here: http://james.newtonking.com/json/help/index.html?topic=html/QueryJson.htm But, I cannot make them work once inside a for each loop.

推荐答案

下面是你如何可以走动你的 JObject 来提取所需的信息。

Here is how you can "walk around" your JObject to extract the information you need.

string json = @"
{
    ""photos"": {
        ""photo1"": {
            ""src"": ""/images/foo.jpg"",
            ""alt"": ""Hello World!""
        },
        ""photo2"": {
            ""src"": ""/images/bar.jpg"",
            ""alt"": ""Another Photo""
        }
    }
}";

StringBuilder sb = new StringBuilder();
JObject o = JObject.Parse(json);

foreach (JProperty prop in o["photos"].Children<JProperty>())
{
    JObject photo = (JObject)prop.Value;
    sb.AppendFormat("<img src='{0}' alt='{1}' />\r\n", 
                     photo["src"], photo["alt"]);
}

Console.WriteLine(sb.ToString());

输出：

<img src='/images/foo.jpg' alt='Hello World!' />
<img src='/images/bar.jpg' alt='Another Photo' />

这篇关于如何使用JSON.Net阅读JSON和输出HTML？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！