功能描述：用户输入一个IP地址，查IP所在地等信息。
API接口：http://ip.taobao.com/service/getIpInfo.php?ip=125.36.12.14
接口返回数据是JSON:
{"code":0,"data":{"ip":"125.36.12.14","country":"\u4e2d\u56fd","country_id":"86","area":"\u534e\u5317","area_id":"100000","region":"\u5929\u6d25\u5e02","region_id":"120000","city":"\u5929\u6d25\u5e02","city_id":"120000","county":"\u6b66\u6e05\u533a","county_id":"120114","isp":"\u8054\u901a","isp_id":"100026"}}
code中的0表示成功，1表示失败。
对JSON不懂，用string接收不了这段数据。
所以直接求代码，最好能有注释。
------解决方案--------------------------------------------------------
用 Json.NET 反序列化成
public class IpInfo
{
public string code;
public Hashtable data;
}
- C# code
class Program { static void Main(string[] args) { var getIpInfoUrl = "http://ip.taobao.com/service/getIpInfo.php?ip={0}"; getIpInfoUrl = string.Format(getIpInfoUrl, "125.36.12.14"); var client = new WebClient(); var result = client.DownloadString(getIpInfoUrl); var ipInfo = Newtonsoft.Json.JsonConvert.DeserializeObject<IpInfo>(result); foreach (var key in ipInfo.data.Keys) Console.WriteLine("{0}:{1}", key, ipInfo.data[key]); Console.Read(); } } public class IpInfo { public string code; public Hashtable data; }
------解决方案--------------------------------------------------------
- C# code
protected void Page_Load(object sender, EventArgs e) { string path = "http://ip.taobao.com/service/getIpInfo.php?ip=125.36.12.14"; HttpWebRequest hwrq = (HttpWebRequest)WebRequest.Create(path); HttpWebResponse hwrp = (HttpWebResponse)hwrq.GetResponse(); Stream stream = null; try { stream = hwrp.GetResponseStream(); DataContractJsonSerializer datajson = new DataContractJsonSerializer(typeof(IpInfo)); IpInfo ipinfo = datajson.ReadObject(stream) as IpInfo; Response.Write(ipinfo.code + "==" + ipinfo.data.ip + "==" + ipinfo.data.country + "==" + ipinfo.data.area); } finally { if (stream != null) { stream.Close(); stream.Dispose(); } } } [DataContract] public class IpInfo { [DataMember] public int code; [DataMember] public data data; } [DataContract] public class data { [DataMember] public string ip; [DataMember] public string country; [DataMember] public string country_id; [DataMember] public string area; [DataMember] public string area_id; [DataMember] public string region; [DataMember] public string region_id; [DataMember] public string city; [DataMember] public string city_id; [DataMember] public string county; [DataMember] public string county_id; [DataMember] public string isp; [DataMember] public string isp_id; }