记录api地址接口调过程碰到的坑

作为一个小白，最近在做一个项目的时候要调用ip地址数据，折腾了好久，最后终于把这个对接成功，下面贴出来代码，自己以后需要用到的时候回来看：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.IO;
using Xfrog.Net;
using System.Diagnostics;
using System.Web;
 
//----------------------------------
// IP地址调用示例代码 － 聚合数据
// 在线接口文档：
// 代码中JsonObject类下载地址:
//----------------------------------
 
namespace ConsoleAPI
{
    class Program
    {
        static void Main(string[] args)
        {
            string appkey = "*******************"; //配置您申请的appkey
 
             
            //1.根据IP/域名查询地址
            string url1 = "";
 
            var parameters1 = new Dictionary();
 
            parameters1.Add("ip" , ""); //需要查询的IP地址或域名
            parameters1.Add("key", appkey);//你申请的key
            parameters1.Add("dtype" , ""); //返回数据的格式,xml或json，默认json
 
            string result1 = sendPost(url1, parameters1, "get");
 
            JsonObject newObj1 = new JsonObject(result1);
            String errorCode1 = newObj1["error_code"].Value;
 
            if (errorCode1 == "0")
            {
                Debug.WriteLine("成功");
                Debug.WriteLine(newObj1);
            }
            else
            {
                //Debug.WriteLine("失败");
                Debug.WriteLine(newObj1["error_code"].Value+":"+newObj1["reason"].Value);
            }
 
 
        }
 
        ///
        /// Http (GET/POST)
        ///
        /// 请求URL
        /// 请求参数
        /// 请求方法
        /// 响应内容
        static string sendPost(string url, IDictionary parameters, string method)
        {
            if (method.ToLower() == "post")
            {
                HttpWebRequest req = null;
                HttpWebResponse rsp = null;
                System.IO.Stream reqStream = null;
                try
                {
                    req = (HttpWebRequest)WebRequest.Create(url);
                    req.Method = method;
                    req.KeepAlive = false;
                    req.ProtocolVersion = HttpVersion.Version10;
                    req.Timeout = 5000;
                    req.ContentType = "application/x-www-form-urlencoded;charset=utf-8";
                    byte[] postData = Encoding.UTF8.GetBytes(BuildQuery(parameters, "utf8"));
                    reqStream = req.GetRequestStream();
                    reqStream.Write(postData, 0, postData.Length);
                    rsp = (HttpWebResponse)req.GetResponse();
                    Encoding encoding = Encoding.GetEncoding(rsp.CharacterSet);
                    return GetResponseAsString(rsp, encoding);
                }
                catch (Exception ex)
                {
                    return ex.Message;
                }
                finally
                {
                    if (reqStream != null) reqStream.Close();
                    if (rsp != null) rsp.Close();
                }
            }
            else
            {
                //创建请求
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url + "?" + BuildQuery(parameters, "utf8"));
 
                //GET请求
                request.Method = "GET";
                request.ReadWriteTimeout = 5000;
                request.ContentType = "text/html;charset=UTF-8";
                HttpWebResponse response = (HttpWebResponse)request.GetResponse();
                Stream myResponseStream = response.GetResponseStream();
                StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));
 
                //返回内容
                string retString = myStreamReader.ReadToEnd();
                return retString;
            }
        }
 
        ///
        /// 组装普通文本请求参数。
        ///
        /// Key-Value形式请求参数字典
        /// URL编码后的请求数据
        static string BuildQuery(IDictionary parameters, string encode)
        {
            StringBuilder postData = new StringBuilder();
            bool hasParam = false;
            IEnumerator dem = parameters.GetEnumerator();
            while (dem.MoveNext())
            {
                string name = dem.Current.Key;
                string value = dem.Current.Value;
                // 忽略参数名或参数值为空的参数
                if (!string.IsNullOrEmpty(name))//&& !string.IsNullOrEmpty(value)
                {
                    if (hasParam)
                    {
                        postData.Append("&");
                    }
                    postData.Append(name);
                    postData.Append("=");
                    if (encode == "gb2312")
                    {
                        postData.Append(HttpUtility.UrlEncode(value, Encoding.GetEncoding("gb2312")));
                    }
                    else if (encode == "utf8")
                    {
                        postData.Append(HttpUtility.UrlEncode(value, Encoding.UTF8));
                    }
                    else
                    {
                        postData.Append(value);
                    }
                    hasParam = true;
                }
            }
            return postData.ToString();
        }
 
        ///
        /// 把响应流转换为文本。
        ///
        /// 响应流对象
        /// 编码方式
        /// 响应文本
        static string GetResponseAsString(HttpWebResponse rsp, Encoding encoding)
        {
            System.IO.Stream stream = null;
            StreamReader reader = null;
            try
            {
                // 以字符流的方式读取HTTP响应
                stream = rsp.GetResponseStream();
                reader = new StreamReader(stream, encoding);
                return reader.ReadToEnd();
            }
            finally
            {
                // 释放资源
                if (reader != null) reader.Close();
                if (stream != null) stream.Close();
                if (rsp != null) rsp.Close();
            }
        }
    }
}
作为一个踏入软件开发的小白，还有非常多的坑需要踩，这是碰到的第一个，我会一个个都记录下来，作为自己成长的记录。