接口调用帮助类（http调接口、WebService动态调接口）

1.HttpGetPost调用接口实现

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.IO;

namespace Helper
{
   public class HttpGetPostHelper
    {
       /// <summary>
       /// HttpGet
       /// </summary>
       /// <param name="url"></param>
       /// <returns></returns>
       public static string HttpGet(string url)
       {
           string result = string.Empty;
           HttpWebRequest wbRequest = (HttpWebRequest)WebRequest.Create(url);
           wbRequest.Method = "GET";
           HttpWebResponse wbResponse = (HttpWebResponse)wbRequest.GetResponse();
           using (Stream responseStream = wbResponse.GetResponseStream())
           {
               using (StreamReader sReader = new StreamReader(responseStream))
               {
                   result = sReader.ReadToEnd();
               }
           }
           return result;
       }
       /// <summary>
       /// HttpPost
       /// </summary>
       /// <param name="url"></param>
       /// <param name="paramData">参数（若是对象可使用Json格式）</param>
       /// <param name="headerDic">请求头</param>
       /// <returns></returns>
       public static string HttpPost(string url, string paramData, Dictionary<string, string> headerDic)
       {
           string result = string.Empty;
           HttpWebRequest wbRequest = (HttpWebRequest)WebRequest.Create(url);
           wbRequest.Method = "POST";
           wbRequest.ContentType = "application/json";// "application/x-www-form-urlencoded";
           wbRequest.ContentLength = Encoding.UTF8.GetByteCount(paramData);
           
           if (headerDic != null && headerDic.Count > 0)
           {
               foreach (var item in headerDic)
               {
                   wbRequest.Headers.Add(item.Key, item.Value);
               }
           }
           using (Stream requestStream = wbRequest.GetRequestStream())
           {
               using (StreamWriter swrite = new StreamWriter(requestStream))
               {
                   swrite.Write(paramData);
               }
           }
           HttpWebResponse wbResponse = (HttpWebResponse)wbRequest.GetResponse();
           using (Stream responseStream = wbResponse.GetResponseStream())
           {
               using (StreamReader sread = new StreamReader(responseStream))
               {
                   result = sread.ReadToEnd();
               }
           }
           return result;
       }
    }
}

2.WebService动态调接口

using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.IO;
using System;
using System.Web.Services.Description; //WS的描述 
using System.CodeDom;
using System.CodeDom.Compiler;
using System.Reflection;
using Microsoft.CSharp;


namespace MYToOtherInterface.Domain
{
    /// <summary>
    /// Webservices测试
    /// </summary>
    public static class WebServiceHelper
    {
 /// <summary>
        /// 调用Webservice
        /// </summary>
        /// <param name="methodName">方法名</param>
        /// <param name="addParams">参数数组</param>
       /// <param name="headerDic">请求头</param>
        /// <returns></returns>
        public static string InvokeWebservice(string WebserviceUrl, string methodName, object[] addParams, Dictionary<string, string> headerDic)
        {

            //服务地址，该地址可以放到程序的配置文件中，这样即使服务地址改变了，也无须重新编译程序。
          
            //< add key = "WebService252" value = "http ://10.5.107.16:9002/OpenApi/SlxtService.asmx" />
            string url = WebserviceUrl;
            if (string.IsNullOrEmpty(url))
            {
                throw new Exception("接口地址未配置！");
            }
            //客户端代理服务命名空间，可以设置成需要的值。  
            string ns = string.Format("ProxyServiceReference");

            if (!url.ToUpper().Contains("?WSDL"))
            {
                url = url + "?wsdl";
            }
            //获取WSDL  
            WebClient wc = new WebClient();
            
            Stream stream = wc.OpenRead(url);
            if (headerDic != null && headerDic.Count > 0)
            {
                foreach (var item in headerDic)
                {
                    wc.Headers.Add(item.Key, item.Value);
                }
            }
            ServiceDescription sd = ServiceDescription.Read(stream);//服务的描述信息都可以通过ServiceDescription获取  
            string classname = sd.Services[0].Name;

            ServiceDescriptionImporter sdi = new ServiceDescriptionImporter();
            sdi.AddServiceDescription(sd, "", "");
            CodeNamespace cn = new CodeNamespace(ns);
            
            //生成客户端代理类代码  
            CodeCompileUnit ccu = new CodeCompileUnit();
            ccu.Namespaces.Add(cn);
            sdi.Import(cn, ccu);
            CSharpCodeProvider csc = new CSharpCodeProvider();

            //设定编译参数  
            CompilerParameters cplist = new CompilerParameters();
            cplist.GenerateExecutable = false;
            cplist.GenerateInMemory = true;
            cplist.ReferencedAssemblies.Add("System.dll");
            cplist.ReferencedAssemblies.Add("System.XML.dll");
            cplist.ReferencedAssemblies.Add("System.Web.Services.dll");
            cplist.ReferencedAssemblies.Add("System.Data.dll");

            //编译代理类  
            CompilerResults cr = csc.CompileAssemblyFromDom(cplist, ccu);
            if (cr.Errors.HasErrors == true)
            {
                System.Text.StringBuilder sb = new System.Text.StringBuilder();
                foreach (System.CodeDom.Compiler.CompilerError ce in cr.Errors)
                {
                    sb.Append(ce.ToString());
                    sb.Append(System.Environment.NewLine);
                }
                throw new ArgumentException(sb.ToString());
            }
            //生成代理实例，并调用方法  
            Assembly assembly = cr.CompiledAssembly;
            Type t = assembly.GetType(ns + "." + classname, true, true);
            object obj = Activator.CreateInstance(t);

            //调用方法  
            MethodInfo add = t.GetMethod(methodName);
            object addReturn = add.Invoke(obj, addParams);
            var s = addReturn.ToString();
            return s;
        }

    }
}