c# Get方式调用WebAPI,WebService等接口

/// <summary>
///  利用WebRequest/WebResponse进行WebService调用的类
/// </summary>
public class WebServiceHelper
{
    //<webServices>
    //  <protocols>
    //    <add name="HttpGet"/>
    //    <add name="HttpPost"/>
    //  </protocols>
    //</webServices>

    /// <summary>
    /// 需要WebService支持Get调用
    /// </summary>
    public string QueryGetWebService(string URL, string MethodName, Hashtable Pars)
    {
        string detilurl = URL + "/" + MethodName + "?" + ParsToString(Pars);
        HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(detilurl);
        request.Method = "GET";
        request.ContentType = "application/x-www-form-urlencoded";
        SetWebRequest(request);
        try
        {
            return ReadXmlResponseString(request.GetResponse());
        }
        catch (Exception ex)
        {
            return "NG:"+ex.ToString();
        }
    }


    /// <summary>
    /// 针对信息解读(根据实际调整)
    /// </summary>
    public string GetReturnInnerMsg(string jsonStr)
    {
        XmlDocument doc = new XmlDocument();
        doc.LoadXml(jsonStr);

        XmlNamespaceManager xmlnsManager = new XmlNamespaceManager(doc.NameTable);
        xmlnsManager.AddNamespace("ns", "http://wserver");

        XmlNode returnNode = doc.SelectSingleNode("//ns:return", xmlnsManager);
        if (returnNode != null)
        {
            if (returnNode.InnerText.Contains(":"))
            {
                return returnNode.InnerText.Replace(" ","").Split(':')[1];
            }
            return returnNode.InnerText;
        }
        else
        {
            return "";
        }
    }



    /// <summary>
    /// 设置WEB请求
    /// </summary>
    /// <param name="request"></param>
    private void SetWebRequest(HttpWebRequest request)
    {
        request.Credentials = CredentialCache.DefaultCredentials;
        request.Timeout = 10000;
    }



    /// <summary>
    /// 将Hashtable转换成WEB请求键值对字符串
    /// </summary>
    /// <param name="Pars"></param>
    /// <returns></returns>
    private string ParsToString(Hashtable Pars)
    {
        StringBuilder sb = new StringBuilder();
        foreach (string k in Pars.Keys)
        {
            if (sb.Length > 0)
            {
                sb.Append("&");
            }
            // sb.Append(HttpUtility.UrlEncode(k) + "=" + HttpUtility.UrlEncode(Pars[k].ToString()));
            sb.Append(k+ "=" +Pars[k].ToString());
        }
        return sb.ToString();
    }
    private string ReadXmlResponseString(WebResponse response)
    {
        StreamReader sr = new StreamReader(response.GetResponseStream(), Encoding.UTF8);
        string retXml = sr.ReadToEnd();
        sr.Close();
        return retXml;
    }
}

接口无非就是拼接字符串发动到指定的网站

POST 与 Get 一样,改下参数就行

例如:

http://localhost:8080/axis2/services/AAAA/getVerifyCode?args0=abc

返回信息

<ns:getVerifyCodeResponse xmlns:ns="http://wserver">

    <ns:return>C</ns:return>

</ns:getVerifyCodeResponse>

使用方法

 WebServiceHelper webServiceHelper = new WebServiceHelper();

string url="http://localhost:8080/axis2/services/AAAA";

 Hashtable ht = new Hashtable(); //创建一个Hashtable实例                   

//正式库
ht.Add("args0", "abc");

//发送数据
string msg = webServiceHelper.QueryGetWebService(url, "getVerifyCode", ht);
 if (msg.Substring(0, 2)=="NG")
 {
      MessageForm mf = new MessageForm("总成,加密接口通信异常!", msg, true);
      mf.ShowDialog();
      return; 

}

//接收反馈信息

string EnBarCode = webServiceHelper.GetReturnInnerMsg(msg);

-------------------------------------------------------------

asmx   调用:  不推荐,每次使用都需要反射

天气的测试地址

WeatherWebService Web 服务http://www.webxml.com.cn/WebServices/WeatherWebService.asmxwsdl

http://www.webxml.com.cn/WebServices/WeatherWebService.asmx?wsdl

用方法一:

http://www.webxml.com.cn/WebServices/WeatherWebService.asmx/getSupportCity?byProvinceName=上海

方法二:

    /* 调用方式
  *   string url = "http://www.webservicex.net/globalweather.asmx" ;
  *   string[] args = new string[2] ;
  *   args[0] = "Hangzhou";
  *   args[1] = "China" ;
  *   object result = WebServiceHelper.InvokeWebService(url ,"GetWeather" ,args) ;
  *   Response.Write(result.ToString());
  */
    class WebServiceHelper
    {
        #region InvokeWebService
        /// <summary>
        /// 动态调用web服务
        /// </summary>
        /// <param name="url">WSDL服务地址</param>
        /// <param name="methodname">方法名</param>
        /// <param name="args">参数</param>
        /// <returns></returns>
        public static object InvokeWebService(string url, string methodname, object[] args)
        {
            return WebServiceHelper.InvokeWebService(url, null, methodname, args);
        }

        /// <summary>
        /// 动态调用web服务
        /// </summary>
        /// <param name="url">WSDL服务地址</param>
        /// <param name="classname">类名</param>
        /// <param name="methodname">方法名</param>
        /// <param name="args">参数</param>
        /// <returns></returns>
        public static object InvokeWebService(string url, string classname, string methodname, object[] args)
        {
            string @namespace = "EnterpriseServerBase.WebService.DynamicWebCalling";
            if ((classname == null) || (classname == ""))
            {
                classname = WebServiceHelper.GetWsClassName(url);
            }

            try
            {
                //获取WSDL
                WebClient wc = new WebClient();
                Stream stream = wc.OpenRead(url + "?WSDL");
                ServiceDescription sd = ServiceDescription.Read(stream);
                ServiceDescriptionImporter sdi = new ServiceDescriptionImporter();
                sdi.AddServiceDescription(sd, "", "");
                CodeNamespace cn = new CodeNamespace(@namespace);

                //生成客户端代理类代码
                CodeCompileUnit ccu = new CodeCompileUnit();
                ccu.Namespaces.Add(cn);
                sdi.Import(cn, ccu);
                CSharpCodeProvider icc = 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 = icc.CompileAssemblyFromDom(cplist, ccu);
                if (true == cr.Errors.HasErrors)
                {
                    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 Exception(sb.ToString());
                }

                //生成代理实例，并调用方法
                System.Reflection.Assembly assembly = cr.CompiledAssembly;
                Type t = assembly.GetType(@namespace + "." + classname, true, true);
                object obj = Activator.CreateInstance(t);
                System.Reflection.MethodInfo mi = t.GetMethod(methodname);

                return mi.Invoke(obj, args);

                /*
                PropertyInfo propertyInfo = type.GetProperty(propertyname);
                return propertyInfo.GetValue(obj, null);
                */
            }
            catch (Exception ex)
            {
                throw new Exception(ex.InnerException.Message, new Exception(ex.InnerException.StackTrace));
            }
        }

        private static string GetWsClassName(string wsUrl)
        {
            string[] parts = wsUrl.Split('/');
            string[] pps = parts[parts.Length - 1].Split('.');

            return pps[0];
        }
        #endregion
    }

 string url = "http://10.255.30.40:9003/LESPrepareDeliveryService.asmx";
            //方法
            string fuc = "getSpsMatDt";
            //参数
            string par = "3210;A1;NS001";
            int Pcount = par.Split(';').Count() + 1;
            //生成参数信息
            string[] args = new string[Pcount];
            for (int i = 0; i < Pcount - 1; i++)
            {
                args[i] = par.Split(';')[i];
            }
            args[Pcount - 1] = dtm;

            //获取Webservice的数据信息
            object result = WebServiceHelper.InvokeWebService(url, fuc, args);
            DataTable dt = (DataTable)result;
            return dt;