C# 动态调用http及 webservice服务

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

namespace Test
{
    public class RestfullRequest
    {
        public static string Request(string url, string method, string contentType, string data, NameValueCollection header=null,NetworkCredential credential=null,
            string proxyAddress = null, Encoding responseEncoding= null)
        {
            var request = (HttpWebRequest)WebRequest.Create(url);
            request.Method = method;
            if (!string.IsNullOrEmpty(contentType))
                request.ContentType = contentType;
            if (header != null)
                request.Headers.Add(header);
            if (credential != null)
                request.Credentials = credential;

            if (!string.IsNullOrEmpty(proxyAddress))
            {
                IWebProxy proxy = new WebProxy(proxyAddress);
                proxy.Credentials = new NetworkCredential();
                request.Proxy = proxy;
            }

            if (!string.IsNullOrEmpty(data))
            {
                using (var swt = new StreamWriter(request.GetRequestStream()))
                {
                    swt.Write(data);
                }
            }

            string result = string.Empty;
            using (WebResponse response = request.GetResponse())
            {
                if (response.ContentType.IndexOf("octet-stream") > -1)
                {
                    string dispositionStr = response.Headers["Content-Disposition"];
                    int fileNameI = dispositionStr.IndexOf("filename=");
                    string fileName = dispositionStr.Substring(fileNameI + 9, dispositionStr.Length - (fileNameI + 9));
                    fileName = HttpUtility.UrlDecode(fileName, Encoding.UTF8);
                    string downpath = AppDomain.CurrentDomain.BaseDirectory + "Download";
                    if (!Directory.Exists(downpath)) {
                        Directory.CreateDirectory(downpath);
                    }
                    string downFile= downpath + "\" + fileName;

                    if (File.Exists(downFile))
                    {
                        File.Delete(downFile);
                    }
                    Stream inStream = response.GetResponseStream();
                    using (Stream outStream = File.OpenWrite(downFile)) {
                        byte[] buffer = new byte[8192];
                        int size = 0;
                        while ((size = inStream.Read(buffer, 0, 8192)) > 0)
                        {
                            outStream.Write(buffer, 0, size);
                        }
                    }
                    result = downFile;
                }
                else {

Stream stream = response.GetResponseStream();
if (responseEncoding == null) responseEncoding = Encoding.UTF8;
StreamReader myStreamReader = new StreamReader(stream, responseEncoding);
result = myStreamReader.ReadToEnd();
myStreamReader.Close();
stream.Close();
//byte[] buf = new byte[1024];
//while (true)
//{
// int len = stream.Read(buf, 0, buf.Length);
// if (len <= 0)//len <= 0 跳出循环
// break;
// if (responseEncoding == null) responseEncoding = Encoding.UTF8;
// result += responseEncoding.GetString(buf, 0, len);//指定编码格式
//}

                }
                //using (var sr = new StreamReader(response.GetResponseStream()))
                //{
                //    result = sr.ReadToEnd();
                //}
            }
            
            return result;
        }

        public static bool IsFileInUse(string fileName)
        {
            bool inUse = true;

            FileStream fs = null;
            try
            {

                fs = new FileStream(fileName, FileMode.Open, FileAccess.Read,

                FileShare.None);

                inUse = false;
            }
            catch
            {

            }
            finally
            {
                if (fs != null)

                    fs.Close();
            }
            return inUse;//true表示正在使用,false没有使用
        }
    }
}

下面是调用：asmx（webservice）

using Microsoft.CSharp;
using System;
using System.CodeDom;
using System.CodeDom.Compiler;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;
using System.Web.Services.Description;

namespace Test
{
    /// <summary>
    /// 动态调用WebService的帮助类
    /// </summary>
    public 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 object InvokeWebService(string url, string methodname, object[] args)
        {
            return this.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 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();
                if (!url.ToUpper().Contains("WSDL"))
                {
                    url = string.Format("{0}?{1}", url, "WSDL");
                }
                Stream stream = wc.OpenRead(url);
                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)
                {
                    StringBuilder sb = new StringBuilder();
                    foreach (CompilerError ce in cr.Errors)
                    {
                        sb.Append(ce.ToString());
                        sb.Append(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);
            }
            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('.');
            if (pps[0].Contains("?"))
            {
                return pps[0].Split('?')[0];
            }
            return pps[0];
        }
        #endregion
    }
}

调用：

WebServiceHelper webService = new WebServiceHelper();
object obj= webService.InvokeWebService("http://127.0.0.1:8001/WebService1.asmx", "Add", new object[] {22,33 });
DataTable dt = obj as DataTable;

https://www.jb51.net/article/190211.htm