C# .Net动态调用webService达成思路及代码

代码如下:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Net;

using System.IO;

using System.Web.Services.Description;

using System.CodeDom;

using Microsoft.CSharp;

using System.CodeDom.Compiler;

using System.Reflection;

namespace HTTPS

{

public class WSHelper

{

/// < 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 WSHelper.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 = WSHelper.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);

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