C# 动态调用webService(转)

今日做项目需要用到webservice,就试了试。结果在引用那添加是可以的，但是现在我们那个webservice还没写出来，所以就想用动态调用webservice。所以找了很多资料看了看，也在网上查了查，发现一个不错的方法，所以转载过来。

using System;
using System.Web.Services.Description;
using System.IO;
using System.Net;
using System.Text;
using System.CodeDom;
using System.CodeDom.Compiler;
using Microsoft.CSharp;

namespace WebServciesTest
{
class WebServiceHelper
{
private WebServiceHelper()
{
}
//动态调用web服务
public static object InvokeWebService(string url, string methodname, object[] args)
{
return WebServiceHelper.InvokeWebService(url, null, methodname, args);
}

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 csc = new CSharpCodeProvider();
ICodeCompiler icc = csc.CreateCompiler();

//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);
}
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];
}
}
}

调用示例

private void button1_Click(object sender, EventArgs e)
{
string[] args1 = new string[1];
args1[0] = this.textBox1.Text;//获取IP地址

object obj = WebServiceHelper.InvokeWebService("http://www.webxml.com.cn/WebServices/IpAddressSearchWebService.asmx", "getCountryCityByIp", args1);
//显示IP对应区域信息
this.textBox2.Text = ((string[])(obj))[1];
}