C# 动态调用WebService 2

最新推荐文章于 2022-01-01 20:03:05 发布

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最新推荐文章于 2022-01-01 20:03:05 发布

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原文链接：http://www.cnblogs.com/ilookbo/p/5549262.html

本文介绍了一种通过C#动态调用WebService的方法。利用ServiceDescription和CodeDom等API，可以自动生成并编译WebService客户端代理类，从而实现对任意WebService接口的调用。

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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.ServiceModel;
using System.ServiceModel.Security;
using System.Text;
using System.Threading.Tasks;
using System.Web.Services.Description;

public class WebServiceHelper
{
    #region InvokeWebService   
    //动态调用web服务   
    public object InvokeWebService(string url, string methodname, object[] args)
    {
        return InvokeWebService(url, null, methodname, args);
    }

    public object InvokeWebService(string url, string classname,
        string methodname, object[] args)
    {
        //string @namespace = "EnterpriseServerBase.WebService.DynamicWebCalling";
        string @namespace = "FrameWork.WebService.DynamicWebServiceCalling";
        //FrameWork.WebService.DynamicWebServiceCalling

        if (string.IsNullOrEmpty(classname))
        {
            classname = GetWsClassName(url);
        }

        //获取WSDL   
        WebClient wc = new WebClient();

        url = url.Trim().ToLower().Trim("?wsdl".ToCharArray()) + "?WSDL";
        Stream stream = wc.OpenRead(url);
        ServiceDescription sd = ServiceDescription.Read(stream);

        sd.Bindings.Add(CreateBinding("MaxBufferSize", "2147483647"));
        sd.Bindings.Add(CreateBinding("maxReceivedMessageSize", "2147483647"));

        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);

        CodeDomProvider csc = CodeDomProvider.CreateProvider("CSharp");

        //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 (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);
    }

    private Binding CreateBinding(string name, string doc)
    {
        Binding bd = new Binding();
        bd.Name = name;
        bd.Documentation = doc;
        return bd;
    }

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

        return pps[0];
    }
    #endregion
}