.Net动态调用WebService

 

using System;

using System.Data;

using System.Configuration;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

using System.IO;

using System.CodeDom;

using System.CodeDom.Compiler;

using System.Net;

using System.Web.Services;

using System.Web.Services.Description;

using Microsoft.CSharp;

/// <summary>

/// WebServiceHelper 的摘要说明

/// </summary>

public class WebServiceHelper

{

public WebServiceHelper()

{

  //

  // TODO: 在此处添加构造函数逻辑

  //

}

    /// <summary>

    /// 动态调用WebService

    /// </summary>

    /// <param name="url">WebService地址</param>

    /// <param name="methodname">方法名(模块名)</param>

    /// <param name="args">参数列表</param>

    /// <returns>object</returns>

    public static object InvokeWebService(string url, string methodname, object[] args)

    {

        return InvokeWebService(url, null, methodname, args);

    }

    /// <summary>

    /// 动态调用WebService

    /// </summary>

    /// <param name="url">WebService地址</param>

    /// <param name="classname">类名</param>

    /// <param name="methodname">方法名(模块名)</param>

    /// <param name="args">参数列表</param>

    /// <returns>object</returns>

    public static object InvokeWebService(string url, string classname, string methodname, object[] args)

    {

        string @namespace = "ServiceBase.WebService.DynamicWebLoad";

        if (classname == null || classname == "")

        {

            classname = WebServiceHelper.GetClassName(url);

        }

        ///动态调用类所执行的过程

        //1.获取服务描述语言(WSDL)

        WebClient wc = new WebClient();

        Stream stream = wc.OpenRead(url + "?WSDL");

        ServiceDescription sd = ServiceDescription.Read(stream);//设置Web服务描述语言

        ServiceDescriptionImporter sdi = new ServiceDescriptionImporter();//生成客户端代理类

        sdi.AddServiceDescription(sd, "", "");

        CodeNamespace cn = new CodeNamespace(@namespace);//声明命名空间

        //2.生成客户端代理类代码

        CodeCompileUnit ccu = new CodeCompileUnit();//为CodeDOM程序图形提供容器

        ccu.Namespaces.Add(cn);//获取命名空间集合

        sdi.Import(cn, ccu);

        CSharpCodeProvider csc = new CSharpCodeProvider();//提供对 C# 代码生成器和代码编译器的实例的访问

        ICodeCompiler icc = csc.CreateCompiler();//定义用于调用源代码编译的接口或使用指定编译器的 CodeDOM 树

        //3.设定编译器的参数

        CompilerParameters cplist = new CompilerParameters();

        cplist.GenerateExecutable = false;//设置是否为可执行文件

        cplist.GenerateInMemory = true;//设置是否在内存中生成输出

        cplist.ReferencedAssemblies.Add("System.dll");

        cplist.ReferencedAssemblies.Add("System.XML.dll");

        cplist.ReferencedAssemblies.Add("System.Web.Services.dll");

        cplist.ReferencedAssemblies.Add("System.Data.dll");

        //4.编译代理类

        CompilerResults cr = icc.CompileAssemblyFromDom(cplist, ccu);//使用指定的编译器设置编译程序集

        if (true == cr.Errors.HasErrors)

        {

            System.Text.StringBuilder sb = new System.Text.StringBuilder();

            foreach (CompilerError ce in cr.Errors)

            {

                sb.Append(ce.ToString());

                sb.Append(System.Environment.NewLine);

            }

            throw new Exception(sb.ToString());

        }

        //5.生成代理实例,并调用方法

        System.Reflection.Assembly assembly = cr.CompiledAssembly;//获取或设置已编译的程序集

        Type t = assembly.GetType(@namespace + "." + classname, true, true);

        object obj = Activator.CreateInstance(t);//为 COM 对象提供对方法的版本无关的访问

        System.Reflection.MethodInfo mi = t.GetMethod(methodname);//通过反射获得方法名

        return mi.Invoke(obj, args);//使用制定的参数调用当前实例所表示的方法，执行方法

    }

    private static string GetClassName(string url)

    {

        string[] parts = url.Split('/');

        string[] pps = parts[parts.Length - 1].Split('.');

        return pps[0];

    }

}

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    protected void Button2_Click(object sender, EventArgs e)

    {

        string WebServiceUrl = "​​http://222.90.232.40:8899/webservice/WebService.asmx​​";

        string WebServiceMethodname = "QueryData";

        object[] args = new object[2];

        args[0] = "select ID,JKZJMC from JKZJLB";

        args[1] = "data source=oradb;uid=movepolicepdasc;pwd=movepolicepdasc";

        DataSet result = (DataSet)WebServiceHelper.InvokeWebService(WebServiceUrl, WebServiceMethodname, args);

        GridView1.DataSource = result.Tables[0];

        GridView1.DataBind();    

    }

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    [WebMethod]

    public void SendToUrl()

    {

        HttpContext.Current.Response.Redirect("​​http://222.90.232.40:8899/webservice/WebService.asmx​​", false);

    }