【动态调用webservice】动态调用WebService帮助类

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using System;
using System.Web;
using System.Net;
using System.IO;
using System.CodeDom;
using Microsoft.CSharp;
using System.Reflection;
using System.CodeDom.Compiler;
using System.Collections.Generic;
using System.Web.Services.Protocols;
using System.Web.Services.Description;

namespace HIIStest.UIBase
{
/// <summary>
/// 动态调用WebService帮助类
/// </summary>
public class WebServiceHelper
{
/// <summary>
/// 调用WebService
/// </summary>
/// <typeparam name="T">方法返回值类型</typeparam>
/// <param name="url">服务网址</param>
/// <param name="methodName">方法名</param>
/// <param name="args">方法参数</param>
/// <returns>返回调用结果</returns>
public static T InvokeMethod<T>(string url, string methodName, params object[] args) 
{ 
//设置泛型类型的默认值 
T result = default(T);
//获得类型 
Type t = GetType(url, GetWsClassName(url));
try 
{ 
//依据类型创建实例 
object obj = CreateInstance(t);
//调用方法 
result = InvokeMethod<T>(obj, t, methodName, args);
} 
catch (Exception ex) 
{
throw new Exception(ex.Message);
} 
return result;
}

/// <summary>
/// 调用WebService
/// </summary>
/// <typeparam name="T">方法返回值类型</typeparam>
/// <param name="InstanceObject">实例</param>
/// <param name="t">类的类型(Type)</param>
/// <param name="methodName">方法名</param>
/// <param name="args">方法参数</param>
/// <returns>返回调用结果</returns>
private static T InvokeMethod<T>(object InstanceObject, Type t, string methodName, params object[] args) 
{ 
T result = default(T);
//依据方法名获取方法信息 
System.Reflection.MethodInfo mi = t.GetMethod(methodName);
//调用实例方法 
result = (T)mi.Invoke(InstanceObject, args);
return result;
} 

/// <summary>
/// 获取类型
/// </summary>
/// <param name="url">服务网址</param>
/// <param name="className">服务类型名称</param>
/// <returns>返回Type</returns>
private static Type GetType(string url, string className)
{
Type result = null;
string @namespace = "HIIStest.UIBase.Temp.WebService";
if (string.IsNullOrEmpty(className))
{
className = WebServiceHelper.GetWsClassName(url);
}
//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, "", "");
//生成客户端代理类代码 
CodeNamespace np = new CodeNamespace(@namespace); 
CodeCompileUnit ccu = new CodeCompileUnit();
ccu.Namespaces.Add(np);
sdi.Import(np, ccu);
//获取c#编译器的实例 
CodeDomProvider provider = CodeDomProvider.CreateProvider("C#"); 
//设定编译参数 
CompilerParameters param = new CompilerParameters();
param.GenerateExecutable = false;
param.GenerateInMemory = true;
param.ReferencedAssemblies.Add("System.dll");
param.ReferencedAssemblies.Add("System.XML.dll");
param.ReferencedAssemblies.Add("System.Web.Services.dll");
param.ReferencedAssemblies.Add("System.Data.dll");
//编译代理类 
CompilerResults cr = provider.CompileAssemblyFromDom(param, 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;
//反射获取类型 
result = assembly.GetType(@namespace + "." + className, true, true);
return result;
}

/// <summary>
/// 依据类型创建实例
/// </summary>
/// <param name="t">类型(Type)</param>
/// <returns>类型实例</returns>
private static object CreateInstance(Type t)
{
//获取类型的默认值 
object result = null;
try
{
//创建实例类型 
result = Activator.CreateInstance(t);
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
return result;
}

/// <summary>
/// 给实例对象属性赋值
/// </summary>
/// <param name="InstanceObject">对象实例</param>
/// <param name="valueObj">值</param>
/// <param name="t">类型</param>
/// <param name="propertyName">属性的名字</param>
private static void SetProperty(object InstanceObject, object valueObj, Type t, string propertyName)
{
//依据类型获得类型属性 
System.Reflection.PropertyInfo pi = t.GetProperty(propertyName, BindingFlags.Public);
//给实例对象属性赋值 
pi.SetValue(InstanceObject, valueObj, null);
}

/// <summary>
/// 获得类的名字
/// </summary>
/// <param name="url">网址</param>
/// <returns>类型名</returns>
private static string GetWsClassName(string url)
{
string result = string.Empty;
string[] parts = url.Split('/');
string fileName = parts[parts.Length - 1];
result = fileName.Split('.')[0];
return result;
} 
}
}

动态调用和直接服务引用有什么区别？是说动态调用只需要知道地址和方法名即可完成调用？

rabbit 发表于 2017-3-7 01:37
动态调用和直接服务引用有什么区别？是说动态调用只需要知道地址和方法名即可完成调用？ ...

是的，只需要地址，方法名和参数即可。有些情况会用到。

不错的一个服务 类

不错额~~~~~~~~~~~~~

谢谢分享！