C#動態調用webservice 不加web引用

1.已知webservice路徑http://hsappsuat01/sendmail/General.asmx　中有一個方法NTAcount，返回值為string

 

2.web.config添加以下語句

<appSettings>
  <add key="WSServer1" value="http://hsappsuat01/sendmail/General.asmx/>
 </appSettings>

3.在測試網站裡添加一個類WebServiceFactory.cs，代码如下：

using System;

using System.Data;

using System.Configuration;

using System.Diagnostics;

using System.Xml.Serialization;

using System.Web.Services.Protocols;

using System.ComponentModel;

using System.Web.Services;

/// <summary>

/// Summary description for WebServiceFactory

/// </summary>

[System.Diagnostics.DebuggerStepThroughAttribute()]

[System.ComponentModel.DesignerCategoryAttribute("code")]

[System.Web.Services.WebServiceBindingAttribute(Name = "WebServiceFactorySoap", Namespace = "http://tempuri.org/")]

public class WebServiceFactory : System.Web.Services.Protocols.SoapHttpClientProtocol

{

    [System.Web.Services.Protocols.SoapDocumentMethodAttribute("http://tempuri.org/NTAccount",

        RequestNamespace = "http://tempuri.org/",

        ResponseNamespace = "http://tempuri.org/",

        Use = System.Web.Services.Description.SoapBindingUse.Literal,

        ParameterStyle = System.Web.Services.Protocols.SoapParameterStyle.Wrapped)]

    public string NTAccount() //WebService.asmx中有的一個方法NTAccount

    {

        this.Url = ConfigurationManager.AppSettings["WSServer1"];

        object[] result = this.Invoke("NTAccount", new object[0]);

        return ((string)(result[0]));

    }

 }

4.調用時實例化這個類後調用方法

WebServiceFactory wsf = new WebServiceFactory();

txtNT.Text = wsf.NTAccount();

本例代码