一：用ASP.NET调用Web Service
打开VS2010,打开“文件-新建-网站”，选择“ASP.NET网站”
选好存储位置，语言后点击确定，进入默认页面。然后先添加Web引用，把WebService引到当前的工程里面。方法是：在资源管理器中点击右键，选择添加Web 引用，（该webservice为上一篇的例子）调出对话框：
在URL中填入，前面写好的WebService运行后浏览器上面显示的地址，点击“前往”按钮，如上图，就会显示出所引用的WebService中可以调用的方法，然后点击“添加引用”，就将webservice引用到了当前的工程里面 ，如下图，解决方案中会出现引进来的WebService文件
如果添加的是ServiceReference的服务引用，实例化服务是应该这样，如下：
hong.Service1SoapClient login = new hong.Service1SoapClient();
if (txtName.Text.Trim().Length == )
{
MessageBox.Show("请输入用户名！");
return;
}
else if (pwdInfo.Password.Trim().Length == )
{
MessageBox.Show("请输入密码！");
return;
}
我们在这就练习调用webservice的四个方法，做一个简单的调用的例子，先在网站的前台添加几个控件，代码如下：
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="WebApplication2._Default" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>Webservice调用实例</title>
</head>
<body>
<form id="form2" runat="server">
<div>
<asp:TextBox ID="Num1" runat="server"></asp:TextBox>
<select id="selectOper" runat = "server">
<option>+</option>
<option>-</option>
<option>*</option>
<option>/</option>
</select>
<asp:TextBox ID="Num2" runat="server"></asp:TextBox>
<span id = E runat = "server"></span>
<asp:TextBox ID="Result" runat="server"></asp:TextBox>
</div>
</form>
</body>
</html>
然后在后台写调用的代码，调用之前和使用其它的对象一样，要先实例化，实例化的方法是localhost.Service a =new localhost.Service();然后就可以通过a来访问WebService里面提供的方法了。在这个例子里面，动态的创建了一个button控件来触发WebService的调用，后台代码如下：
using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls; namespace WebApplication2
{
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{ //在页面加载的时候动态创建一个按钮，在它的事件里调用Webservice
Button btn = new Button();
btn.Width = ;
btn.Text = " = ";
btn.Click += new EventHandler(btn_Click);
E.Controls.Add(btn); } /// <summary>
/// 定义动态创建Button的Click事件，在这个事件中调用Webservice
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void btn_Click(object sender, EventArgs e)
{
if (Num1.Text != "" && Num2.Text != "")
{
//实例化引用的webservice对象
localhost.Service1 WebserviceInstance = new localhost.Service1();
int Oper = selectOper.SelectedIndex;
switch (Oper)
{
//通过实例化的webservice对象来调用Webservice暴露的方法
case :
Result.Text = WebserviceInstance.addition(double.Parse(Num1.Text), double.Parse(Num2.Text)).ToString();
break;
case :
Result.Text = WebserviceInstance.subtract(double.Parse(Num1.Text), double.Parse(Num2.Text)).ToString();
break;
case :
Result.Text = WebserviceInstance.multiplication(double.Parse(Num1.Text), double.Parse(Num2.Text)).ToString();
break;
case :
Result.Text = WebserviceInstance.division(double.Parse(Num1.Text), double.Parse(Num2.Text)).ToString();
break;
}
}
}
}
}
运行后可以看到效果，如下图所示，在前面两个Textbox里面输入两个操作数，在中间的下拉列表中选择操作符，然后点击“=”号，将计算的结果输出到第三个Textbox里面。
其中的报错解决
整个计算并不是在本地进行的，是在Web服务端进行计算的然后将结果通过XML返还给了调用方的，所以，在运行该程序的时候，WebService程序还必须启动，否则会报无法连接远程服务器的异常
二：winform程序调用Web Service
运行效果图：
新建一个winform项目，添加一个添加Web引用，和ASP.Net添加引用相同，使用的同样是上一篇的webservic
e
界面设计代码：
namespace winform
{
partial class Form1
{
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.IContainer components = null; /// <summary>
/// 清理所有正在使用的资源。
/// </summary>
/// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
} #region Windows 窗体设计器生成的代码 /// <summary>
/// 设计器支持所需的方法 - 不要
/// 使用代码编辑器修改此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.btnCompute = new System.Windows.Forms.Button();
this.tbNumX = new System.Windows.Forms.TextBox();
this.tbNumY = new System.Windows.Forms.TextBox();
this.tbResult = new System.Windows.Forms.TextBox();
this.label2 = new System.Windows.Forms.Label();
this.cmbWays = new System.Windows.Forms.ComboBox();
this.SuspendLayout();
//
// btnCompute
//
this.btnCompute.Location = new System.Drawing.Point(, );
this.btnCompute.Name = "btnCompute";
this.btnCompute.Size = new System.Drawing.Size(, );
this.btnCompute.TabIndex = ;
this.btnCompute.Text = "计算";
this.btnCompute.UseVisualStyleBackColor = true;
this.btnCompute.Click += new System.EventHandler(this.btnCompute_Click);
//
// tbNumX
//
this.tbNumX.Location = new System.Drawing.Point(, );
this.tbNumX.Name = "tbNumX";
this.tbNumX.Size = new System.Drawing.Size(, );
this.tbNumX.TabIndex = ;
//
// tbNumY
//
this.tbNumY.Location = new System.Drawing.Point(, );
this.tbNumY.Name = "tbNumY";
this.tbNumY.Size = new System.Drawing.Size(, );
this.tbNumY.TabIndex = ;
//
// tbResult
//
this.tbResult.Location = new System.Drawing.Point(, );
this.tbResult.Name = "tbResult";
this.tbResult.Size = new System.Drawing.Size(, );
this.tbResult.TabIndex = ;
//
// label2
//
this.label2.AutoSize = true;
this.label2.Location = new System.Drawing.Point(, );
this.label2.Name = "label2";
this.label2.Size = new System.Drawing.Size(, );
this.label2.TabIndex = ;
this.label2.Text = "=";
//
// cmbWays
//
this.cmbWays.FormattingEnabled = true;
this.cmbWays.Location = new System.Drawing.Point(, );
this.cmbWays.Name = "cmbWays";
this.cmbWays.Size = new System.Drawing.Size(, );
this.cmbWays.TabIndex = ;
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(, );
this.Controls.Add(this.cmbWays);
this.Controls.Add(this.label2);
this.Controls.Add(this.tbResult);
this.Controls.Add(this.tbNumY);
this.Controls.Add(this.tbNumX);
this.Controls.Add(this.btnCompute);
this.Name = "Form1";
this.Text = "Form1";
this.Load += new System.EventHandler(this.Form1_Load);
this.ResumeLayout(false);
this.PerformLayout(); } #endregion private System.Windows.Forms.Button btnCompute;
private System.Windows.Forms.TextBox tbNumX;
private System.Windows.Forms.TextBox tbNumY;
private System.Windows.Forms.TextBox tbResult;
private System.Windows.Forms.Label label2;
private System.Windows.Forms.ComboBox cmbWays;
}
}
后台代码：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms; namespace winform
{
public partial class Form1 : Form
{
//Sign s = new Sign();
public Form1()
{
InitializeComponent(); } private void btnCompute_Click(object sender, EventArgs e)
{
if (tbNumX.Text != "" && tbNumY.Text != "")
{
//实例化引用的webservice对象
Compute.Service1 WebserviceInstance = new Compute.Service1 ();
int a =Convert.ToInt32( cmbWays.SelectedItem.ToString().Trim().Substring(,)); switch (a)
{
//通过实例化的webservice对象来调用Webservice暴露的方法
case :
tbResult.Text = WebserviceInstance.addition(double.Parse(tbNumX.Text), double.Parse(tbNumY.Text)).ToString();
break;
case :
tbResult.Text = WebserviceInstance.subtract(double.Parse(tbNumX.Text), double.Parse(tbNumY.Text)).ToString();
break;
case :
tbResult.Text = WebserviceInstance.multiplication(double.Parse(tbNumX.Text), double.Parse(tbNumY.Text)).ToString();
break;
case :
tbResult.Text = WebserviceInstance.division(double.Parse(tbNumX.Text), double.Parse(tbNumY.Text)).ToString();
break;
}
}
}
//载入加减乘除的符号
private void Form1_Load(object sender, EventArgs e)
{
Sign add = new Sign { Name = "+", Num = };
Sign sub = new Sign { Name = "-", Num = };
Sign mul = new Sign { Name = "*", Num = };
Sign div = new Sign { Name = "/", Num = }; //cmbWays.Items.Add(add); cmbWays.Items.Add(add.Num+"---> "+ add.Name);
cmbWays.Items.Add(sub.Num + "---> " + sub.Name);
cmbWays.Items.Add(mul.Num + "---> " + mul.Name);
cmbWays.Items.Add(div.Num + "---> " + div.Name);
cmbWays.SelectedItem = add.Num + "---> " + add.Name;//去掉了空格，默认选择项 }
}
}
自定义类：
using System;
using System.Collections.Generic;
using System.Text; namespace winform
{
public class Sign
{
public int Num { get; set; }
public string Name { get; set; }
}
}