Web Service

最新推荐文章于 2025-04-27 09:34:53 发布

转载最新推荐文章于 2025-04-27 09:34:53 发布 · 363 阅读

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#service #web #webservice #server #button #textbox

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一、Web Service是一段内含某种特定功能或商业逻辑（例如：股票报价、身份证号码、信用卡检验等），并允许远程对象通过HTTP来启动和调用，如：在A机器上调用B机器上HelloWorld对象的SayHelloWorld方法。

<%@ WebService Language="C#" Class="HelloWorld"%>
    using System.Web.Services;
    Public class HelloWorld:Inherits WebService{
    [WebMethod]public string SayHelloWorld()
    {
        Return("HelloWorld");
    }
}
    之后直接放在虚拟目录下就可运行，用.asmx?wsdl 可以看到Web Service 的XML文件。

二、上面例子的简单调用

<Script Language="C#" runat="Server">
public void Page_Load(object sender,EventArgs e)
{
    HelloWorld myHelloWorld=new HelloWorld();
    string sReturn=myHelloWorld.SayHelloWorld();
    Lable1.Text=sReturn;
}
</Script>
三、另外一个例子
<%@ WebService Language="C#" Class="MathService"%>
using System;
using System.Web.Services;

public class MathService
{
    [WebMethod]
    public int Add(int a,int b)
    {
        return a + b;
    }

    [WebMethod]
    public int Substract(int a, int b)
    {
        return a - b;
    }

    [WebMethod]
    public int Multiply(int a , int b)
    {
        return a * b;
    }

    [WebMethod]
    public int Divide(int a , int b)
    {
        if (b==0) return -1;
        return a / b;
    }
}
调用这个web service
<@ Import Namespace="MathServiceSpace">
<script language="C#" runat="server">
    int Operand1 = 0;
    int Operand2 = 1;
    public void Submit_Click(object sender,EventArgs e)
    {
        try
        {
            operand1= Int32.Parse(Operand1.Text);
            operand2= Int32.Parse(Operand2.Text);
        }
        catch (Exception)
        {
            Result.Text="数字初始化错误";
        }
        MathService Service=new MathService();
        switch (((control)sender).ID)
        {
            case "Add":
            Result.Text="计算结果："+Service.Add(operand1,operand2).ToString;
            break;
            case "Subtract":
            Result.Text="计算结果："+Service.Subtract(operand1,operand2).ToString;
            break;
            case "Multiply":
            Result.Text="计算结果："+Service.Multiply(operand1,operand2).ToString;
            break;
            case "Divide":
            Result.Text="计算结果："+Service.Divide(operand1,operand2).ToString;
            break;
        }
    }
</script>
<html>
<body>
<form runat="server">
Operand1：<asp:TextBox id="Operand1" runat="server"/><br>
Operand2；<asp:TextBox id="Operand2" runat="server"/><br>
<input type="button" id="Add" value="Add" OnServerClick="Submit_Click" runat="server"><br>
<input type="button" id="Subtract" value="Subtract" OnServerClick="Submit_Click" runat="server"><br>
<input type="button" id="Multiply" value="Multiply" OnServerClick="Submit_Click" runat="server"><br>
<input type="button" id="Divide" value="Divide" OnServerClick="Submit_Click" runat="server"><br>
<asp:Label id="Result" runat="server"/>
</form>
</body>
</html>