使用HTTP GET访问方法

•使用ScriptMethodAttribute进行标记
–UseHttpGet属性设为true
•客户端使用代理的方法没有任何变化
•参数将使用QueryString进行传递
•性能较HTTPPOST方法略有提高
•一些特性略有改变
–缓存的基础

aspx

    <form id="form1" runat="server">
        <asp:ScriptManager ID="ScriptManager1" runat="server" ScriptMode="Debug">
            <Services>
                <asp:ServiceReference Path="Services/UseHttpGetService.asmx" InlineScript="true" />
            </Services>
        </asp:ScriptManager>
        
        <input type="button" value="Get Random" onclick="getRandom()" />
        <input type="button" value="Get Range Random" onclick="getRandom(50, 100)" />
        
        <script language="javascript" type="text/javascript">
            function getRandom(minValue, maxValue)
            {
                if (arguments.length != 2)
                {
                    UseHttpGetService.GetRandom(onSucceeded);
                }
                else
                {
                    UseHttpGetService.GetRangeRandom(minValue, maxValue, onSucceeded);
                }
            }
            
            function onSucceeded(result)
            {
                alert(result);
            }
        </script>
    </form>

UseHttpGetService.asmx

<%@ WebService Language="C#" Class="UseHttpGetService" %>

using System;
using System.Web;
using System.Web.Services;
using System.Web.Services.Protocols;
using System.Web.Script.Services;

[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[ScriptService]
public class UseHttpGetService  : System.Web.Services.WebService
{
    [WebMethod]
    public int GetRandom()
    {
        return new Random(DateTime.Now.Millisecond).Next();
    }

    [WebMethod]
    [ScriptMethod(UseHttpGet=true)]
    public int GetRangeRandom(int minValue, int maxValue)
    {
        return new Random(DateTime.Now.Millisecond).Next(minValue, maxValue);
    }
}

WebService方法加上    [ScriptMethod(UseHttpGet=true)]修饰即表示使用get的方法访问