JS调用Webservice
操作步骤:
1.新建一个WebApplication项目,取默认设置。
2.添加一个WebService,代码如下:
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using System.ComponentModel; using System.Web.Services; namespace WebApplication1 { /// <summary> /// WebService1 的摘要说明 /// </summary> [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)] [ToolboxItem( false )] // 若要允许使用 ASP.NET AJAX 从脚本中调用此 Web 服务,请取消对下行的注释。 [System.Web.Script.Services.ScriptService] public class WebService1 : System.Web.Services.WebService { [WebMethod] public string HelloWorldFun1() { return "Hello World" ; } [WebMethod] public string HelloWorldFun2( string str) { return "Hello World," +str; } } } |
3.准备好WebService后,编辑Default.aspx文件。代码如下:
<!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 runat="server">
<title>JS调用WebService</title>
<script type="text/javascript" language="javascript">
function func1()
{
WebApplication1.WebService1.HelloWorldFun1(onSuccess,onFail,'Span1');
}
function func2()
{
var txt=document.getElementById('Text1').value;
WebApplication1.WebService1.HelloWorldFun2(txt,onSuccess,onFail,'Span2');
}
function onSuccess(value,context)
{
document.getElementById(context).innerHTML=value;
}
function onFail(value)
{
alert(value);
}
</script>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server" EnablePageMethods="true">
<Services>
<asp:ServiceReference Path="~/WebService1.asmx" />
</Services>
</asp:ScriptManager>
<input id="Button1" type="button" value="button" onclick="func1()" /> <span id="Span1"></span>
<hr />
<input id="Text1" type="text" /><input id="Button2" type="button" value="button" onclick="func2()" /> <span id="Span2"></span>
</form>
</body>
</html>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>JS调用WebService</title>
<script type="text/javascript" language="javascript">
function func1()
{
WebApplication1.WebService1.HelloWorldFun1(onSuccess,onFail,'Span1');
}
function func2()
{
var txt=document.getElementById('Text1').value;
WebApplication1.WebService1.HelloWorldFun2(txt,onSuccess,onFail,'Span2');
}
function onSuccess(value,context)
{
document.getElementById(context).innerHTML=value;
}
function onFail(value)
{
alert(value);
}
</script>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server" EnablePageMethods="true">
<Services>
<asp:ServiceReference Path="~/WebService1.asmx" />
</Services>
</asp:ScriptManager>
<input id="Button1" type="button" value="button" onclick="func1()" /> <span id="Span1"></span>
<hr />
<input id="Text1" type="text" /><input id="Button2" type="button" value="button" onclick="func2()" /> <span id="Span2"></span>
</form>
</body>
</html>
操作说明:
1.页面中需要添加ScriptManager组件,然后在里面添加WebService引用声明。[这里的Pah可以换成网络上的WebService路径。]
2.将ScriptManager的EnablePageMethods属性设置为True。[这是必须的,否则JS不知道该WebService。]
3.调用的格式:namespace.class.method([param],[onsuccessJSHandle],[onfailHSHandle],context);
其中:A。context为上下文关联参数,这里设置后,在调用成功的处理函数处可以调用。
B。onsuccessJSHandle为调用成功后的处理函数。
C。onfailHSHandle为调用失败后的处理函数。
4.WebService编写时需注意:
A。WebService类前必须加 [System.Web.Script.Services.ScriptService]
B。WebService方法前必须加 [WebMethod]