原文地址:http://www.singingeels.com/Articles/Using_Page_Methods_in_ASPNET_AJAX.aspx
作者:Timothy Khouri
看标题很容易联想到updatepanel方式的页面方法调用,而文中所指的是在客户端异步调用webservice的方式.而且用了很简洁的代码来说明调用的方法.
作者用一个contact us页来描述.
首先建立一个表单:
Our "Contact Us" Form In ASP.NET
<
form
runat
="server">
< asp:ScriptManager ID ="ScriptManager" runat ="server"
EnablePageMethods ="true" />
< fieldset id ="ContactFieldset">
< label>
Your Name
< input type ="text" id ="NameTextBox" />< /label>
< label>
Email Address
< input type ="text" id ="EmailTextBox" />< /label>
< label>
Your Message
< textarea id ="MessageTextBox">< /textarea></label>
< button onclick ="SendForm();">
Send< /button>
< /fieldset>
< /form>
< asp:ScriptManager ID ="ScriptManager" runat ="server"
EnablePageMethods ="true" />
< fieldset id ="ContactFieldset">
< label>
Your Name
< input type ="text" id ="NameTextBox" />< /label>
< label>
Email Address
< input type ="text" id ="EmailTextBox" />< /label>
< label>
Your Message
< textarea id ="MessageTextBox">< /textarea></label>
< button onclick ="SendForm();">
Send< /button>
< /fieldset>
< /form>
然后是webservice文件
Our Page Method Exposed to ASP.NET AJAX
using System;
using System.Web.Services;
public partial class ContactUs : System.Web.UI.Page
{
[WebMethod]
public static void SendForm( string name, string email, string message)
{
if ( string.IsNullOrEmpty(name))
{
throw new Exception( "You must supply a name.");
}
if ( string.IsNullOrEmpty(email))
{
throw new Exception( "You must supply an email address.");
}
if ( string.IsNullOrEmpty(message))
{
throw new Exception( "Please provide a message to send.");
}
// If we get this far we know that they entered enough data, so
// here is where you would send the email or whatever you wanted
// to do :)
}
}
最后是表单文件里需要调用的javascript
function SendForm() {
var name = $get( "NameTextBox").value;
var email = $get( "EmailTextBox").value;
var message = $get( "MessageTextBox").value;
PageMethods.SendForm(name, email, message,
OnSucceeded, OnFailed);
}
function OnSucceeded() {
// Dispaly "thank you."
$get( "ContactFieldset").innerHTML = "<p>Thank you!</p>";
}
function OnFailed(error) {
// Alert user to the error.
alert(error.get_message());
}
所有的一切经过原文作者描述后会发现,原来是这么简单.
using System.Web.Services;
public partial class ContactUs : System.Web.UI.Page
{
[WebMethod]
public static void SendForm( string name, string email, string message)
{
if ( string.IsNullOrEmpty(name))
{
throw new Exception( "You must supply a name.");
}
if ( string.IsNullOrEmpty(email))
{
throw new Exception( "You must supply an email address.");
}
if ( string.IsNullOrEmpty(message))
{
throw new Exception( "Please provide a message to send.");
}
// If we get this far we know that they entered enough data, so
// here is where you would send the email or whatever you wanted
// to do :)
}
}
最后是表单文件里需要调用的javascript
function SendForm() {
var name = $get( "NameTextBox").value;
var email = $get( "EmailTextBox").value;
var message = $get( "MessageTextBox").value;
PageMethods.SendForm(name, email, message,
OnSucceeded, OnFailed);
}
function OnSucceeded() {
// Dispaly "thank you."
$get( "ContactFieldset").innerHTML = "<p>Thank you!</p>";
}
function OnFailed(error) {
// Alert user to the error.
alert(error.get_message());
}
所有的一切经过原文作者描述后会发现,原来是这么简单.