This is My Code Default.aspx:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org
/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs"
Inherits="Sample001.Default" %>
<script src="jquery-1.6.4.min.js" type="text/javascript"></script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<table>
<tr>
<td>
<asp:Label ID="lbl1" runat="server" />
</td>
</tr>
<tr>
<td>
<asp:Label ID="masterlbl" Text="Master" runat="server" />
</td>
<td>
<span class="Mastercs">
<asp:DropDownList ID="ddl1" runat="server"/>
</span>
</td>
<td>
<asp:Label ID="slavelbl" Text="Slave" runat="server" />
</td>
<td>
<span class="slavecs">
<asp:DropDownList ID="ddl2" runat="server" />
</span>
</td>
</tr>
</table>
</div>
</form>
<script type="text/javascript">
$(document).ready(function () {
$('span.Mastercs select').change(function () {
$.ajax({
type: "POST",
url: "http://localhost/Sample001/Default.aspx/MyMethod",
data: "{}",
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function (msg) {
$('#lbl1').text = msg;
}
});
});
});
</script>
</body>
</html>
This is Web.Config:
<?xml version="1.0"?>
<configuration>
<system.webServer>
<validation validateIntegratedModeConfiguration="false" />
<handlers>
<add name="MyMethod" verb="*" path="*.assq"
type="Sample001.MyHandler,Sample001" preCondition="integratedMode" />
</handlers>
</system.webServer>
<system.web>
<compilation debug="true" targetFramework="4.0" />
</system.web>
</configuration>
And Handler:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
namespace Sample001 {
public class MyHandler : IHttpHandler {
public bool IsReusable {
get { return true; }
}
public void ProcessRequest(HttpContext context) {
context.Response.Write("Yeeeeeeeeeeeeeee Like it");
}
}
}
I can’t config IIS 7.0 Correctly as 15Seconds said, just could add my custom extention(.assq) like this:
When load the page and change Select the script don’t work
And this is My Rsponse:
Unknown web method MyMethod.
Parameter name: methodName
body {font-family:”Verdana”;font-weight:normal;font-size:
.7em;color:black;}
p {font-family:”Verdana”;font-weight:normal;color:black;margin-top: -5px}
b {font-family:”Verdana”;font-weight:bold;color:black;margin-top: -5px}
H1 { font-family:”Verdana”;font-weight:normal;font-size:18pt;color:red }
H2 { font-family:”Verdana”;font-weight:normal;font-
size:14pt;color:maroon }
pre {font-family:”Lucida Console”;font-size: .9em}
.marker {font-weight: bold; color: black;text-decoration: none;}
.version {color: gray;}
.error {margin-bottom: 10px;}
.expandable { text-decoration:underline; font-weight:bold; color:navy;
cursor:hand; }
<span><H1>Server Error in '/Sample001' Application.<hr width=100% size=1
color=silver></H1>
<h2> <i>Unknown web method MyMethod.<br>Parameter name: methodName</i>
</h2></span>
<font face="Arial, Helvetica, Geneva, SunSans-Regular, sans-serif ">
<b> Description: </b>An unhandled exception occurred during the execution of
the current web request. Please review the stack trace for more information about the
error and where it originated in the code.
<br><br>
<b> Exception Details: </b>System.ArgumentException: Unknown web method
MyMethod.<br>Parameter name: methodName<br><br>
<b>Source Error:</b> <br><br>
<table width=100% bgcolor="#ffffcc">
<tr>
<td>
<code>
An unhandled exception was generated during the execution of the current web request.
Information regarding the origin and location of the exception can be identified using
the exception stack trace below.</code>
</td>
</tr>
</table>
<br>
<b>Stack Trace:</b> <br><br>
<table width=100% bgcolor="#ffffcc">
<tr>
<td>
<code><pre>
[ArgumentException: Unknown web method MyMethod.
Parameter name: methodName]
System.Web.Handlers.ScriptModule.OnPostAcquireRequestState(Object sender, EventArgs
eventArgs) +897827
System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
+80
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean&
completedSynchronously) +270
</pre></code>
</td>
</tr>
</table>
<br>
<hr width=100% size=1 color=silver>
<b>Version Information:</b> Microsoft .NET Framework Version:4.0.30319;
ASP.NET Version:4.0.30319.237
</font>
</body>
</html>
<!--
[ArgumentException]: Unknown web method MyMethod.
Parameter name: methodName
at System.Web.Handlers.ScriptModule.OnPostAcquireRequestState(Object sender,
EventArgs eventArgs)
at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep
.Execute()
at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean&
completedSynchronously)
-->
why this code not work?
Why the response say: Unknown web method MyMethod.?
is this because of config IIS 7.0 or other thing?
KBoek help to find what’s the problem:
main one is: this 3 element cause confused jQuery:
data: “{}”,
contentType: “application/json; charset=utf-8”,
dataType: “json”,
and I remove it.
I’d rather use the following setup:
Call the following URL from JavaScript:
Then, register this URL in web.config
You don’t have to register *.assq as a MIME type in IIS.
By the way, neither your JavaScript nor your C# code present any data in JSON format. You don’t need that if you just want to return a string from the server. But of course, JSON is a good way to return a complete object to the client.
Alternatives to identify “lbl1” from Javascript