jQuery Ajax in asp.net
I'm trying to call a static method in c# using jQuery Ajax. I've tried before but now it is not working. I get error status as 200 Ok. Here is my code:
$("#btnSample").live("click", function()
{
$.ajax({
type : "POST"
, data : {}
, url : "jQueryAjax.aspx/SampleMethod"
, contentType : "application/json; charset=utf-8"
, dataType : "json"
, success : function(msg)
{
alert("Success : "+msg);
}
, error : function(error)
{
$("#lblSample").text(error.status);
}
});
});
My Server-side code is:
[WebMethod]
public static string SampleMethod()
{
return "jQuery is Super";
}
aspx for Button:
<input type="button" id="btnSa开发者_C百科mple" runat="server" value="Show What" />
I've recreated your code on my side.
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!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></title>
<script src="Js/jquery-1.4.1.min.js" type="text/javascript"></script>
<script type="text/javascript">
$("#btnSample").live("click", function() {
$.ajax({
type: "POST"
, data: {}
, url: "Default.aspx/SampleMethod"
, contentType: "application/json; charset=utf-8"
, dataType: "json"
, success: function(msg) {
alert("Success : " + msg.d);
}
, error: function(error) {
$("#lblSample").text(error.status);
}
});
});
</script>
</head>
<body>
<form id="form1" runat="server">
<asp:Label runat="server" ID="lblSample"></asp:Label>
<input type="button" id="btnSample" runat="server" value="Show What" />
</form>
</body>
</html>
That's a copy and paste. I've tested it in IE8 and it works fine.
The one change I did make was changing your success output to use msg.d This is so it outputs Success : jQuery is Super. msg would NOT cause a crash - it would just output Success : [object Object] (msg is a object that contains a string called d which the return from the static method is called).
I haven't changed your static method at all
This is in my class (remember Default.aspx)
public partial class _Default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { }
[WebMethod]
public static string SampleMethod()
{
return "jQuery is Super";
}
}
This is sitting inside my Default.aspx.cs file
I tried messing around to get a 200 OK error and the ONLY time I managed this was when I had
, contentType: "application/ json;charset=utf-8"
That has a space between the / and json.
But that isn't in your question. Maybe it is sitting in your code that way and you fixed it in the question?
One thing I see different about your script than the way I use it is wrapping the {} in the data part with quotes. Try this:
, data: "{}"
Also, This is a good article with some jquery ajax caveats: http://encosia.com/2008/06/05/3-mistakes-to-avoid-when-using-jquery-with-aspnet-ajax/
Your button is posting back instead of calling the click event. To stop the unintentional postback add e.preventDefault to your click handler. I'd also suggest not using a server side control (ie removing the runat=server) unless absolutely necessary. It just adds unneeded overhead.
I have the same problem too, but when i copy and paste the code into a new project it works fine. I think there should be something wrong with web.config
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