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Now I am working with webservices.But now we are facing a problem while calling a method in webservice asynchronously from a web page.ie.when the webmethod computes the result it will not get reflected in the webform, because the page would be rendered to the client while the method processing data.Please help me to avoid this problem without using polling...........
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Is the web service call being made as the page is loading or is it being initiated by a user action on the page?
Clean code is the key to happiness.
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When you make the async call you should get an IAsyncResult you need to hang onto.
Then at the end of your.. say OnPreRender handler you grab the IAsyncResult and wait for it to finish - say myIAsyncResult.AsyncWaitHandle.WaitOne();
Now you have your data back, you have a party. Or update the fields.
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im trying to use the update panel but it updates the entire page as supposed to the update panel. i cant find what i have done wrong. can anyone help???
Many thanks in advance
====================================================================================
<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb" Inherits="_Default" %>
<%@ Register Assembly="System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35"
Namespace="System.Web.UI" TagPrefix="asp" %>
<!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>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:ScriptManager id="ScriptManager1" runat="server">
</asp:ScriptManager>
</div>
<asp:UpdatePanel id="UpdatePanel1" runat="server">
<contenttemplate>
<asp:Label id="Label1" runat="server" Text="panel Created"></asp:Label>
</contenttemplate>
<triggers>
<asp:AsyncPostBackTrigger ControlID="Button1"></asp:AsyncPostBackTrigger>
</triggers>
</asp:UpdatePanel>
<asp:Button ID="Button1" runat="server" Text="Button" />
</form>
</body>
</html>
===========================code behind================
Protected Sub Button1_Click1(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
Label1.Text = "Refreshed at " & _
DateTime.Now.ToString()
End Sub
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Hi,
This is some rather twisted MS logic. The whole idea of the UpdatePanel is to allow only parts of the web form to be posted back in order to provide AJAX functionality. However, the default behaviour of the UpdatePanel is to post the whole page back, rather than just the controls contained within it! To correct this you will need to set the following property against the UpdatePanel:
UpdateMode="Conditional"
Hope this helps...
Clean code is the key to happiness.
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 I have set it to conditional however it stll updates the whole page.
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Having spent a fair bit of time playing around and implementing AJAX solutions, I would recommend that you do not use the UpdatePanel. Even when the UpdatePanel is working as it should, the whole of the page is still posted back, which basically defeats the object of a partial postback. Tell tell signs of this can be seen with drop down lists, that even if outside of the UpdatePanel, will flicker on partial postback.
My preferred route for handling AJAX type functionality is through the use of the ScriptManager control's service references. Registreing a local web service through the ScriptManager control creates a JS web service proxy object that is very simple to use. It uses JSON encoding which means the web service response object can be easily accessed to extract the required data, and web service methods can be called as easily as Service.Method(params). You can also set up default success and failure functiojns to handle all web method responses.
Check out the following which gives somke examples of how to implement the above:
http://www.asp.net/AJAX/Documentation/Live/tutorials/ASPNETAJAXWebServicesTutorials.aspx
http://www.semenoff.dk/en/Code-Corner/ASP.Net.AJAX/WebService-From-JavaScript.aspx
Clean code is the key to happiness.
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I am working on a Home Improvements website and I want users to be able to submit articles to my site. Does CodeProject use their own custom code for article submission or do they use a third party? Can anyone recommend a good solution to use. Thanks in advance.
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Have a look at the DotNetNuke[^] framework.
Steve Jowett
-------------------------
Sometimes a man who deserves to be looked down upon because he is a fool, is only despised only because he is an 'I.T. Consultant'
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Hi all,
We received a wap site and it was done in php, I just want to find out what is needed to host a php site, currently the webserver is set up for .Net and I'm not sure how that will impact the php, do I need to make any changes on the IIS?
Thanks in advance
No matter how long he who laughs last laughs, he who laughs first has a head start!
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Thanks
No matter how long he who laughs last laughs, he who laughs first has a head start!
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hi all
I have some code but have problem when add "html" to tag div by javacript
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<script language="JavaScript" type="text/javascript">
<!--
function addEvent()
{
var strHTML = '<a href="javascript:posttreeview('39,28', '4');">demo</a>';
document.getElementById('myDiv').innerHTML = strHTML;
}
//-->
</script>
</head>
<body>
<p><a href="javascript:addEvent();">Add Some Elements</a></p>
<div id="myDiv"> </div>
</body>
</html>
But it error javacipt when click to text??
I think it error in href="javascript:posttreeview('39,28', '4');"
Some body help me ??
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Hi,
Your problems are being caused by the use of multiple ' and " characters within your strHTML variable.
var strHTML = '<a href="javascript:posttreeview('39,28', '4');">demo</a>';
The second ' within this line is interpreted as the end of the string i.e. '<a href="javascript:posttreeview(' and will therfore cause errors when attempting to process the remaining script.
To correct this issue you will simply need to break up the string as follows:
var strScript = "javascript:posttreevie('39,28', '4');";
var strHTML = '<a href="' + strScript + '">demo</a>';
Hope this helps.
Clean code is the key to happiness.
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Alternatively you can escape the quotes:
var strHTML = '
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i have created a web application for user(supplier) to view their information using my application.it does not seem to work. and i still couldnt figured out where has gone wrong.but the error given was...
The IListSource does not contain any data sources.
Source Error:
Line 14: Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
Line 15: GridView1.DataSource = supplier.retrieveSupplier()
Line 16: GridView1.DataBind()
Line 17: End Sub
Line 18: End Class 
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Did you try Googling[^] the error message to find out what it means?
Paul Marfleet
"No, his mind is not for rent
To any God or government"
Tom Sawyer - Rush
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One of my website developed on asp classics, i need to configure it on IIS 6.0
My hard drive consists on 5 drives from C to G drive, each drive on FAT#@ partition excluding D drive which is on NTFS and the IIS server also on this drive. When i configure my website on the IIS server and after installing the frontpage extension it doesn't run on the browser and says "file or directory not found on the server."
what do i do ? please help.
thank you.
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I'd google around for configuring it. I've run into this problem before and found a google search to help. I don't remember how I fixed it since it was a long time ago. 
"I guess it's what separates the professionals from the drag and drop, girly wirly, namby pamby, wishy washy, can't code for crap types." - Pete O'Hanlon
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I have to validate text entered in a TextBox with the value in a table ie a value stored in a Database.
Pls give me snippet of code how it can be done using AJAX
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Have you tried googling around?
"I guess it's what separates the professionals from the drag and drop, girly wirly, namby pamby, wishy washy, can't code for crap types." - Pete O'Hanlon
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Hi,
Is the validation you are performing a straight text comparison, or should the entered text match one of several values pulled from the database?
As you are using AJAX, if you want the validation to fire when the TextBox loses focus, then the best way to do this would be to write a custom handler that, when fired on the onblur event of the TextBox, calls a local web service that is passed the entered text. The web service can then perform some server-side validation against the database and pass back the result. If the entered text is invalid, use JavaScript to display an error icon, or whatever element is being used for validation errors. If you are using .Net 2.0 or higher then the use of the ScriptManager control to create JS web service proxy objects, makes this operation very simple.
If validation only needs to be run when the form is posted back then it would be simpler to use a custom validation control and validate the entered text when the page is posted. You simply need to put your validation logic in the server-side ServerValidate event of the custom validation control.
Hope this helps...
Clean code is the key to happiness.
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Dear all,
I have a serious problem that can't resolve.
The problem are:
1- I cann't integrate Drupal into Moodle System. (big problem)
2- But i can intergrate Moodle into Drupal System. (It's ok)
The reason i want to integrate Drupal into Moodle because
i want Moodle as a main system of Drupal.
The structure is "Drupal in Moodle.".
Please help soon.
Thanks,
Best regards,
Han 
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