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Hi,
I'm new to AJAX and I've been going crazy trying to figure out what's stopping my controls from updating on the client side rather than just normally sending a post-back.
I have a script manager, and an UpdatePanel which contains a small form and a gridview.
Upon submitting the form, the Gridview should be updated. But it keeps on doing it on the server side.
Here's an edited part of my code:
=================================================================================
<form id="form1" runat="server">
<asp:ScriptManager
ID="ScriptManager1" runat="server" />
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:TextBox ID="TextBoxValue" runat="server"></asp:TextBox>
<asp:Button ID="Search" runat="server" CausesValidation="False" Height="22px"
onclick="Search_Click" Text="חפש" UseSubmitBehavior="False" Width="48px" />
<asp:RadioButtonList ID="RadioButtonListDic" runat="server"
RepeatDirection="Horizontal">
<asp:ListItem Selected="True" Text="1234">1234</asp:ListItem>
<asp:ListItem Text="1234">1234</asp:ListItem>
</asp:RadioButtonList>
<asp:GridView ID="GridViewResults" runat="server" CellPadding="4" ForeColor="#333333"
GridLines="None" AutoGenerateColumns="False">
</asp:GridView>
</ContentTemplate>
<Triggers>
<asp:AsyncPostBackTrigger ControlID="Search" EventName="Click" />
</Triggers>
</asp:UpdatePanel>
<asp:UpdateProgress ID="UpdateProgress1" runat="server" AssociatedUpdatePanelID="UpdatePanel1">
<ProgressTemplate>
Searching
</ProgressTemplate>
</asp:UpdateProgress>
</form>
=================================================================
As you can see, I've even tried to specificly make the Search button update.
Also I should mention that I'm using a Masterpage, with no ajax controls.
What am I doing wrong?
Many thanks,
JFord
<div class="ForumMod">modified on Saturday, December 13, 2008 12:27 PM</div>
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JFord1234 wrote: UseSubmitBehavior="False"
I am deeply suspicious of this.
I do have to wonder what % of devs in the MS world know the slightest thing about AJAX, and what % think that AJAX means a Microsoft library. There are some good books on the Microsoft AJAX library, you should consider reading one, to try to understand the stuff that it's hiding from you. You also need to get Firebug inside firefox so you can step through the client side code and get some idea of what the library is doing, so you can try to understand where it's going wrong. If you were actually using AJAX, it would be a lot easier to understand these sort of issues, because you'd actually understand what was happening.
Oh - here's something. You have onclick="Search_Click". That will be passed through to the client, and will look for a javascript method called 'Search_Click'. If you make it OnClick, then it will get hooked up to your ASP.NET server side code via postback or, hopefully, AJAX in this case.
Christian Graus
Driven to the arms of OSX by Vista.
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Thanks for the reply, Christian.
I understand your point about using Microsoft's library instead of writing in javascript. But in my defence, I'm just a high school student so I don't feel compelled to write in javascript when I have a so-called more confortable way with Microsoft Ajax Library. I looked through the code, and it looks like the AJAX library does inject some js code, but upon submitting the DoPostback function is called just as normal. I don't have the code infront of me, and I'll probably look at it again in a day. But anyway I think I'll do as you say, and study the basics so I could understand the js code, and perhaps write my own code instead of using MS as clearly less efficient for me. Thanks for all the tips, and sorry about how this message may look -it's from a cellphone.
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OK - I would suggest you look at some MS samples and trace through those to see how the AJAX library hooks into the postback mechanism. I still believe that your core issue tho is that you have onclick instead of OnClick. they are not the same thing.
Christian Graus
Driven to the arms of OSX by Vista.
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Hi there coders,
Im developing a YouTube like website in asp.net and ive run in into a major huddle. The prototype worked great and used a Windows media player control and a generic handler to play videos from an SQL database. However the client insisted that i use a flash FLV video player instead.
So I replaced wm player with a flash flv player, and wmv videos with flv videos and finally changed the mime type in the handler to "video/x-flv".
But the videos are not playing. Any suggestions?
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Fix your code. Not sure what else to say, based on this. You've not given us much to go on. I would, in your shoes, put one of these videos in a folder, create a htm file that embeds the player, and get that working 100%, then I'd build on that until I got to the point of working out what step is not working properly, so I could better define what the problem is.
Christian Graus
Driven to the arms of OSX by Vista.
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Hi All,
I need some help understanding HTTP Modules a lot better.
At the moment I understand creating the Init and Dispose functions and
making the Init function include an event handler.
Its only in the Event handler that I am clueless as to the logic
of getting something to work for you. I am aware of the events available at ones disposal. However can someone explain what goes on in the event handler. I have looked at existing examples of what handlers might be used for but am clueless about the logic.
Thanks very much
public class Module:IHttpModule
{
public void Dispose()
{
}
public void Init(HttpApplication context)
{
app.BeginRequest += new EventHandler(OnBeginRequest);
}
// event handlers
public void OnBeginRequese(object o, EventArgs ea)
{
//Here is what I have no idea what to do.
}
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Check this link i think it'll solve all you queries
[^]">
Cheers!!
Brij
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Wow! Thanks dude. Your a champion!
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any one can tell me how to roll images in asp.net
like in kellko site
link of sit:-http://www.kelkoo.co.uk/
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lavesh21291 wrote: any one can tell me how to roll images in asp.net
I didn't get your point. What do you mean by roll image ? Is some thing animated/ One after another ?
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Yes,
when u will go in site of kelkoo thr will be tht rolling.
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abhijit will u tell me how to roll tables instead of img as in site there are the links and the advertisement.
thanks in advance
<div class="ForumMod">modified on Monday, December 15, 2008 3:42 AM</div>
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Hi,
I am using VS 2005. I developed an application recently and my management wants to take a print out of a particular dataentry form. I wanted to do it using crystal reports. How can it be done?
Thank you
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Any one can tell me tht how to disply img in gridview frm sqltable.
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Yes, by writing code. Why is it you people say 'urgent', but you're too lazy to google ?
If the image is in the DB, then you need to write a page that takes an image id on the URL, and returns the image data, then this can be the url for an img tag.
Christian Graus
Driven to the arms of OSX by Vista.
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May be he needs an asp:imagefield? not sure if he means it really.
OK,. what country just started work for the day ? The ASP.NET forum is flooded with retarded questions. -Christian Graus
Best wishes to Rexx[^]
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how to display img if the img is stored in sqldatabase
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Hi guys,
I have been doing a lot of work with stress testing ASP.NET applications recently and some of our production systems appear to be highly in-efficient and slow even after logically partitioning pages into user controls and enabling caching. I've followed the MSDN ASP.NET Performance Best Practices religiously and I think my data bound server controls might be the problem (Grids, Trees, etc, etc) which is causing my Pages Per Second, TTFB, and TTLB values to be so poor; some of my pages take up to 30000ms (30sec) to get to TTLB!
I have replaced several server controls with their HTML/JS counterparts (replacing GridViews/DataLists with tables & using Javascript to handle sorting, parsing, etc).
I'd like to extend these client-only HTML/JS controls to support features like data paging but in order to do that I think I'm going to have to do some kind of transformation of the data to XML so javascript can do the paging. I can't help but think that the overhead involved with running SQL queries, transforming the data to XML, and sending the XML to the client would be as slow (or slower) as using a server GridView control with an ObjectDataSource because the GridView doesn't have to do the XML transformation or send this extra data to the client.
My question is this, if I execute a SQL query that returns 1000 rows and I intend on displaying 10 rows at a time in a table with a pager (10 pages) do I have to send the whole xml file to each browser client and if so, then even though the user experience might be more rich, wouldn't this kind of contradict the whole concept of performance tuning and optimization?
Am I approaching this performance tuning wrong? Can I expect a significant improvement in ASP.NET application responsiveness by replacing all the built-in server controls with HTML/JavaScript controls?
I'm rambling now, but any help the experts can provide on this matter would be highly appreciated.
Thanks!
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thund3rstruck wrote: slow even after logically partitioning pages into user controls
User controls make things easy to code, they don't make them fast.
thund3rstruck wrote: I have replaced several server controls with their HTML/JS counterparts (replacing GridViews/DataLists with tables & using Javascript to handle sorting, parsing, etc).
Well, this is just reinventing the wheel.
thund3rstruck wrote: I think I'm going to have to do some kind of transformation of the data to XML so javascript can do the paging
you're wrong. Really, paging should happen from the DB, otherwise you're asking for data you don't show, which is a major bottleneck, esp as your DB grows.
thund3rstruck wrote: My question is this, if I execute a SQL query that returns 1000 rows and I intend on displaying 10 rows at a time in a table with a pager
If you do this, you're being incredibly inefficient.
thund3rstruck wrote: do I have to send the whole xml file to each browser client
You should avoid sending data you don't want to display. You should avoid even asking the DB for it.
thund3rstruck wrote: wouldn't this kind of contradict the whole concept of performance tuning and optimization?
Yes.
thund3rstruck wrote: Can I expect a significant improvement in ASP.NET application responsiveness by replacing all the built-in server controls with HTML/JavaScript controls?
No. You're taking their HTML and Javascript and replacing it with your own. They tested theirs more.
Christian Graus
Driven to the arms of OSX by Vista.
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Did you just delete a "Help" somewhere? 
OK,. what country just started work for the day ? The ASP.NET forum is flooded with retarded questions. -Christian Graus
Best wishes to Rexx[^]
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