AJAX :: Looking For A Good Guide To The Asynchronous Loading Of Data From The Database?

Mar 24, 2010

Looking for a good guide to the asynchronous loading of data from the database after 2 seconds from the page_load.I need a method that does not burden the operation site!

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MVC :: Asynchronous Ajax Partial Loading - The Page Load Slow

Feb 20, 2011

I have a MVC view using the following VM.


Currently the page load slow. I am thinking of using JQuery load and render List<A> and List<B> separately and asynchronously. Can I still use MVVM pattern? Or I had to create to controller methods returning List<A> and List<B> separately?]

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AJAX :: Asynchronous File Upload With Update Progress Using Loading Gif Image And Use Ajaxtoolkit 3.0

Apr 22, 2010

my application is running in visual studio 2005, i used ajax control toolkit for .Net framework 2.0.but now i want to use ajaxcontroltoolkit latest version which is for .net framework 3.5 in my application which is running on .net framework 2.0 and visual studio
2005.how to integrate or use ajaxcontrol toolkit ?because i have some functionality like there is one file upload control and when click button it will take 2 to 3 min for upload so
i need progress bar with loading gif file.because of asynchronous postback fileupload control has not file.so i must assign postback trigger to button if i assign postback trigger to button than loading gif or progress bar not working.so i want to use AsynchFileUpload control of newly release toolkit.

is there any way to do it? or any other way.my client also not want to switch over it's application from 2005 to 2008.My code is below

<asp:UpdateProgress ID="uppr" AssociatedUpdatePanelID="up" runat="server">
<div id="IMGDIV1" align="center" valign="middle" runat="server" style="position: relative; display:none; [code]....

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Forms Data Controls :: How To Asynchronous Loading On A Web Page

Jul 1, 2010

I have a scenario where I have two data grids (both dynamic) to be loaded onto a page. However, the data that needs to be shown on one of the grids has no dependence on the data of the other grid. So, when fetching the data, I want to fetch it in an asynchronous manner and bind that data to each of the grids individually. Currently we have a code like

GetData(ForGridOne) ;

I want to make these calls asynchronously so that in order to load the page, the time taken would be lesser. What should be the ideal way to go forward with this ? One more thing, we would be hosting the application in a portlet which doesn't support AJAX.

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AJAX ::install Guide For Newbies On Codeplex Site ?

Mar 2, 2010

I have googled,read the faq above,and none of it helps.I have downloaded the latest version of ajax control kit,and followed all tutorials on installing,the download zip file does not have any dll called 'ajaxcontrolkit.dll'in the bin folder or in any other folder , there is no vsi file in the download I got from codeplex page,http://www.codeplex.com/AjaxControlToolki in the bin folder is SDRServerControls.dll and SDRServerControls.dll which I have tried 'adding' to a new tab using browse when adding controls form within visual studio toolbox tab,there also appears to be no install guide for newbies on codeplex site or in the download zip file itself? All tutorials seem to point to ajaxcontroltoolkit.dl,but it is not in the zip file you download from the above page,which seems to be the homepage that everything points to to get started with the toolkit.

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Web Forms :: Asynchronous Loading User Controls?

Aug 20, 2010

I have 3 user controls that I have to load at the same time. They each contain a gridview that pulls data from the database. They are doing a "delay" load of the data so there is a progress bar template that shows that the data is loading however the first gridview fires and loads, then the second, then the third and I need them to all fire at the same time.

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JQuery :: Asynchronous Partial Page Loading? How To

Jul 7, 2010

I have a CRUD type page, where the user can modify an object

This page also has a JQuery Treeview (Async) , id like update part of the page depending on what the user clicks on the tree

Because its async, any postback will cause the tree to collapse - so ill like to have the ability to update the page partially

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AJAX :: Asynchronous Data Load In Dropdownlist?

Aug 20, 2010

first i'll describe my problem:

I have payment form with a clients dropdownlist that is populated from a database on form load with:

value field = clientIdtext field = nameId
<asp:DropDownList ID="selClients" runat="server">

When user makes a payment, it's necessary to chose a client from selClients, and so i get the clientsId value and build my insert SQL query.

Until here, no problems.

The problem with my UI has started since i had a lot of clients been registered: My dropdownlist became huge and it's taking too much time to load it's contents on page load. Also the dropdownlist area is taking a large area from page screen.

So i tryied a solution with jquery autocomplete plug in. I put a textbox with autocomplete for client name and another hiddenfield to receive the clientId when user select a item.

That solves both problems:

No more large amout of data loaded on page loadThe dropdownlist doesn't take a large area from page screen
But it gave me another problem!

With a textbox, there is a possibility for wrong input client name. So if i don't have a valid clientId in hiddenfield, it will generate a database INSERT exception because it doesn't respect the client table constraint:

payment table REFERS client table

I'm trying to find kind of dropdownlist where the user can type text with autocomplete. Like this, the user will be able to select only data within the possibilities of the dropdownlist and i always will have a valid clientId.

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C# - Can Retrieve Data From Server To Client During An Asynchronous Post - Back Using Ajax Library

Apr 9, 2010

ASP.NET Ajax Library provides some client-side events. For instance:

function(args) {
// handle the end of any asynchronous post-back. Every-time there's
// a server round-trip, this method will be called.

During the asynchronous post-back I want to retrieve information to the client. This information must be available in some event like the discribed above.

Does the UpdatePanel or the ScriptManager have any server-side way to retrieve data back to client during an asynchronous post-back?

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AJAX :: Display Light Box Loading Image On Page When Update Panel Is Loading

Mar 6, 2013

I have update panel on the page to avoid postback and placed a dropdownlist control within that update panel. DrodownList is filled with Category names and also it's autopostback set to True.

Now whenever dropdownlist index change's on select, untill page loads complete  data it should show mesage as "Loading.... in center and middle of the page and background should become bit transparent". And when page load completely with data then that background and message should get disappear.

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C# - Speed Up Loading Data From Database?

Aug 30, 2010

I'm using Webservice which will return the data from the database through datatable and I'll convert the datatable into byte array. In front end, I'll reconvert the bytearray to datatable and used ajaxloader to display it in the form.. It is dynamic loading. So, for each click, it is taking 10 seconds to retreive the data regardless of the size of the data. So, I used static datatable and I've loaded all data in that datatable in page load event. But, no reaction. It is taking only same time. Even, there is no data to retreive, the ajax loader is going on loading for 10 seconds. Problem is with Ajax or my webservice??

My Code for listboxclick event

protected void listboxcity_SelectedIndexChanged(object sender, EventArgs e)
string sqlvalue = string.Empty;
for (int i = 0; i < listboxcity.Items.Count; i++)


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DataSource Controls :: Asynchronous Database Hit ADO.NET?

Apr 28, 2010

I need to do a database persistence asynchronously. So am using BeginExecuteNonQuery and EndExecuteNonQuery methods.

IAsyncResult Async = cmd.BeginExecuteNonQuery(null, cmd);
int number= cmdE.EndExecuteNonQuery(result);

Now this will work if i want to update or insert. Now what i want to do is, i need to insert values in a table and i need to retreive the identity column value for the values which are being inserted. So once the values are inserted, how do i retreive the identity column value corresponding to those inserted values. Here am passing null value in BeginExecuteNonQuery method. So what change should i do to retreive the last identity value.

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ADO.NET :: Create Asynchronous Access To Database (LINQToSql)?

Mar 17, 2011

I have a store procedure as below:

using(DataStoreContext ctx = new DataStoreContext())
int value = ctx.RequestProc(filename, message).First().Result;

I would like to create Asynchronus access to database to execute this above procedure, where I am using LinqToSql.

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How Much Entity Framework Is Good For Database That Contains Tables With Large Records

Jul 28, 2010

I am working with VS 2010, Entity framework, SQl-Server 2005, ASP.Net web forms. Currently, I am working on the Data access layer library which soon will be a web service, using Entity Framework collaboration with different design patterns like repository pattern and some best practices that posts in different blogs. I am also test each repository using the Unit testing project. Thumbs up! Working fine.

The thing I am worried about is, how much is good for retrieving data from a table that can contain 80-100k records ?

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AJAX :: Ajax Tab Control In Vs 2008 - Lazy Loading Of Data?

May 7, 2010

I'm planning to fetch data to illustrate about the yearly sales achievement for last 3 years by showing seperately in grids in three different ajax tabs. i prefer to lazy loading of the data to the grid in each tab. is there a way to achieve this on the change event of the tabs.

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Guide For Creating MVC RESTful API On Azure?

Feb 15, 2010

I want to create a simple ASP.NET MVC RESTful API, but I want to create it on Azure.tips & tricks, or examples on how to do this?

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C# - Good Practice To Perform Direct Database Access In The Code-behind Of Webpage?

Jun 7, 2010

I am an experienced developer but I am new to web application development. Now I am in charge of developing a new web application and I could really use some input from experienced web developers out there.

I'd like to understand exactly what experienced web developers do in the code-behind pages. At first I thought it was best to have a rule that all the database access and business logic should be performed in classes external to the code-behind pages. My thought was that only logic necessary for the web form would be performed in the code-behind. I still think that all the business logic should be performed in other classes but I'm beginning to think it would be alright if the code-behind had access to the database to query it directly rather than having to call other classes to receive a dataset or collection back.

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Web Forms :: Start Two Asynchronous Database Access Calls That Are Executed Onto The Separate Thread?

Sep 2, 2010

i have the code for asynchronous call to the database. i execute the sql command into the begin method that will executed onto the separate thread. now i want to execute the another database call asynchronously so that this also execute onto the separate thread. code for one database cal is here....

private SqlConnection con, con1;
private SqlCommand cmd, cmd1;
private SqlDataReader dr, dr1;
protected void Page_Load(object sender, EventArgs e)
if (!IsPostBack)
AddOnPreRenderCompleteAsync(new BeginEventHandler(Begin),
new EndEventHandler(End)
/////////////BEGIN METHOD
IAsyncResult Begin(object sender, EventArgs e,AsyncCallback cb, object state)
string connect = "Data Source=.\SQLEXPRESS;Asynchronous Processing=true;AttachDbFilename=|DataDirectory|\Database.mdf;Integrated Security=True;User Instance=True";
con = new SqlConnection(connect);
cmd = new SqlCommand("SELECT FirstName,LastName,Age,Company,Profile FROM Person",con);
return cmd.BeginExecuteReader(cb, state);
void End(IAsyncResult ar)
dr = cmd.EndExecuteReader(ar);
Label2.Text = System.Threading.Thread.CurrentThread.GetHashCode().ToString();
GridView1.DataSource = dr;

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Web Forms :: Finding Guide For StaticSelectedStyle Property On Menu Control

Mar 6, 2010

I'm about another 5 hours down the road into trying to use another ASP.NET control that should be amazingly simple yet for whatever reason I can't seem to get to work.

The StaticSelectedStyle property of a Menu control as described here: [URL]

I can't make it work. I've read forum posts that say it won't work unless I bind the menu controls to a sitemap. I've done that and it doesn't work.

I've gone so far as to copy the example code on [URL] and paste it verbatum into a new aspx page in brand new projects in both VS2005 and VS2010 beta and I STILL can't get it to work (after altering the NavigateUrl of one of the menu items to be the page that the code was sitting on...e.g.


If Microsoft's own example code won't even work I'm not sure I'm feeling very hopeful here. It seems entirely stupid to have to go create my own navigation menu when the Menu control does 98% of what I need it to do (except highlight when it's on the selected page).

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AJAX :: UpdatePanel And Asynchronous Pages ?

Apr 16, 2010

Could ASP.NET AJAX UpdatePanel could be used in ASP.NET asynchronous pages ? Could Page Methods be made asynchronous also ?

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AJAX :: Asynchronous Calls To Same Method?

Mar 12, 2010

I am relatively new to asp.net. In My asp.net website, i have a method GetData(int id) which is called Repetitively, depending on id count, GetData is desinged to get data from sharepoint and sql server both. if the Id count is high say =10, my page load time increases because GetData is called 10 times and the page load time keeps adding up. so I want to ask, is there any way that this GetData() be called asynchornously or by the use of some thread, so that my page loads faster.

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Asynchronous Ajax Call Using QueryString?

Nov 23, 2010

Since i am fresher to .net, i m unable to handle asp.net. I have call asynchronous ajax call using XMLHTTPRequest and also use QueryString to filter Employee details.

I have following files:

1. Default.aspx code

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="Task2._Default" %>

<%@ Register TagPrefix="uc1" TagName="SearchResult" Src="SearchResult.ascx" %>


3. Ajax.aspx is empty in design

what should be the code in Default.aspx.cs when u take some text in textbox to search, OnClick of "ok" button there should'nt be any postback.

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AJAX :: Set A Textbox's Value Before A Asynchronous Postback?

Mar 16, 2010

Is there any way can let me set a textbox's value before the asynchronous postback. but I don't want to add a handler for a control which caused that asynchronous postback, because there are too much control can cause that. I want to know if there is a client event would be caused before the postback.

I tried the event initializeRequest of PageRequestManager to do this, but it did not work, it seems like the request has been generated when this event was executed, the value i set in this event for textbox did not be sent to server.

here is a page I used to test

<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> runat="server">


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AJAX :: Improve Asynchronous Postback Speed?

Oct 10, 2010

i am trying to increase my web based game movement system speed as much as possible.

i am using ajax asynchronous postbacks for moving on the map. (if you wanna check address [URL] )

so i am looking for all kind of tips to increase ajax asynchronous postback speed.

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AJAX :: ScriptManager Will Not Perform Asynchronous Postbacks?

Jul 14, 2010

I am trying to integrate ASP .Net AJAX into an existing application, but so far I am striking out.After significant digging, I found that for some reason, the ScriptManager was set so that SupportsPartialRendering is false, overriding EnablePartialRendering. From looking at the MSDN documentation, it seems to me that this should not be the case.The rules for determiningrSupportsPartialRendering are (from MSDN):The W3CDomVersion property value must be greater than or equal to 1.0.The EcmaScriptVersion property value must be greater than or equal to 1.0.The SupportsCallback property value must be set totrue.Using Firefox 3.6 and IE7+, these tests should have passed. W3CDomVersion = 1.0, EcmaScriptVersion=1.4, and SupportsCallback=true.n an effort to see if I could get around it by setting the value myself, I overrode the OnInit function in the code behind to explicitly set SupportsPartialRendering to true.his appeared to attempt to start an async postback, but failed with the javascript error "this._postBackSettings.async' is null or not an object" from within the ASP.Net AJAX scripts.

Also, I created a sample application outside of my existing project and got it working exactly as I wanted. When I copied and pasted all the code from the sample project and put it into the existing solution (aspx and code behind) it experienced the same issue. I know that it has something to do with the existing solution, but I am at the end of my rope as to what it could be.Other relevant information:he solution I am trying to integrate this into was at one time upgraded from ASP .Net 2.0 to 3.5.The controls which trigger the async postback are in a repeater and are being registered with ScriptManager.RegisterAsyncPostBackControl during prerender by looping over the bound items in the repeater. This occurs after the Repeater is databound. At the same time, triggers are dynamically added to the UpdatePanel. Code snippet (taken from OnPreRender):


I think the "_postBackSettings.async is null" error is something of a red-herring and is an indication that I am headed down a wormhole, so I am not considering heading down the path of forcing SupportsPartialRendering to true for now. Does anyone know what else could be turning it off in the first place? Or what else could be preventing partial rendering from functioning as expected?

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