Performance: Using LoadControl In For-each?
Oct 12, 2010
I'm trying to make a decision about how to display my data. What I have now is a list of products displayed in a repeater. But for code-maintenance I've put my product items in a seperate usercontrol and loading them in a loop with db results using LoadControl.The product control itself is very simple, just a few public properties like title, url, rating but I'm not sure if this will affect my performance. I did some reading here and on forums and some people say it's not the best practice especially if you have more then 20 or 30 of these controls. So, is it really a performance hit using this method or does it stay ok with around 10.000 hits a day.
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Sep 20, 2010
I have developed a website in asp.net framework 2 . This website is being hosted in two different servers without any change in code. My issue is about the performance of these 2 sites. One website is taking much time for inserting datas to the DB (SQL server 2005). 2 websites are having different DB server.
I think the issue is for the DB server. How can we rectify the DB performance while insertion and Is there any other cause for this permance issue?
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Apr 29, 2010
I am not sure if this is the right forum. I can not find a forum for LINQ.
I am working on an application using LINQ. Application performance is not up to par and my tests show that it is LINQ queries that are slow. I was wondering if anybody can recommend where I can find an article about optimizing LINQ performance maybe by compilation or other methods.
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Jun 30, 2011
I have a usercontrol that I load dynamically:
Code:
Sub PageLoadEvent()
Dim ctlIntrotext As Control = LoadControl("tryktabKapacitet.ascx")
plh1.Controls.Add(ctlIntrotext)
End Sub
and then adds the sub to the Page_load, that works fine.However:
1) How do I call subs from the usercontrol?
2) How do I add the OnClick-events which I normally have in the webform source, see example...
Code:
<uc9:TryktabKapacitet ID="TryktabKapacitet1" OnBtnNulstilClick="TryktabKapacitet1_BtnNulstilClick" OnSetAllModulesK="TryktabOptimering1_SetAllModules"
OnSetOneModuleK="TryktabOptimering1_SetOneModule"
OnBtnClick="TryktabOptimering1_BtnClick" runat="server"></uc9:TryktabKapacitet>
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Nov 26, 2010
Is it possible to LoadControl in windows application? I have email generation as web, but I want to move it to windows service for monthly newsletter.
Emails now are implemented as UserControls, in this way html person can easily modify look & feel.
Current rendering implementation looks like:
StringBuilder sb = new StringBuilder(4000);
StringWriter sw = new StringWriter(sb);
HtmlTextWriter htw = new HtmlTextWriter(sw);
Page page = new Page();
EmailTemplateBase emailCtrl = (EmailTemplateBase)page.LoadControl(
"Controls/EmailTempaltes/Template.ascx");
// Exception here
emailCtrl.DataContext = dataContext;
emailCtrl.Parameter = parameter;
emailCtrl.RenderMode = renderMode;
emailCtrl.DataBind();
emailCtrl.RenderControl(htw);
subject = emailCtrl.Subject;
string MessageText = sb.ToString().Replace(" ", "").Replace(Environment.NewLine, "");
return MessageText;
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Mar 31, 2011
I'm developing a stand-alone ASP .NET component for dropping in to various sites we create.
Part of the application is a CompositeControl, which needs to load a UserControl.
However, CompositeControl has no LoadControl() method - in stead, I must (as far as I can see?) rely on Page.LoadControl() and this is a problem! How do I know the path to my control, when the page is not part of the assembly?
The page the CompositeControl is situated on resides outside the assembly I am writing the Page.LoadControl() code in, and thus cannot find my .ascx file.
I've tried LoadControl(type, object[]) but this doesn't load the "code infront" file, which I need.
So - how do I find the Path to some .ascx file inside some included assembly (name known, ofc) for my Page.LoadControl? Or, alternatively, is there some other way to load the control from inside the CompositeControl?
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Mar 20, 2011
I am creating a service oriented application where trying to have everything using services....however there is something I am not sure of , I am having a page that calls the database at the page load...so what would be better and faster?? to call database in pageload , or to call wcf service from javascript during javascript load ??btw , I am using a repeater in the page , but I have created somekind of an engine to create the suitable html so...I'll be creating the repeaters html using the wcf and resend it back to the page If I am using a wcf service at the start.
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Jan 20, 2010
In the past I've used UserControls to create email templates which I can fill properties on and then use LoadControl and then RenderControl to get the html for which to use for the body text of my email. This was within asp.net webforms.
I'm in the throws of building an mvc website and wanted to do something similar. I've actually considered putting this functionality in a seperate class library and am looking into how I can do this so that in my web layer I can just call EmailTemplate.SubscriptionEmail() which will then generate the html from my template with properties in relevant places (obviously there needs to be parameters for email address etc in there).
I wanted to create a single Render control method for which I can pass a string to the path of the UserControl which is my template. I've come across this on the web that kind of suits my needs:
[code]....
Does that make sense? I was just wondering if this is at all possible in the first place and how I'd implement it? I'm not sure if it would be possible to map the properties set on 'object' to properties on the loaded user control and if it is possible where to start in doing this?
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Mar 28, 2011
We use Page.ParseControl to interpret a string of XML into controls. Does it use some kind of caching mechanism? If not - is there a way to cache its result?
Page.LoadControl seems to support some sort of caching.
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Jul 25, 2010
I need from a ascx (control_A) load dynamically another user control (Control_B), for do that I use LoadControl passing parameters to the control_B's constructor, in this way:
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Jan 5, 2010
I have a dynamically created user control which is accomplished usingLoadControl().
When I debug, the LoadControl call is called once, however the Page_Load inside the user control is called twice. On each occasion, the postback property is false, so it seems somehow the Page_Load event is called outright 2 times and nothing to do with any postback?
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Feb 6, 2010
Here is what I am trying to do. I have a page with two link buttons and an updatepanel (the two linkbuttons trigger the updatepanel). I have two usercontrols which have labels with same ID's. When I click the first link button, I add the first usercontrol to the updatepanel and set the label value to datetime.now
if i click the second link button i see that the value of the label from the first control is set in the label in second user control. if the id's are different there is no problem - but in my case the usercontrols are being developed by different teams and I am integrating them in the way i mentioned - so they may have same ids.
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Nov 1, 2010
I created a user control, then use LoadControl to call the user control in a web form. Everything is working fine on my computer. When my work is copied to another developer's computer, the content of the user control does not show. All other pages are working fine.
The only difference I could think of between my computer and another computer is the other computer use ajax-created master page. But this web form that calls the user control does not use any master page.
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Mar 10, 2010
I am running into a weird issue. Please follow the comments in the attached code, along with the code.
Basically - I am trying to let a dynamic control class decide on what its javascripts are and what it wants to send to the browser.
But for some reason, this is not working - the javascript is not getting written to the browser page after the post back, even though I see the dynamic control on the browser page.
Here is the code snippet:
[Code]....
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Mar 27, 2010
<% @
Register
src="myControl2.ascx"
tagname="myControl2"
tagprefix="uc4" %>
Page_Load(object sender,
EventArgs e)
{
myControl2 mc = new myControl2();
//is there anything wrong with the preceding way? Why ever use LoadControl?
Control myLC = LoadControl("myControl2.ascx");
//Why ever do it the LoadControl way?
}
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May 20, 2010
I am working on an ASP.NET 3.5, C#, ASP.NET AJAX, JQUERY web application which currently is having some performance issues. I have a screen with the forms view control and when I edit the form and save it for the first time the POST takes 4.89 seconds and when I perform the same operation again for the second time the POST only takes 1.09 seconds. What could be the reason for this strange behavior?
Note: I am using firebug and I am disregarding the page resources (like js, images) load time.
EDIT: I am using the Web Deployment Project to precompile the application.
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Mar 14, 2011
I'm now getting into EF and from what I'm seeing so far, I wouldn't have to worry about writing stored procedures any more. Looks like EF takes care of all of that -- including INSERT's that store data in multiple tables. One of the things they taught us when learning stored procedures was that they're compiled which has performance benefits. How does EF 4 fare against using stored procedures?
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Feb 16, 2011
I have developed a gridview which has displays 8,000 records. However, the user is compaining that it is too slow. A major function of this gridview is to filter on two of the columns. It seems to me that if the records were stored in memory it would be much faster. This is caching, I think. Is that the case? Since filtering is being done I don't think custom paging will help much. When they submit a filter, with custom paging wouldn't the entire table be read again? So I was thinking of trying caching which is available on SQL Server. Am I on the right track? Can you cache with an Access database? Can you think of any other ways to improve performance of a gridview?
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Jul 29, 2010
I did not post this in database forum because the data will run on an asp.net site.I have 3 solution in my mind and i would like some opinions.What i want to do is create a parent-child relationship on 2 controls.A listbox and a textbox.I will populate the listbox with data(this is taken care of so ignore) and what i want to do is when i click on an item in the listbox then the textbox to show it's joined related item(one item only).This is not a problem in windows forms app but in asp, since i'm new i don't know what would be better for a faster retrieval on the page.So the 3 options i have in mind are:
1)DAL.The standard create a query and let one @parameter wait for the id.
2)ADO.NET with possibly an sqldatasource.In standard forms i would have chosen simple ado.net but in asp?So either constantly open,close the db and retrieve the item or use an sqldatasource and chance the parameter.
3)Asynchronous handler page.Bind the textbox to an asynchronous page that contains the connection and expect the @id parameter.
I admit that i'm not fond of DAL but if it will boost speed then i will use it.But i have a though that says that simple ADO will be faster.
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Nov 19, 2010
I have a strange situation on a production server. Connection for asp.net get queued but the CPU is only at 40%. Also the database runs fine at 30% CPU.
Some more history as requested in the comments:
In the peak hours the sites gets around 20,000 visitors an hour.
The site is an asp.net webforms application with a lot of AJAX/POSTs
The site uses a lot of User generated content
We measure the performance of the site with a testpage which does hit the database and the webservices used by the site. This page get served within a second on normal load. Whe define the application as slow when the request takes more than 4 seconds.
From the measurements we can see that the connectiontime is fast, but the processing time is large.
We can't pinpoint the slowresponse the a single request, the site runs fine during normal hours but gets slow during peak hours
We had a problem that the site was CPU bound (aka running at 100%), we fixed that
We also had problems with exceptions maken the appdomain restart, we fixed that do
During peak hours I take a look at the asp.net performance counters. We can see behaviour that we have 600 current connections with 500 queued connections.
At peak times the CPU is around 40% (which makes me the think that it is not CPU bound)
Physical memory is around 60% used
At peak times the DatabaseServer CPU is around 30% (which makes me think it is not Database bound)
My conclusion is that something else is stopping the server from handling the requests faster. Possible suspects:
Deadlocks (!syncblk only gives one lock)
Disk I/O (checked via sysinternals procesexplorer: 3.5 mB/s)
Garbage collection (10~15% during peaks)
Network I/O (connect time still low)
To find out what the proces is doing I created to minidumps.
I managed to create two MemoryDumps 20 seconds apart. This is the output of the first:
!threadpool
CPU utilization 6%
Worker Thread: Total: 95 Running: 72 Idle: 23 MaxLimit: 200 MinLimit: 100
Work Request in Queue: 1
Number of Timers: 64
and the output of the second:
!threadpool
CPU utilization 9%
Worker Thread: Total: 111 Running: 111 Idle: 0 MaxLimit: 200 MinLimit: 100
Work Request in Queue: 1589
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Nov 12, 2010
Performance testing best practices for an ap .net application
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Jan 12, 2010
I'm trying to add some performance counters to my asp.net website. Now, I know how to increment/decrement some custom counter I make .. but my problem is that if I get my ASP.NET website to create these counters, if they do not exist (eg. i do this check in the global.asax App start method) then add/create them.
But, it doesn't work - access to the registry is denied/forbidden.
I'm assuming this is because the asp.net process is so stripped down (for security) that u can't touch that type of thing. Therefore, i'm wondering if the only other solution is to make a quick console or winform app which does one thing -> add's the perf counters. running this as my normal logged in user would me i have admin rights, so it will work. or is there something else i can do?
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Apr 6, 2010
Does it have any major effect on performance/ memory if my web.config is really huge (say, 1000+ entries in <appSettings>)? Is it a good idea to maintain a different custom xml config file for all business specific settings for my app?
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Sep 9, 2010
I am using ASP.NET AJAX Autocomplete to load the data. I am fetching data from a Dataset, which is store in Session. The table length is approx 1000 rows.I use DataView to and Table.Select ("Data Like '"+ inputvalue +"'") to filter data on each keystroke.I am wondering, what's the best and fastest way to store and fetch data for Autocomplete?
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Sep 7, 2010
Does Modelbinding increase performance that much? I have a large table which I have split into 4 details/edit screens, and want to load only information that is needed on the particular screen.
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