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  • Web

    Internet Explorer JavaScript Performance Tip - use the "children" property

    Today I was profiling the initialization time of RadTreeView for ASP.NET Ajax and found out that the biggest bottleneck was traversing the DOM tree. The code looks something like this: //get_childListElement() returns an HTML element  var childNodes = parent.get_childListElement().childNodes;  for (var i = 0, length = childNodes.length; i < length; i++)  {       var childNode = childNodes[i];         //Perform additional initialization  }  I tested with 10000 elements and in IE7 I got about 25000ms whilst in FireFox the total time was around 33ms (Core 2 Duo @ 2.33GHz). Quite a difference if you ask me. I thought that there may be some IE specific method/property which could perform better and I dug into MSDN. And a few minutes later I found the children property!!! Apparently the children collection contains only HTML elements (whilst childNodes is full of...
    by Iana Tsolova
    August 14, 2008
  • Release

    Yet another update of RadControls for ASP.NET Ajax DynamicData support

    ASP.NET Dynamic Data has just gone official with the SP1 release of Visual Studio 2008 and .NET 3.5. We have just released updated version of our Dynamic Data bits which is tested against the official release and has few minor improvements (such as implementation of the DataControl property). Get it from here....
    by Iana Tsolova
    August 13, 2008
  • Web

    How To: RadGridView for WPF paging, sorting and filtering of 1mil. records with LINQ to SQL

    I've made small example how to perform paging, sorting and filtering directly on the data-base sever using LINQ to SQL and RadGridView for WPF. The data-base is not included however you can use the same code with any data-base with following modifications: - change the connection string in the app.config file - change the table name in BindGrid() method:     IQueryable queryable = new DataClasses1DataContext().[Your Table].AsQueryable(); - define desired total number of items per page and total page count - change the filter expression in the filter button click event handler to desired (currently Contains for Name...
    by Vladimir Enchev
    August 13, 2008
  • People

    Design Internship Program

    http://internship.dreamture.net is the new blog of this summer's design intern at the UX department here in telerik, where Dimitar Raykov will regularly upload his ongoing work on the weekly internship assignments. Following a successful attempt to accommodate an intern a couple of years ago, this summer we wanted to expand the effort with a program that gives not just a preview of an actual work environment, but also has a more academic side to it with a chance to experiment within the design practice. Before I laid out the program I did some research on existing programs elsewhere but failed to find...
    by Iana Tsolova
    August 12, 2008
  • Productivity

    Visual Studio 2008 Service Pack 1 RTM is Live!

    That's right, SP1 for Visual Studio 2008 and .NET Framework 3.5 went live today. You can read about the highlights here, or just go download the service pack and check it out for yourself. WPF designer support in the IDE and WPF performance increases in the framework were big items delivered in this service pack. Also included is the ADO.NET Entity Framework, ADO.NET Data Services, and support for SQL Server 2008. This release comes on the heels of the release of SQL Server 2008 just a few days ago....
    August 11, 2008
  • Web

    How To: RadGrid hierarchy from objects hierarchy

    Every once in a while we receive support about how to create hierarchical grid directly from objects hierarchy and I decided to post small example how to achieve this easily:   protected void RadGrid1_NeedDataSource(object source, GridNeedDataSourceEventArgs e)   {     RadGrid1.DataSource = MyList;   }   protected void RadGrid1_DetailTableDataBind(object source, GridDetailTableDataBindEventArgs e)   {     e.DetailTableView.DataSource = MyList.Find(          delegate(Master master)          {            return master.ID == Convert.ToInt32(e.DetailTableView.ParentItem.GetDataKeyValue("ID"));         ...
    by Vladimir Enchev
    August 11, 2008
  • Web ASP.NET AJAX

    RadTreeView for ASP.NET Ajax Load On Demand Modes - why so many?

    In my previous blog post I told you how the Web Service load on demand mode of RadTreeView delivers the best performance. A logical question arises - why we have the other load on demand modes (server side postback and callback) if they do not perform on par with the Web Service mode. The answer is not that obvious. The truth is every load on demand mode has its pros and cons. The following table describes visually the load on demand modes according to three criterions - performance, templates support, ease of...
    by Atanas Korchev
    August 08, 2008
  • Web ASP.NET AJAX

    Best Practices: Client-Side DataBinding with the RadGrid for ASP.NET AJAX

    I recently released the first two episodes of my new screencast series, RadTips. In these episodes I show users how to take advantage of the new client-side databinding feature of the RadGrid (only available in the Q2 2008 release of RadControls for ASP.NET). I wanted to highlight what we consider to be a best practice when using the RadGrid's client-side API to do your databinding, something I didn't do in either of the episodes. While client-side databinding can save some bandwidth and improve round-trip speeds on subsequent requests, it is actually faster to to bind data to the RadGrid on the...
    by Iana Tsolova
    August 08, 2008
  • Desktop WPF

    RadGauge for WPF

    As announced by Vladimir RadControls for WPF FUTURES suite is out and we already started to get your feedback. Vladimir and Todd have already drawn you attention to RadChart for WPF, so I decided to show you RadGauge -- another product from the same suite. You wouldn't be surprised to know that RadGauge will allow you to visualize various measurements in completely customizable manner. Here are some of the main features: Linear scales - RadGauge offers linear scales, the length or the position of the indicator over a line/bar will measure the value. There can be 4 types of indicators - elements, that point to a...
    August 07, 2008
  • Release

    SQL Server 2008 RTM Is Here!

    That's right! For those of you who have been looking forward to the RTM, the wait is over: SQL Server 2008 has finally been released. It's already available on MSDN. If you haven't played with the new version yet, there are plenty of resources to help you get started. Check out some of these videos to learn what's in the new version, or look for "Programming Microsoft SQL Server 2008 (PRO-Developer)" by Telerik's own Stephen Forte later this year. If you don't have an MSDN account and want to try out the new version, you can download the release candidate from the SQL Server...
    August 07, 2008
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