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Web ASP.NET AJAX
RadTips Episode 3: Client-Side Sorting in the RadGrid
In celebration of the fact that the weekend is upon us, I'd like to leave you all with another exciting RadTips episode. This episode covers yet another client-side databinding technique: sorting. Client-side databinding is an advanced feature of the RadGrid, and something only found in the latest and greatest bits from the RadControls for ASP.NET AJAX suite. This episode walks you through how to implement sorting when using this new feature. The demo users other cool ASP.NET features like LINQ to XML and Page Methods, so be sure to check it out. As always, the video is available in WMV...August 16, 2008
by Iana Tsolova
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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...August 14, 2008
by Iana Tsolova
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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...August 13, 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")); ...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...August 08, 2008
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