Hot ASP.NET (C# & VB.NET) How-Tos
How To: Implement tracing in an ASP.Net website
In this video tutorial, Chris Pels will show you how to implement tracing in an ASP.NET web site to monitor or measure the performance and to diagnose errors. Learn how to add tracing to an entire web site as well as individual pages. See how to add custom trace messages in pages and business objects to aid in assessing site performance and in diagnosing errors. Learn the differences between tracing in an ASP.NET page and in using System.Diagnostics.Trace for tracing information in business o...
How To: Save and load view state info for a custom web server
In this video tutorial, Chris Pels will show how to persist and restore information in the ViewState of a custom user control. First, learn how to persist simple values containing .NET primitive types such as String, Int32, Boolean, etc. Then see how to persist complex types such as Class which contain properties storing information. The sequence of processing View State information during the lifecycle of an ASP.NET page is also discussed.
How To: Declaratively and programmatically use master pages
In this video tutorial, Chris Pels will show several aspects of defining and using master pages in an ASP.NET web site. First, see how to create master pages declaratively using the ASP.NET master page model and learn what information is best suited to a master page compared to an individual content page. Next, see how to programmatically assign master pages on-the-fly in an individual content page. Also learn how to create a base page class which assigns a master page programmatically for al...
How To: Handle events in master and content pages on ASP.Net
In this video tutorial, Chris Pels will show how events are handled in master and individual content pages. Even though the end result of a master and individual content page is a single ASP.NET page rendered in the user's browser the event handling in each type of page is handled separately. If a control is located in the master page the corresponding event handler is located in the master page by default. The same is true for controls in the content page. See two approaches to having the ev...
How To: Create and use application level events in ASP.Net
In this video tutorial, Chris Pels will show how to create an Application Class File (Global.asax) that contains application level event handlers such as Application_Start and Application_BeginRequest. Then the sequence of application level events in the application lifecycle will be discussed as a basis for determining where certain types of operations would be best performed during the application lifecycle.
How To: Use the ObjectDataSource for ASP.Net
In this ASP.Net video tutorial, Chris Pels will show how to use the ObjectDataSource as the intermediate layer between data bound user interface elements and a custom data access class for a business object. Uses of the ObjectDataSource in the GUI Design mode and declaratively in the source view of an .aspx page are discussed. In addition, the considerations for design of the data access class and business object for use with the ObjectDataSource are covered. Use the ObjectDataSource for ASP....
How To: Share data between client JavaScript and server code
In this video tutorial, Chris Pels will show how to share data in between JavaScript and server-side code by using a hidden field in an ASP.NET page. Next, learn how to use the RegisterHiddenField method in server-side code to programmatically create a hidden field on the client. In addition, see how to programmatically create a HiddenField server control for sharing data on an ASP.NET page. Finally, use the RegisterArrayDeclaration method to create a container in server code for storing mult...
How To: Add JavaScript to an ASP.Net page
In this video tutorial, Chris Pels will show how to include JavaScript to an ASP.NET page for use on the client page to provide a richer and more robust user experience. First, see how to include JavaScript directly within an ASP.NET page and reference the script from within HTML page elements. Next, see how to abstract the JavaScript to an external JavaScript file which offers the advantage of being cached by the browser and can be used by multiple pages. Lastly, learn how to add JavaScript ...
How To: Upload simple and multiple files in ASP.Net
In this four-part video tutorial, Joe Stagner will demonstrate, using ASP.NET, uploading a single file from the client machine to your server.
How To: Create and call a simple web service in ASP.Net
In this video tutorial, Chris Pels will show how to create a web service in ASP.NET and then call the service from another ASP.NET web site. First, learn how to create an .asmx component which represents a web service in an ASP.NET web site. When creating the web service learn how to control several aspects of the web service functionality with web service attributes. Next, see how to test the web service in the Visual Studio web service test page. Then learn how ASP.NET allows many .NET data...
How To: Deploy a website using the ASP.Net copy website tool
In this video tutorial, Chris Pels will show how to deploy a web site using the Copy Web Site Tool in Visual Studio. First see how to connect to a remote web site and deploy an entire site to the target location. Next, learn how to synchronize an entire source and target web site. In addition, see how to copy and synchronize individual or groups of files including how the Copy Web Site tool provides status indicators of differences between files. As part of this process see how the tool provi...
How To: Use a custom config section in an ASP.Net config file
In this video tutorial, Chris Pels will show how to extend the standard set of ASP.NET configuration settings with your own XML configuration elements. First, see how to create a configuration section handler which is required to interpret and process the information in custom XML configuration elements. During this learn how to use declarative model for defining the behavior of a configuration section handler. Next, see how to add a custom section handler and custom elements to an ASP.NET co...
How To: Configure an ASP.Net site for a .Net Framework version
In this video tutorial, Chris Pels will show how to configure an ASP.NET web site to use a specific version of ASP.NET/.NET Framework. First see how to identify what version of the .NET Framework a web site is associated with by viewing the script map in Internet Information Server (IIS). See how a script map is associated with the root in IIS and then with individual web sites. Next learn about the ASP.NET IIS Registration tool (aspnet_regiis.exe) used to configure IIS or an ASP.NET web site...
How To: Map an ASP.Net server control to the render adapter
In this video tutorial, Chris Pels will show how to use a control adaptor to provide different renderings for an ASP.NET server control without actually changing the control itself. In this video, an ASP.NET BulletList control will be adapted to display each list item horizontally using div elements instead of the traditional ul elements. First, see how to create a class that inherits WebControlAdaptor and then implements the code to render the new list format. Next, learn how to map the new ...
How To: Use the IIS registration tool to configure ASP.Net
In this video tutorial, Chris Pels shows how to use the ASP.NET IIS Registration Tool to configure ASP.NET. First, see how file extensions are mapped to ASP.NET in the IIS Manager on a global and web-site-by-web site basis. These script maps provide the basis for configuring individual ASP.NET applications to run under a specific version of the .NET Framework. Next, see how aspnet_regiis.exe, the IIS Registration Tool command line utility, is specific to each version of the .NET Framework and...
How To: Extend and customize an ASP.Net server control
In this video tutorial, Chris Pels will show how to extend a standard ASP.NET server control and customize it for a specific purpose. Specialized controls provide an convenient way to implement standardized user interface elements for multiple web sites for individuals or teams of developers. In this example, see how to extend the DropDownList control to create a special purpose year selection control. Learn how to add properties for custom attributes that control the behavior of the range of...
How To: Create groups with listview control for different data
In this video tutorial, Chris Pels will show how to group items when displaying data in a ListView control. First, see the basics of item layout in the ListView control with the LayoutTemplate and the ItemTemplate. Then, learn how the GroupTemplate relates to the LayoutTemplate and ItemTemplate within a ListView to establish a group of data. See how to use floating DIV elements to create a flexible tabular layout since any of the templates used with the ListView can contain any HTML. This pro...
How To: Make HTML elements accessible from server side code
In this video tutorial, Chris Pels will show how to make standard HTML elements in an .aspx page accessible from server side code so they can be used in page processing like a standard ASP.NET server control. First, see how the addition of a runat=”server” attribute to a standard HTML control like a div allows it to be referenced in server side code with full Intellisense. Next, see several examples of how you might manipulate HTML elements on a page with this technique. Lastly, see how this ...
How To: Create standard content layouts by nested master pages
In this ASP.Net video tutorial, Chris Pels will show how to use nested master pages to create individual master pages that represent different standard content layouts for a web site. First, see how several major commercial web sites use a standard set of content layouts. Next, see how to nest a master page within another master page, and use the design time support in Visual Studio 2008. Then, learn the considerations for establishing a “page architecture” which represents the major types of...
How To: Detect browser capabilities in ASP.Net web pages
In this video tutorial, Chris Pels will show how to determine what capabilities a user’s browser has when viewing pages in an ASP.NET web site. First, learn how to access an instance of the HttpBrowserCapabilities object from the ASP.NET Request object associated with the web page request. Next, see the different information available in the HttpBrowserCapabilities object such as the type of browser and whether the user’s browser supports JavaScript and Cookies. Then see an example of how to ...
How To: Pass info from one page to another with a query string
In this video tutorial, Chris Pels will show how information can be passed from one page to another using a query string. First, see how to construct a query string including variable names and values from information on a data entry form. Next, see how to access the query string information when the page is posted including how multiple query string variables are handled. As part of the server side processing of query string information, see how to implement validation for existence of query...
How To: Use the aspnet_merge.exe utility to merge assemblies
In this video tutorial, Chris Pels will show how to use the aspnet_merge.exe utility to combine assemblies that have been compiled using the aspnet_compiler.exe utility. First, view the output of the ASP.NET compilation process to learn what assemblies are created. Next, learn the mechanics of using the aspnet_merge.exe utility to merge assemblies from the compilation of a web site, first seeing how to control the compiled assembly names with the –prefix option. Then see how to merge all the ...
How To: Implement a cross page Postback in ASP.Net
In this video tutorial, Chris Pels shows how to create a Cross Page PostBack in ASP.NET, where a control on a source page raises a PostBack event to a different target page. First, learn how to configure a Button control to PostBack to a different target page. Then, learn how to get information from controls on the source page with the PreviousPage property and the FindControl method. Then, learn how to use public properties on the source page to expose data to the target page, and learn how ...
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