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You can then intercept the server-side click event and forward it along to the web page as a LinkClicked event Here s the code you need: protected void listContent_ItemCommand(object source, SystemWebUIWebControlsDataListCommandEventArgs e) { if (LinkClicked != null) { // Get the HyperLink object that was clicked LinkButton link = (LinkButton)eItemControls[1]; // Construct the event arguments LinkTableItem item = new LinkTableItem(linkText, linkCommandArgument); LinkTableEventArgs args = new LinkTableEventArgs(item); // Fire the event LinkClicked(this, args); // Navigate to the link if the event recipient didn't // cancel the operation if (!argsCancel) { ResponseRedirect(itemUrl); } } } Note that when you raise an event, you must first check to see if the event variable contains a null reference If it does, it signifies that no event handlers are registered yet (perhaps the control hasn t been created).

sql In this case, the state tables are created in the ASPState database and are permanent Ordinarily, the state database is always named ASPState As a result, the connection string in the webconfig file doesn t explicitly indicate the database name Instead, it simply reflects the location of the server and the type of authentication that will be used: <sessionState sqlConnectionString="data source=127001;Integrated Security=SSPI" .. /> If you want to use a different database (with the same structure), simply set allowCustomSqlDatabase to true and make sure the connection string includes the Initial Catalog setting, which indicates the name of the database you want to use: <sessionState allowCustomSqlDatabase="false" sqlConnectionString= "data source=127001;Integrated Security=SSPI;Initial Catalog=CustDatabase" .. /> When using the SqlServer mode, you can also set an optional sqlCommandTimeout attribute that specifies the maximum number of seconds to wait for the database to respond before canceling the request.

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Overall, the code-behind model is preferred for complex pages. Although the inline code model is slightly more compact for small pages, as your code and HTML grows it becomes much easier to deal with both portions separately. The code-behind model is also conceptually cleaner, as it explicitly indicates the class you ve created and the namespaces you ve imported. Finally, the code-behind model introduces the possibility that a web designer may refine the markup in your pages without touching your code. This book uses the code-behind model for all examples.

Trying to fire the event at this point will generate a null reference exception If the event variable isn t null, you can fire the event by using the name and passing along the appropriate event parameters Consuming this event isn t quite as easy as it is for the standard set of ASP NET controls The problem is that user controls don t provide much in the way of design-time support (Custom controls, which you ll look at in 27, do provide design-time support) As a result, you can t use the Properties window to wire up the event handler at design time Instead, you need to write the event handler and the code that attaches it yourself Here s an example of an event handler that has the required signature (as defined by the LinkClickedEventHandler): protected void LinkClicked(object sender, LinkTableEventArgs e) { lblInfo.

The default is 30 seconds..

Every aspx page starts with a Page directive This Page directive specifies the language for the page, and it also tells ASPNET where to find the associated code (unless you re using inline code, in which case the code is contained in the same file) You can specify where to find the associated code in several ways In previous versions of ASP NET, it was common to use the Src attribute to point to the source code file or the Inherits attribute to indicate a compiled class name However, both of these options have their idiosyncrasies For example, with the Inherits attribute, you re forced to always precompile your code, which is tedious (and can cause problems in development teams, because the standard option is to compile every page into a single DLL assembly).

Text = "You clicked '" + eSelectedItemText + "' but this page chose not to direct you to '" + eSelectedItemUrl + "'"; eCancel = true; } You have two options to wire up the event handler You can do it manually in the PageLoad event handler using delegate code: LinkTable1LinkClicked += new LinkClickedEventHandler(LinkClicked); Alternatively, you can do it in the control tag Just add the prefix On in front of the event name, as shown here: <apress:LinkTable ID="LinkTable1" runat="server" OnLinkClicked="LinkClicked" />.

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