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The Wizard control is a more glamorous version of the MultiView control. It also supports showing one of several views at a time, but it includes a fair bit of built-in yet customizable behavior, including navigation buttons, a sidebar with step links, styles, and templates. Usually, wizards represent a single task, and the user moves linearly through them, moving from the current step to the one immediately following it (or the one immediately preceding it in the case of a correction). The ASP.NET Wizard control also supports nonlinear navigation, which means it allows you to decide to ignore a step based on the information the user supplies.

Figure 15-15 shows the resulting master page and a content page that uses the master page. To convert this example into something more practical, just replace the static text in the master page with the actual header, navigation controls, and footer you really want. All the child pages will acquire these features automatically. This is the first step for defining a practical structure for your entire website.

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Dim connectionString As String = "Data Source=localhost;Initial Catalog=Northwind;Integrated Security=SSPI" If integrated security isn t supported, the connection must indicate a valid user and password combination. For a newly installed SQL Server database, the sa (system administrator) account is usually present. Here s a connection string that uses this account: Dim connectionString As String = "Data Source=localhost;Initial Catalog=Northwind; user id=sa;password=opensesame" If you re using the OLE DB provider, your connection string will still be similar, with the addition of a provider setting that identifies the OLE DB driver. For example, you can use the following connection string to connect to an Oracle database through the MSDAORA OLE DB provider: Dim connectionString As String = "Data Source=localhost;Initial Catalog=Sales; " _ & "user id=sa;password=;Provider=MSDAORA" And here s an example that connects to an Access database file: Dim connectionString As String = "Provider=Microsoft.Jet.OLEDB.4.0; Data Source=C:\DataSources\Northwind.mdb"

The most important detail you need to know about the MultiView is that unlike the rich data controls (the GridView, FormsView, and so on), the MultiView is not a naming container This means that if you add a control named textBox1 to a view, you can t add another control named textBox1 to another view In fact, in terms of the page model, there s no real difference between controls you add to a view and controls in the rest of the page Either way, the controls you create will be accessible through member variables in your page class This means it s easy to configure a control in the second view when an event is raised by a control in the first view As a result, the pages you create using the MultiView tend to be heavier than normal pages.

One quirk that can catch unsuspecting developers is the way that master pages handle relative paths If all you re using is static text, this issue won t affect you However, if you ve added <img> tags or any other HTML tag that points to another resource, problems can occur The problem shows up if you place the master page in a different directory from the content page that uses it This is a recommended best practice for large websites In fact, Microsoft encourages you to use a dedicated folder for storing all your master pages However, if you re not suitably careful, this can cause problems when you use relative paths For example, imagine you put a master page in a subfolder named MasterPages and add the following <img> tag to the master page: <img src="bannerjpg" /> Assuming the file \MasterPages\bannerjpg exists, this appears to work fine.

If you re using a database other than SQL Server, you might need to consult the data provider documentation (or the .NET Framework class library reference) to determine the supported connection string values. For example, most databases support the Connect Timeout setting, which sets the number of seconds to wait for a connection before throwing an exception. (The SQL Server default is 15 seconds.)

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