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Figure 1610: Notification for managed code errors, which makes debugging easier
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The Show a notification for managed code errors checkbox does not affect forms running under Forms Services
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When the Show a noti cation for managed code errors option is enabled or you re previewing the form, you may see two subsequent dialogs when an error occurs The rst dialog will be similar to that shown in Figure 1610, while the second is what the user will see regardless of the Show a noti cation setting
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Now that you re familiar with inserting controls and getting accustomed to the menu items that InfoPath adds to Visual Studio, let s see how to work with controls in the view One of the biggest differences when designing a form template in VSTO lies in how a control responds when double-clicked As we know, InfoPath shows the control s properties dialog VSTO, on the other hand, jumps into the form code and creates a Changed event handler for the node bound to that control This may feel a little odd (and sometimes annoying) at rst But in the grand scheme of using the Visual Studio Designer, that s what all controls do! Whether you re creating an HTML page, an ASPNET Web site, or a Windows application in Visual Studio,
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Table 162: InfoPath Controls Behaviors on Double-Click Control Double-Click Behavior
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Text Box, Rich Text Box, Date Picker, Option Button, (Optional/Repeating/ Recursive) Section, (Repeating) Choice (Section/Group), File Attachment, Bulleted/Numbered/Plain List, Picture, Ink Picture, Drop-Down List Box, Combo Box, and (Horizontally) Repeating Table All unbound controls (Button, Expression Box, Scrolling/Horizontal Region, etc)
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Create, if necessary, and jump to the Changed event in form code
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Open the properties dialog for the control
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double-clicking on a control in the Visual Studio Designer creates and jumps into the OnClick or OnChange handler for that control InfoPath now conforms to the Visual Studio standard! This is a giant departure from the InfoPath design mode But not all of the InfoPath controls jump into code Table 162 documents the behaviors you can expect when double-clicking on an InfoPath control in VSTO
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The Changed event was chosen as the default event over the Changing and Validating events because of its ubiquity in InfoPath forms It is also the most exible XML event because the main data source is not read-only See 15 for details regarding XML events
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Since a double-click sends you into code, you need a quick way to get to a control s properties There are a couple of ways to do so One option is to use the Alt+Enter key shortcut carried over from InfoPath An alternative is to use the shortcut key from the school of Visual Studio: F4 As always, you can still right-click on a control and get the menu, which is similar to that shown in InfoPath The last item in the right-click menu is yet another entry point for the properties dialog The resulting properties dialog mimics the same UI you see in InfoPath
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Did you double-click and jump into code, but you meant to go to the control s properties dialog instead Immediately after double-clicking and while still in the form code, perform four undo operations (Undo the event handler formatting, remove the event handler, undo the EventManager hookup formatting, and nally remove the Event Manager hookup)
If you re versed in working with controls in the Visual Studio Designer, you might know there s a Properties Window menu item (accessible via the View menu) The Properties Window dialog is a modeless and dockable window that exposes quick access to read and change properties for a selected control You can witness the Properties Window dialog behavior with any ASPNET or Windows Forms controls, for example, by simply selecting the control in the Visual Studio Designer Unfortunately, InfoPath s VSTO support does not include integrating with this dialog As a result, it will always be empty when you select an InfoPath control The workaround is to use the conventional InfoPath properties dialog as described earlier