Apress Introducing dot NET 4 0 with Visual Studio 2010_8

loại hình này của tính năng có thể rất hữu ích một cách nhanh chóng đặt lại với nhau các hình thức nhập dữ liệu đơn giản và các ứng dụng tạo mẫu. VS2010 có các chức năng mới để dễ dàng tạo ra các dữ liệu hình thức và tạo ra một số XAML đẹp, sạch sẽ.
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Apress Introducing dot NET 4 0 with Visual Studio 2010_8 CHAPTER 15 WPF 4.0 AND SILVERLIGHT 3.0 Figure 15-8. Improved error handling for user controls Static Resource and Designer Fix Previously, if a static resource was declared in app.xaml, y ou could not use it in the designer. In VS2010, you can. Drag-and-Drop Data Binding I’m not a big fan of drag-and-drop data binding and I think it’s fair to say that most programmers will rightly scorn such functionality. However, this type of feature can be very useful for quickly putting together simple data entry forms and prototyping applications. VS2010 includes new functionality to easily create data forms and creates some pretty clean XAML. It seems likely that Microsoft might have brought in this feature to encourage some winforms developers to move over. You will now learn about this feature by creating a simple master detail form. 1. Select Data Show Data Sources. 2. Click the Add New Data Source button on the Data Sources window, and the Choose a Data Source Type window will appear (see Figure 15-9).372 CHAPTER 15 WPF 4.0 AND SILVERLIGHT 3.0 Figure 15-9. Choose a Data Source Type dialog3. Select Database and then click Next. The Choose a Database Model screen will appear (see Figure 15-10). Figure 15-10. Choose a Database Model dialog4. Select Dataset (you could also use an entity data model for this feature) and then click Next. 373 CHAPTER 15 WPF 4.0 AND SILVERLIGHT 3.0 5. In the next screen, select the connection to the example database connection (or create it if you haven’t already) and then click Next. 6. A new screen (similar to Figure 15-11) will now appear, allowing you to select the objects you want to use. Figure 15-11. Choose your poison (sorry) database objects Select the Tables node to select all the tables and change the dataset name to Chapter15Dataset 7. before clicking F inish. 8. You now have the data source set up and if you look over to the Data Sources window (see Figure 15-12), you will see all the tables and their fields. Figure 15-12. Data Sources window after configuring the data source374 CHAPTER 15 WPF 4.0 AND SILVERLIGHT 3.0 You will now create a data grid to show all the films. You don’t want the field FilmID to appear, 9. so click the FilmID beneath the Film t able node. A drop-down menu will then appear, allowing you to select different types of UI to be generated for the field. In this case, you don’t want it to appear, so select None. 10. Now drag the Film t able node onto the designer surface to create a DataGrid of films (see Figure 15-13). If you run your project now, you will find a fully working DataGrid. However, you’re not done yet; VS2010 also supports the ability to easily create master detail forms.Figure 15-13. Data grid linked to Data source 11. You will now create a details panel to show more details of the film. Click FilmID (beneath the Film node) and change the type to Textbox. 12. Now click the Film node itself and on the drop-down menu change it to Details before dragging it to the right of the data grid (you might want to reposition the grid). 13. You also want to display all the film showings, so click the FilmShowing node and change the drop-down menu to List, and then drag it to the page beneath the grid. 14. Now press F5 to run your application and you will have a fully functional master details view similar to Figure 15-14. 375 CHAPTER 15 WPF 4.0 AND SILVERLIGHT 3.0 Figure 15-14. The final product of the drag-and-drop binding Improved XAML Intellisense XAML Intellisense has been tweaked. Now when you enter the curly bracket for a binding expression, Intellisense will add the other curly bracket for you and pop up a dialog with available options (see Figure 15-15). It seems a shame the team didn’t go further with this feature and show you different objects you could bind to. Figure 15-15. Improved XAML intellisense376 CHAPTER 15 WPF 4.0 AND SILVERLIGHT 3.0New ControlsWPF 4.0 now cont ...