You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. You add a custom command as a resource. The key of the command is saveCommand. You write the following code fragment. (Line numbers are included for reference only.) You need to ensure that saveCommand is executed when the user clicks the Button control. What should you do? （）
1、You use Microsoft .NET Framework 4 to
You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application.The application displays a list of books.You wri...
2、You use Microsoft .NET Framework 4 to
You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application.You add a property named ServiceContext to a co...
3、You use Microsoft .NET Framework 4 to
You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application.The application has multiple data entry windows....
4、You use Microsoft .NET Framework 4 to
You use Microsoft .NET Framework 4 to create a Windows Forms application.You plan to use a Windows Presentation Foundation (WPF) control of the...
5、You use Microsoft .NET Framework 4 to
You use Microsoft .NET Framework 4 to create a custom Windows Presentation Foundation (WPF) application.Your environment includes several WPF appl...
6、You use Microsoft .NET Framework 4 to
You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application.You write the following code fragment. (Line num...