单项选择题
A. Validate the name field in the CellValidating event. Set e.Cancel = true if the name field is
B. Validate the name field in the CellErrorTextChanged event. Get e.RowIndex if the name field ..
C. Validate the name field in the CellEnter event. Set the focus on the name field if the name ...
D. Validate the name field in the CancelRowEdit event. Set the focus on the name field if the name ...
单项选择题 The UI is not being updated when the Data property is set. You need to ensure that the DisplayData class correctly updates the UI when the Data .. What should you do ?（）
单项选择题 You are developing a Windows Presentation Foundation (WPF) application that displays opportunities from List<T.. class named Lead. The Lead class contains the properties Title and Revenue. You add a DataGrid control named dgQualifiedLeads to the MainWindow.xaml file. You set the ItemsSource property to Leads as follows. You need to ensure that CollectionViewSource is used to filter the list to display only Lead objects with revenue ... What should you do ?（）
单项选择题 You are developing WPF application for managing student information... btnSort and a DataGrid control named dgStudents on the design surface of the MainWindow.xaml properties : FirstName and LastName. You create the following code segment in the constructor of... The DataGrid control displays the list of students unsorted. You need to ensure that the list of students is sorted by last name. Which code segment should you add to the click event handler of the Button control？（）