70-316 Developing and Implementing Windows-based Applications with Microsoft Visual C# .NET Certification Exam

Demo Question 11.

You use Visual Studio .NET to develop a Microsoft Windows-based application. Your application contains a form named CustomerForm to enter time sheet entries for a law firm. At design time you set the DataBindings properties of each TextBox control to the appropriate column in the DataTable object of CustomerDataSet. When the application runs, users must be able to edit the information displayed in the text boxes. All user changes must be saved to the appropriate database when saveButton is executed. The event handler for btnSave includes the following code segment: DataAdapter.Update(CustomerDataSet) You application fails to work correctly. BtnSave fails to save any values edited in the text boxes. You need to correct this problem. What should your application do?

A. Call the InsertCommand method of the DataAdapter.
B. Before calling the Update method, ensure that a row position change occurs in CustomerDataSet.
C. Reestablish the database connection by calling the Open method of the Connection.
D. CALL THE Update method of the DataAdapter and pass in the Connection.


Display Answer

Answer: D We must specify the Data Source as well. The Data Source is specified with the SQLConnection object. We should issue the following command:

Explanation: