單項(xiàng)選擇題

You are creating a Windows Forms application by using the .NET Framework 3.5.You plan to develop a custom control for the application. The control will be a composite control.Your need to derive from the class that will create the control by using the minimum amount of development effort.What should you do？（）

A.Derive from the Control class.
B.Derive from the UserControl class.
C.Derive from the FrameworkElement class.
D.Derive from the ContainerControl class.

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單項(xiàng)選擇題

You are creating a Windows Forms application by using the .NET Framework 3.5.You plan to develop a new control for the application.You need to ensure that the control extends the DataGridView control by allowing the cells to contain multicolored text.What should you do？（）

A.Override the OnPaint method.
B.Write a code segment to handle the CellPainting event.
C.Write a code segment to handle the CellParsing event.
D.Write a code segment to handle the RowPostPaint event.

單項(xiàng)選擇題

You are creating a Windows Forms application by using the .NET Framework 3.5. You plan to develop a new control for the application.The control will have the same properties as a TextBox control.You need to ensure that the control has a transparent background when it is painted on form.You want to achieve this goal by using the minimum amount of development effort.What should you do？（）

A.Create a new class that is derived from the Control class.Call the SetStyle method in the constructor.
B.Create a new class that is derived from theTextBox control class.Override the OnPaint method in the constructor.
C.Create a new class that is derived from the Control class.Set the BackColor property of the control to Transparent.Call the SetStyle method in the constructor.
D.Create a new class that is derived from theTextBox control class.Set the BackColor property of the control to Transparent in the constructor.Call the SetStyle method in the constructor.

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你可能感興趣的試題

You are creating a Windows Forms application by using the .NET Framework 3.5.You plan to develop a new control for the application.You need to ensure that the control extends the DataGridView control by allowing the cells to contain multicolored text.What should you do？（）

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