设置openfiledialog1引用一个openfiledialog 对象.则打开该对话框的正确代码是（)A. openfile

设置openfiledialog1引用一个openfiledialog 对象.则打开该对话框的正确代码是()

A. openfiledialog1.show();

B. openfiledialog1.showdialog();

C. openfiledialog1.open();

D. openfiledialog1.openandshow();