You are creating a Windows Forms Application by using the .NET Framework 3.5.You plan to design a new control that will be used on multiple forms in the app.You need to ensure that the control meets the following requirement (1)It retrieves data from a MSSQL Server 2008 database instance. (2)It uses WPF classes to display data. (3)It uses user-customizable actions when the control is first painted on the form. What should you do?() Create a new custom class for the control that is derived from the Control class.。 Create a new custom class for the control that is derived from the UserControl class.。 Create a new custom class for the control that is derived from the ContentControl class.。 Create a new custom class for the control that is derived from the ContentPresenter class.。
产品保证所产生的价值属于产品价值范畴。
管理职能偏重于运筹,领导职能偏重于实践。
我们学习语言主要是学习它的()和()。
固相反应中,颗粒尺寸可改变反应()、()以及颗粒()。
为患者梳头时,遇头发打结不易梳理,可用何种溶液湿润后再梳理:()