多项选择题
A. Dim customerCount As Object = cmd.ExecuteScalar()lblCompanyName.Text = customerCount.ToString()
B. Dim customerCount As Integer = cmd.ExecuteNonQuery()lblCompanyName.Text = customerCount.ToString()
C. Dim dr As SqlDataReader = cmd.ExecuteReader()dr.Read()lblCompanyName.Text = dr(0).ToString()
D. Dim dr As SqlDataReader = cmd.ExecuteReader()dr.Read()lblCompanyName.Text = dr.ToString()
多项选择题 You create a Web Form that contains a TreeView control. The TreeView control allows users to navigate within the Marketing section of your Web site. The following XML defines the site map for your site. You need to bind the TreeView control to the site map data so that users can navigate only within the Marketing section. Which three actions should you perform?（）
单项选择题 You are transferring records from one database to another. You need to decide whether you can use the SqlBulkCopy class to transfer the records. What should you do? （）
多项选择题 You create a server control that inherits from WebControl. You need to enable the server control to emit markup for a new kind of mobile device. You must not alter the code in the server controls. Which two actions should you perform?（）