单项选择题
A. Load the XML data by using an instance of the XmlDocument class and specify a location for the application schema.
B. Configure the ValidationEventHandler in the XmlReaderSettings of the XmlReader object.
C. Read the XML file into a DataSet object and set the EnforceConstraints property to True.
D. Read the XML file into a DataSet object. Handle the DataSet.MergeFailed event to parse the data that does not conform to the XML schema.
多项选择题 Your Web site processes book orders. One of the application methods contains the following code segment.Dim doc As New XmlDocument()doc.LoadXml("10" &_"Dictionary")You need to remove the discount element from XmlDocument. Which two code segments can you use to achieve this goal? （）
多项选择题 You load an XmlDocument named doc with the following XML. Dictionary World Atlas You need to change the value for the genre attribute to NA for all book attributes. First, you add the following code segment to your class.Dim root As XmlElement = doc.DocumentElementDim nodes As XmlNodeList = root.SelectNodes("books/book")Which additional two code segments can you use to achieve this goal?（）
多项选择题 You are creating a Web Form. You write the following code segment to create a SqlCommand object.Dim conn As SqlConnection = New SqlConnection(connString)conn.Open()Dim cmd As SqlCommand = conn.CreateCommand()cmd.CommandText = "select count(*) from Customers"You need to display the number of customers in the Customers table. Which two code segments can you use to achieve this goal?（）