单项选择题
A. Create an instance of the XmlReader class by using the XmlReader Create method with an instance of the XmlReaderSettings class.
B. Create an instance of the XmlReader class with an instance of the XmlTextReader class.
C. Create an instance of the XmlDocument class and specify a location for the application schema.
D. Create an instance of the XmlReader class with an instance of the XmlNodeReader class.
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? （）
单项选择题 You are creating a Web Form. The Web Form allows users to rename or delete products in a list. You create a DataTable named dtProducts that is bound to a GridView. DataTable has the following four rows. dtProducts. Rows[0]["ProductName"] = “Soap”;dtProducts. Rows[1][“ProductName”]= “Book”;dtProducts. Rows[2][“ProductName”]= “Computer”;dtProducts. Rows[3][“ProductName”]= “Spoon”;dtProducts. AcceptChanges(); The user utilizes a Web Form to delete the first product. You need to set the RowStateFilter property of the DataTables DefaultView so that only products that have not been deleted are shown. To which value should you set the DataTabless DefaultView.RowStateFilter? （）
单项选择题 You are creating a DataTable. You use the following code segment to create the DataTable. (Line numbers are included for reference only.) 01 DataTable dt = new DataTable(“Products”); 02 dt.Columns.Add(new DataColumn(“Price”, typeof(decimal))); 03 dt.Columns.Add(new DataColumn(“Quantity”, typeof(Int32))); 04 DataColumn dc = new DataColumn(“Total”, typeof(decimal)); 05 dt.Columns.Add(dc); You need to ensure that the Total column is set to the value of the Price column multiplied by the Quantity column when new rows are added or changed. What should you do? （）