单项选择题
You create a Web Form. The Web Form uses the FormView control to enable a user to edit a record in the database. When the user clicks the Update button on the FormView control, the application must validate that the user has entered data in all of the fields. You need to ensure that the Web Form does not update if the user has not entered data in all of the fields. Which code segment should you use? （）
A.protectedvoidFormView1_ItemUpdating（objectsender，FormViewUpdateEventArgse）{foreach（DictionaryEntryentryine.Keys）{if（entry.Value.ToString（）==System.String.Empty）{e.Cancel=true；return；}}}
B.protectedvoidFormView1_ItemUpdated（objectsender，FormViewUpdateEventArgse）{foreach（DictionaryEntryentryine.NewKeys）{if（entry.Value.Equals（“”））{e.KeepEditMode=true；return；}}}
C.protectedvoidFormView1_ItemUpdating（objectsender，FormViewUpdateEventArgse）{foreach（DictionaryEntryentryine.NewValues）{if（entry.Value.Equals（“”））{e.Cancel=true；return；}}}
D.protectedvoidFormView1_ItemUpdating（objectsender，FormViewUpdateEventArgse）{foreach（DictionaryEntryentryine.Keys）{if（entry.Value.ToString（）==System.String.Empty）{e.KeepInEditMode=true；return；}}}
相关考题
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单项选择题
You have an SQL query that takes one minute to execute. You use the following code segment to execute the SQL query asynchronously.IAsyncResult ar = cmd.BeginExecuteReader();You need to execute a method named Do Work() that takes one second to run while the SQL query is executing. DoWork() must run as many times as possible while the SQL query is executing. Which code segment should you use? （）
A.while（ar.AsyncWaitHandle==null）{DoWork（）；}dr=cmd.EndExecuteReader（ar）；
B.while（!ar.IsCompleted）{DoWork（）；}dr=cmd.EndExecuteReader（ar）；
C.while（Thread.CurrentThread.ThreadState==ThreadState.Running）{DoWork（）；}dr=cmd.EndExecuteReader（ar）；
D.while（!ar.AsyncWaitHandle.WaitOne（））{DoWork（）；}dr=cmd.EndExecuteReader（ar）； -
单项选择题
You create an application. The application processes hundreds of XML documents per minute. The XML documents are validated against inline schemas. You need to load XML documents from the file system and read them as quickly as possible. XML comments must be ignored while reading the XML documents.What should you do? （）
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? （）
A. Ensure that the source database is Microsoft SQL Server.
B. Ensure that the destination database is Microsoft SQL Server.
C. Ensure that the column names in the source table match the column names in the destination table.
D. Ensure that the bulk copy program (bcp) utility is installed on the destination server.
