试题详情
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. Dim ar As IAsyncResult = cmd.BeginExecuteReader（　） You need to execute a method named DoWork（　） 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、

B、

C、

D、

  • B

  • 关注下方微信公众号，在线模考后查看

热门试题