单选题
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?（）
发布日期：2020-04-10
While ar.AsyncWaitHandle Is Nothing DoWork()End Whiledr = cmd.EndExecuteReader(ar)
While Not ar.IsCompleted DoWork()End Whiledr = cmd.EndExecuteReader(ar)
While T hread.CurrentThread.ThreadState = ThreadState.Running DoWork()End Whiledr = cmd.EndExecuteReader(ar)
While Not ar.AsyncWaitHandle.WaitOne() DoWork()End Whiledr = cmd.EndExecuteReader(ar)
题王网让考试变得更简单
扫码关注题王，更多免费功能准备上线！
此试题出现在
CMS专题
CMS专题
其他考试
I remember when I was a child, I was very（）with how many toys she had.
严格按照委托方指示，及时对外拨付资金或向受益人解付资金，及时处理（）等交易申请。
某公司正在进行组织架构的重组工作，其中设立审计委员会是一项重要的新工作。在选拔审计委员会成员时，公司拟定以下的候选人员，其中最有可能符合公司审计委员会委员任职资格的是（）。
女性，25岁，因风湿性心脏病行二尖瓣瓣膜置换术。术后服用华法林，在其健康教育中最重要的内容是（）
胸骨切迹平面相当于（）
空压机总是在空气压力低时能正常起动，但未到足够的高压值就停机。下述原因哪种最可能（）。
车站应建立票据、现金管理制度，制票和收款由一人负责。
工作压力超过1.6MPa的碳钢氧气管道，沿气流方向在阀门后必须装上一段长度不小于（）倍管径<且不小于1.5米>的铜管。
如何筛选事件，使时间窗口只显示需要观察的事件？
沉桩过程中发生下列哪些情况应暂停施工（）
暂无相关推荐~
You have an SQL query that takes one minute to execute. You use the following co...
You have an SQL query that takes one minute to execute. You use the following co...
You have an SQL query that takes one minute to execute. You use the following co...
You have an SQL query that takes one minute to execute. You use the following co...
SQL是Structured Query Language（）的缩写。
You received complaints about the degradation of SQL query performance. You iden...
When a valid SQL Query in a DB Read step returns 0 rows, which branch of the ste...
在设计阶段，如果在Query对象的SQL语句中设置了参数，则必须在Query的Params属性中为参数设置数据类型。
Evaluate the following query: SQL> SELECT TRUNC(ROUND(156.00,-1),-1)FROM DUAL...
Note the output of the following query； SQL> SELECT flashback_archieve_name...