计算完成一项任务花费的时间 [英] Calculate how much time taken to complete a task

问题描述

嗨
我将通过询问几个问题来评估学生.单击开始"按钮后，我想计算出学生回答这些问题所花费的时间.

开始评估时应该分配固定的时间，并且花在回答问题上的时间应减少(减少)

我要显示的是:-
-单击开始"按钮后要花费多少时间
-剩余时间超出固定时间

Hi
I am going to evaluate a student by asking few questions.After clicks Start button I want to calculate how much time taken to answer these questions by the student.

there should be a fixed time allocated when starting the evaluation and it should be reduced(decrease)when time spending to answer the questions

what i want to display is :-
- how much time consume after clicking the start button
- Remaining time out of fixed time

推荐答案

使用DateTime.现在知道它们开始的时间.然后，您可以定期触发一个计时器，并从DateTime中减去您的存储值.现在，找出经过了几秒钟.

Use DateTime.Now to know the time they started. Then you can fire a timer regularly and subtract your stored value from DateTime.Now to find out how many seconds have passed.

要计算还是要测量?我认为-要衡量.

比System.DateTime更准确的是类System.Diagnostics.Stopwatch:
http://msdn.microsoft.com/en-us/library/system.diagnostics. stopwatch.aspx [ ^ ].

这是衡量性能和相关时间间隔值的最佳方法.类文档充分描述了用法和功能.

—SA

To calculate or just to measure? I think — to measure.

More accurate than System.DateTime is the class System.Diagnostics.Stopwatch:
http://msdn.microsoft.com/en-us/library/system.diagnostics.stopwatch.aspx[^].

This is the best way to measure performance and related time interval values. The class documentation fully describes the use and the features.

—SA

基本上，您只需要存储几条信息

• 此人开始回答问题的时间
• 给出回答问题的固定时间

Well basically you need to store just few pieces of information

• The time the person started to answer questions
• The fixed amount of time that''s given to answer the question

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