Vb.net时差2按钮 [英] Vb.net time difference 2 button

问题描述

我有2个按钮可以获得我的系统时间。

 DateTime.Now.ToString 

所以问题是如何才能获得两个时间的差异由2个按钮显示到2个文本框



我需要这个差异是可变的因为生病保存到我的数据库中



我尝试了什么：

 '  button1  
 
 Timer2.Start（）
 TextBox1.Text = DateTime.Now。 ToString（  hh：mm：ss tt）
 
 
 '  button2  
 
 Timer2.Start（）
 TextBox2。 Text = DateTime.Now.ToString（  hh：mm：ss tt）

i试图把它作为button2

 label1.Text = DateDiff（   n，DateTime.Parse（TextBox2.Text），DateTime.Parse（TextBox1.Text）） .ToString 

但它给出负数 ex：-2（分钟）

所以请帮我提高代码

解决方案

例如：

  Dim  startTime < span class =code-keyword> As  DateTime 
  Dim  endTime  As  DateTime 
  Dim  duration  As  TimeSpan 
 
 
 < span class =code-comment>'  button1  
 starttime = DateTime.Now 
 
   button2  
 endtime = DateTime.Now 
 
 ' 计算时差 
持续时间= endTime  -  startTime 

欲了解更多详情，请参阅：

TimeSpan Structure（System） [ ^ ]

你的DateDiff参数轮回错误，参见 DateDiff函数（Visual Basic） [ ^ ]。



但是，Maciej提供了上述最佳解决方案。

i have 2 button that get my system time.

DateTime.Now.ToString

so the problem is how can i get the difference of two time by 2 button and displayed to 2 textbox

and i need that difference to be variable because ill save it into my database

What I have tried:

'button1

        Timer2.Start()
        TextBox1.Text = DateTime.Now.ToString("hh:mm:ss tt")


'button2

        Timer2.Start()
        TextBox2.Text = DateTime.Now.ToString("hh:mm:ss tt")

i tried to put this is button2

label1.Text = DateDiff("n", DateTime.Parse(TextBox2.Text), DateTime.Parse(TextBox1.Text)).ToString

but it gives the negative number ex: -2 (minutes)
so please help me to enchance the code

解决方案

For example:

Dim startTime As DateTime
Dim endTime As DateTime
Dim duration As TimeSpan


'button1
starttime = DateTime.Now

'button2
endtime = DateTime.Now

'calculate time difference
duration = endTime - startTime

For further details, please see:
TimeSpan Structure (System)[^]

Your DateDiff parameters are the wrong way round, see DateDiff Function (Visual Basic)[^].

However, Maciej has provided the best solution above.

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