如何在Vb.net中区分两个DropdownList值 [英] How to differenciate of Two DropdownList values in Vb.net

问题描述

大家好，我遇到了两个DropDownList值不同的问题.我是手动输入两个DropDownList的值.
值是时间，如
01:00
01:30
02:00
-----
-----
23:59
并且与第二个DropdownList相同.


我想两者都不同.我将在差异的texbox中显示.

例如:我需要的是dropdown2-dropdown1 = 02:00-01:00 = 00:30.
怎么做.

请任何人帮帮我.

Hi Guys , I have facing the problem of differenciate of two DropDownList values. I was enter the values manually of both DropDownList.
The values are Time like
01:00
01:30
02:00
-----
-----
23:59
and also same as second DropdownList.


I want to difference of both. I will display in texbox of difference.

For example : differenciate from dropdown2 - dropdown1= 02:00 - 01:00 = 00:30 that is i want.
How to do this.

Please any one help me.

推荐答案

这是一个示例，

here is an example,

   Dim t1 As TimeSpan
   Dim dt2 As DateTime = Convert.ToDateTime("01/01/2001 02:00")
   Dim dt1 As DateTime = Convert.ToDateTime("01/01/2001 01:30")
   t1 = dt2.Subtract(dt1)
   Dim duration = t1.Hours.ToString("00") & ":" & t1.Minutes.ToString("00")
'02:00 - 01:30 = 00:30
'replace underline time value with dropdownlist.text
'eg. Convert.ToDateTime("01/01/2001 " & dropdown2.text)

祝您编码愉快！
:)

Happy Coding!
:)

首先获取下拉列表的值.现在它们是字符串格式，因此转换为DateTime然后减去.

First get the value of dropdownlists. Now those are in string format, so convert into DateTime then subtract.

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