How to differenciate of Two DropdownList values in Vb.net

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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.

Posted 21-Aug-12 0:40am

CH Guravaiah

Updated 21-Aug-12 19:42pm

v6

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Aarti Meswania · Answer 1 · 2012-08-21T01:41:00

here is an example,

VB

   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)

Happy Coding!
:)

Sunil Kumar Pandab · Answer 2 · 2012-08-21T01:22:00

Solution 1

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

Posted 21-Aug-12 1:22am

Sunil Kumar Pandab