Please How Do I Calculate For Age In Vb. Visual Studio 15.

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i am trying to subtract the date of birth which is is in the dobtxbx textbox as datetimepicker value so that i get the age in the agetxbx textbox.
agetxbx.Text = Date.Now.Year - dobtxbx.text

Posted 9-Dec-15 3:28am

Masta Pee

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phil.o · Accepted Answer · 2015-12-09T03:39:00

Solution 1

You cannot subtract a string from a DateTime.
Try:

VB

Dim dob As Datetime = DateTime.Parse(dobtxbx.Text)
Dim delta As TimeSpan = DateTime.Today - dob
Dim age As Double = Math.Floor(delta.TotalDays / 365.25)
agetxbx.Text = age.ToString()

Hope this helps.

[Edit] Corrected the code to compute the number of years from the number of days.

Posted 9-Dec-15 3:39am

phil.o

Updated 9-Dec-15 4:43am

v4

Comments

Sergey Alexandrovich Kryukov 9-Dec-15 10:27am

Sure, a 5.
—SA

Masta Pee 9-Dec-15 10:28am

when i try it, there is an error that say years is not a member of timespan.. options given are days and hours

phil.o 9-Dec-15 10:41am

You're right; please see my updated answer

Masta Pee 10-Dec-15 4:15am

it worked perfectly.. i also editted it to do other great stuffs... thank you once again

phil.o 10-Dec-15 4:25am

You're very welcome :)

Richard MacCutchan · Accepted Answer · 2015-12-09T03:57:00

Solution 2

I would suggest reading .NET Book Zero, by Charles Petzold[^]. It explains why this will not work, and what you need to do. It is a great primer for .NET and C#.

Posted 9-Dec-15 3:57am

Richard MacCutchan

Comments

Masta Pee 9-Dec-15 10:29am

thank you but can you please give me a fair sample of how it should look like

Richard MacCutchan 9-Dec-15 12:12pm

If you read that book you will find one, and many other useful samples also.

Masta Pee 10-Dec-15 4:14am

thank you

Michael_Davies · Accepted Answer · 2015-12-09T03:59:00

Solution 3

See MSDN: https://msdn.microsoft.com/en-us/library/b5xbyt6f(v=vs.90).aspx[^]

Posted 9-Dec-15 3:59am

Michael_Davies

Comments

Masta Pee 9-Dec-15 10:29am

thank you but any example please

Michael_Davies 9-Dec-15 11:03am

Yes there are on the link...

Masta Pee 10-Dec-15 4:14am

thsnk you