请问我如何计算Vb中的年龄。 Visual Studio 15。 [英] Please How Do I Calculate For Age In Vb. Visual Studio 15.

问题描述

我正在尝试将dobtxbx文本框中的出生日期减去datetimepicker值，以便我在agetxbx文本框中获得年龄。

agetxbx.Text = Date.Now.Year - dobtxbx.text

解决方案

你不能从DateTime中减去一个字符串。

尝试：

  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（）

希望这会有所帮助。



更正代码以计算年数天数。

我建​​议阅读 Charles Book Zero，Charles Petzold [ ^ ]。它解释了为什么这不起作用，以及你需要做什么。它是.NET和C＃的一个很好的入门。

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

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

解决方案

You cannot subtract a string from a DateTime.
Try:

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.

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#.

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

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