将一年添加到dateTimePicker [英] Add a year to a dateTimePicker

问题描述

我有三个字段，即txtTerm，dtCommencementDate和dtDateOfExpiry。现在，dtCommencementDate和dtDateOfExpiry是DateTimePickers。我希望用户输入例如99，然后应将其添加到纪念日以确定到期日期。下面是代码，但是DateTimePicker的dtDateofExpiry没有添加。请帮忙。

  Dim  intTerm 正如 整数 = Val（ Me  .txtTerm.Text）
  Dim  dtComm 作为 日期 = 我 .dtCommencementDate.Text 
  Dim  dtExp  As   Date  = DateAdd（DateInterval.Year，intTerm，dtComm）
  Me  .dtDateOfExpiry.Text = dtExp 
 

解决方案

您没有显示您使用的 DateTimePicker ，但是它很可能具有 System.DateTime 类型的值，因此您可以使用 System.DateTime.AddYears ：

https://msdn.microsoft.com/en-us/library/system.datetime.addyears（V = vs.110）的.aspx [ ^ 。

-SA

你应该设置值 [ ^ ]而不是文字属性！

<前lang =vb> 我 .dtDateOfExpiry.Value = DateTime.Now.AddYears（ 1 ）

非常感谢，但在调试过程中，我可以看到年份被添加到到期日，但在表格上没有变化。而不是将年份添加到它，而是减少它。当我将99年添加到今天的日期时，它减少了一年，即10月27日至10月14日。我只是不知道为什么我已经尝试了所有代码。

Please I have three fields, namely txtTerm, dtCommencementDate and dtDateOfExpiry. Now, dtCommencementDate and dtDateOfExpiry are DateTimePickers. I want if the user enters the term e.g. 99, then it should be added to the date of commecmcement to determine the date of expiry. Below is the code, but the dtDateofExpiry which is the DateTimePicker is not adding. Please help.

Dim intTerm As Integer = Val(Me.txtTerm.Text)
           Dim dtComm As Date = Me.dtCommencementDate.Text
           Dim dtExp As Date = DateAdd(DateInterval.Year, intTerm, dtComm)
           Me.dtDateOfExpiry.Text = dtExp

解决方案

You did not show which DateTimePicker you use, but most likely it has the value of the type System.DateTime, so you can use System.DateTime.AddYears:
https://msdn.microsoft.com/en-us/library/system.datetime.addyears(v=vs.110).aspx[^].

—SA

You should set Value[^] instead of Text property!

Me.dtDateOfExpiry.Value = DateTime.Now.AddYears(1)

Many thanks but during debugging, I can see the year is being added to the expiry date but does not change on the form. Instead of adding the year to it, it rather decreases it. when I add 99 years to today's date, it decreases by one year, thus 27-Oct-14. I just don't know why though I have tried all your codes.

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