如何调用protected mathod。 [英] how to call protected mathod.

问题描述

先生，我有一个类似的预测方法： -

sir, i have a projected mathod like:-

Protected Sub ValidateDate(ByVal sender As Object, ByVal e As ServerValidateEventArgs)
      If Regex.IsMatch(txtdated.Text, "(((0|1)[1-9]|2[1-9]|3[0-1])\/(0[1-9]|1[1-2])\/((19|20)\d\d))$") Then
          Dim dt As DateTime
          e.IsValid = DateTime.TryParseExact(e.Value, "dd/MM/yyyy", New CultureInfo("en-GB"), DateTimeStyles.None, dt)
          If e.IsValid Then
              ClientScript.RegisterStartupScript(Me.GetType(), "alert", "alert('Valid Date.');", True)
          End If
      Else
          e.IsValid = False
      End If
  End Sub

i想在button.click方法之间调用这个方法。喜欢： -

i want to call this mothod between the button.click method. like:-

Protected Sub btnstudent_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnstudent.Click

ValidateDate()

End Sub

我该怎么办..

how can i do it..

推荐答案

）然后
Dim dt As DateTime
e.IsValid = DateTime.TryParseExact（e.Value， dd / MM / yyyy，新 CultureInfo（ en-GB），DateTimeStyles.None，dt）
If e.IsValid 然后
ClientScript.RegisterStartupScript（ Me 。 GetType （）， alert， alert（'Valid Date。'）;， True ）
结束 如果
Else
e.IsValid = False
结束 如果
结束 Sub

") Then Dim dt As DateTime e.IsValid = DateTime.TryParseExact(e.Value, "dd/MM/yyyy", New CultureInfo("en-GB"), DateTimeStyles.None, dt) If e.IsValid Then ClientScript.RegisterStartupScript(Me.GetType(), "alert", "alert('Valid Date.');", True) End If Else e.IsValid = False End If End Sub

i想在button.click方法之间调用这个方法。喜欢： -

i want to call this mothod between the button.click method. like:-

Protected Sub btnstudent_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnstudent.Click

ValidateDate()

End Sub

我该怎么做..

how can i do it..

By定义，你只能从声明类或任何派生类调用受保护的方法。

严格来说，还有另一种方法，反射，但是：1）这是一个恶作剧; 2）在你对基础知识充满信心之前，你不应该达到这样的高级主题，你还不知道。



请阅读：http://msdn.microsoft.com/en-us/library/76453kax.aspx [ ^ ]。



如果您不能使用这样的派生类或声明类，请不要问该怎么办。答案是：决定取决于你。您可能不应该使用受保护的方法，甚至需要从根本上修复您的代码设计。无论如何，欢迎您提出相关的后续问题。

-SA

By definition, you can only call a protected method from the declaring class or any of derived classes.
Strictly speaking, there is another way, reflection, but: 1) this is a trick; 2) you should not get to such advanced topics before you make yourself confident with the fundamentals, which you don't know yet.

Please read: http://msdn.microsoft.com/en-us/library/76453kax.aspx[^].

Please, don't ask what to do if you cannot use such a derived class or the declaring class. The answer would be: the decision is up to you. It's possible that you should not use the protected method, or even need to radically fix your code design. Anyway, your related follow-up questions will be welcome.

—SA

使用此

use this

Protected Sub btnstudent_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnstudent.Click

ValidateDate(send,e)

End Sub

这篇关于如何调用protected mathod。的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！