检测数组成员visual basic [英] Detect array members visual basic

问题描述

我正在尝试在VB中创建一个按钮数组。一切都很顺利，直到我想从该阵列中的每个按钮做出不同的动作，例如当在数组btns（）中我点击btns（0）我希望它删除数组btnz（）中的btnz（0）。当有更多btns时出现问题，假设有3个按钮，但它们都被分配给同一个处理程序，所以我首先必须检测btns（）中的哪个按钮被点击。来自btns（）和btnz（）的顺便按钮是通过点击Button1创建的，这就是为什么我必须为它们分配相同的处理程序。



任何人都有一个解决方案如何检测点击了哪个按钮，或其他一些想法？



我尝试过：



我想我应该把它放在for循环中，但不知道如何完成它。



Private Sub Clicked_On_btns（ByVal sender As Object ，ByVal e As System.EventArgs）

For i = 0 to num'num是迄今为止创建的btns数量

'这里是我被困的地方

下一页

结束Sub

解决方案

As PhantomUpvoter [ ^ ]，您可以使用 sender 用于检测已点击的按钮的对象。

 私有  Sub  Button1_Click（ ByVal  sender  As  System。 Object ， ByVal  e  As  System.EventArgs）句柄 Button1.Click 
  Dim  b  As  Button =  CType （发件人，按钮）
 Label1.Text = b.ID 
 结束  Sub  

另一种方法是创建列表（按钮）并使用 AddHandler语句 [ ^ ]添加点击事件以动态创建按钮。





1.添加方法，用于处理点击事件。

 私有  Sub  Button_Click（ ByVal  sender < span class =code-keyword>作为 对象， ByVal  e  As  EventArgs）
 ' 多个按钮的常用方法 
 结束  Sub  

2.创建按钮

  Dim  btns  As 列表（ 按钮）= 新列表（  Bu tton）
 对于 i 作为 整数 =  0     9  
  Dim  btn 作为按钮= 新按钮
 使用 btn 
 ' 设置，高度，位置，文本等 
 .Parent = 我 
 结束 使用 
 ' 将按钮添加到按钮列表 
 btns.Add（btn）
 AddHandeler btn.Click AdressOf Button_Click 
  Next  

欲了解更多详情，请参阅：

在Windows窗体中创建事件处理程序 [ ^ ]

如何：使用Designer创建事件处理程序 [ ^ ] 如何：在运行时为Windows窗体创建事件处理程序 [ ^ ]

I am trying to make a button array in VB. Everything was going fine until I wanted from every single button in that array to do different action, e.g. when in array btns() I click on btns(0) I want it to delete btnz(0) in array btnz(). Problem occurs when there are more btns, let's say there are 3 buttons, but they are all assigned to same handler so I first have to detect which button from btns() is clicked. Btw buttons from btns() and btnz() are created by clicking on Button1, that's why I had to assign them the same handler.

Anyone got a solution for how to detect which button was clicked, or some other idea?

What I have tried:

I figured I should put it in for loop, but don't know how to finish it.

Private Sub Clicked_On_btns(ByVal sender As Object, ByVal e As System.EventArgs)
For i = 0 To num ' num is number of btns created so far
' here's where I got stuck
Next
End Sub

解决方案

As PhantomUpvoter[^] mentioned in the comment to the question, you can use sender object to detect what button have been clicked.

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim b As Button = CType(sender, Button)
        Label1.Text = b.ID
End Sub

Another way is to create List(of Button) and using AddHandler statement[^] add a Click event to dynamically created buttons.


1. Add method which will be used to handle click event.

Private Sub Button_Click(ByVal sender As Object, ByVal e As EventArgs)
   ' common method for multiple buttons
End Sub

2. Create buttons

Dim btns As List(Of Button) = New List(Of Button)
For i As Integer = 0 to 9
    Dim btn As Button = New Button
    With btn
        'set with, height, location, text, etc.
        .Parent = Me
    End With
    'add button to the list of button
    btns.Add(btn)
    AddHandeler btn.Click AdressOf Button_Click
Next

For further details, please see:
Creating Event Handlers in Windows Forms[^]
How to: Create Event Handlers Using the Designer[^]How to: Create Event Handlers at Run Time for Windows Forms[^]

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