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Xiaobian to share with you how to use VB. NET control array, I believe most people still do not know how, so share this article for everyone's reference, I hope you have a lot of harvest after reading this article, let's go to understand it together!

VB. NET is very powerful, can achieve code management, and strengthen the code architecture, for programmers to bring a strong security development environment. Here we first create a Button type VB. NET control array, to explain the relevant knowledge points.

1. Create a project of type "Windows Application", add a class named ButtonArray, and make this class inherit the System.Collection. Base class. System.Collections.CollectionBase class is a base class that provides abstraction for collection operations in the. NET Framework class library. By inheriting it, we can add, delete, and index collections for our ButtonArray class.

2. Add ParentForm attribute to ButtonArray class, that is, the form where the control group is located, and create initialization function (constructor);

3. Add AddItem method for control array class, which adds members to control array class;

Add a RemoveItem method to the control array class, which removes a member from the control array.

Example code for VB. NET control array creation:

Public Class ButtonArray

Inherits System.Collections.

CollectionBase

Private ReadOnly ParentForm

As System.Windows.Forms.Form

Public Sub New(ByVal pForm

As System.Windows.Forms.Form)

ParentForm = pForm

End Sub

Default Public ReadOnly Property Item

(ByVal index As Integer) As System.

Windows.Forms.Button

Get

Return Me.List.Item(index)

' ButtonArray's List property is derived from

CollectionBase inheritance

End Get

End Property

Public Sub AddItem()

Dim btnItem As New System.

Windows.Forms.Button

Me.List.Add(btnItem)

ParentForm.Controls.Add

(btnItem) 'Add a control to a form

btnItem.Tag = Me.Count

'Count property inherited from CollectionBase

btnItem.Top = Me.Count * 30

btnItem.Left = 200

btnItem.Text = "Button"

& Me.Count.ToString

AddHandler btnItem.Click,

AddressOf btnItem_Click

'Binding event handlers

End Sub

Public Sub AddItem(ByVal btnItem

As System.Windows.Forms.Button)

Me.List.Add(btnItem)

AddHandler btnItem.Click,

AddressOf btnItem_Click

'Binding event handlers

End Sub

Public Sub RemoveItem()

If Me.Count > 0 Then

ParentForm.Controls.Remove

(Me(Me.Count - 1))

Me.List.RemoveAt(Me.Count - 1)

End If

End Sub

Public Sub btnItem_Click

(ByVal sender As Object,

ByVal e As System.EventArgs)

'Write control array response to click event here

'For example:

MsgBox("Click: " & sender.GetType().

ToString & CType(CType(sender,

Button).Tag, String))

End Sub

End Class

The above is "VB. NET control array how to use" all the contents of this article, thank you for reading! I believe that everyone has a certain understanding, hope to share the content to help everyone, if you still want to learn more knowledge, welcome to pay attention to the industry information channel!

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