VB.NET Programically added new form with button - Click even't doesn't see textbox?

Here is some example code that demonstrtes how to dynamically create buttons and assigne event handlers. In addition the created buttons are also copied into an array which gives you an alternate means of access a dynamically created button. Thie code uses the array to rename all the buttons if the form is clicked instead of a button. Clicking a button will change the button color to red or green.

Public Class Form1

Private m_btnArray(4, 4) As Button

Private Sub Form1_Load(ByVal sender As System.Object, _

ByVal e As System.EventArgs) _

Handles MyBase.Load

Me.Width = 65 * 7 '(width of 5 buttons + margins)

Me.Height = (35 * 7) + 35

createArray() 'add 5x5 array of buttons

End Sub

Private Sub createArray()

Dim newbtn As Button

Dim x, y, cnt, btnTop, btnLeft As Integer

btnTop = 0 'initalize

For y = 0 To 4

btnTop += 35

btnLeft = 0 'initalize

For x = 0 To 4

btnLeft += 65

newbtn = New Button

Me.Controls.Add(newbtn) 'add new button to form

AddHandler newbtn.Click, AddressOf multiButton_Click

With newbtn

.Name = "myBTN_" & cnt

.Width = 60

.Height = 30

.Text = "Btn_" & cnt

.Top = btnTop

.Left = btnLeft

.Visible = True

.Enabled = True

End With

m_btnArray(x, y) = newbtn

cnt += 1

Next

Next

End Sub

Private Sub multiButton_Click(ByVal sender As System.Object, _

ByVal e As System.EventArgs) _

Handles MyBase.Click

Dim btn As New Button

Dim x, y, cnt As Integer

Dim txt As String

Static Dim nameCnt As Integer

If btn.GetType Is sender.GetType Then

'sender is a button

btn = sender

If btn.BackColor = Color.Red Then

btn.BackColor = Color.LightGreen

Else

btn.BackColor = Color.Red

End If

Else

'assume the form has been clicked, change text of all buttons

For y = 0 To 4

For x = 0 To 4

txt = nameCnt & "Btn_" & cnt

m_btnArray(x, y).Text = txt

cnt += 1

Next

Next

nameCnt += 1

End If

End Sub

End Class

Build the window using the VB.NET form designer. Include everything in it that you need. Then the click event on your other form can simply create a new instance of that form and display it.

including buttons & text fabric container controls on the fly isn't any huge deal. The trick is, how are you going to make the button do some thing as quickly because it somewhat is further. you will might desire to build an unquestionably code generator for that. Is it workable? particular. Is it basic? So so. you will possibly might desire to comprise the C# compiler on your distribution so as that code might desire to be compiled as created via your application.

your new form should be public declared. and if you want to access controls on the available that from need to define properties or declare that control protected to public.

object reference not set to an instance of an object