Dynamically add components to a form by button click VB 2010

[nadiam]

Hi. Im using vb 2010. I want to dynamically add textboxes to my form by clicking on a button. I've google searched and so far this code worked:

 Private Sub btn_addline_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn_addline.Click
        Dim txtB1 As New TextBox
        Dim i

        For i = 0 To 5
            Me.Controls.Add(txtB1)
            With txtB1
                .Name = "chkDemo" & i
            End With
        Next i
    End Sub

but it only creates one(well as i can see) and i cant tell whether the name is actually set as chkDemo(how to check?). I tried adding .Location = 20,20 but got error something to do with integer. Once i got this down, my goal is to actually dynamically add multiple textboxes or even maybe a combobox at the same time.

thanks in advance

[tinstaafl]

What you need to do is create the control in the loop:

Private Sub btn_addline_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btn_addline.Click
    Dim i
    For i = 0 To 5
        Dim txtB1 As New TextBox        
        Me.Controls.Add(txtB1)
        With txtB1
            .Name = "chkDemo" & i
        End With
    Next i
End Sub

[Reverend Jim]

I posted this code snippet a while back that I think will show you how to do what you want.

[nadiam]

Hi. thank you @Reverend Jim that did help. how do i create a new row of textboxes everytime button is clicked? As for now when button is clicked 1 row of 3 textboxes is added. I want so every time button is clicked a new row is added.

I changed the Const ROWS and COLS

 Const ROWS = 1       
 Const COLS = 3 

And added this so textbox name is different

 Dim i As Integer
 i += 1
 newbox.Name = "txt_" & i

Later on users will fill in data into the textboxes to be inserted into database, which i will have to figure out how to do later.

[Xavier_5]

Maybe this snippet can do the work. Also, you may add handlers if you wish to, as Reverend's code points out.

Public Class Form1

    Dim vLbl(-1) As Label, vTb(-1) As TextBox, iv As Int32
    Dim posY As Int32
    Private Sub btnAdd_Click(sender As System.Object, e As System.EventArgs) Handles btnAdd.Click
        Try
            Dim btn As Button = CType(sender, Button)
            posY = IIf(iv = 0, btn.Top, posY + btn.Height)
            ReDim Preserve vLbl(iv), vTb(iv)
            vLbl(iv) = New Label
            With vLbl(iv)
                .Top = posY + 4
                .Left = btn.Location.X + btn.Width + 10
                .AutoSize = True
                .Text = "Label " + (iv + 1).ToString
                .Visible = True
                Me.Controls.Add(vLbl(iv))
            End With
            vTb(iv) = New TextBox
            With vTb(iv)
                .Top = posY
                .Left = vLbl(iv).Location.X + 50
                .Visible = True
                Me.Controls.Add(vTb(iv))
            End With
            iv += 1
        Catch ex As Exception

        End Try
    End Sub
End Class

[nadiam]

@Xavier_5 thanks! this helped.

[Xavier_5]

You're welcome. Could you mark as solved? Thanks in advance!