Asked By
tobias11
0 points
N/A
Posted on - 09/20/2011
I'm having a problem using arrays in VB.NET.
Here's the thing:
This is the initial design of the form during design time. What I want to do is repeatedly create a combo box and a text box for every row in list view.
Here's how it looks like at runtime; since there are two items in list view, there will be two combo boxes and two text boxes:
Now here's where I lost it: the text of the text box will depend on the item chosen from the combo box. Say, if Good is selected from the combo box, $10 should be placed in the text box. What happens is that when I choose Good from the second combo box, the $10 still appears in the first textbox. This, I think, is where I lost it. The $10 appears on the first textbox because I wrote TextBox1.Text = $10; what should I write to call the second text box(created dynamically in runtime)?
If cbo.Text = "Good" Then
TextBox1.Text = "$10"
End If
Here's the whole code, take a look:
Public comboarr() As ComboBox, textarr() As TextBox
Private Sub Form5_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
MS_ListviewSetting(ListView1)
ListView1.Columns.Add("Name")
ListView1.Columns.Add("Contact")
Dim lvitem As New ListViewItem
lvitem.Text = "AA"
lvitem.SubItems.Add("aa")
Dim lvitem1 As New ListViewItem
lvitem1.Text = "BB"
lvitem1.SubItems.Add("bb")
ListView1.Items.Add(lvitem)
ListView1.Items.Add(lvitem1)
ReDim comboarr(ListView1.Items.Count)
ReDim textarr(ListView1.Items.Count)
comboarr(0) = ComboBox1
textarr(0) = TextBox1
loadData()
ComboBox1.Items.Add("Good")
ComboBox1.Items.Add("Lost")
ComboBox1.Items.Add("Damaged")
End Sub
Sub loadData()
For i = 1 To ListView1.Items.Count – 1
Dim btn As New ComboBox()
comboarr(i) = btn
btn.Location = New System.Drawing.Point(comboarr(i – 1).Location.X, comboarr(i – 1).Location.Y + 20)
btn.Size = New System.Drawing.Size(ComboBox1.Size)
btn.DropDownStyle = ComboBoxStyle.DropDownList
btn.Items.Add("Good")
btn.Items.Add("Lost")
btn.Items.Add("Damaged")
btn.SelectedIndex = 0
Me.Controls.Add(btn)
AddHandler btn.Click, AddressOf Me.ClickButton
Dim lbl As New TextBox()
textarr(i) = TextBox1
lbl.Location = New System.Drawing.Point(textarr(i – 1).Location.X, textarr(i – 1).Location.Y + 20)
lbl.Size = New System.Drawing.Size(TextBox1.Size)
Me.Controls.Add(lbl)
Next
End Sub
Private Sub ClickButton(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ComboBox1.Click
Dim cbo As ComboBox
cbo = CType(sender, ComboBox)
' MsgBox(btn.Text)
If cbo.Text = "Good" Then
TextBox1.Text = "$10"
End If
End Sub
Answered By
nepid7
0 points
N/A
#125135
Problem in using control arrays in VB.NET
Hi There,
Here is a solution for it:
Please understand the logic; it's more important
I have done some changes to your code:
1.Textbox is named to txt1 and combo box is named to cbo1 (for ease of reference)
2. The code is changed appears in bold.
Please check this out and if this works, you can improve more on the logic.
Thanks
Dipendra Shah
The changed code is :
Public comboarr() As ComboBox, textarr() As TextBox
Private Sub Form5_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
MS_ListviewSetting(ListView1)
ListView1.Columns.Add("Name")
ListView1.Columns.Add("Contact")
Dim lvitem As New ListViewItem
lvitem.Text = "AA"
lvitem.SubItems.Add("aa")
Dim lvitem1 As New ListViewItem
lvitem1.Text = "BB"
lvitem1.SubItems.Add("bb")
ListView1.Items.Add(lvitem)
ListView1.Items.Add(lvitem1)
ReDim comboarr(ListView1.Items.Count)
ReDim textarr(ListView1.Items.Count)
comboarr(0) = cbo1
textarr(0) = txt1
loadData()
cbo1.Items.Add("Good")
cbo1.Items.Add("Lost")
cbo1.Items.Add("Damaged")
End Sub
Sub loadData()
For i = 1 To ListView1.Items.Count – 1
Dim btn As New ComboBox()
comboarr(i) = btn
btn.Location = New System.Drawing.Point(comboarr(i – 1).Location.X, comboarr(i – 1).Location.Y + 20)
btn.Size = New System.Drawing.Size(cbo1.Size)
btn.DropDownStyle = ComboBoxStyle.DropDownList
btn.Items.Add("Good")
btn.Items.Add("Lost")
btn.Items.Add("Damaged")
btn.SelectedIndex = 0
btn.Name = "cbo" + (i + 1).ToString()
Me.Controls.Add(btn)
AddHandler btn.SelectedIndexChanged, AddressOf Me.ClickButton
Dim lbl As New TextBox()
textarr(i) = txt1
lbl.Name = "txt" + (i + 1).ToString()
lbl.Location = New System.Drawing.Point(textarr(i – 1).Location.X, textarr(i – 1).Location.Y + 20)
lbl.Size = New System.Drawing.Size(txt1.Size)
Me.Controls.Add(lbl)
Next
End Sub
Private Sub ClickButton(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cbo1.SelectedIndexChanged
Dim cbo As ComboBox
cbo = CType(sender, ComboBox)
' MsgBox(btn.Text)
Dim intArrIndex As String
intArrIndex = cbo.Name.Substring(3)
Dim objTXT As New TextBox
For Each ctl As Control In Me.Controls
If (Not TypeOf ctl Is TextBox) Then Continue For
If (ctl.Name.Equals("txt" & intArrIndex)) Then
objTXT = DirectCast(ctl, TextBox)
End If
Next ctl
If cbo.Text = "Good" Then
objTXT.Text = "$10"
ElseIf cbo.Text = "Lost" Then
objTXT.Text = "$20"
Else
objTXT.Text = "$30"
End If
End Sub
