ListView will not display added values

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I am having the hardest time with ListView today. The code looks good but when i run it i do not see data in the ListView (it's just totally blank). Please help, I have tried everything but still can't get it to working

VB

Dim T As New Form1

Dim arr(3) As String

arr(0) = "a"
arr(1) = "b"
arr(2) = "c"
arr(3) = "d"

Dim itm As System.Windows.Forms.ListViewItem = New System.Windows.Forms.ListViewItem(arr)

T.ListViewRev.Items.Add(itm)

T.ShowDialog()

Posted 18-Feb-13 16:41pm

juno101

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Sergey Alexandrovich Kryukov 18-Feb-13 23:17pm

Please add the tag: WinForms.
—SA

3 solutions

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*Karthik Harve* · Answer 1 · 2013-02-18T17:19:00

Solution 1

Hi,

i suggest you to bind the list view on Load event of Form1.

VB

'Open the Form1
Dim T As New Form1
T.ShowDialog()

VB

'Form1 Load event
Protected Sub Form1_Load(sender As Object, e As EventArgs)

'Bind the list view
Dim arr(3) As String
 
arr(0) = "a"
arr(1) = "b"
arr(2) = "c"
arr(3) = "d"
 
Dim itm As System.Windows.Forms.ListViewItem = New System.Windows.Forms.ListViewItem(arr)
 
ListViewRev.Items.Add(itm)
End Sub

hope it works.

Posted 18-Feb-13 17:19pm

Karthik Harve

Comments

juno101 19-Feb-13 11:42am

I guess the only way to populate the ListView is to have the code run inside the Form Sub (Form1_Load). Interesting, considering that one can populate a ListBox via creating a Form object and dumping data into the TextBox, ListBox . . . .

I still don't understand . . . I am able to just move my code to the Form Sub. However it would be nice to understand why one can not populate data via creating an instance of the Form class and pushing data into it's ListView .

Sergey Alexandrovich Kryukov · Answer 2 · 2013-02-18T17:27:00

This is not how it works. This constructor of ListViewItem creates an item with sub-items:
http://msdn.microsoft.com/en-us/library/faw83h4f.aspx[^].

Sub-items are used in the View with the value System.Windows.Forms.View.Details, which show Columns, so you need to set the View property, define columns, etc. Please see:
http://msdn.microsoft.com/en-us/library/system.windows.forms.listview.view.aspx[^],
http://msdn.microsoft.com/en-us/library/system.windows.forms.view.aspx[^].

The last MSDN page referenced above shows a code sample with Details, Columns and sub-items. If this is what you wanted, check it and add what is missing from your code. If you need different kind of view, read the documentation more.

—SA

juno101 · Answer 3 · 2013-02-19T08:18:00

Solution 3

I think the problem was that i needed to add a column

Posted 19-Feb-13 8:18am