VB.NET ListView Questions - vb.net

Question

I have Questions?
If I enter a data in a textbox,
I want my listview to select the same data entered in the textbox,
example,
I have a StudentNumber column in my listview and it has data on it(ex. 123456)
I will enter 123456 in the textbox.
The ListView must select 123456 ?
Please Help
THANK YOU,

Answer 1

I think this will do what you want. It will search the first column of the ListView for the text in the TextBox.
Setup the listview:
With ListView1
.MultiSelect = False 'Ensure only one item selected at a time
.HideSelection = False 'Shows the selection when the textbox changes
'Add some items for testing
.Items.Add("1234")
.Items.Add("1122")
.Items.Add("1133")
End With
Then in the textbox TextChanged changed event:
Private Sub TextBox1_TextChanged(sender As System.Object, e As System.EventArgs) Handles TextBox1.TextChanged
ListView1.SelectedItems.Clear()
Dim foundItem As ListViewItem = ListView1.FindItemWithText(TextBox1.Text, False, 0, False)
If (foundItem IsNot Nothing) Then foundItem.Selected = True
End Sub
Alternatively if you want to specify which column of your ListView to search for the text then this function should do the trick:
Private Sub SelectListViewItem(ByRef listviewSource As ListView, ByVal textToFind As String, ByVal column As Integer)
Dim foundItem As ListViewItem = Nothing
Dim startIndex As Integer = 0
listviewSource.SelectedItems.Clear()
Do Until Not foundItem Is Nothing AndAlso foundItem.SubItems(column).Text = TextBox2.Text
If foundItem Is Nothing Then startIndex = 0 Else startIndex = foundItem.Index + 1
If startIndex > listviewSource.Items.Count - 1 Then Exit Sub 'We have reached end of the listview
foundItem = listviewSource.FindItemWithText(textToFind, True, startIndex)
If foundItem Is Nothing Then Exit Sub
Loop
If (foundItem IsNot Nothing) Then foundItem.Selected = True
End Sub
Usage:
Private Sub TextBox2_TextChanged(sender As System.Object, e As System.EventArgs) Handles TextBox2.TextChanged
SelectListViewItem(ListView1, TextBox2.Text, 1)
End Sub
Warning - In both cases, this may cause your application to perform poorly if you have a lot of items in your listview, in that case you could consider moving the code into a background worker