[2005] Listview Row Height Workaround Issues

[jeffnyc]

I am trying to allow users to adjust font size and space between rows of a listview. Since listview does not support changing row height directly I tried a workaround of inserting blank rows in between. The problem is the bigger the font, the bigger the blank rows. And when I try to change the font size of the blank row directly, it changes the font size but keeps the row height the same as the big font rows...

I know this code is a bit messy. Basically it is a listview loaded row by row in a 5 column by 4 row listview. It cycles through pages based on the timer event.

Public Sub TimerFired(ByVal sender As Object, _
           ByVal e As System.EventArgs)

        pkgCnt = frm1.lstApts.CheckedItems.Count
   
   	Dim d As Decimal = (pkgCnt / 20)
        numPages = Decimal.Truncate(d)
   
   	If pkgCnt Mod 20 = 0 Then
            numPages = numPages - 1
        End If
   
        Dim tempRowArray(4) As String
        Dim blankRowArray() As String = {"", " ", " ", " ", " "}
        Dim i As Integer = 0 'use for rows
        Dim j As Integer = 0 'used for hotizontal spacing
        Dim sourceIndex As Integer = 0
        Dim destIndex As Integer = 0
        Dim length As Integer = 5
        Dim exitLoop As Boolean = False
        Dim sourceArray(pkgCnt - 1) As Object

        frm1.lstApts.CheckedItems.CopyTo(sourceArray, 0)
        ListView1.Items.Clear()

        If pkgCnt > 0 Then
            Do Until i > 3 This loads each of the 4 rows
                sourceIndex = (curPage * 20) + (i * 5)
                Array.Clear(tempRowArray, 0, 5)
                Dim lenComp As Integer = pkgCnt - ((curPage * 20) + (i * 5))
                If length > lenComp Then
                    exitLoop = True
                    length = pkgCnt - ((curPage * 20) + (i * 5))
                End If
                Array.Copy(sourceArray, sourceIndex, tempRowArray, destIndex, length)
                Dim ii As New ListViewItem(tempRowArray)
                Me.ListView1.Items.Add(ii)

                Dim fnt As New Font("Times New Roman", 12, FontStyle.Regular, GraphicsUnit.Point)
                For j = 1 To My.Settings.myVertSpace  'This loads the blank rows
                    Dim jj As New ListViewItem(blankRowArray)
                    jj.Font = fnt
                    Me.ListView1.Items.Add(jj)
                Next
                
                If exitLoop Then
                    Exit Do
                End If
                i = i + 1
            Loop
           
             If curPage = numPages Then
                curPage = 0
            Else
                '        Debug.WriteLine("increment pages")
                curPage = curPage + 1
            End If
        End If
    End Sub

The part in red is where it loads the blank rows. My.Settings.myVertSpace is a number between 0 and 5 that tells it how many blank rows to insert in between.

Any suggestions/advice would be appreciated.

[Bulldog]

I don't think there is any way to set the row heights individually.

Something you could do is set OwnerDraw and draw the ListView with your own code. This would take some time to do, but you could then have any layout and appearance that you wanted.

I don't know anything about your app, but rather than having a ListView with multiple sections (separated by blank lines), could you use several ListViews, one for each section? You can still move items between them, so it could still be made to look and behave like one ListView?

The ListView component does also support groups, but I don't have any experience using that feature.

[jeffnyc]

I don't think there is any way to set the row heights individually.

Something you could do is set OwnerDraw and draw the ListView with your own code. This would take some time to do, but you could then have any layout and appearance that you wanted.

I don't know anything about your app, but rather than having a ListView with multiple sections (separated by blank lines), could you use several ListViews, one for each section? You can still move items between them, so it could still be made to look and behave like one ListView?

The ListView component does also support groups, but I don't have any experience using that feature.

Thats an interested idea but it would require some work. I allow the user to move the listview around with arrow keys, plus I allow adjustments to width. I would have to change code everywhere. I was hoping for something simplier. You would think that someone had code for an extended listview tht i could just download and integrate.