ClearColumns
Posted by Mohammad Rahhal, Last modified by Abdullah Almasharfah on 07 December 2018 07:48 PM

Syntax

Public Sub ClearColumns()

This method is used to clear all items in list view.

Sample

 Dim colvalues as System.Collections.Generic.List(Of VTLGeneral.VTLControls.ListViewcolumn)
 Dim colvalue as VTLGeneral.VTLControls.ListViewcolumn
 Dim lst as VTLGeneral.VTLControls.VTLListView
 Dim frm as VTLGeneral.VTLForm
 Dim itemvalues as New System.Collections.Generic.List(Of VTLGeneral.VTLControls.ListViewItem)
 Dim itemvalue as VTLGeneral.VTLControls.ListViewItem

Public Sub main()

        lst = New VTLGeneral.VTLControls.VTLListView("lst1")
        frm = New VTLGeneral.VTLForm("frm1")
        frm.AddVTLControl(lst)
        lst.Height = "2000"
        lst.width = "2000"

        Dim btn as VTLGeneral.VTLControls.CChartObjectButton

        btn = New VTLGeneral.VTLControls.CChartObjectButton("btn1")

        frm.AddVTLControl(btn)

        btn.caption = "Clear"

        colvalues = New System.Collections.Generic.List(Of VTLGeneral.VTLControls.ListViewcolumn)

        colvalue = New VTLGeneral.VTLControls.ListViewcolumn
        colvalue.Text = "Col1"
        colvalue.Key = "Col1"
        colvalue.Index = cstr(1)
        colvalues.add(colvalue)

        lst.AddHeader(colvalues)
        colvalues.clear()

        colvalues = New System.Collections.Generic.List(Of VTLGeneral.VTLControls.ListViewcolumn)
        colvalue = New VTLGeneral.VTLControls.ListViewcolumn
        colvalue.Text = "Col2"
        colvalue.Key = "Col2"
        colvalue.Index = cstr(2)
        colvalues.add(colvalue)

        lst.AddHeader(colvalues)
        colvalues.clear()

        frm.show()

        itemvalue = New VTLGeneral.VTLControls.ListViewItem
        itemvalue.Text = "Data"
        itemvalue.Key = "S" 
        itemvalue.Index = CSTR(1)
        itemvalue.AddSubItem("info1")

        itemvalues.add(itemvalue)

        lst.AddListItem(itemvalues)

 End Sub

 Public Sub frm1_btn1_click()

        colvalues = New System.Collections.Generic.List(Of VTLGeneral.VTLControls.ListViewcolumn)
        colvalue = New VTLGeneral.VTLControls.ListViewcolumn
        colvalues.clear()
        lst.ClearListItems()

End Sub


See Also


Back to VTL Server Script Index

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