Fired after a new item has been selected.
Type | Description |
The Selection changed event notifies your application that a new item is selected. Use the SelectedItem property to determine the handle of the selected item. Use the Select property to determine the selected value on a specific column. Use the Value property to specify the selected value on a single column control. Use the SelectItem property to select an item given its handle. The Change event is fired if the drop-down portion of the control is visible, and the user clicks an item or presses the Enter key. The SelectableItem property specifies whether the user can select an item. The SearchColumnIndex property indicates the index of the column that has the focus. The AssignEditImageOnSelect property specifies whether the control displays the cell's icon when selection is changed. The AssignEditImageOnSelect property has effect if the Style property is DropDown. The Click event is fired, if the user selects a new item, and the FireClickOnSelect property is True.
The following samples show options to get the selected item when the user changes the selected item:
The following VB sample displays the selected item, using the Select property:
Private Sub ComboBox1_SelectionChanged() With ComboBox1 Debug.Print .Select(.SearchColumnIndex) End With End Sub
The following VB sample displays the selected item, using the Items.SelectedItem property:
Private Sub ComboBox1_SelectionChanged() With ComboBox1.Items Dim h As HITEM h = .SelectedItem() If (Not h = 0) Then Debug.Print .CellCaption(h, 0) End If End With End Sub
The following C++ sample displays the selected item, using the Select property:
void OnSelectionChangedCombobox1() { OutputDebugString( m_combobox.GetEditText( COleVariant(m_combobox.GetSearchColumnIndex() ) ) ); }
The following C++ sample displays the selected item, using the Items.SelectedItem property:
void OnSelectionChangedCombobox1() { CItems items = m_combobox.GetItems(); long hItem = items.GetSelectedItem( 0 ); if ( hItem != 0 ) OutputDebugString( V2S( &items.GetCellCaption( COleVariant( hItem ), COleVariant( long(0) ) ) ) ); }
where the V2S function converts a VARIANT value to a string,
static CString V2S( VARIANT* pv, LPCTSTR szDefault = _T("") ) { if ( pv ) { if ( pv->vt == VT_ERROR ) return szDefault; COleVariant vt; vt.ChangeType( VT_BSTR, pv ); return V_BSTR( &vt ); } return szDefault; }
The following VB.NET sample displays the selected item, using the Select property:
Private Sub AxComboBox1_SelectionChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles AxComboBox1.SelectionChanged With AxComboBox1 Debug.WriteLine(.get_Select(.SearchColumnIndex)) End With End Sub
The following VB.NET sample displays the selected item, using the Items.SelectedItem property:
Private Sub AxComboBox1_SelectionChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles AxComboBox1.SelectionChanged With AxComboBox1.Items Dim h As Integer = .SelectedItem() If (Not h = 0) Then Debug.WriteLine(.CellCaption(h, 0)) End If End With End Sub
The following C# sample displays the selected item, using the Select property:
private void axComboBox1_SelectionChanged(object sender, EventArgs e) { System.Diagnostics.Debug.WriteLine(axComboBox1.get_Select(axComboBox1.SearchColumnIndex)); }
The following C# sample displays the selected item, using the Items.SelectedItem property:
private void axComboBox1_SelectionChanged(object sender, EventArgs e) { EXCOMBOBOXLib.Items items = axComboBox1.Items; int hItem = items.get_SelectedItem(0); if ( hItem != 0 ) System.Diagnostics.Debug.WriteLine(items.get_CellCaption(hItem,0).ToString()); }
The following VFP sample displays the selected item, using the Select property:
*** ActiveX Control Event *** With thisform.ComboBox1 wait window nowait .Object.Select(.SearchColumnIndex()) EndWith
The following VFP sample displays the selected item, using the Items.SelectedItem property:
*** ActiveX Control Event *** With thisform.ComboBox1.Items .DefaultItem = .SelectedItem(0) If (.DefaultItem <> 0) Then wait window nowait .CellCaption(0, 0) EndIf EndWith
private void SelectionChanged(object sender) { } Private Sub SelectionChanged(ByVal sender As System.Object) Handles SelectionChanged End Sub |
private void SelectionChanged(object sender, EventArgs e) { } void OnSelectionChanged() { } void __fastcall SelectionChanged(TObject *Sender) { } procedure SelectionChanged(ASender: TObject; ); begin end; procedure SelectionChanged(sender: System.Object; e: System.EventArgs); begin end; begin event SelectionChanged() end event SelectionChanged Private Sub SelectionChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles SelectionChanged End Sub Private Sub SelectionChanged() End Sub Private Sub SelectionChanged() End Sub LPARAMETERS nop PROCEDURE OnSelectionChanged(oComboBox) RETURN |
<SCRIPT EVENT="SelectionChanged()" LANGUAGE="JScript"> </SCRIPT> <SCRIPT LANGUAGE="VBScript"> Function SelectionChanged() End Function </SCRIPT> Procedure OnComSelectionChanged Forward Send OnComSelectionChanged End_Procedure METHOD OCX_SelectionChanged() CLASS MainDialog RETURN NIL void onEvent_SelectionChanged() { } function SelectionChanged as v () end function function nativeObject_SelectionChanged() return |