ComboBox.EndUpdate Method ()


Resumes painting the ComboBox control after painting is suspended by the BeginUpdate method.

Namespace:   System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

Public Sub EndUpdate

The preferred way to add items to the ComboBox is to use the AddRange method of the ComboBox.ObjectCollection class (through the Items property of the ComboBox). This enables you to add an array of items to the list at one time. However, if you want to add items one at a time using the Add method of the ComboBox.ObjectCollection class, you can use the BeginUpdate method to prevent the control from repainting the ComboBox each time an item is added to the list. Once you have completed the task of adding items to the list, call the EndUpdate method to enable the ComboBox to repaint. This way of adding items can prevent flickered drawing of the ComboBox when a large number of items are being added to the list.

The following code example shows the usage of the BeginUpdate and EndUpdate methods. The example is part of a code example in the ComboBox class overview.

Private Sub addGrandButton_Click(ByVal sender As Object, ByVal e As System.EventArgs)
    Dim I As Integer
    For I = 0 To 1000
        comboBox1.Items.Add("New Item " + i.ToString())
End Sub

.NET Framework
Available since 1.1
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