「VB.NET」リストボックス(ListBox)のアイテムを削除

1.指定項目を削除
書式
ListBox名.Items.Remove(“項目名”)
使用例

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

    Dim count As Integer

    ListBox1.Items.Remove("B002")
    '項目数を取得
    count = ListBox1.Items.Count
    TextBox1.Text = "項目数: " + count.ToString

End Sub

2.指定位置の項目を削除
書式
ListBox名.Items.RemoveAt(削除位置)

使用例

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

    Dim count As Integer

    ListBox1.Items.RemoveAt(2)
    '項目数を取得
    count = ListBox1.Items.Count
    TextBox1.Text = "項目数: " + count.ToString

End Sub

3.全てを削除
書式
ListBox名.Items.Clear()

使用例

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

    Dim count As Integer

    ListBox1.Items.Clear()
    '項目数を取得
    count = ListBox1.Items.Count
    TextBox1.Text = "項目数: " + count.ToString

End Sub

 

VB.net

Posted by arkgame