vb.net – 如何在运行时更改列表框中的选定项目文本？

Private Sub TextBox1_Leave(sender As Object, e As EventArgs) Handles MyBase.Leave
  ' This way is not working
  ListBox1.SelectedItem = TextBox1.Text
  ' This is not working too
  ListBox1.Items(ListBox1.SelectedIndex) = TextBox1.Text
End Sub

表单看起来像这样：

我需要在用户在文本框中输入时更改该列表文本.是否有可能在运行时这样做？

请尝试使用TextBox的TextChanged事件.

Private Sub TextBox1_TextChanged(sender As Object, e As EventArgs) _
                                 Handles TextBox1.TextChanged

确保检查ListBox中是否实际选择了一个项目：

If ListBox1.SelectedIndex > -1 Then
  ListBox1.Items(ListBox1.SelectedIndex) = TextBox1.Text
End If