根据 C# 中的文本框条目显示列表框项

可能，您正在寻找这样的东西：

• 在表格上ListBox （ myListBox ）
• 放入TextBox（myTextBox在下面的实现中）
• 为文本框实现TextChanged事件处理程序

可能的实现

// When TextBox's Text changed
private void myTextBox_TextChanged(object sender, EventArgs e) {
  string textToFind = (sender as Control).Text;
  // Do all the changes in one go in order to prevent re-drawing (and blinking)
  myListBox.BeginUpdate();
  try {
    myListBox.SelectedIndices.Clear();
    // We don't want selecting anything on empty 
    if (string.IsNullOrEmpty(textToFind))
      return;
    for (int i = 0; i < myListBox.Items.Count; ++i) {
      string actual = myListBox.Items[i].ToString();
      // Now we should compare two strings; there're many ways to do this 
      // as an example let's select the item(s) which start(s) from the text entered, 
      // case insensitive
      if (actual.StartsWith(textToFind, StringComparison.InvariantCultureIgnoreCase)) {
        myListBox.SelectedIndices.Add(i);
        // can we select more than one item == shall we proceed?
        if (myListBox.SelectionMode == SelectionMode.One)
          break;
      }
    }
  }
  finally {
    myListBox.EndUpdate();
  }
}