[英]Overriding ComboBox to select item by pressing index through keyboard in C#
I want to override a combobox such that it can be selected by its position in the list by pressing key through keyboard. 我想覆盖一个组合框,以便通过按键盘上的键可以通过其在列表中的位置进行选择。
Example: 例:
ComboBoxMonths
- Jan
- Feb
- Mar
- Apr
- May
- Jun
. . .
When 'J' is pressed Jan is selected, and 'F' for 'Feb' ,.... 当“J”被压扬被选择,和“F”为“月”,....
I want to use it like this, when 我想这样使用它
1 is pressed then Jan , 按1然后1月 ,
2 for Feb , etc. 2表示2月 , 依此类推 。
Is it possible ? 可能吗 ? If yes, How can I achieve that ? 如果是,我该如何实现?
This only works properly if the combo is set to DropDownList, which makes sense in your example. 仅当组合设置为DropDownList时,此方法才能正常工作,这在您的示例中很有意义。 It also only covers 1-9. 它也只涵盖1-9。 If you want to handle more than one digit, it requires more logic with timers. 如果要处理一个以上的数字,则需要使用计时器的更多逻辑。
public class MyComboBox : ComboBox
{
protected override void OnKeyPress(KeyPressEventArgs e)
{
var index = e.KeyChar - '1';
if( index >= 0 && index < this.Items.Count )
this.SelectedIndex = index;
base.OnKeyPress(e);
}
}
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