如何在C＃中检测字符串中最后按下的键的位置？

Question

I'm entering data in a datagridview.

Say I've entered 678.56 in a cell. Now if I again press digit 6 after 678,

I want to know the last pressed key's position in the string. Text.IndexOf(e.KeyChar) is giving me position 0 (as there is also a 6).

But I need to know the currently pressed key's position. I'm using KeyPress event.

Edit: I'm using string value taken from a cell of datagridview. It's not a textbox. I'm creating a eventhandler as KeyPress.

Answer 1

查看TextBox.SelectionStart之前的字符。

Answer 2

You could use this in your KeyPress event:

private void textBox1_KeyPress(object sender, KeyPressEventArgs e) {
        int position = textBox1.SelectionStart;
}

Answer 3

尝试使用KeyRelease事件，即当e.KeyChar将返回按下的键的值（在这种情况下释放）。