单击C＃中的文本框时更改背景颜色

Question

I like for the textbox to change the background when the textbox has focus (if clicked with a mouse, tabbed into, etc).

I don't like the textchange method since it won't change until one character has been added.

private void txtFoo_OnGotFocus(object sender, EventArgs e)
    {
        txtFoo.BackColor = Color.LightYellow;
        txtBar.BackColor = Color.White;
    }

This doesn't seem to work for me. What am I doing wrong?

Answer 1

您是否还订阅了事件处理程序？

Answer 2

Like Ben said... did you subscribe to the event handler?

Is your code even executing? You can put a break point in there and check pretty easily.

Answer 3

txtWFileNo.Style.Add(HtmlTextWriterStyle.BackgroundColor, "silver");

Answer 4

You could try using the Enter event instead

private void txtFoo_Enter(object sender, EventArgs e)
{
    txtFoo.BackColor = Color.LightYellow;
    txtBar.BackColor = Color.White;
}