代码如下:
private void txtXgongzi_KeyPress(object sender, KeyPressEventArgs e)
{
if (e.KeyChar != 8 && !char.IsDigit(e.KeyChar))
{
MessageBox.Show("只能输入数字","提示",MessageBoxButtons.OK ,MessageBoxIcon.Information );
e.Handled=true;//已经处理此事件
}
}