public frmRecharge(frmMain pf, frmCardUser pfu)
{
InitializeComponent();
this.icdev = pf.icdev;
this.pf = pf;
this.pfu = pfu;
}
private void btnOpenIC_Click(object sender, EventArgs e)
{
if (!connectIC)
{
MessageBox.Show("请等待串口打开成功！");
return;
}
f = new frmCardUser(this);
f.ShowDialog();
/*
* if (f == null) //如果子窗体为空则创造实例 并显示
* {
* f = new frmCardUser(this);
* f.ShowDialog();
* }
* else
* {
* if (f.IsDisposed)//若子窗体关闭 则打开新子窗体 并显示
* {
* f = new frmCardUser(this);
* f.ShowDialog();
* }
* else
* {
* f.Activate(); //使子窗体获得焦点
* }
* }
* */
}