form1窗口里
private void timer1_Tick(object sender, EventArgs e)
{
DateTime timeend = Convert.ToDateTime(textBox2.Text);//设置结束时间
textBox1.Text = dt.GetDateTimeFormats('M')[0].ToString();//设置当前时间
string timeday = DateAndTime.DateDiff("d", timeend, DateTime.Now, FirstDayOfWeek.Sunday, FirstWeekOfYear.FirstFourDays).ToString();
long time = long.Parse(timeday);
if (time > 0)//判断倒计时时间是否大于0
label1.Text = "倒计时已设置,剩余" + time + "day";//显示倒计时
else
{
label1.Text = "时间已到";
Form1 f1 = (Form1)this.Owner; //获得form1属性
f1.Enabled = false;
}
form2窗口
private void Form2_Load(object sender, EventArgs e)
{
Form1 f2 = new Form1(); //实例化FORM2
f2.Owner = this; //指定form1是form2的父窗体
f2.ShowDialog(); //打开Form2
}
希望form1的时间到,form2窗体禁止任何操作,但是我的总是提示f1.Enabled = false;未将对象引用设置到对象的实例,求大神帮帮忙,小女子感激不尽!!!!