c# – 如何使用时间间隔在Windows窗体中切换照片？

在每张照片之间切换时,我想显示1Sec的另一个Form(2),然后返回Form(1).

表格(1)中的守则：

public partial class Form1: Form
    {
        public static Timer time;
        public static Form mod;
    public Form1()
    {
        InitializeComponent();
        time = new Timer();
        mod = new Form2();

        mod.Owner = this;
        mod.Show();
        this.Hide();

        RunForm1();
    }

    public void RunForm1()
    {
        for (int i = 0; i < groupSize; i++)
        {
                mod.Owner = this;
                mod.Show();
                this.Hide();
        }
    }
}

表格(2)中的守则：

public partial class Form2: Form
{
        public static Timer time;
        public int index = -1;
        public List<Image> images;
        public DirectoryInfo dI;
        public FileInfo[] fileInfos;


    public Form2()
    {
        InitializeComponent();

        images = new List<Image>();
        time = new Timer();

        dI = new DirectoryInfo(@"C:UsersDocumentsPictures");
        fileInfos = dI.GetFiles("*.jpg",SearchOption.TopDirectoryOnly);
        foreach (FileInfo fi in fileInfos)
            images.Add(Image.FromFile(fi.FullName));

        index = images.Count;
        time.Start();

        RunForm2();
    }

    public void RunForm2()
    {
        Random rand = new Random();

        int randomCluster = rand.Next(0,1);

        while (index != 0)
        {
            pictureBox1.Image = images[Math.Abs(index * randomCluster)];
            setTimer();
            index--;
        }
    }

    public void setTimer()
    {
        if (time.Interval == 4000)
        {
            this.Owner.Show();
            this.Close();
        }
    }

}

我在这段代码中的主要问题是：
1.时间不更新,我的意思是,time.Interval总是设置为100
2.我不知道为什么,但是,照片,从未在picturebox.Image中显示.虽然,在调试模式下,它显示照片被正确选择.

谢谢你的帮助！
罗伊.