类似windows explorer的图片浏览器

windows explore在查看文件中有查看缩略图这一选项,他的实质就是从thumbs文件中读取出已经生成的缩略图文件
然后做为image显示出来

在网上有如何读出thumbs文件的类库,今天使用这个类库模仿一下window explorer
类库的源地址
http://www.petedavis.net/MySite/DynPageView.aspx?pageid=31

原理读出thumbs文件中的图像并生成一个picturebox数组,显示图像并放置到窗体上,在picturebox被单击时,击发一个事件
将原图显示出来

private string[] allfilename; 
ThumbDBLib.ThumbDB test;
private PictureBox[] allimage;

private void button1_Click(object sender, System.EventArgs e)
...{
    this.Invalidate();

    test=new ThumbDB(this.textBox1.Text);
    allfilename=test.GetThumbfiles();
    allimage=new PictureBox[allfilename.Length];

    int x=0,y=50;

    int i=0;
    foreach(string bb in allfilename)
    ...{
        allimage[i]=new PictureBox();
        allimage[i].Location=new Point(x,y);
        Image gotimg=test.GetThumbnailImage(bb);
 

        x+=80;
        if(x>this.Width)
        ...{
            x=0;
            y+=80;
        }
        allimage[i].Image=gotimg;
 
        allimage[i].Size=new Size(75,75);
        allimage[i].SizeMode=PictureBoxSizeMode.StretchImage;
        allimage[i].Click+=new EventHandler(ImageControl_Click);
        allimage[i].Tag=bb; 
        

        this.Controls.Add(allimage[i]);
        //this.Refresh();

        i++;
    } 

}


/**//// <summary>
/// 当用户单击时显示大图片
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void ImageControl_Click(object sender, EventArgs e)
...{
    Form showbig=new Form();

    
    string filename=Utitlity.GetDirFromFileName(textBox1.Text)+"/"+(sender as PictureBox).Tag;
    PictureBox pb=new PictureBox();
    Bitmap showmap=new Bitmap(filename);
    pb.Image=showmap;

    pb.Size=new Size(showmap.Width,showmap.Height);
    showbig.Size=new Size(showmap.Width,showmap.Height);
    pb.Location=new Point(0,0);
    
    showbig.Controls.Add(pb);
    if(showbig.ShowDialog()==DialogResult.OK)
    ...{
        showbig.Dispose();
    }
    
}


public class Utitlity
...{
    /**//// <summary>
    /// 从文件名中取出文件路径
    /// </summary>
    /// <param name="filename">文件名</param>
    /// <returns>文件所在的路径</returns>
    public static string GetDirFromFileName(string filename)
    ...{
        string[] allpart=filename.Split('/');            
        return filename.Replace(allpart[allpart.Length-1],string.Empty);
    }
}