public void FindExifinfo(string filePath){Image img = Image.FromFile(filePath);PropertyItem[] pt = img.PropertyItems;for (int i = 0; i < pt.Length; i++){PropertyItem p = pt[i];            switch (pt[i].Id){  // 设备制造商 20. case 0x010F:this.textBox1.Text = System.Text.ASCIIEncoding.ASCII.GetString(pt[i].Value);break;           case 0x0110: // 设备型号 25. this.textBox4.Text = GetValueOfType2(p.Value);break;case 0x0132: // 拍照时间 30.this.textBox2.Text = GetValueOfType2(p.Value);break;         case 0x829A: // .曝光时间 this.textBox3.Text = GetValueOfType5(p.Value)+" sec";break;case 0x8827: // ISO 40.  this.textBox5.Text = GetValueOfType3(p.Value);break;case 0x010E: // 图像说明info.descriptionthis.textBox6.Text = GetValueOfType2(p.Value);break;case 0x920a: //相片的焦距this.textBox7.Text = GetValueOfType5A(p.Value) + " mm";break;case 0x829D: //相片的光圈值this.textBox8.Text = GetValueOfType5A(p.Value);break;default:break;}}}public string GetValueOfType2(byte[] b)// 对type=2 的value值进行读取
        {return System.Text.Encoding.ASCII.GetString(b);}private static string GetValueOfType3(byte[] b) //对type=3 的value值进行读取
        {if (b.Length != 2) return "unknow";return Convert.ToUInt16(b[1] << 8 | b[0]).ToString();}private static string GetValueOfType5(byte[] b) //对type=5 的value值进行读取
        {if (b.Length != 8) return "unknow";UInt32 fm, fz;fm = 0;fz = 0;fz = Convert.ToUInt32(b[7] << 24 | b[6] << 16 | b[5] << 8 | b[4]);fm = Convert.ToUInt32(b[3] << 24 | b[2] << 16 | b[1] << 8 | b[0]);return fm.ToString() + "/" + fz.ToString()+" sec";}
private static string GetValueOfType5A(byte[] b)//获取光圈的值
        {if (b.Length != 8) return "unknow";UInt32 fm, fz;fm = 0;fz = 0;fz = Convert.ToUInt32(b[7] << 24 | b[6] << 16 | b[5] << 8 | b[4]);fm = Convert.ToUInt32(b[3] << 24 | b[2] << 16 | b[1] << 8 | b[0]);double temp = (double)fm / fz;return (temp).ToString();}