C#缩略图多路径多格式保存的实例

using System;
using System.Drawing;
namespace PubLib
{
 /// <summary>
 /// PicShow 的摘要说明。
 /// </summary>
 public class PicShow
 {
  public PicShow()
  {
   //
   // TODO: 在此处添加构造函数逻辑
   //
  }
  //查找图片文件是否存在
  public static string ViewPIC(string PicPath, string PicName)
  {
   string BigPic = Checks.HM_PHYSICSROOT + "MoviePIC/"+Checks.HM_PICROOTPATH+"/"+PicName;
   string SmlPic = Checks.HM_PHYSICSROOT + "MoviePIC/"+PicPath+"/"+PicName;
   if (null==PicName || false==System.IO.File.Exists(BigPic)) //大图名称为空或文件不存在
    PicName = "nopic.jpg";
   string OutPic = "MoviePIC/"+PicPath+"/"+PicName;
   if (!System.IO.File.Exists(SmlPic)) //查找小图不存在
   {
    CreatePIC(PicPath, PicName);
    return OutPic;
   }
   return OutPic;
  }
  //创建缩略图
  public static void CreatePIC(string PicPath, string PicName)
  {
   int iWidth,iHeight;
   if (null!=PicPath && PicPath.IndexOf("X")>1)
   {
    char[] spliter = {X};
    string[] aPicPath = PicPath.Split(spliter,2);
    iWidth  = Int32.Parse(aPicPath[0]);
    iHeight = Int32.Parse(aPicPath[1]);
    string BigPic = Checks.HM_PHYSICSROOT + "MoviePIC/"+Checks.HM_PICROOTPATH+"/"+PicName;
    string SmlPic = Checks.HM_PHYSICSROOT + "MoviePIC/"+PicPath+"/"+PicName;
    Image BigImage = Image.FromFile(BigPic);
    Image SmlImage = BigImage.GetThumbnailImage(iWidth,iHeight,null,new System.IntPtr());
    SmlImage.Save(SmlPic,System.Drawing.Imaging.ImageFormat.Jpeg);
    BigImage.Dispose();
    SmlImage.Dispose();
   }
  }
 }
}