文件操作

using System;
using System.IO;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;

class  fileop
...{
        public bool DirState(string d)
        ...{
            //判断目录打开的状态

            string ServerDir = MapPath(".")+"/";
            if(!File.Exists(ServerDir+"DirState.dat"))
            ...{
                StreamWriter sw =File.CreateText(ServerDir+"DirState.dat");
                sw.Write("");
                sw.Close();
            }
            StreamReader sr=new StreamReader(ServerDir+"DirState.dat");
            string tmp = sr.ReadToEnd();
            sr.Close();
            string[] s =tmp.Split(new char []...{'*'});
            bool bl=false;
            foreach(string s1 in s)
            ...{
                if(s1==d)
                ...{
                    bl= true;
                }
            }
            return bl;
        }
        
        public string Space(int b)
        ...{
            //添加空格

            string c ="";
            for(int m =1;m<=b;m++)
            ...{
                c+="&nbsp;&nbsp;&nbsp;&nbsp;";
            }
            return c;
        }
        public string ShortDir(string s)
        ...{
            //将文件的绝对路径转为相对路径

            string ServerDir = MapPath(".")+"/";
            string d=s.Substring(ServerDir.Length,s.Length-ServerDir.Length);
            return d;
        }
        public string OtherName(string s)
        ...{
            //获取特殊名称，仅为 javascript:Go("...",".../...");

            string ServerDir = MapPath(".")+"/";
            string tmp = s.Remove(0,ServerDir.Length);
            string [] name =tmp.Split(new char []...{'/'});
            string d="";
            for(int i=0;i<name.Length;i++)
            ...{
                if(i!=0)
                ...{
                    d+="/"+"/"+name[i];
                }
                else
                ...{
                    d+=name[i];
                }
            }
            return d;
        }
        public void BrowseDir(string s,int i,bool b)
        ...{
            //浏览目录

            DirectoryInfo dir =new DirectoryInfo(s);
            foreach(DirectoryInfo di in dir.GetDirectories())    //添加目录信息
            ...{
                long ii = this.DirSize(di.FullName);    
                string size="";
                if(ii>=1024)
                ...{
                    size = (ii/1024).ToString()+"&nbsp; KB";
                }
                else
                ...{
                    size = ii.ToString()+"&nbsp; 字节";
                }

                if(b||this.Expand(this.ShortDir(di.FullName))||this.DirState(this.ShortDir(di.FullName)))   //此目录为“打开”状态
                ...{
                    this.AddDirState(this.ShortDir(di.FullName));
                    this.td1.Controls.Add(new LiteralControl(this.Space(i)+"<input type="checkbox" name=""+this.ShortDir(di.FullName)));
                    this.td1.Controls.Add(new LiteralControl( ""value="dir"><IMG alt="" src="OPENFOLD.BMP">&nbsp;&nbsp;<a href="javascript: Go('open','"+this.OtherName(di.FullName)+"');">"));
                    this.td1.Controls.Add(new LiteralControl(di.Name+"</a>"+this.Space(2)+"<font size=2>"+size+this.Space(1)));
                    this.td1.Controls.Add(new LiteralControl(di.LastWriteTime.ToShortDateString()+"  "+di.LastWriteTime.ToShortTimeString()+"</font><br>"));
                    if(b||this.Expand(this.ShortDir(di.FullName)))   //此目录为“展开” 
                    ...{
                        this.BrowseDir(di.FullName,i+2,true);   //继续展开子目录
                    }
                    else             //此目录为“打开”
                    ...{
                        this.BrowseDir(di.FullName,i+2,false);    //显示此目录所有的文件及子目录
                    }
                }
                else           //此目录为“关闭”状态
                ...{
                    this.td1.Controls.Add(new LiteralControl(this.Space(i)+"<input type="checkbox" name=""+this.ShortDir(di.FullName)));
                    this.td1.Controls.Add(new LiteralControl( ""value="dir"><IMG alt="" src="CLSDFOLD.BMP">&nbsp;&nbsp;<a href="javascript: Go('open','"+this.OtherName(di.FullName)+"');">"));
                    this.td1.Controls.Add(new LiteralControl(di.Name+"</a>"+this.Space(2)+"<font size=2>"+size+this.Space(1)));
                    this.td1.Controls.Add(new LiteralControl(di.LastWriteTime.ToShortDateString()+"  "+di.LastWriteTime.ToShortTimeString()+"</font><br>"));
                }

            }
            foreach(FileInfo fi in dir.GetFiles())
            ...{
                string fi_tmp="";
                if(fi.Length>=1024)
                ...{
                    fi_tmp = (fi.Length/1024).ToString()+"&nbsp; KB";
                }
                else
                ...{
                    fi_tmp = fi.Length.ToString()+"&nbsp; 字节";
                }

                //添加文件信息

                this.td1.Controls.Add(new LiteralControl(this.Space(i)+"<input type="checkbox" name=""+this.ShortDir(fi.FullName)));
                this.td1.Controls.Add(new LiteralControl( ""value="file"><IMG alt="" src="TXT.BMP">&nbsp;&nbsp;<a href="javascript: Go('open','"+this.OtherName(fi.FullName)+"');">"));
                    this.td1.Controls.Add(new LiteralControl(fi.Name+"</a>"+this.Space(2)+"<font size=2>"+fi_tmp+this.Space(1)));
                this.td1.Controls.Add(new LiteralControl(fi.LastWriteTime.ToShortDateString()+" "+fi.LastWriteTime.ToShortTimeString()+"</font><br>"));
            }        
        }

        public bool Expand(string s)
        ...{
            //判断此目录是否需要展开
            string[] tmp=this.Expand_Dir.Split(new char []...{'*'});
            bool b =false;
            foreach(string dd in tmp)
            ...{
                if(dd==s)
                ...{
                    b=true;
                }
            }
            return b;
        }
        public void NameExisted(int i,string s, out string ss)
        ...{
            //如果文件名称已存在，则重新命名

            string[] tmp =s.Split(new char []...{'/'});
            string name=tmp[tmp.Length-1];    //从文件的绝对路径名分离出文件名              
            int l=s.LastIndexOf("/")+1;
        A:    int j=name.LastIndexOf(")")-name.LastIndexOf("("); 
            if(Directory.Exists(s))              //文件夹的重新命名
              ...{
                  i++;
                  if(j>1&&name.Length==name.LastIndexOf(")")+1)         //判断是否以（i）结尾
                  ...{
                      name=name.Remove(name.LastIndexOf("("),j+1);
                  }
                  name+="("+i.ToString()+")";
                  s=s.Remove(l,s.Length-l);
                  s+=name;
                  goto A;
              }
              else if(File.Exists(s))        //重新命名文件
              ...{
                  i++;
                  int n =name.LastIndexOf(".");
                  if(n<0)                         //是否有后缀名
                  ...{
                      if(j>1&&name.Length==name.LastIndexOf(")")+1)
                      ...{
                          name=name.Remove(name.LastIndexOf("("),j+1);
                      }
                      name+="("+i.ToString()+")";
                  }
                  else
                  ...{
                      if(j>1 && n==name.LastIndexOf(")")+1)    //后缀名是否紧挨着（i）
                      ...{
                          name=name.Remove(name.LastIndexOf("("),j+1);
                      } 
                      
                      name=name.Insert(name.LastIndexOf("."),"("+i.ToString()+")");
                  }
                  s=s.Remove(l,s.Length-l);
                  s+=name;
                  goto A;
              }
            ss=s;
        }

        public void ClearDirState()
        ...{
            //清理  DirState.dat 文件

            string ServerDir = MapPath(".")+"/";
            StreamReader sr = new StreamReader(ServerDir+"DirState.dat");
            string tmp = sr.ReadToEnd();
            sr.Close();
            string[] tmp2 = tmp.Split(new char []...{'*'});
            foreach(string s in tmp2)
            ...{
                if(s!="")
                ...{
                    if(!Directory.Exists(ServerDir+s))
                    ...{
                        tmp=tmp.Replace(s+"*","");
                    }
                }
            }
            StreamWriter sw =File.CreateText(ServerDir+"DirState.dat");
            sw.Write(tmp);
            sw.Close();
        }

        public void AddDirState(string s)
        ...{
            //向 DirState.dat 添加目录

            string ServerDir = MapPath(".")+"/";
            StreamReader sr=new StreamReader(ServerDir+"DirState.dat");
            string tmp = sr.ReadToEnd();
            sr.Close();
            if(tmp.IndexOf(s+"*")<0)
            ...{
                StreamWriter sw =File.AppendText(ServerDir+"DirState.dat");
                sw.Write(s+"*");
                sw.Close();
            }
        }

        public long DirSize(string s)
        ...{
            //获取目录的大小

            long i=0L;
            DirectoryInfo dir = new DirectoryInfo(s);
            foreach (FileInfo f in dir.GetFiles())
            ...{
                i+=f.Length;
            }
            foreach(DirectoryInfo subdir in dir.GetDirectories())
            ...{
                i+=this.DirSize(subdir.FullName);
            }
            return i;
        }

        public bool CheckName(string s)
        ...{
            //检查文件名是否合法

            bool b=true;
            if(s.IndexOfAny(new char[]...{'?','/','/','<','>',':','*','"','|'})>=0||s=="")
            ...{
                b=false;
            }
            return b;
        }

        public void CopyDir(string s, string d)      
        ...{
            //复制目录的方法

            Directory.CreateDirectory(d);
            DirectoryInfo di =new DirectoryInfo(s);
            foreach(DirectoryInfo dir in di.GetDirectories())
            ...{
                this.CopyDir(dir.FullName,d+"/"+dir.Name);
            }
            foreach(FileInfo fi in di.GetFiles())
            ...{
                fi.CopyTo(d+"/"+fi.Name,true);
            }
        }
}