public void Process(System.Web.HttpContext context)
        {
            context.Response.AppendHeader("DASL", "<DAV:sql>");
            context.Response.AppendHeader("DAV", "1, 2");

context.Response.AppendHeader("Public", "OPTIONS, TRACE, GET, HEAD, DELETE, PUT, POST, COPY, MOVE, MKCOL, PROPFIND, PROPPATCH, LOCK, UNLOCK, SEARCH");

context.Response.AppendHeader("Allow", "OPTIONS, TRACE, GET, HEAD, DELETE, PUT, COPY, MOVE, PROPFIND, PROPPATCH, SEARCH, LOCK, UNLOCK");
        }

#endregion
    }

public void Process(System.Web.HttpContext context)
        {
            context.Response.ContentType = "text/xml";

string token = Guid.NewGuid().ToString() + ":" + DateTime.Now.Ticks.ToString() ;

context.Response.AppendHeader("Lock-Token", "<opaquelocktoken:" + token + ">");
          
            string xml = @"<?xml version=""1.0""?>
<a:prop xmlns:a=""DAV:""><a:lockdiscovery>
<a:activelock><a:locktype><a:write/></a:locktype>
<a:lockscope><a:exclusive/></a:lockscope><owner xmlns=""DAV:"">Administrator</owner><a:locktoken>
<a:href>opaquelocktoken:{0}</a:href></a:locktoken>
<a:depth>0</a:depth><a:timeout>Second-180</a:timeout></a:activelock></a:lockdiscovery>
</a:prop>";

context.Response.Write( String.Format( xml , token ) );
            context.Response.End();
        }

#endregion
    }

public void Process(System.Web.HttpContext context)
        {            
        }

#endregion
    }

static public Document FromPostFile(System.Web.HttpPostedFile file , User user )
       {
           Document doc = new Document(file);
           doc.CreateTime = DateTime.Now;
           doc.CreatorId = user.Id;
           doc.CreatorName = user.Name; 
           doc.DeptId = user.OrgId;
           doc.DeptName = user.OrgName;
           return doc;
       }

public Document(System.Web.HttpPostedFile file)
        {
            string[] strs = file.FileName.Split( '\\' );
            this.Name = strs[strs.Length - 1];
            Size = file.ContentLength;
            //读取文件的数据
            this.Content = new byte[Size];
            Stream fileDataStream = file.InputStream;
            fileDataStream.Read( this.Content , 0, Size );
            ContentType = file.ContentType;
        }

private int _DocumentId;
      /// <summary>
      ///   任务名
      /// </summary>
      private string _Name;
      /// <summary>
      ///   任务描述
      /// </summary>
      private string _Description;
      /// <summary>
      ///   报表创建时间
      /// </summary>
      private DateTime _CreateTime = DateTime.Now ;
      private int _Size = 0 ;
       private byte[] _Data;
      /// <summary>
      ///   创建人Id
      /// </summary>
      private string _CreatorId;
      /// <summary>
      ///   创建人名
      /// </summary>
      private string _CreatorName;

private int _CreateYear;
      private string _ContentType;
      /// <summary>
      ///   部门ID(便于统计)
      /// </summary>
      private string _DeptId;
      /// <summary>
      ///   部门名
      /// </summary>
      private string _DeptName;   
      // Property DocumentId
      public int DocumentId   
      {
         get
         {
            return _DocumentId;
         }
         set
         {
            this._DocumentId = value;
         }
      }      
      // Property Name
      public string Name   
      {
         get
         {
            return _Name;
         }
         set
         {
             this._Name = value;
         }
      }      
      // Property Description
      public string Description   
      {
         get
         {
            return _Description;
         }
         set
         {
             this._Description = value;
         }
      }      
      // Property CreateTime
      public DateTime CreateTime   
      {
         get
         {
            return _CreateTime;
         }
         set
         {
            this._CreateTime = value;
         }
      }
       private DateTime _ModifyTime = DateTime.Now;
       public DateTime ModifyTime
       {
           get
           {
               return _ModifyTime;
           }
           set
           {
               this._ModifyTime = value;
           }
       }      
      // Property Size
      public int Size   
      {
         get
         {
            return _Size;
         }
         set
         {
            this._Size = value;
         }
      }      
      // Property Data
      public byte[] Content   
      {
         get
         {
            return _Data;
         }
         set
         {
            this._Data = value;
         }
      }      
      // Property CreatorId
      public string CreatorId   
      {
         get
         {
            return _CreatorId;
         }
         set
         {
            this._CreatorId = value;
         }
      }

// Property CreatorName
      public string CreatorName
      {
          get
          {
              return _CreatorName;
          }
          set
          {
              this._CreatorName = value;
          }
      }      
      // Property CreateYear
      public int CreateYear   
      {
         get
         {
            return _CreateYear;
         }
         set
         {
            this._CreateYear = value;
         }
      }      
      // Property ContentType
      //application/msword
      //text/plain
      public string ContentType   
      {
         get
         {
            return _ContentType;
         }
         set
         {
             this._ContentType = value;
         }
      }

// Property DeptId
      public string DeptId
      {
          get
          {
              return _DeptId;
          }
          set
          {
              if (this._DeptId != value)
                  this._DeptId = value;
          }
      }
      // Property DeptName
      public string DeptName
      {
          get
          {
              return _DeptName;
          }
          set
          {
              this._DeptName = value;
          }
      }

private string _Type;
       public string OwnerType
       {
           get
           {
               return _Type;
           }
           set
           {
               this._Type = value;
           }
       }
       private bool _TemplateAble;
      /// <summary>
      /// 是否可以作为模版
      /// </summary>
       public bool Templateable
       {
           get
           {
               return _TemplateAble;
           }
           set
           {
               this._TemplateAble = value;
           }
       }
       public override string ToString()
       {
           return Encoding.UTF8.GetString(this.Content);
       }

public static Document FromString(string s, User user)
       {
           Document doc = new Document();
           doc.CreateTime = DateTime.Now;
           doc.CreatorId = user.Id;
           doc.CreatorName = user.Name;
           doc.DeptId = user.OrgId;
           doc.DeptName = user.OrgName;
           doc.Content = Encoding.UTF8.GetBytes(s);
           doc.Size = doc.Content.Length;
           doc.ContentType = "text/plain";
           return doc;
       }
      public static string ByteToString( byte[] bytes )
      {
          return Encoding.UTF8.GetString( bytes );
      }
       public static byte[] StringToByte(string s)
       {
           return Encoding.UTF8.GetBytes(s); 
       }
       public string GetExtendName()
       {
           string[] arr = this.Name.Split( '.' );

if (arr.Length < 1) return "";
           else return arr[ arr.Length - 1 ];
       }   
   }

IWebdavDocumentHandler docSvr = new DefaultWebdavDocumentHandler(); //修改此处代码，实现不同的数据操作逻辑，可引入工厂模式
            Document doc = docSvr.GetDocument(id);

if (doc == null)
            {
                context.Response.Write("文档不存在！");
                return;
            }

context.Response.Clear();
            context.Response.ContentType = doc.ContentType;
            //下载文件名限制32字符 16 汉字
            int maxlength = 15;
            string fileName = doc.Name; //att.FileName ;
            if (fileName.Length > maxlength)
            {
                fileName = "-" + fileName.Substring(fileName.Length - maxlength, maxlength);
            }

fileName = HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF8); //必须编码，不然文件名会出现乱码
            context.Response.AppendHeader("Content-Disposition", "attachment;filename=" + fileName + "");

if (doc.Content != null && doc.Content.Length > 0)
                context.Response.BinaryWrite(doc.Content);

context.Response.End();
        }
        #endregion
    }

public void Process(System.Web.HttpContext context)
        {
            int docId = WebdavProtocolHandler.GetDocumentId(context);

Document doc = GetDocFromInput(context.Request);

doc.DocumentId = docId;

IWebdavDocumentHandler docSvr = new DefaultWebdavDocumentHandler(); //修改此处代码，实现不同的数据操作逻辑，可引入工厂模式

docSvr.ModifyDocContent( doc.DocumentId , doc.Content );
        }

private Document GetDocFromInput(System.Web.HttpRequest request )
        {
            Document doc = new Document();
            //读取文件的数据
            doc.Content = new byte[ request.ContentLength ];
            doc.Size = request.ContentLength;
            Stream fileDataStream = request.InputStream;
            fileDataStream.Read( doc.Content , 0, doc.Size );
            doc.ContentType = request.ContentType;
            return doc;
        }
        #endregion
    }

if( vh == null )
                return ;

vh.Process(context);      
        }

private IVerbHandler GetVerbHandler(string verb)
        {
            switch (verb)
            {
                case "LOCK" :
                    return new LockHandler();
                case "UNLOCK":
                    return new UnLockHandler();
                case "GET":
                    return new GetHandler();
                case "PUT":
                    return new PutHandler();               
                case "OPTIONS":
                    return new OptionsHandler();
                default :
                    return null;
            }
        }    
        public bool IsReusable
        {
            get { return false; }
        }
    }