公用帮助文件处理类

 

using System;
using System.Text;
using System.Xml;
using System.Data;
using System.Collections;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Configuration;
using System.IO;


namespace my.IO
...{
    /**//// <summary>
    /// 公用帮助文件处理类
    /// </summary>
    public class FileHelper
    ...{
        /**//// <summary>
        /// 构造函数
        /// </summary>
        private FileHelper()
        ...{
        }

        上传文件#region 上传文件

        /**//// <summary>
        /// 上传文件
        /// </summary>
        /// <param name="inputFile">html上传控件</param>
        /// <param name="uploadDirectory">上传到服务器目录</param>
        /// <param name="limitSite">上传文件大小限制(单位：字节)</param>
        /// <param name="fileName">输出文件名</param>
        /// <returns>返回操作逻辑值</returns>
        public static bool SaveAccessory(HtmlInputFile inputFile, string uploadDirectory, int limitSite,out string fileName)
        ...{
            string acc = inputFile.PostedFile.FileName;//文件及路径名
            string accessory = string.Empty; //记录文件名
            fileName = string.Empty; //输出文件名

            if(inputFile.PostedFile.ContentLength > limitSite)
            ...{                
                System.Web.HttpContext.Current.Response.Write("<script language=javascript>alert('上传文件限制最大为"+Convert.ToString(limitSite/1024)+"k');history.back(-1);</script>"); 
                System.Web.HttpContext.Current.Response.End();
                return false;
            }
            else
            ...{
                if(acc.Trim().Length > 0)
                ...{
                    
                    //将新文件名以GUID重命名                
                    accessory = System.Guid.NewGuid().ToString() +"."+ GetFileType(acc);

                    if(!System.IO.Directory.Exists(uploadDirectory))
                    ...{
                        System.IO.Directory.CreateDirectory(uploadDirectory);
                    }

                    string access= uploadDirectory + accessory;
            
                    try
                    ...{
                        inputFile.PostedFile.SaveAs(access);
                        fileName = accessory;
                        return true;
                    }
                    catch (Exception)
                    ...{
                        return false;
                    }
                }
            }
            return false;
        }

        /**//// <summary>
        /// 上传文件
        /// </summary>
        /// <param name="inputFile">html上传控件</param>
        /// <param name="uploadDirectory">上传到服务器目录</param>
        /// <param name="fileName">输出文件名</param>
        /// <param name="fileType">文件类型</param>
        /// <returns>返回操作逻辑值</returns>
        public static bool SaveFiles(HtmlInputFile inputFile, string uploadDirectory,string fileName,ref string fileType)
        ...{
            string upFile = inputFile.PostedFile.FileName;//文件及路径名
            
            if(upFile.Trim().Length > 0)
            ...{
                if(!System.IO.Directory.Exists(uploadDirectory))
                ...{
                    System.IO.Directory.CreateDirectory(uploadDirectory);
                }

                fileType = System.IO.Path.GetExtension(upFile);
                fileName = uploadDirectory + "/" + fileName + fileType;        
                try
                ...{
                    inputFile.PostedFile.SaveAs(fileName);
                    return true;
                }
                catch (Exception)
                ...{
                    return false;
                }
            }
            else
            ...{
                System.Web.HttpContext.Current.Response.Write("<script language=javascript>alert('请选择文件');history.back(-1);</script>"); 
                System.Web.HttpContext.Current.Response.End();
                return false;
            }                
        }


        /**//// <summary>
        /// 上传文件
        /// </summary>
        /// <param name="inputFile">html上传控件</param>
        /// <param name="uploadDirectory">上传到服务器目录</param>
        /// <param name="limitSite">上传文件大小限制(单位：字节)</param>
        /// <param name="fileName">输出文件名</param>
        /// <returns>返回操作逻辑值</returns>
        public static bool SaveAccessory(HtmlInputFile inputFile, string uploadDirectory, int limitSite,string fileName)
        ...{
            string acc = inputFile.PostedFile.FileName;//文件及路径名
            uploadDirectory = System.Web.HttpContext.Current.Server.MapPath("./") + uploadDirectory;

            if(inputFile.PostedFile.ContentLength > limitSite)
            ...{                
                System.Web.HttpContext.Current.Response.Write("<script language=javascript>alert('上传文件限制最大为"+Convert.ToString(limitSite/1024)+"k');history.back(-1);</script>"); 
                System.Web.HttpContext.Current.Response.End();
                return false;
            }
            else
            ...{
                if(acc.Trim().Length > 0)
                ...{
                    if(!System.IO.Directory.Exists(uploadDirectory))
                    ...{
                        System.IO.Directory.CreateDirectory(uploadDirectory);
                    }

                    fileName = uploadDirectory + fileName;
            
                    try
                    ...{
                        inputFile.PostedFile.SaveAs(fileName);
                        return true;
                    }
                    catch (Exception)
                    ...{

                        return false;
                    }
                }
            }
            return false;
        }

        #endregion

        /**//// <summary>
        /// 修改 Web.Config 中 appSettings 节点内节点信息
        /// </summary>
        /// <param name="nodeName">节点名</param>
        /// <param name="nodeKey">节点值</param>
        /// <returns>返回操作逻辑值</returns>
        public static bool SetWebConfigValue(string nodeName, string nodeKey)
        ...{
            string filename = System.Web.HttpContext.Current.Server.MapPath(System.Web.HttpContext.Current.Request.ApplicationPath + "/web.config");
            XmlDocument  xmldoc = new XmlDocument();
            xmldoc.Load(filename);
            System.Xml.XmlNode node = xmldoc.SelectSingleNode("configuration//appSettings");
            System.Xml.XmlNodeList nl = node.ChildNodes;
            foreach(XmlNode el in nl)
            ...{
                try
                ...{
                    if(el.Attributes["key"].Value == nodeName)
                    ...{
                        el.Attributes["value"].Value = nodeKey;
                    }
                } 
                catch
                ...{
                }
            }
            try
            ...{
                xmldoc.Save(filename);
                return true;
            }
            catch
            ...{
                return false;
            }
        }


        /**//// <summary>
        /// 从完整路径中提取文件名
        /// </summary>
        public static string GetFileName(string path)
        ...{
            return Path.GetFileName(path);
        }


        /**//// <summary>
        /// 新建文件
        /// </summary>
        public static void Create(string path)
        ...{
            try
            ...{
                // 如果以存在文件就删除
                if (File.Exists(path))
                ...{
                    File.Delete(path);
                }

                //创建文件
                using (FileStream fs = File.Create(path)) ...{ }
            }
            catch (Exception e)
            ...{
                throw e;
            }
        }

        /**//// <summary>
        /// 重命名文件
        /// </summary>
        public static bool ReName(string soucePath, string newPath)
        ...{
            try
            ...{
                File.Move(soucePath, newPath);
            }
            catch
            ...{
                return false;
            }

            return true;
        }


        /**//// <summary>
        /// 移动文件
        /// </summary>
        public static bool Move(string fromPath, string toPath)
        ...{
            return ReName(fromPath, toPath);
        }


        /**//// <summary>
        /// 删除文件
        /// </summary>
        public static bool Delete(string path)
        ...{
            try
            ...{
                File.Delete(path);
            }
            catch
            ...{
                return false;
            }

            return true;
        }


        /**//// <summary>
        /// 获取文件扩展名
        /// </summary>
        public static string GetFileType(string path)
        ...{
            string type = Path.GetExtension(path);
           /**//* if (string.IsNullOrEmpty(type))
            {
                return type;
            }
            */
            return type.Substring(1);
        }


        /**//// <summary>
        /// 返回不具有扩展名的指定路径字符串的文件名
        /// </summary>
        public static string GetFileNameWithoutExtension(string path)
        ...{
            return Path.GetFileNameWithoutExtension(path);
        }
        
        /**//// <summary>
        /// 判断目标文件夹是否存在
        /// </summary>
        /// <param name="path">文件夹路径 绝对路径  如： e:zykey</param>
        /// <returns></returns>
        public static bool ifdir(string path)
        ...{
            DirectoryInfo d=new DirectoryInfo(path);
            return d.Exists;
        }
    }
}