上传文件类

我们经常要做文件上传，而在每个页中写文件上传，会给后期维护带来很大困难，所以我们要做一个公共的类，方便我们的维护。类如下：

using System;
using System.IO;
using System.Web;
using System.Web.UI.HtmlControls;

namespace Common
{
    public class Upfile
    {
        private string fileType = null;
        private string fName = null;
        private string path = null;
        private int sizes = 0;

        public Upfile()
        {
            this.path = @"\UpLoadImages\";
            this.fileType = "jpg|gif|bmp";
            this.sizes = 3136630;
        }

        public  string fileSaveAs(System.Web.UI.WebControls.FileUpload name, bool creatDirectory)
        {
            try
            {
                string tFileType;
                bool flag;
                string filePath = null;
                string modifyFileName = DateTime.Now.Year.ToString() + DateTime.Now.Month.ToString() + DateTime.Now.Day.ToString() + DateTime.Now.Hour.ToString() + DateTime.Now.Minute.ToString() + DateTime.Now.Second.ToString() + DateTime.Now.Millisecond.ToString();
                string uploadFilePath = null;
                if (creatDirectory)
                {
                    uploadFilePath = HttpContext.Current.Server.MapPath("~") + this.path + DateTime.Now.Year.ToString() +"-"+ DateTime.Now.Month.ToString() +"-"+ DateTime.Now.Day.ToString() + @"\";
                }
                else
                {
                    uploadFilePath = HttpContext.Current.Server.MapPath("~") + this.path;
                }
                string sourcePath = name.PostedFile.FileName;
                switch (sourcePath)
                {
                    case "":
                    case null:
                        return null;

                    default:
                        {
                            tFileType = sourcePath.Substring(sourcePath.LastIndexOf(".") + 1).ToLower();
                            long strLen = name.PostedFile.ContentLength;
                            string[] temp = this.fileType.Split(new char[] { '|' });
                            flag = false;
                            if (strLen >= this.sizes)
                            {
                                JScript.MsgBox("上传的档案不能大于" + this.sizes + "KB");
                                return null;
                            }
                            foreach (string data in temp)
                            {
                                if (data == tFileType)
                                {
                                    flag = true;
                                    break;
                                }
                            }
                            break;
                        }
                }
                if (!flag)
                {
                    JScript.MsgBox("目前本系统支持的格式为:" + this.fileType);
                    //this.message("目前本系统支持的格式为:" + this.fileType);
                    return null;
                }
                DirectoryInfo dir = new DirectoryInfo(uploadFilePath);
                if (!dir.Exists)
                {
                    dir.Create();
                }
                filePath = uploadFilePath + modifyFileName + "." + tFileType;
                name.SaveAs(filePath);
                if (creatDirectory)
                {
                    filePath = this.path + DateTime.Now.Year.ToString() + DateTime.Now.Month.ToString() + DateTime.Now.Day.ToString() + @"\" + modifyFileName + "." + tFileType;
                }
                else
                {
                    filePath = this.path + modifyFileName + "." + tFileType;
                }
                this.fName = modifyFileName + "." + tFileType;
                return filePath;
            }
            catch
            {
               // this.message("");
                //JScript.
                JScript.MsgBox("出现错误，请检查图片格式！");
                return null;
            }
        }

        public string fileSaveAs(HtmlInputFile name, bool creatDirectory)
        {
            try
            {
                string tFileType;
                bool flag;
                string filePath = null;
                string modifyFileName = DateTime.Now.Year.ToString() + DateTime.Now.Month.ToString() + DateTime.Now.Day.ToString() + DateTime.Now.Hour.ToString() + DateTime.Now.Minute.ToString() + DateTime.Now.Second.ToString() + DateTime.Now.Millisecond.ToString();
                string uploadFilePath = null;
                if (creatDirectory)
                {
                    uploadFilePath = HttpContext.Current.Server.MapPath("~") + this.path + DateTime.Now.Year.ToString() + DateTime.Now.Month.ToString() + DateTime.Now.Day.ToString() + @"\";
                }
                else
                {
                    uploadFilePath = HttpContext.Current.Server.MapPath("~") + this.path;
                }
                string sourcePath = name.Value.Trim();
                switch (sourcePath)
                {
                    case "":
                    case null:
                        this.message("请选择你要上传的图片!");
                        return null;

                    default:
                        {
                            tFileType = sourcePath.Substring(sourcePath.LastIndexOf(".") + 1).ToLower();
                            long strLen = name.PostedFile.ContentLength;
                            string[] temp = this.fileType.Split(new char[] { '|' });
                            flag = false;
                            if (strLen >= this.sizes)
                            {
                                this.message("上传的档案不能大于" + this.sizes + "KB");
                                return null;
                            }
                            foreach (string data in temp)
                            {
                                if (data == tFileType)
                                {
                                    flag = true;
                                    break;
                                }
                            }
                            break;
                        }
                }
                if (!flag)
                {
                    this.message("目前本系统支持的格式为:" + this.fileType);
                    return "";
                }
                DirectoryInfo dir = new DirectoryInfo(uploadFilePath);
                if (!dir.Exists)
                {
                    dir.Create();
                }
                filePath = uploadFilePath + modifyFileName + "." + tFileType;
                name.PostedFile.SaveAs(filePath);
                if (creatDirectory)
                {
                    filePath = this.path + DateTime.Now.Year.ToString() + DateTime.Now.Month.ToString() + DateTime.Now.Day.ToString() + @"\" + modifyFileName + "." + tFileType;
                }
                else
                {
                    filePath = this.path + modifyFileName + "." + tFileType;
                }
                this.fName = modifyFileName + "." + tFileType;
                return filePath;
            }
            catch
            {
                this.message("出现错误，请检查图片格式！");
                return null;
            }
        }

        private void message(string msg)
        {
            HttpContext.Current.Response.Write("<script language=javascript>alert('" + msg + "');</script>");
        }

        private void message(string msg, string url)
        {
            HttpContext.Current.Response.Write("<script language=javascript>alert('" + msg + "');window.location='" + url + "'</script>");
        }

        public string FileType
        {
            set
            {
                this.fileType = value;
            }
        }

        public string FName
        {
            get
            {
                return this.fName;
            }
            set
            {
                this.fName = value;
            }
        }

        public string Path
        {
            set
            {
                this.path = @"\" + value + @"\";
            }
        }

        public int Sizes
        {
            set
            {
                this.sizes = value * 0x400;
            }
        }
    }