图片上传类

  调用：UpLoadIMG(this.FileName, "/upload/pic/", ".GIF.JPG.PNG.SWF");

public static string TransToTwo(string theStr)
        {
            if (theStr.Length == 1)
            {
                return "0"+theStr;
            }
            else
            {
                return theStr;
            }
        }
       
        public static string UpLoadIMG(FileUpload fulFile, string DirectionName,string ExtName)
        {
            try
            {
                //string FileName = fulFile.FileName;
                string returnStr = "";

                string FileSavePath = System.Web.HttpContext.Current.Server.MapPath("~/"); //获取文件存放的根路径

                if (fulFile.HasFile) //判断是否选择了要上传的文件
                {
                    string name = fulFile.PostedFile.FileName;

                    string DirectionName2 = DateTime.Now.Year.ToString() + TransToTwo(DateTime.Now.Month.ToString());

                    string DirectionName3 = TransToTwo(DateTime.Now.Day.ToString()) + TransToTwo(DateTime.Now.Hour.ToString()) + TransToTwo(DateTime.Now.Minute.ToString()) + TransToTwo(DateTime.Now.Second.ToString()) + DateTime.Now.Millisecond.ToString();

                    FileInfo file = new FileInfo(name);

                    string CreatePath="";
                    CreatePath =FileSavePath + DirectionName + DirectionName2 ;
                    FileSavePath += DirectionName + DirectionName2 +"/"+DirectionName3+ file.Extension;

                    if (ExtName.Contains( file.Extension.ToUpper() )) //符合类型
                    {
                        try
                        {
                            try
                            {
                                if (!Directory.Exists(CreatePath))
                                {
                                    Directory.CreateDirectory(CreatePath);
                                }
                            }
                            catch
                            {
                                throw;
                            }
                            fulFile.SaveAs(FileSavePath);
                        }
                        catch (Exception Error)
                        {
                            HttpContext.Current.Response.Write(" <script>alert('" + Error.Message + "') </script>");
                            return "";
                        }
                        returnStr = DirectionName2 + "/" + DirectionName3;
                  }
                    else
                    {
                        HttpContext.Current.Response.Write(" <script>alert('该文件格式不正确!') </script>");
                        return "";
                    }
                }
                else
                {
                    return "";
                }
            }
            catch
            {
                return "";
            }
        }