C#上傳圖片返回要保存的圖片名

    /// <summary>
    /// 刪除文件
    /// </summary>
    /// <param name="saveFilePath">文件保存路徑</param>
    /// <param name="imgPath">文件名</param>
    public static void Delfile(string saveFilePath, string imgPath) 
    {
        //刪除原有圖片
        string pathname = System.Web.HttpContext.Current.Server.MapPath(saveFilePath) + "/" + imgPath;
        string fname = pathname.Substring(pathname.LastIndexOf("\\") + 1);
        if (File.Exists(pathname))
        {
            try
            {
                File.Delete(pathname);
            }
            catch (Exception error)
            {
                buss.ShowMsgBox("刪除原有圖片出錯! 錯誤:" + error.Message);               
            }
        }
    }





    /// <summary>
    /// 上傳圖片,返回要保存的圖片名
    /// </summary>
    /// <param name="fulPhoto">上傳控件名稱</param>
    /// <param name="fileName">保存文件的文件夾路徑</param>
    /// <param name="imgPath">要判斷是否存在的圖片名</param>
    /// <returns>返回保存的圖片名</returns>
    public static string Upimgfile(FileUpload fulPhoto, string saveFilePath, string imgPath)
    {
        if (fulPhoto.HasFile)
        {
            try
            {
                //刪除原有的
                if (imgPath != "")
                {
                    //刪除原有圖片
                    string pathname = System.Web.HttpContext.Current.Server.MapPath(saveFilePath) + "/" + imgPath;
                    string fname = pathname.Substring(pathname.LastIndexOf("\\") + 1);
                    if (File.Exists(pathname))
                    {
                        try
                        {
                            File.Delete(pathname);
                        }
                        catch (Exception error)
                        {
                            buss.ShowMsgBox("刪除原有圖片出錯! 錯誤:" + error.Message);
                            return "";
                        }
                    }
                }


                //如果有文件
                string fileName = fulPhoto.FileName;
                string savePath = System.Web.HttpContext.Current.Server.MapPath(saveFilePath);
                string imgType = fileName.Substring(fileName.LastIndexOf(".") + 1);

                //命名圖片
                string imgName = System.DateTime.Now.ToString("yyyyMMddhhmmss") + fileName;
                //圖片保存路徑
                string fullpath = savePath + "\\" + imgName;
                //保存圖片
                fulPhoto.SaveAs(fullpath);
                imgPath = imgName;
            }
            catch (Exception ex)
            {
                buss.ShowMsgBox("圖片上傳出錯!錯誤:" + ex.Message);
                return "";
            }
        }

        return imgPath;
    }


    /// <summary>
    /// 上傳圖片,返回要保存的圖片名
    /// </summary>
    /// <param name="fulPhoto">上傳控件名稱</param>
    /// <param name="fileName">保存文件的文件夾路徑</param>
    /// <param name="imgPath">要判斷是否存在的圖片名</param>
    /// <returns>返回保存的圖片名</returns>
    public static string Upimgfile(FileUpload fulPhoto, string saveFilePath, string imgPath,string aa)
    {
        if (fulPhoto.HasFile)
        {
            try
            {
                //刪除原有的
                if (imgPath != "")
                {
                    //刪除原有圖片
                    string pathname = System.Web.HttpContext.Current.Server.MapPath(saveFilePath) + "/" + imgPath;
                    string fname = pathname.Substring(pathname.LastIndexOf("\\") + 1);
                    if (File.Exists(pathname))
                    {
                        try
                        {
                            File.Delete(pathname);
                        }
                        catch (Exception error)
                        {
                            buss.ShowMsgBox("刪除原有圖片出錯! 錯誤:" + error.Message);
                            return "";
                        }
                    }
                }


                //如果有文件
                string fileName = fulPhoto.FileName;
                string savePath = System.Web.HttpContext.Current.Server.MapPath(saveFilePath);
                string imgType = fileName.Substring(fileName.LastIndexOf(".") + 1);

                //命名圖片
                string imgName = System.DateTime.Now.ToString("yyyyMMddhhmmss") + aa + fileName;
                //圖片保存路徑
                string fullpath = savePath + "\\" + imgName;
                //保存圖片
                fulPhoto.SaveAs(fullpath);
                imgPath = imgName;
            }
            catch (Exception ex)
            {
                buss.ShowMsgBox("圖片上傳出錯!錯誤:" + ex.Message);
                return "";
            }
        }

        return imgPath;
    }


 /// <summary>
    /// 上傳圖片,返回要保存的圖片名
    /// </summary>
    /// <param name="fulPhoto">上傳控件名稱</param>
    /// <param name="fileName">保存文件的文件夾路徑</param>
    /// <param name="imgPath">要判斷是否存在的圖片名</param>
    /// <returns>返回保存的圖片名</returns>
    public static string Upimgfile2(FileUpload fulPhoto, string saveFilePath, string imgPath,string numb)
    {
       if (fulPhoto.HasFile)
        {
            try
            {
                //刪除原有的
                if (imgPath != "")
                {
                    //刪除原有圖片
                    string pathname = System.Web.HttpContext.Current.Server.MapPath(saveFilePath) + "/" + imgPath;
                    string fname = pathname.Substring(pathname.LastIndexOf("\\") + 1);
                    if (File.Exists(pathname))
                    {
                        try
                        {
                            File.Delete(pathname);
                        }
                        catch (Exception error)
                        {
                            buss.ShowMsgBox("刪除原有圖片出錯! 錯誤:" + error.Message);
                            return "";
                        }
                    }
                }


                //如果有文件
                string fileName = fulPhoto.FileName;
                string savePath = System.Web.HttpContext.Current.Server.MapPath(saveFilePath);
                string imgType = fileName.Substring(fileName.LastIndexOf(".") + 1);
                
                //命名圖片
                string imgName = System.DateTime.Now.ToString("yyyyMMddhhmmss")+ numb + fileName;
                //圖片保存路徑
                string fullpath = savePath + "\\" + imgName;
                //保存圖片
                fulPhoto.SaveAs(fullpath);
                imgPath = imgName;
            }
            catch (Exception ex)
            {
                buss.ShowMsgBox("圖片上傳出錯!錯誤:" + ex.Message);
                return "";
            }
        }

        return imgPath;
    }