string sourcePhotoPath = this.GetUserSelectedPhoto();

            if(sourcePhotoPath == null)

            {

                return;

            }

            string sourceFileName = System.IO.Path.GetFileName(sourcePhotoPath);

            //把图片保存到文件夹

            string userName = this.LoginUserName;

            string newPath = @"Images";

            if(!System.IO.Directory.Exists(newPath))

            {

                System.IO.Directory.CreateDirectory(newPath);

            }

            string destFile = userName + DateTime.Now.ToString("yyyyMMddHHMMss") + "_" + sourceFileName;

            string destImgPath = System.IO.Path.Combine(newPath, destFile);

            if(!File.Exists(destImgPath))

            {

                var myFile = File.Create(destImgPath);

                myFile.Close();

            }

            FileInfo f1 = new FileInfo(sourcePhotoPath);

            f1.CopyTo(destImgPath,true);