请看我的源码：

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        string TP_name = FileUpload1.FileName;
        string TP_size = FileUpload1.PostedFile.ContentLength.ToString();
        string TP_type = TP_name.Substring(TP_name.LastIndexOf(".") + 1);
       string TP_path = Server.MapPath("upimg") + "\\" + TP_name;
        string TP_path1 = "upimg\\" + TP_name;

        if (TP_type == "jpg" || TP_type == "gif")
        {
            if (Convert.ToInt32(TP_size) <= 300000)
            {


                Image1.Visible = true;
                FileUpload1.SaveAs(TP_path);
                Image1.ImageUrl = TP_path1;
                TextBox1.Text = "upimg\\" + TP_name;
                Response.Write("<script> alert('图片添加成功！') </script>");
            }


            else
            {

                Response.Write("<script> alert('图片不能超过000KB，请重新添加') </script>");


            }
        }
        else
        {

            Response.Write("<script> alert('图片类型不对，请重新添加') </script>");


        }

    }
}


我上传的图片是原图片名字 我想实现 上传的时候是根据系统时间来命名的 而且不能重名  真的不会写了 请大家帮我一下： 我知道这是System.DateTime.Now.ToShortDateString 获取时间 但是不会写了

FileUpload1.SaveAs(Server.MapPath("upimg/") +GetStr() + (FileUpload1.FileName).ToLower());

public string GetStr()
         {
             Random random = new Random();
             string text = DateTime.Now.Year.ToString();
             string text2 = addZero(DateTime.Now.Month.ToString());
             string text3 = addZero(DateTime.Now.Day.ToString());
             string text4 = addZero(DateTime.Now.Hour.ToString());
             string text5 = addZero(DateTime.Now.Minute.ToString());
             string text6 = addZero(DateTime.Now.Second.ToString());
             return text + text2 + text3 + text4 + text5 + text6 + random.Next(10, 0x63).ToString();

            
         }
         protected static string addZero(string str)
         {
             if (str.Length == 1)
             {
                 str = "0" + str;
             }
             return str;
         }

好像一条“\”就够了吧