ASP.NET图像控件未显示最新上传的照片

本文介绍了ASP.NET图像控件未显示最新上传的照片的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

在Page_Load中，我将图像分配给:

Hi,

In Page_Load, I am assigning an image to:

<asp:image id="imgPhoto" runat="server" xmlns:asp="#unknown"></asp:image>

这是我的代码:

page_load
===========

Here is my code:

page_load
============

string photo = siteurl + DBUtilities.ExecuteScalar(DBConnections.GetSQLConnectionString(), CommandType.Text, "select photo from visitors_images where visitor_id='" + Request.QueryString["visitor_no"].ToString() + "'").ToString();
            if (IsExists(photo))
                imgPhoto.ImageUrl = photo;
            else
                imgPhoto.ImageUrl = "~/includes/images/no_person.jpg";

Submit_button
============

Submit_button
=============

fulPhoto.SaveAs(Server.MapPath("~/includes/visitors/" + IMGNAME));
DBUtilities.ExecuteNonQuery(DBConnections.GetSQLConnectionString(), CommandType.Text, "UPDATE visitors_images SET photo='" + IMGNAME + "' WHERE visitor_id='" + Request.QueryString["visitor_no"].ToString() + "'");
Response.Redirect(Request.RawUrl.ToString());

但是，如果我手动刷新，它将显示最新照片.能否请您提出一些建议.

谢谢！

But, if I refresh manually, it shows the latest photo. Can you please give some suggestion.

Thanks!

推荐答案

Random r = new Random();
        int RandomNumber = r.Next();

Response.Redirect(Request.RawUrl.ToString()+?r =" + RandomNumber.ToString();

Response.Redirect(Request.RawUrl.ToString()+"?r=" + RandomNumber.ToString();

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