asp.net updatePanel实现无刷新应用实例

vs.net 无刷新

代码如下

复制代码

<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<h2>
使用VS控件updatePanel实现无刷新
</h2>
<p>
<asp:UpdatePanel ID="UpdatePanel1" RenderMode="Block" UpdateMode="Conditional" runat="server">
<ContentTemplate>
点击按钮从服务器获取当前时间<asp:TextBox ID="txtTime" runat="server"></asp:TextBox>
<asp:Button ID="btn1" runat="server" Text="Button" onclick="btn1_Click" />
</ContentTemplate>
<Triggers>
<%--<asp:PostBackTrigger ControlID="btn1" />--%>
<asp:AsyncPostBackTrigger ControlID="btn1"/>
</Triggers>
</asp:UpdatePanel>
</p>

后台代码

代码如下	复制代码
protected void btn1_Click(object sender, EventArgs e) { txtTime.Text = DateTime.Now.ToString(); }

无刷新上传图片

代码如下

复制代码

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" />
<asp:FileUpload ID="File1" runat="server" Width="200px" />
</ContentTemplate>
<Triggers>
<asp:PostBackTrigger ControlID="Button1" />
</Triggers>
</asp:UpdatePanel>
<asp:Image id="image1" ImageUrl="nopic.gif" Height="115px" Width="108px" runat="server"/>
</div>
</form>
</body>
</html>

后台代码

代码如下

复制代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.IO;
using System.Data.SqlClient;
using System.Data;
public partial class _Default:baseClass
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
HttpPostedFile upFile = File1.PostedFile;
int iFileLength = upFile.ContentLength;
try
{
if (iFileLength == 0)
{
MessageBox("请选择要上传的文件！");
}
else
{
Byte[] FileByteArray = new Byte[iFileLength];
Stream StreamObject = upFile.InputStream;
StreamObject.Read(FileByteArray, 0, iFileLength);
SqlConnection conn = new SqlConnection("server=.;database=Test;uid=sa;pwd=1234;");
ExecuteBySQLNonQuery("delete from imageTable");
SqlCommand cmd = new SqlCommand("insert into [imageTable] values(@image)", conn);
cmd.Parameters.Add("@Image", SqlDbType.Binary, iFileLength).Value = FileByteArray;
conn.Open();
cmd.ExecuteNonQuery();
conn.Close();
MessageBox("已经成功上传了照片!");
}
image1.ImageUrl = "displayempphoto.ashx";
}
catch (Exception ex)
{
MessageBox(ex.Message);
}
}
}

时间： 2025-01-24 18:38:10

asp.net updatePanel实现无刷新应用实例

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