<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title></title>
<style type="text/css">
#tab1 {
width: 100%;
text-align: center;
background-color: navy;
border-spacing: 1px; /*边框之间的空隙变成1像素*/
}
#tab1 thead tr {
color: white;
}
#tab1 tbody tr {
background-color: white;
}
#tab1 td {
padding: 7px 5px;
}
#tab1 tbody tr:hover {
background-color: #f00; /*//鼠标移入时候的背景颜色*/
}
#Button1
{
margin-right:0px;
margin-top:0px;
}
#TextBox1
{
width:50px;
}
</style>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
<asp:Button ID="Button1" runat="server" Text="退出" Height="21px" style="margin-left: 1141px" Width="73px" />
<br />
<br />
昵称：<asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>
性别：<asp:DropDownList ID="DropDownList1" runat="server">
<asp:ListItem Value="true">全部</asp:ListItem>
<asp:ListItem value="1">男</asp:ListItem>
<asp:ListItem Value="0">女</asp:ListItem>
</asp:DropDownList>
生日：<asp:DropDownList ID="DropDownList2" runat="server">
<asp:ListItem Value=">=">大于等于</asp:ListItem>
<asp:ListItem Value="<=">小于等于</asp:ListItem>
</asp:DropDownList>
<asp:TextBox ID="TextBox3" runat="server"></asp:TextBox>
<asp:Button ID="Button3" runat="server" Text="查询" />
<asp:Label ID="ceshi" runat="server" Text="Label"></asp:Label>
<br />
<br />
<table id="tab1">
<thead>
<tr>
<td>ID</td>
<td>编号</td>
<td>用户名</td>
<td>密码</td>
<td>昵称</td>
<td>性别</td>
<td>生日</td>
<td>民族</td>
<td>操作</td>
</tr>
</thead>
<tbody>
<asp:Repeater ID="Repeater1" runat="server">
<%-- 在内容里加Repeater和TtemTemplate--%>
<ItemTemplate>
<tr>
<td><%#Eval("ID") %></td>
<td><%#Eval("ucode") %></td>
<td><%#Eval("username") %></td>
<td><%#Eval("password") %></td>
<td><%#Eval("nickname") %></td>
<td><%#Eval("sexstr") %>
<%-- <img src="<%#Eval("sexImg") %>" />--%> <%--使用图片当性别区分--%>
</td>
<td><%#Eval("birthday","{0:yyyy年MM月dd日}") %></td>
<%-- 日期的转换--%>
<td><%#Eval("NationName") %></td>
<td>
<a href="update2.aspx?ID=<%#Eval("ID") %>">修改</a> <%--添加两个操作,里面的两个ID不要写错了--%>
<a href="delete2.aspx?ID=<%#Eval("ID") %>" onclick="return confirm(‘确定要删除吗？‘);">删除</a>
</td>
</tr>
</ItemTemplate>
</asp:Repeater>
</tbody>
</table>
<a href="insertu.aspx ">添加</a>
<%--<a href="updateu.aspx ">修改</a>--%>
</div>
<div style="width: 100%; text-align: center; line-height: 30px;">
当前第[
<asp:Label ID="lab_NowPageNumber" runat="server" Text="1"></asp:Label>
]页
共[
<asp:Label ID="lab_MaxPageNumber" runat="server" Text="1"></asp:Label>
]页<br />
<asp:Button ID="btn_First" runat="server" Text="首页" />
<asp:Button ID="btn_Prev" runat="server" Text="上一页" />
<asp:Button ID="btn_Next" runat="server" Text="下一页" />
<asp:Button ID="btn_Last" runat="server" Text="尾页" /><br />
<%-- <asp:DropDownList ID="dr_drop" AutoPostBack="true" runat="server"></asp:DropDownList>--%>
<asp:TextBox ID="TextBox1" runat="server" ></asp:TextBox>
<asp:Button ID="Button2" runat="server" Text="跳转" />
</div>
</form>
</body>
</html>
<%--表单：
文本：
<input type ="text" name="" id="" value=""/> 文本框
<input type="password" name="" id="" value="" /> 密码框
<input type="hidden" name="" id="" value =""/> 隐藏域
<textarea name="" id="" cols=""(字符多少) rows=""(几行高)></textarea> 一般都是写评论的那种
按钮：
<input type="submit" name="" id="" value=""/> 提交按钮
<input type="reset" name="" id="" value=""/> 重置按钮
<input type="button" name="" id="" value=""/> 普通按钮
<input type="image" name="" id="" value="" src="图片地址"/>
选择：
<input type="radio" name=""value=""/> 单选按钮
<input type="checkbox" name="" value=""/> 复选框组
<input type="file" name="" id=""/> 文件上传
<select name="" id="" size="" multiple="multiple"(多选)>
<option value="值" selected="selected"(设为默认)>内容1</option>
<option value="值">内容2</option>
<option value="值">内容3</option>
<option value="值">内容4</option>
</select>--%>
后台代码：
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class _Default : System.Web.UI.Page
{
int pagecount = 5;
protected void Page_Load(object sender, EventArgs e)
{
Button1.Click += Button1_Click; //退出登录
Button2.Click += Button2_Click; //分页跳转
Button3.Click += Button3_Click; //组合查询按钮
btn_Last.Click += btn_Last_Click; //尾页
btn_Next.Click += btn_Next_Click; //下一页
btn_Prev.Click += btn_Prev_Click; //上一页
btn_First.Click += btn_First_Click; //首页
TextBox1.TextChanged += TextBox1_TextChanged;
if (Session["user"] != null)
{
Label1.Text = (Session["user"] as Users).nickname + "，欢迎您！";//接受传过来的值 Session["hehe"] as Users变成对象,可以取里面的内容。
}
if (!IsPostBack)
{
Repeater1.DataSource = new UsersData().Selectsql("select top " + pagecount + " * from Users", new Hashtable());
Repeater1.DataBind();
lab_MaxPageNumber.Text = getMaxNumber().ToString();
btn_First.Enabled = false;
btn_Prev.Enabled = false;
Button2.Enabled = false;
}
}
void TextBox1_TextChanged(object sender, EventArgs e)
{
Button2.Enabled = true;
}
void btn_First_Click(object sender, EventArgs e) //首页
{
int skip = 1;
string tsql2 = @"select top " + pagecount + " * from Users";
string tsql3 = "";
int cou = 0;
lab_NowPageNumber.Text = skip.ToString();
if (TextBox2.Text.Trim().Length > 0)
{
tsql3 += " where nickname like ‘%" + TextBox2.Text.Trim() + "%‘";
cou++;
}
if (DropDownList1.SelectedIndex != 0)
{
if (cou > 0)
tsql3 += " and";
else
tsql3 += " where";
tsql3 += " sex= " + DropDownList1.SelectedValue + "";
cou++;
}
if (TextBox3.Text.Trim().Length > 0)
{
if (cou > 0)
tsql3 += " and";
else
tsql3 += " where";
tsql3 += " birthday " + DropDownList2.SelectedValue + " " + TextBox3.Text.Trim();
cou++;
}
string fy = "ID not in (select top " + ((skip - 1) * pagecount) + " ID from Users " + tsql3 + ")";
string endsql = tsql2 + tsql3 + ((cou > 0) ? " and " : " where ") + fy;
lab_NowPageNumber.Text = skip.ToString();
Repeater1.DataSource = new UsersData().Selectsql(endsql, new Hashtable());
Repeater1.DataBind();
btn_First.Enabled = false;
btn_Prev.Enabled = false;
btn_Next.Enabled = true;
btn_Last.Enabled = true;
}
void btn_Prev_Click(object sender, EventArgs e) //上一页
{
btn_Next.Enabled = true;
btn_Last.Enabled = true;
//上一页
int skip = Convert.ToInt32(lab_NowPageNumber.Text) - 1;
string tsql2 = @"select top " + pagecount + " * from Users";
string tsql3 = "";
int cou = 0;
if (TextBox2.Text.Trim().Length > 0)
{
tsql3 += " where nickname like ‘%" + TextBox2.Text.Trim() + "%‘";
cou++;
}
if (DropDownList1.SelectedIndex != 0)
{
if (cou > 0)
tsql3 += " and";
else
tsql3 += " where";
tsql3 += " sex= " + DropDownList1.SelectedValue + "";
cou++;
}
if (TextBox3.Text.Trim().Length > 0)
{
if (cou > 0)
tsql3 += " and";
else
tsql3 += " where";
tsql3 += " birthday " + DropDownList2.SelectedValue + " " + TextBox3.Text.Trim();
cou++;
}
string fy = "ID not in (select top " + ((skip - 1) * pagecount) + " ID from Users " + tsql3 + ")";
string endsql = tsql2 + tsql3 + ((cou > 0) ? " and " : " where ") + fy;
ceshi.Text = endsql;
lab_NowPageNumber.Text = skip.ToString();
Repeater1.DataSource = new UsersData().Selectsql(endsql, new Hashtable());
Repeater1.DataBind();
string ss = "select * from Users";
string aa = Convert.ToInt32(Math.Ceiling(((decimal)new UsersData().Selectsql(ss, new Hashtable()).Count) / pagecount)).ToString(); //总页数
if (lab_NowPageNumber.Text == "1")
{
btn_Prev.Enabled = false;
btn_First.Enabled = false;
}
}
void btn_Next_Click(object sender, EventArgs e) //下一页
{
//下一页
btn_First.Enabled = true;
btn_Prev.Enabled = true;
int skip = Convert.ToInt32(lab_NowPageNumber.Text) + 1; //这里是为了给下面提供应该查询前几页的数据提供的。
string tsql2 = @"select top " + pagecount + " * from Users";
string tsql3 = "";
int cou = 0;
lab_NowPageNumber.Text = skip.ToString();
if (TextBox2.Text.Trim().Length > 0)
{
tsql3 += " where nickname like ‘%" + TextBox2.Text.Trim() + "%‘";
cou++;
}
if (DropDownList1.SelectedIndex != 0)
{
if (cou > 0)
tsql3 += " and";
else
tsql3 += " where";
tsql3 += " sex= " + DropDownList1.SelectedValue + "";
cou++;
}
if (TextBox3.Text.Trim().Length > 0)
{
if (cou > 0)
tsql3 += " and";
else
tsql3 += " where";
tsql3 += " birthday " + DropDownList2.SelectedValue + " " + TextBox3.Text.Trim();
cou++;
}
string fy = "ID not in (select top " + ((skip - 1) * pagecount) + " ID from Users " + tsql3 + ")";
string endsql = tsql2 + tsql3 + ((cou > 0) ? " and " : " where ") + fy;
lab_NowPageNumber.Text = skip.ToString();
Repeater1.DataSource = new UsersData().Selectsql(endsql, new Hashtable());
Repeater1.DataBind();
if (lab_NowPageNumber.Text == lab_MaxPageNumber.Text)
{
btn_Next.Enabled = false;
btn_Last.Enabled = false;
}
}
void btn_Last_Click(object sender, EventArgs e) //尾页
{
btn_First.Enabled = true;
btn_Prev.Enabled = true;
btn_Next.Enabled = false;
btn_Last.Enabled = false;
int skip = Convert.ToInt32(lab_MaxPageNumber.Text);
string tsql2 = @"select top " + pagecount + " * from Users";
string tsql3 = "";
int cou = 0;
lab_NowPageNumber.Text = skip.ToString();
if (TextBox2.Text.Trim().Length > 0)
{
tsql3 += " where nickname like ‘%" + TextBox2.Text.Trim() + "%‘";
cou++;
}
if (DropDownList1.SelectedIndex != 0)
{
if (cou > 0)
tsql3 += " and";
else
tsql3 += " where";
tsql3 += " sex= " + DropDownList1.SelectedValue + "";
cou++;
}
if (TextBox3.Text.Trim().Length > 0)
{
if (cou > 0)
tsql3 += " and";
else
tsql3 += " where";
tsql3 += " birthday " + DropDownList2.SelectedValue + " " + TextBox3.Text.Trim();
cou++;
}
string fy = "ID not in (select top " + ((skip - 1) * pagecount) + " ID from Users " + tsql3 + ")";
string endsql = tsql2 + tsql3 + ((cou > 0) ? " and " : " where ") + fy;
lab_NowPageNumber.Text = skip.ToString();
Repeater1.DataSource = new UsersData().Selectsql(endsql, new Hashtable());
Repeater1.DataBind();
}
void Button3_Click(object sender, EventArgs e) //组合查询按钮
{
int cou = 0;
string tsql = "select top " + pagecount + " *from Users";
string tsql2 = "select * from Users";
string tsql3 = "";
//查询按钮
if (TextBox2.Text.Trim().Length > 0)
{
tsql3 += " where nickname like ‘%" + TextBox2.Text.Trim() + "%‘";
cou++;
}
if (DropDownList1.SelectedIndex != 0)
{
if (cou > 0)
tsql3 += " and";
else
tsql3 += " where";
tsql3 += " sex= " + DropDownList1.SelectedValue + "";
cou++;
}
if (TextBox3.Text.Trim().Length > 0)
{
if (cou > 0)
tsql3 += " and";
else
tsql3 += " where";
tsql3 += " birthday " + DropDownList2.SelectedValue + "" + TextBox3.Text.Trim();
cou++;
}
lab_NowPageNumber.Text = "1";
ceshi.Text = tsql2 + tsql3;
Repeater1.DataSource = new UsersData().Selectsql(tsql + tsql3, new Hashtable());
Repeater1.DataBind();
lab_MaxPageNumber.Text = Convert.ToInt32(Math.Ceiling(((decimal)new UsersData().Selectsql(tsql2 + tsql3, new Hashtable()).Count) / pagecount)).ToString(); //总页数
}
void Button2_Click(object sender, EventArgs e) //分页跳转
{
btn_First.Enabled = true;
btn_Prev.Enabled = true;
int skip = Convert.ToInt32(TextBox1.Text);
if (skip <= Convert.ToInt32(lab_MaxPageNumber.Text) && skip > 0)
{
string tsql2 = @"select top " + pagecount + " * from Users";
string tsql3 = "";
int cou = 0;
lab_NowPageNumber.Text = skip.ToString();
if (TextBox2.Text.Trim().Length > 0)
{
tsql3 += " where nickname like ‘%" + TextBox2.Text.Trim() + "%‘";
cou++;
}
if (DropDownList1.SelectedIndex != 0)
{
if (cou > 0)
tsql3 += " and";
else
tsql3 += " where";
tsql3 += " sex= " + DropDownList1.SelectedValue + "";
cou++;
}
if (TextBox3.Text.Trim().Length > 0)
{
if (cou > 0)
tsql3 += " and";
else
tsql3 += " where";
tsql3 += " birthday " + DropDownList2.SelectedValue + " " + TextBox3.Text.Trim();
cou++;
}
string fy = "ID not in (select top " + ((skip - 1) * pagecount) + " ID from Users " + tsql3 + ")";
string endsql = tsql2 + tsql3 + ((cou > 0) ? " and " : " where ") + fy;
lab_NowPageNumber.Text = skip.ToString();
Repeater1.DataSource = new UsersData().Selectsql(endsql, new Hashtable());
Repeater1.DataBind();
TextBox1.Text = "";
}
else
{ }
}
void Button1_Click(object sender, EventArgs e) //退出登录
{
Response.Cookies["user"].Expires = DateTime.Now.AddDays(-10);
Response.Redirect("Login.aspx"); //跳转页面，到登录页面
}
public int getMaxNumber() //最大的页数
{
int end = 1;
string sql = "select * from Users";
Hashtable hs = new Hashtable();
//（数据总条数/每页显示条数）取上限 就会显示最大页数
int allCount = new UsersData().Selectsql(sql, hs).Count; //查询全部数据条数 allCount
decimal a = Convert.ToDecimal(allCount) / pagecount; //页数
end = Convert.ToInt32(Math.Ceiling(a)); //取上限
return end;
}
}
组合查询和分页合在一起，关键是弄明白查询语句应该怎写。
时间： 2024-10-24 19:01:07