2017-5-25 分页加条件查询合体
Posted Zoe
tags:
篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了2017-5-25 分页加条件查询合体相关的知识，希望对你有一定的参考价值。
<%@ 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> </head> <body> <form id="form1" runat="server"> <br /> 姓名：<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox> 编号：<asp:DropDownList ID="DropDownList2" runat="server"> <asp:ListItem Text="大于" Value=">"></asp:ListItem> <asp:ListItem Text="小于" Value="<"></asp:ListItem> </asp:DropDownList> <asp:TextBox ID="TextBox2" runat="server"></asp:TextBox> 民族：<asp:DropDownList ID="DropDownList3" runat="server"> <asp:ListItem Text="n001" Value="n001"></asp:ListItem> <asp:ListItem Text="n002" Value="n002"></asp:ListItem> <asp:ListItem Text="n003" Value="n003"></asp:ListItem> <asp:ListItem Text="n004" Value="n004"></asp:ListItem> <asp:ListItem Text="任意" Value="null"></asp:ListItem> </asp:DropDownList> <asp:Button ID="Button1" runat="server" Text="查询" /><br /> <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label> <br /><br /> <table style="width:100%;text-align:center;background-color:navy;"> <tr style="color:white;"> <td>ids</td> <td>姓名</td> <td>密码</td> <td>昵称</td> <td>性别</td> <td>生日</td> <td>民族</td> </tr> <asp:Repeater ID="Repeater1" runat="server"> <ItemTemplate> <tr style="background-color:white;"> <td><%#Eval("ids")%></td> <td><%#Eval("username")%></td> <td><%#Eval("password") %></td> <td><%#Eval("nickname") %></td> <td><%#Eval("sex") %></td> <td><%#Eval("birthday") %></td> <td><%#Eval("nation") %></td> </tr> </ItemTemplate> </asp:Repeater> </table> 当前第[<asp:Literal ID="lit_nownumber" runat="server" Text="1"></asp:Literal>]页 共[<asp:Literal ID="lit_maxnumber" runat="server" Text="1"></asp:Literal>]页 <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" /> <asp:DropDownList ID="DropDownList1" AutoPostBack="true" runat="server"></asp:DropDownList> <asp:Button ID="btn_jump" runat="server" Text="跳转" /> <asp:Label ID="Label2" runat="server" Text="Label"></asp:Label> </form> </body> </html>
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 = 2;//每页显示条数 int pagenumber = 1; protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { Repeater1.DataSource = new user1data().select(pagecount, 1); Repeater1.DataBind(); lit_maxnumber.Text = maxpagenumber().ToString(); for (int i = 1; i <= maxpagenumber(); i++) { ListItem li = new ListItem(i.ToString(), i.ToString()); DropDownList1.Items.Add(li); } } btn_last.Click += btn_last_Click; btn_next.Click += btn_next_Click; btn_prev.Click += btn_prev_Click; btn_first.Click += btn_first_Click; btn_jump.Click += btn_jump_Click; DropDownList1.SelectedIndexChanged += btn_jump_Click; Button1.Click += Button1_Click; } void Button1_Click(object sender, EventArgs e) { Repeater1.DataSource = enddata(1); Repeater1.DataBind(); lit_nownumber.Text = "1"; //最大页数改变 lit_maxnumber.Text = maxpagenumber2().ToString(); } void btn_jump_Click(object sender, EventArgs e) { int a = Convert.ToInt32(DropDownList1.SelectedValue); //将下一页数据绑定到页面中去。 Repeater1.DataSource = new user1data().select(pagecount, a); Repeater1.DataBind(); //将当前显示的页数改变到页面中去 lit_nownumber.Text = a.ToString(); } void btn_first_Click(object sender, EventArgs e) { //将下一页数据绑定到页面中去。 Repeater1.DataSource = enddata(1); Repeater1.DataBind(); //将当前显示的页数改变到页面中去 lit_nownumber.Text = "1"; } void btn_prev_Click(object sender, EventArgs e) { //获取当前页数，计算下一页页数。 int nextnumber = Convert.ToInt32(lit_nownumber.Text) - 1; if (nextnumber < 1) { return; } //将下一页数据绑定到页面中去。 Repeater1.DataSource =enddata(nextnumber); Repeater1.DataBind(); //将当前显示的页数改变到页面中去 lit_nownumber.Text = nextnumber.ToString(); } void btn_next_Click(object sender, EventArgs e) { //获取当前页数，计算下一页页数。 int nextnumber = Convert.ToInt32(lit_nownumber.Text) + 1; if (nextnumber > maxpagenumber2()) { return; } //将下一页数据绑定到页面中去。 Repeater1.DataSource = enddata(nextnumber); Repeater1.DataBind(); //将当前显示的页数改变到页面中去 lit_nownumber.Text = nextnumber.ToString(); } void btn_last_Click(object sender, EventArgs e) { //将下一页数据绑定到页面中去。 Repeater1.DataSource = new user1data().select(pagecount, maxpagenumber2()); Repeater1.DataBind(); //将当前显示的页数改变到页面中去 lit_nownumber.Text = maxpagenumber().ToString(); } public int maxpagenumber() { int a = 0; int maxcount = new user1data().selectcount(); decimal d = Convert.ToDecimal(maxcount) / pagecount; a = Convert.ToInt32(Math.Ceiling(d)); return a; } public List<user1> enddata(int n) { Hashtable hs = new Hashtable(); int count = 0; string tsql = "select top " + pagecount + "* from user1 "; string sql1 = ""; if (TextBox1.Text.Trim().Length > 0) { //匹配名称 sql1 += "where username like @name"; hs.Add("@name", "%" + TextBox1.Text.Trim() + "%"); count++; } if (TextBox2.Text.Trim().Length > 0) { if (count > 0) { //匹配编号 sql1 += " and ids" + DropDownList2.SelectedValue + " @b "; } else { sql1 += " where ids" + DropDownList2.SelectedValue + "@b "; } hs.Add("@b", TextBox2.Text.Trim()); count++; } if (DropDownList3.SelectedValue != "null") { if (count > 0) { //匹配民族 sql1 += " and nation =\'" + DropDownList3.SelectedValue + "\'"; } else { sql1 += " where nation =\'" + DropDownList3.SelectedValue + "\'"; } count++; } ////上面条件查询拼接完毕后，这里拼接分页语句 //int nowpagecount = Convert.ToInt32(lit_nownumber.Text); tsql += sql1; if (count > 0) { tsql += " and ids not in (select top " + (pagecount * (n - 1)) + " ids from user1 " + sql1 + ")"; } else { tsql += " where ids not in (select top " + (pagecount * (n - 1)) + " ids from user1 " + sql1 + ")"; } Label1.Text = tsql; List<user1> ulist = new user1data().selectall(tsql,hs); return ulist; } public int maxpagenumber2() { int end = 0; Hashtable hs = new Hashtable(); int count = 0; string tsql = "select count(*) from user1 "; string sql1 = ""; if (TextBox1.Text.Trim().Length > 0) { //匹配名称 sql1 += "where username like @a "; hs.Add("@a", "%" + TextBox1.Text.Trim() + "%"); count++; } if (TextBox2.Text.Trim().Length > 0) { if (count > 0) { //匹配编号 sql1 += " and ids" + DropDownList2.SelectedValue + " @b "; } else { sql1 += " where ids" + DropDownList2.SelectedValue + "@b "; } hs.Add("@b", TextBox2.Text.Trim()); count++; } if (DropDownList3.SelectedValue != "null") { if (count > 0) { //匹配民族 sql1 += " and nation =\'" + DropDownList3.SelectedValue + "\'"; } else { sql1 += " where nation =\'" + DropDownList3.SelectedValue + "\'"; } count++; } ////上面条件查询拼接完毕后，这里拼接分页语句 //int nowpagecount = Convert.ToInt32(lit_nownumber.Text); tsql += sql1; int aaa= new user1data().selectcount(tsql,hs); Label2.Text = aaa.ToString(); end =Convert.ToInt32( Math.Ceiling( Convert.ToDecimal(aaa) / pagecount)); return end; } }
using System; using System.Collections.Generic; using System.Linq; using System.Web; /// <summary> /// user1 的摘要说明 /// </summary> public class user1 { public int ids { get; set; } public string username { get; set; } public string password { get; set; } public string nickname { get; set; } public bool sex { get; set; } public DateTime birthday { get; set; } public string nation { get; set; } }
using System; using System.Collections; using System.Collections.Generic; using System.Data.SqlClient; using System.Linq; using System.Web; /// <summary> /// user1data 的摘要说明 /// </summary> public class user1data { SqlConnection conn=null; SqlCommand cmd=null; public user1data() { conn = new SqlConnection("server=.;database=data0216;user=sa;pwd=123;"); cmd = conn.CreateCommand(); } public List<user1> selectall() { List<user1> ulist = new List<user1>(); cmd.CommandText = "select * from user1"; conn.Open(); SqlDataReader dr = cmd.ExecuteReader(); while(dr.Read()) { user1 u = new user1(); u.ids = Convert.ToInt32(dr[0]); u.username = dr[1].ToString(); u.password = dr[2].ToString(); u.nickname = dr[3].ToString(); u.sex = Convert.ToBoolean(dr[4]); u.birthday = Convert.ToDateTime(dr[5]); u.nation = dr[6].ToString(); ulist.Add(u); } conn.Close(); return ulist; } public user1 selectuser(string ids) { user1 u = null; cmd.CommandText = "select * from user1 where ids=@a"; cmd.Parameters.Clear(); cmd.Parameters.AddWithValue("@a",ids); conn.Open(); SqlDataReader dr = cmd.ExecuteReader(); if(dr.HasRows) { u = new user1(); dr.Read(); u.ids = Convert.ToInt32(dr[0]); u.username = dr[1].ToString(); u.password = dr[2].ToString(); u.nickname = dr[3].ToString(); u.sex = Convert.ToBoolean(dr[4]); u.birthday = Convert.ToDateTime(dr[5]); u.nation = dr[6].ToString(); } conn.Close(); return u; } public int insertuser(user1 u) { int end = 0; cmd.CommandText = "insert into user1 values(@a,@b,@c,@d,@e,@f)"; cmd.Parameters.Clear(); cmd.Parameters.AddWithValue("@a",u.username); cmd.Parameters.AddWithValue("@b",u.password); cmd.Parameters.AddWithValue("@c",u.nickname); cmd.Parameters.AddWithValue("@d",u.sex); cmd.Parameters.AddWithValue("@e",u.birthday); cmd.Parameters.AddWithValue("@f",u.nation); conn.Open(); end = cmd.ExecuteNonQuery(); conn.Close(); return end; } public int deleteuser(string id) { int end = 0; cmd.CommandText = "delete from user1 where ids=@a"; cmd.Parameters.Clear(); cmd.Parameters.AddWithValue("@a",id); conn.Open(); end = cmd.ExecuteNonQuery(); conn.Close(); return end; } public int updateuser(user1 u) { int end = 0; cmd.CommandText = "update user1 set password=@a,nickname=@b,sex=@c,birthday=@d,nation=@e where ids=@f"; cmd.Parameters.Clear(); cmd.Parameters.AddWithValue("@a",u.password); cmd.Parameters.AddWithValue("@b",u.nickname); cmd.Parameters.AddWithValue("@c",u.sex); cmd.Parameters.AddWithValue("@d",u.birthday); cmd.Parameters.AddWithValue("@e",u.nation); cmd.Parameters.AddWithValue("@f",u.ids); conn.Open(); end = cmd.ExecuteNonQuery(); conn.Close(); return end; } public bool hasuser (string uname,string password) { bool ok = false; cmd.CommandText = "select * from user1 where uname=@a and password=@b"; cmd.Parameters.Clear(); cmd.Parameters.AddWithValue("@a", uname); cmd.Parameters.AddWithValue("@b", password); conn.Open(); SqlDataReader dr = cmd.ExecuteReader(); if (dr.HasRows) { ok = true; } conn.Close(); return ok; } public List<user1> select(int pcount, int pnumber) { List<user1> ulist = new List<user1>(); cmd.CommandText = " select top " + pcount + " * from user1 where ids not in(select top " + (pcount * (pnumber - 1)) + " ids from user1)"; conn.Open(); SqlDataReader dr = cmd.ExecuteReader(); while (dr.Read()) { user1 u = new user1(); u.ids = Convert.ToInt32(dr[0]); u.username = dr[1].ToString(); u.password = dr[2].ToString(); u.nickname = dr[3].ToString(); u.sex = Convert.ToBoolean(dr[4]); u.birthday = Convert.ToDateTime(dr[5]); u.nation = dr[6].ToString(); ulist.Add(u); } conn.Close(); return ulist; } public int selectcount() { int a = 0; cmd.CommandText = "select count(*) from user1"; conn.Open(); SqlDataReader dr = cmd.ExecuteReader(); dr.Read(); a = Convert.ToInt32(dr[0]); conn.Close(); return a; } public int selectcount(string tsql1,Hashtable hh) { Hashtable hs = new Hashtable(); string tsql = "select * from user1 " + tsql1; ////上面条件查询拼接完毕后，这里拼接分页语句 //int nowpagecount = Convert.ToInt32(lit_nownumber.Text); int a = 0; cmd.CommandText = tsql; cmd.Parameters.Clear(); foreach (string s in hh.Keys) { cmd.Parameters.Add(s, hh[s]); } conn.Open(); SqlDataReader dr = cmd.ExecuteReader(); dr.Read(); a = Convert.ToInt32(dr[0]); conn.Close(); return a; } public List<user1> selectall(string tsql,Hashtable hh) { List<user1> ulist = new List<user1>(); cmd.CommandText = tsql; cmd.Parameters.Clear(); foreach (string s in hh.Keys) { cmd.Parameters.Add(s,hh[s]); } conn.Open(); SqlDataReader dr = cmd.ExecuteReader(); while (dr.Read()) { user1 u = new user1(); u.ids = Convert.ToInt32(dr[0]); u.username = dr[1].ToString(); u.password = dr[2].ToString(); u.nickname = dr[3].ToString(); u.sex = Convert.ToBoolean(dr[4]); u.birthday = Convert.ToDateTime(dr[5]); u.nation = dr[6].ToString(); ulist.Add(u); } conn.Close(); return ulist; } }
以上是关于2017-5-25 分页加条件查询合体的主要内容，如果未能解决你的问题，请参考以下文章