Webform（分页与组合查询配合使用）
1.封装实体类
2.写查询方法
//SubjectData类
public List<Subject> Select(string name)
{
List<Subject> list = new List<Subject>();
cmd.CommandText = "select *from Subject where SubjectName like @a ";
cmd.Parameters.Clear();
cmd.Parameters.Add("@a","%"+name+"%");
conn.Open();
SqlDataReader dr = cmd.ExecuteReader();
if (dr.HasRows)
{
while (dr.Read())
{
Subject s = new Subject();
s.SubjectCode = dr[].ToString();
s.SubjectName = dr[].ToString();
list.Add(s);
}
}
conn.Close(); return list;
}
//StudentData类
/// <summary>
/// 查询方法
/// </summary>
/// <param name="tsql">SQL语句</param>
/// <param name="hh">哈希表</param>
/// <returns></returns>
public List<Student> Select(string tsql,Hashtable hh)
{
List<Student> list = new List<Student>();
cmd.CommandText = tsql;
cmd.Parameters.Clear();
foreach( string s in hh.Keys)
{
cmd.Parameters.Add(s,hh[s]);
}
conn.Open();
SqlDataReader dr = cmd.ExecuteReader();
if (dr.HasRows)
{
while (dr.Read())
{
Student s = new Student();
s.Code = dr[].ToString();
s.Name = dr[].ToString();
s.Sex = Convert.ToBoolean(dr[]);
s.Birthday = Convert.ToDateTime(dr[]);
s.SubjectCode = dr[].ToString();
s.Nation = dr[].ToString();
list.Add(s);
}
}
conn.Close();
return list;
}
3.Page_Load部分，最大页方法
int PageCount = ; //每页显示条数
Hashtable hs = new Hashtable();
protected void Page_Load(object sender, EventArgs e)
{
if(!IsPostBack)
{
string tsql = "select top "+PageCount+" *from Student";//查询前PageCount条数据
//Repeater1数据源指向
List<Student> list = new StudentData().Select(tsql,hs);
Repeater1.DataSource = list;
Repeater1.DataBind();
Label2.Text = "";//第一页
//获取最大页
string sql = "select *from Student";
Label3.Text = MaxPageNumber(sql,hs).ToString();
for (int i = ; i <= MaxPageNumber(sql,hs); i++)//给可快速跳转列表框赋值
{
DropDownList2.Items.Add(new ListItem(i.ToString(), i.ToString()));
}
}
}
Page_Load
public int MaxPageNumber(string sql, Hashtable hs)
{
List<Student> list = new StudentData().Select(sql, hs);//查询所有数据 double de = list.Count / (PageCount * 1.0); int aa = Convert.ToInt32(Math.Ceiling(de));//取上限
return aa;
}
获取最大页
4.根据组合查询拼接语句方法
/// <summary>
///
/// </summary>
/// <param name="sql">拼接查询前PageCount条数据的语句</param>
/// <param name="sql2">查询所有的语句</param>
/// <param name="tj">用于分页查询与sql等拼接</param>
/// <param name="count">判断前几项是否为空</param>
private void Tsql(out string sql, out string sql2,out string tj,out int count)
{
count = ;
sql = "select top " + PageCount + " *from Student";
sql2 = "select *from Student";
tj = "";
//性别不为空
if (!string.IsNullOrEmpty(tb_sex.Text.Trim()))
{//判断输入的是男是女，其它输入默认为未输入内容
if (tb_sex.Text.Trim() == "男")
{
sql += " where Sex = @a";
sql2 += " where Sex = @a";
tj += " where Sex = @a";
hs.Add("@a", "true");
count++;
}
else if (tb_sex.Text.Trim() == "女")
{
sql += " where Sex = @a";
sql2 += " where Sex = @a";
tj += " where Sex = @a";
hs.Add("@a", "false");
count++;
}
}
//年龄不为空
if (!string.IsNullOrEmpty(tb_age.Text.Trim()))
{
int a = DateTime.Now.Year;//获取当前时间的年
try//确保输入的是数字
{
int ag = Convert.ToInt32(tb_age.Text.Trim());
int g = a - ag;
DateTime d = Convert.ToDateTime(g.ToString() + "-1-1");
if (DropDownList3.SelectedValue == ">=")//小于或等于您输入的年龄,即大于或等于某个时间
{
if (count == )//前面的一项未输入（性别）
{
sql += " where Birthday " + DropDownList3.SelectedValue + "@b";
sql2 += " where Birthday " + DropDownList3.SelectedValue + "@b";
tj += " where Birthday " + DropDownList3.SelectedValue + "@b";
}
else
{
sql += " and Birthday " + DropDownList3.SelectedValue + "@b";
sql2 += " and Birthday " + DropDownList3.SelectedValue + "@b";
tj += " and Birthday " + DropDownList3.SelectedValue + "@b";
}
hs.Add("@b", d);
}
else//大于或等于您输入的年龄,即小于或等于某个时间
{
DateTime dd = Convert.ToDateTime(g.ToString() + "-12-31");
if (count == )
{
sql += " where Birthday " + DropDownList3.SelectedValue + "@b";
sql2 += " where Birthday " + DropDownList3.SelectedValue + "@b";
tj += " where Birthday " + DropDownList3.SelectedValue + "@b";
}
else
{
sql += " and Birthday " + DropDownList3.SelectedValue + "@b";
sql2 += " and Birthday " + DropDownList3.SelectedValue + "@b";
tj += " and Birthday " + DropDownList3.SelectedValue + "@b";
}
hs.Add("@b", dd);
}
count++;
}
catch
{
}
}
if (!string.IsNullOrEmpty(tb_s.Text.Trim()))//判断专业是否为空
{
List<Subject> li = new SubjectData().Select(tb_s.Text.Trim());//调用查询方法模糊查询专业
if (li.Count <= )//未查到数据
{
}
else//查到数据
{
int cou = ;//用于查到的为多条数据
foreach (Subject ub in li)
{
if (li.Count == )//只查到一条数据
{
if (count == )//性别与年龄输入框都未输入内容
{
sql += " where SubjectCode =@c";
sql2 += " where SubjectCode =@c";
tj += " where SubjectCode =@c";
}
else
{
sql += " and SubjectCode =@c";
sql2 += " and SubjectCode =@c";
tj += " and SubjectCode =@c";
}
hs.Add("@c", ub.SubjectCode);
cou++;
count++;
}
else//查到多条数据
{
if (cou == )//第一次遍历
{
if (count == )
{
sql += " where (SubjectCode =@c";
sql2 += " where (SubjectCode =@c";
tj += " where (SubjectCode =@c";
}
else//性别与年龄输入框都未输入内容
{
sql += " and (SubjectCode =@c";
sql2 += " and (SubjectCode =@c";
tj += " and (SubjectCode =@c";
}
hs.Add("@c", ub.SubjectCode);
cou++;
}
else
{
sql += " or SubjectCode =@d)";
sql2 += " or SubjectCode =@d)";
tj += " or SubjectCode =@d)";
hs.Add("@d", ub.SubjectCode);
}
} }
}
}
}
Tsql方法
5.组合查询 按钮功能赋予
void Button2_Click(object sender, EventArgs e)
{
string sql;//拼接查询前PageCount条数据的语句
string sql2;//查询所有的语句
string tj;
int count;
Tsql(out sql, out sql2,out tj,out count);
Repeater1.DataSource = new StudentData().Select(sql, hs);//数据指向
Repeater1.DataBind();
Label2.Text = "";
Label3.Text = MaxPageNumber(sql2,hs).ToString();//获取当前的最大页
DropDownList2.Items.Clear();
for (int i = ; i <= MaxPageNumber(sql2,hs); i++)//更新快捷跳转列表框
{
DropDownList2.Items.Add(new ListItem(i.ToString(), i.ToString()));
}
}
组合查询
6.分页代码
void btn_next_Click(object sender, EventArgs e)
{
int pagec = Convert.ToInt32(Label2.Text) + ;//获取下一页为第几页
string sql;//拼接查询前PageCount条数据的语句
string sql2;//查询所有的语句
string tj;
int count;
Tsql(out sql, out sql2, out tj, out count);
if (pagec > MaxPageNumber(sql2,hs))//当前为最大页
{
return;
}
else
{
if(count>)//进行的是组合查询的下一页跳转
{
sql += " and Code not in(select top " + (PageCount * (pagec - )) + " Code from Student " + tj + ")";
}
else
{
sql += " where Code not in(select top " + (PageCount * (pagec - )) + " Code from Student " + tj + ")";
}
}
Repeater1.DataSource = new StudentData().Select(sql, hs);//数据指向
Repeater1.DataBind();
Label2.Text = pagec.ToString();//更新当前页面
DropDownList2.SelectedValue = pagec.ToString();
}
下一页
void btn_prev_Click(object sender, EventArgs e)
{
int pagec = Convert.ToInt32(Label2.Text) - ;//获取上一页为第几页
string sql;//拼接查询前PageCount条数据的语句
string sql2;
string tj;
int count;
Tsql(out sql, out sql2, out tj, out count);
if (pagec <= )//当前为第一页
{
return;
}
if (count > )//进行的是组合查询的上一页跳转
{
sql += " and Code not in(select top " + (PageCount * (pagec - )) + " Code from Student " + tj + ")";
}
else
{
sql += " where Code not in(select top " + (PageCount * (pagec - )) + " Code from Student " + tj + ")";
}
List<Student> list = new StudentData().Select(sql, hs);//数据指向
Repeater1.DataSource = list;
Repeater1.DataBind();
Label2.Text = pagec.ToString();//更新当前页面
DropDownList2.SelectedValue = pagec.ToString();
}
上一页
void btn_first_Click(object sender, EventArgs e)
{
string sql;
string sql2;
string tj;
int count;
Tsql(out sql, out sql2, out tj, out count);
List<Student> list = new StudentData().Select(sql, hs);//数据指向
Repeater1.DataSource = list;
Repeater1.DataBind();
Label2.Text = "";
DropDownList2.SelectedValue = "";
}
跳转到第一页
void btn_end_Click(object sender, EventArgs e)
{
string sql;
string sql2;
string tj;
int count;
Tsql(out sql, out sql2, out tj, out count);
if (count > )//进行的是组合查询的末页跳转
{
sql += " and Code not in(select top " + (PageCount * (MaxPageNumber(sql2,hs) - )) + " Code from Student " + tj + ")";
}
else
{
sql += " where Code not in(select top " + (PageCount * (MaxPageNumber(sql2, hs) - )) + " Code from Student " + tj + ")";
}
List<Student> list = new StudentData().Select(sql, hs);//数据指向
Repeater1.DataSource = list;
Repeater1.DataBind();
Label2.Text = MaxPageNumber(sql2,hs).ToString();
DropDownList2.SelectedValue = MaxPageNumber(sql2,hs).ToString();
}
最后一页跳转
void DropDownList2_SelectedIndexChanged(object sender, EventArgs e)
{
string sql;
string sql2;
string tj;
int count;
Tsql(out sql, out sql2, out tj, out count);
if (count > )//进行的是组合查询的快捷跳转
{
sql += " and Code not in(select top " + (PageCount * (Convert.ToInt32(DropDownList2.SelectedValue) - )) + " Code from Student " + tj + ")";
}
else
{
sql += " where Code not in(select top " + (PageCount * (Convert.ToInt32(DropDownList2.SelectedValue) - )) + " Code from Student " + tj + ")";
}
Repeater1.DataSource = new StudentData().Select(sql, hs);//数据指向
Repeater1.DataBind();
Label2.Text = DropDownList2.SelectedValue;
}
快捷跳转
预览图：
Webform（分页与组合查询配合使用）的更多相关文章
- ajax分页与组合查询配合使用
使用纯HTML页与js.ajax.Linq实现分页与组合查询的配合使用 <body> <div id="top"><input type=" ...
- webform 分页、组合查询综合使用
界面: <%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx ...
- WebForm 分页与组合查询
1.封装实体类 2.写查询方法 //SubjectData类 public List<Subject> Select(string name) { List<Subject> ...
- WebForm 分页、组合查询--2017年1月5日
sql = "select * from Commodity"; hs = new Hashtable(); if (txt_name.Text.Trim() != "& ...
- Webform（Linq高级查、分页、组合查询）
一.linq高级查 1.模糊查(包含) 1 public List<User> Select(string name) 2 { 3 return con.User.Where(r => ...
- Webform（分页、组合查询）
一.分页 1.写查询方法: public List<Student> Select(int PageCount, int PageNumber) {//PageCount为每页显示条数,P ...
- WebForm之Linq组合查询
组合查询 protected void Button1_Click(object sender, EventArgs e) { //默认查询所有,返回的是Table类型,转换成IQueryAble类型 ...
- Linq的分页与组合查询的配合使用
1.首先使用Linq连接数据库,并扩展属性 public partial class User { public string SexStr { get { string end = "&l ...
- linq分页组合查询
一.linq高级查 1.模糊查(字符串包含) 1 public List<User> Select(string name) 2 { 3 return con.User.Where(r = ...
随机推荐
- gulp/grunt和browserify/webpack的区别
Gulp应该和Grunt比较,他们的区别我就不说了,说说用处吧.Gulp / Grunt 是一种工具,能够优化前端工作流程.比如自动刷新页面.combo.压缩css.js.编译less等等.简单来说, ...
- javascript中关于日期和时间的基础知识
× 目录 [1]标准时间 [2]字符串 [3]闰年[4]月日[5]星期[6]时分秒 前面的话 在介绍Date对象之前,首先要先了解关于日期和时间的一些知识.比如,闰年.UTC等等.深入了解这些,有助于 ...
- 拓扑排序(三)之 Java详解
前面分别介绍了拓扑排序的C和C++实现,本文通过Java实现拓扑排序. 目录 1. 拓扑排序介绍 2. 拓扑排序的算法图解 3. 拓扑排序的代码说明 4. 拓扑排序的完整源码和测试程序 转载请注明出处 ...
- 牛顿法与拟牛顿法学习笔记（三）DFP 算法
机器学习算法中经常碰到非线性优化问题,如 Sparse Filtering 算法,其主要工作在于求解一个非线性极小化问题.在具体实现中,大多调用的是成熟的软件包做支撑,其中最常用的一个算法是 L-BF ...
- 优秀前端开发教程：超炫的 Mobile App 3D 演示
今天,我们想与您分享一个实验性的3D效果.它涉及到一个3D移动设备和一些移动应用程序截图.点击切换按钮时,我们将让移动设备转动并移动每个画面,使我们能看到一个分层的视图.你可能之前没见过这种应用程序演 ...
- Elasticsearch——Date Math在索引中的用法详解
在elasticsearch中,有时会想要通过索引日期来筛选查询的数据,此时就需要用到日期数学表达式. 更多内容参考Elasticsearch翻译汇总 基于日期数学表达式的索引 模式如下: <s ...
- WebGL实现HTML5的3D贪吃蛇游戏
js1k.com收集了小于1k的javascript小例子,里面有很多很炫很酷的游戏和特效,今年规则又增加了新花样,传统的classic类型基础上又增加了WebGL类型,以及允许增加到2K的++类型, ...
- 关于WEB Service&WCF&WebApi实现身份验证之WCF篇（2）
因前段时间工作变动(换了新工作)及工作较忙暂时中断了该系列文章,今天难得有点空闲时间,就继续总结WCF身份验证的其它方法.前面总结了三种方法(详见:关于WEB Service&WCF& ...
- 给swift程序猿留下深刻印象的10个Swift代码
通过使用单行代码完成同样的 10 个练习,我们来看看 Swift 和其他语言之间的较量. 将数组中每个元素的值乘以 2 使用map来实现 var arr = [1,2,3,4]; var newArr ...
- 解析导航栏的url--selnium，beautifulsoup实战
前段时间做ui自动化测试的时候,导航栏菜单始终有点问题,最后只好直接获取到url,然后直接使用driver.get(url)进入页面: 包括做压测的时候,比如我要找出所有报表菜单的url,这样不可能手 ...