解析GridView自带分页及与DropDownList结合使用
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2022-05-14 21:19:53
gridview自带的分页功能实现：
要实现grdview分页的功能
操作如下：
更改grdview控件的allowpaging属性为true。
更改g...
gridview自带的分页功能实现：
要实现grdview分页的功能
操作如下：
- 更改grdview控件的allowpaging属性为true。
- 更改grdview控件的pagesize属性为 任意数值（默认为10）
- 更改grdview控件的pagesetting->mode为numeric等（默认为numeric）该属性为分页样式。
gridview属性设置好了，从页面上也能看到分页样式。
现在开始实现分页的功能：
- 在<<asp:gridview id=......>后添加，onpageindexchanging="gridview1_pageindexchanging"
- 在对应的aspx.cs中添加：
protected void gridview1_pageindexchanging(object sender, gridviewpageeventargs e)
{
gridview1.pageindex = e.newpageindex;
initpage(); //重新绑定gridview数据的函数
}
参考代码：
<%@ page language="c#" autoeventwireup="true" codefile="gridview_zidaifenye.aspx.cs" inherits="gridview_zidaifenye" %>
<!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">
<div>
<asp:gridview id="gridview1" runat="server" allowpaging="true" allowsorting="true"
autogeneratecolumns="false" datakeynames="id" pagersettings-mode="numeric"
onrowdatabound="gridview1_rowdatabound" pagesize="5" onpageindexchanging="gridview1_pageindexchanging">
<columns>
<asp:boundfield datafield="id" headertext="id" insertvisible="false" readonly="true"
sortexpression="id" />
<asp:boundfield datafield="name" headertext="name" sortexpression="name" />
<asp:boundfield datafield="stock" headertext="stock" sortexpression="stock" />
</columns>
</asp:gridview>
每页显示<asp:dropdownlist id="dropdownlist1" runat="server" autopostback="true" onselectedindexchanged="dropdownlist1_selectedindexchanged">
<asp:listitem>5</asp:listitem>
<asp:listitem>10</asp:listitem>
<asp:listitem>15</asp:listitem>
</asp:dropdownlist>
条记录
<asp:label id="lblmsg" runat="server"></asp:label>
</div>
</form>
</body>
</html>
后台代码：
using system;
using system.collections.generic;
using system.data;
using system.data.sqlclient;
using system.linq;
using system.web;
using system.web.ui;
using system.web.ui.webcontrols;
public partial class gridview_zidaifenye : system.web.ui.page
{
dbaccess db = new dbaccess();
protected void page_load(object sender, eventargs e)
{
if (!ispostback)
{
// gvproduct.datasource = getdata();
// gvproduct.databind();
bindgrid();
}
}
public void bindgrid()
{
sqlcommand comm = db.createcommand("select * from product p,uuser u where p.userid=u.id");
sqldataadapter sda = new sqldataadapter();
sda.selectcommand = comm;
dataset ds = new dataset();
sda.fill(ds,"datatable");
dataview dv = ds.tables[0].defaultview;
gridview1.datasource = dv;
gridview1.databind();
}
protected void dropdownlist1_selectedindexchanged(object sender, eventargs e)
{
gridview1.pagesize = int.parse(dropdownlist1.selectedvalue);
gridview1.pageindex = 0;
bindgrid(); //gridview1.databind();
}
protected void gridview1_rowdatabound(object sender, gridviewroweventargs e)
{
lblmsg.text = "当前页为第" + (gridview1.pageindex + 1).tostring() + "页，共" + (gridview1.pagecount).tostring() + "页";
}
protected void gridview1_pageindexchanging(object sender, gridviewpageeventargs e)
{
gridview1.pageindex = ((gridviewpageeventargs)e).newpageindex;
bindgrid(); //重新绑定gridview数据的函数
}
}
总结下，方便以后用到。
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