学习目的：学会用DATAGRID分页显示
虽然说DATAGRID的分页显示效率不怎么高，但是不管怎么说，它是最方便的分页显示，对于做一个留言簿还是相当简单实用的。对于启用分页功能还有一个重要要求，只能在DATADRID控件的数据源实现了ICOLLECTION接口的情况下才能启用分页功能，而DATAREADER没有这个接口，所以必须使用DATATABLE来代替。
＜script runat="server" language="c#"＞void Page_Load(){ string strConnection="Provider=Microsoft.Jet.OleDb.4.0;Data Source=";strConnection+=Server.MapPath("guestbook.mdb");OleDbConnection objConnection=new OleDbConnection(strConnection);OleDbDataAdapter objDataAdapter=new OleDbDataAdapter("select * from guestbook",objConnection);DataSet objDataSet=new DataSet();objDataAdapter.Fill(objDataSet);dgrdMain.DataSource=objDataSet;dgrdMain.DataBind();}void dgrdMain_PageIndexChanged(Object sender, DataGridPageChangedEventArgs e){dgrdMain.CurrentPageIndex = e.NewPageIndex; DataBind(); } ＜/script＞＜html＞＜body＞ ＜asp:DataGrid id="dgrdMain" cellpadding="1" showheader="true" borderwidth="0"allowpaging="true" 启用分页功能pagesize="3" 每一页显示三条记录 onpageindexchanged="dgrdMain_pageindexchanged " 调用第×页的函数为dgrdMain_PageIndexChanged()runat="server" /＞ ＜/body＞＜/html＞
＜script runat="server" language="vb"＞subPage_Loaddim objConnection as OleDbConnectiondim objDataAdapter as OleDbDataAdapterdim objDataSet as DataSetobjConnection=new OleDbConnection("Provider=Microsoft.Jet.OleDb.4.0;Data Source="+Server.MapPath("guestbook.mdb"))objDataAdapter=new OleDbDataAdapter("select * from guestbook",objConnection)objDataSet=new DataSetobjDataAdapter.Fill(objDataSet) dgrdMain.DataSource=objDataSetdgrdMain.DataBind()end subsub dgrdMain_PageIndexChanged(sender as object,e as datagridpagechangedeventargs)dgrdMain.CurrentPageIndex = e.NewPageIndexDataBindend sub＜/script＞ ＜html＞＜body＞ ＜asp:DataGrid id="dgrdMain" cellpadding="1" showheader="true" borderwidth="0"allowpaging="true" 启用分页功能pagesize="3" 每一页显示三条记录 onpageindexchanged="dgrdMain_pageindexchanged " 调用第×页的函数为dgrdMain_PageIndexChanged()runat="server" /＞ ＜/body＞＜/html＞
今天就说到这里，明天说一下SESSION和COOKIE。
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