asp.net Datalist控件实现分页功能

<asp:datalist id="datalist1" runat="server" width="976px" height="745px" borderwidth="2px" cellpadding="2" cellspacing="2" repeatcolumns="7" repeatdirection="vertical" bordercolor="#666666">
<itemtemplate >
<table >
<tr>
<td >
<a href='<%#"show.aspx?iname="+eval("iname")%>'><img src='upimage/<%#databinder.eval(container.dataitem,"iname") %>' width="120" alt="点击查看大图"/></a>
</td>
</tr>
</table>
</itemtemplate>
</asp:datalist><asp:sqldatasource id="sqldatasource1" runat="server" connectionstring="<%$ connectionstrings:s601connectionstring %>" selectcommand="select [iname] from [image]" ></asp:sqldatasource>
<table style="width: 976px" cellpadding="0" cellspacing="0">
<tr>
<td style="width:976px; text-align: right; font-size:12pt; height:25px;">
<asp:label id="label7" runat="server" text="当前页码为："></asp:label>
[
<asp:label id="labpage" runat="server" text="1"></asp:label>
 ]
<asp:label id="label6" runat="server" text="总页码为："></asp:label>
[
<asp:label id="labbackpage" runat="server"></asp:label>
 ]<asp:linkbutton id="lnkbtnone" runat="server" font-underline="false" forecolor="red"
onclick="lnkbtnone_click">第一页</asp:linkbutton>
<asp:linkbutton id="lnkbtnup" runat="server" font-underline="false" forecolor="red"
onclick="lnkbtnup_click">上一页</asp:linkbutton>
<asp:linkbutton id="lnkbtnnext" runat="server" font-underline="false" forecolor="red"
onclick="lnkbtnnext_click">下一页</asp:linkbutton> 
<asp:linkbutton id="lnkbtnback" runat="server" font-underline="false" forecolor="red"
onclick="lnkbtnback_click">最后一页</asp:linkbutton>  </td>
</tr>
</table>

protected void page_load(object sender, eventargs e)
{
dlbind();

}
public void dlbind()
{
sqlconnection sqlcon;
string strcon = "data source=(local);database=s601;uid=sa;pwd=123456";
int curpage = convert.toint32(this.labpage.text);
pageddatasource ps = new pageddatasource();
sqlcon = new sqlconnection(strcon);
sqlcon.open();
string sqlstr = "select [iname],iid from [image]";
sqldataadapter myadapter = new sqldataadapter(sqlstr, sqlcon);
dataset ds = new dataset();
myadapter.fill(ds, "iid");
ps.datasource = ds.tables["iid"].defaultview;
ps.allowpaging = true; //是否可以分页
ps.pagesize = 35; //显示的数量
ps.currentpageindex = curpage - 1; //取得当前页的页码
this.lnkbtnup.enabled = true;
this.lnkbtnnext.enabled = true;
this.lnkbtnback.enabled = true;
this.lnkbtnone.enabled = true;
if (curpage == 1)
{
this.lnkbtnone.enabled = false;//不显示第一页按钮
this.lnkbtnup.enabled = false;//不显示上一页按钮
}
if (curpage == ps.pagecount)
{
this.lnkbtnnext.enabled = false;//不显示下一页
this.lnkbtnback.enabled = false;//不显示最后一页
}
this.labbackpage.text = convert.tostring(ps.pagecount);
this.datalist1.datasource = ps;
this.datalist1.datakeyfield = "iid";
this.datalist1.databind();
sqlcon.close();
}
protected void lnkbtnone_click(object sender, eventargs e)
{
this.labpage.text = "1";
this.dlbind();
}
protected void lnkbtnup_click(object sender, eventargs e)
{
this.labpage.text = convert.tostring(convert.toint32(this.labpage.text) - 1);
this.dlbind();
}
protected void lnkbtnnext_click(object sender, eventargs e)
{
this.labpage.text = convert.tostring(convert.toint32(this.labpage.text) + 1);
this.dlbind();
}
protected void lnkbtnback_click(object sender, eventargs e)
{
this.labpage.text = this.labbackpage.text;
this.dlbind();
}