亲密接触ASP.Net(14)

个性化分页(2)

上一节大家没有看到总的结构，这一节，我把代码全部贴出来，大家好好看看。

<%@ Page Language="C#" %>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.SQL" %>
<html>
<script language="C#" runat="server">

void Page_Load(Object sender, EventArgs e)
{
    //判断是否隐藏PagerStyle-Mode
    if (chk1.Checked)
    {
        MyDataGrid.PagerStyle.Visible=true;
    }
    else
    {
        MyDataGrid.PagerStyle.Visible=false;
    }

    BindGrid();
}

ICollection CreateDataSource()
{
    /*
        读取数据库的信息，获得DataView
    */
    SQLConnection MyConnection = new SQLConnection("server=localhost;uid=sa;pwd=123456;database=aspcn");
    SQLDataSetCommand MyDataSetCommand = new SQLDataSetCommand("select * from admin_enter order by Enter_Time desc",MyConnection);
    DataSet ds= new DataSet();
    MyDataSetCommand.FillDataSet(ds,"admin_enter");
    return ds.Tables["admin_enter"].DefaultView;
}

void PagerButtonClick(Object sender, EventArgs e)
{
    //获得LinkButton的参数值
    String arg = ((LinkButton)sender).CommandArgument;

    switch(arg)
    {
        case ("next"):
            if (MyDataGrid.CurrentPageIndex < (MyDataGrid.PageCount - 1))
            MyDataGrid.CurrentPageIndex ++;
            break;
        case ("prev"):
            if (MyDataGrid.CurrentPageIndex > 0)
            MyDataGrid.CurrentPageIndex --;
            break;
        case ("last"):
            MyDataGrid.CurrentPageIndex = (MyDataGrid.PageCount - 1);
            break;
        default:
            //本页值
            MyDataGrid.CurrentPageIndex = arg.ToInt32();
            break;
    }
    BindGrid();
}

void MyDataGrid_Page(Object sender, DataGridPageChangedEventArgs e)
{
    //处理按下数字的方法
    BindGrid();
}

void BindGrid()
{
    //将DataView绑定到DataGrid上去
    MyDataGrid.DataSource = CreateDataSource();
    MyDataGrid.DataBind();
    ShowStats();
}

void ShowStats()
{
    //显示页面信息
    lblCurrentIndex.Text = "当前页数为： " + ((int)MyDataGrid.CurrentPageIndex+1);
    lblPageCount.Text = "总页数是： " + MyDataGrid.PageCount;
}

</script>

<body>

<h3><font face="Verdana">个性化的分页实例^&^</font></h3>

<form runat=server>

<ASP:DataGrid id="MyDataGrid" runat="server"
AllowPaging="True"
PageSize="10"
PagerStyle-Mode="NumericPages"
PagerStyle-HorizontalAlign="Right"
OnPageIndexChanged="MyDataGrid_Page"
BorderColor="black"
BorderWidth="1"
GridLines="Both"
CellPadding="3"
CellSpacing="0"
Font-Name="Verdana"
Font-Size="8pt"
HeaderStyle-BackColor="#aaaadd"
AlternatingItemStyle-BackColor="#eeeeee"
AutoGenerateColumns="false"

>
<property name="Columns">
<asp:BoundColumn HeaderText="工作室成员" DataField="Enter_ID" />
<asp:BoundColumn HeaderText="登陆时间" DataField="Enter_Time" />
</property>
</ASP:DataGrid>

<p>
<asp:LinkButton id="btnFirst" runat="server"
Text="首页"
CommandArgument="0"
ForeColor="navy"
Font-Name="verdana" Font-size="8pt"
OnClick="PagerButtonClick"
/>
 
<asp:LinkButton id="btnPrev" runat="server"
Text="前页"
CommandArgument="prev"
ForeColor="navy"
Font-Name="verdana" Font-size="8pt"
OnClick="PagerButtonClick"
/>
 
<asp:LinkButton id="btnNext" runat="server"
Text="后页"
CommandArgument="next"
ForeColor="navy"
Font-Name="verdana" Font-size="8pt"
OnClick="PagerButtonClick"
/>
 

<asp:LinkButton id="btnLast" runat="server"
Text="末页"
CommandArgument="last"
ForeColor="navy"
Font-Name="verdana" Font-size="8pt"
OnClick="PagerButtonClick"
/>

<p>
<asp:Checkbox id="chk1" runat="server"
Text="显示内置的页数"
Font-Name="Verdana"
Font-Size="8pt"
AutoPostBack="true"
/>

<p>
<table bgcolor="#eeeeee" cellpadding="6"><tr><td nowrap><font face="Verdana" size="-2">

<asp:Label id="lblCurrentIndex" runat="server" /><br>
<asp:Label id="lblPageCount" runat="server" /><br>

</font></td></tr></table>
</form>

</body>

</html>

上面是全部的源代码，执行后的显示是:

图14-1

按下随便一个键，比如"末页"

图14-2

看，我们的程序就直接到了最后一页，即第5页，我们在下面的"当前页数"可以看到：）

我们再来点击"显示内置的页数"这个复选框，看看：

图14-3

看，我们前两节看到的那些小数字也出来了：）