我想适当加些代码，用以下功能代码写一个web分页控件。希望大虾们帮帮我啊！

凤凰涅檠 2007-07-10 04:54:35

这是一个简单的分页代码：

aspx:
<table width="100%">
<tr>
<td width="100%" style="text-align: right">
<span style="font-size: 10pt">总共：</span><asp:Label ID="lblRecordCount" runat="server"
ForeColor="red"></asp:Label>条记录当前：<asp:Label ID="lblCurrentPage" runat="server"
ForeColor="Red"></asp:Label>/<asp:Label ID="lblPageCount" runat="server" ForeColor="Red"></asp:Label>页
转到： <asp:DropDownList ID="Ddl_PageNumber" runat="server" AutoPostBack="true"
CssClass="lanyu">
</asp:DropDownList>页
<asp:LinkButton ID="BtnFirst" runat="server" CommandName="First" Font-Size="10pt"
OnCommand="Page_OnClick" Text="首页">首页</asp:LinkButton>
<asp:LinkButton ID="lbnPrevPage" runat="server" CommandName="prev" Font-Size="10pt"
OnCommand="Page_OnClick" Text="上一页"></asp:LinkButton>
<asp:LinkButton ID="lbnNextPage" runat="server" CommandName="next" Font-Size="10pt"
OnCommand="Page_OnClick" Text="下一页"></asp:LinkButton>
<asp:LinkButton ID="BtnLast" runat="server" CommandName="Last" Font-Size="10pt" OnCommand="Page_OnClick"
Text="尾页">尾页</asp:LinkButton>
</td>
</tr>
</table>

cs:
public partial class data_updGoods : System.Web.UI.Page
{
string constr = (ConfigurationManager.ConnectionStrings["jxcConnectionString"]).ToString();
int PageSize, RecordCount, PageCount, CurrentPage, i;
ArrayList Al_PageNum;

public void Page_Load(Object src, EventArgs e)
{
readnum();
}
public void readnum()
{
PageSize = 6; //设定PageSize
SqlConnection MyConn = new SqlConnection(constr);
MyConn.Open();
if (!IsPostBack) //第一次请求执行
{
RecordCount = CalculateRecord(); //计算总共有多少记录/

PageCount = RecordCount / PageSize; //计算总共有多少页
if (RecordCount % PageSize > 0) //取整
{
PageCount = PageCount + 1;
}
lblPageCount.Text = PageCount.ToString();
lblRecordCount.Text = RecordCount.ToString();
ViewState["PageCount"] = PageCount;
CurrentPage = 0;
ViewState["PageIndex"] = 0;

Al_PageNum = new ArrayList();//绑定DROPDOWNLIST
for (i = 1; i <= PageCount; i++) //从1开始循环，为了不出现0页码
{
Al_PageNum.Add(i.ToString());
}
Ddl_PageNumber.DataSource = Al_PageNum;
Ddl_PageNumber.DataBind();
ListBind(); //绑定
}
MyConn.Close();
}
public int CalculateRecord() //计算总共有多少条记录
{
SqlConnection MyConn = new SqlConnection(constr);
int intCount;
string strCount = "select count(*) as co from Goods";
SqlCommand MyComm = new SqlCommand(strCount, MyConn);
MyConn.Open();
SqlDataReader dr = MyComm.ExecuteReader();
if (dr.Read())
{
intCount = Int32.Parse(dr["co"].ToString());
}
else
{
intCount = 0;
}
dr.Close();
MyConn.Close();
return intCount;
}

public void ListBind()
{
SqlConnection MyConn = new SqlConnection(constr);
int StartIndex; //设定导入的起终地址
StartIndex = CurrentPage * PageSize; //计算记录数的起始点
string strSel = "select * from Goods";
DataSet ds = new DataSet();
SqlDataAdapter MyAdapter = new SqlDataAdapter(strSel, MyConn);
MyAdapter.Fill(ds, StartIndex, PageSize, "Goods");
GridView1.DataSource = ds.Tables["Goods"].DefaultView;
GridView1.DataBind();

lbnNextPage.Enabled = true;
lbnPrevPage.Enabled = true;
BtnFirst.Enabled = true;
BtnLast.Enabled = true;
if (PageCount == 0)
{
lblCurrentPage.Text = "0";
lbnNextPage.Enabled = false;
lbnPrevPage.Enabled = false;
BtnFirst.Enabled = false;
BtnLast.Enabled = false;
}
else
{
if (CurrentPage == (PageCount - 1))
{
lbnNextPage.Enabled = false;
BtnLast.Enabled = false;
}
if (CurrentPage == 0)
{
lbnPrevPage.Enabled = false;
BtnFirst.Enabled = false;
}
lblCurrentPage.Text = (CurrentPage + 1).ToString();
}
Ddl_PageNumber.Text = lblCurrentPage.Text;
}

public void Page_OnClick(Object sender, CommandEventArgs e)//上一页，下一页的单击代码
{
CurrentPage = (int)ViewState["PageIndex"];
PageCount = (int)ViewState["PageCount"];
string cmd = e.CommandName; //判断cmd，以判定翻页方向
switch (cmd)
{
case "next":
if (CurrentPage < (PageCount - 1)) CurrentPage++;
break;
case "prev":
if (CurrentPage > 0) CurrentPage--;
break;
case "Last":
CurrentPage = (PageCount - 1);
break;
default:
CurrentPage = 0;
break;
}

ViewState["PageIndex"] = CurrentPage;
ListBind();

}
public void PageNum_SelectIndexChanged(object sender, System.EventArgs e)
{
ViewState["PageIndex"] = int.Parse(Ddl_PageNumber.SelectedItem.Value) - 1;//保持不出现0页码
//PageSize = 3;
CurrentPage = (int)ViewState["PageIndex"];
PageCount = (int)ViewState["PageCount"];
ListBind();
}

override protected void OnInit(EventArgs e)
{
this.Load += new System.EventHandler(this.Page_Load);
this.Ddl_PageNumber.SelectedIndexChanged += new System.EventHandler(this.PageNum_SelectIndexChanged);
base.OnInit(e);
}
}

我没写过控件，希望借此学习如何自己编写自定义的控件。我会认真研究大侠们给的代码，希望大侠们多多帮助！

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