分页代码 —1

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using BLL;
using Model;

public partial class ProdList : System.Web.UI.Page
{
    ShopItemsBLL shopitemsbll = new ShopItemsBLL();
    MaxTypeBLL maxtypebll = new MaxTypeBLL();
    ProdTypeBLL prodtypebll = new ProdTypeBLL();
    MinTypeBLL mintypebll = new MinTypeBLL();

    ArrayList tmparry;

    private int _Page; //当前页数
    private int PageCount; //总页数
    private int PageSize = 12; //一页多少条数据
    private int DataCount;  //数据总条数

    protected void Page_Load(object sender, EventArgs e)
    {
        if(!this.IsPostBack)
        {
            _Page = 1;
            ViewState["page"] = 1;

            BindList();

            this.DropDownList1.DataSource = maxtypebll.GetMaxType();
            this.DropDownList1.DataTextField = "Tname";
            this.DropDownList1.DataValueField = "Tid";
            this.DropDownList1.DataBind();
            this.DropDownList1.Items.Insert(0, "请选择商品类型");

            if (Request.QueryString["maxtype"] != null)  //如果有大类型参数
            {
                MaxType maxtype = maxtypebll.GetMaxTypeByTid(Convert.ToInt32(Request.QueryString["maxtype"].ToString()));
                this.DropDownList1.SelectedValue = maxtype.Tid.ToString();

                this.DropDownList2.DataSource = prodtypebll.GetProdType(Convert.ToInt32(this.DropDownList1.SelectedValue));
                this.DropDownList2.DataTextField = "Ptype";
                this.DropDownList2.DataValueField = "Pid";
                this.DropDownList2.DataBind();
                this.DropDownList2.Items.Insert(0,"请选择商品分类");
            }
            else
            {
                this.DropDownList2.Items.Add("请选择商品分类");
            }

            if (Request.QueryString["mintype"] != null)  //如果有小类型参数
            {
                ProdType prodtype = prodtypebll.GetProdTypeByPid(Convert.ToInt32(Request.QueryString["mintype"].ToString()));
                this.DropDownList2.SelectedValue = prodtype.Pid.ToString();

                this.DropDownList3.DataSource = mintypebll.GetMinTypeByPId(Convert.ToInt32(this.DropDownList2.SelectedValue));
                this.DropDownList3.DataTextField = "Mname";
                this.DropDownList3.DataValueField = "Mid";
                this.DropDownList3.DataBind();
                this.DropDownList3.Items.Insert(0, "请选择商品分类");
            }
            else
            {
                this.DropDownList3.Items.Add("请选择商品分类");
            }

            if (Request.QueryString["xitype"] != null)  //如果有细类型参数
            {
                MinType mintype = mintypebll.GetMinTypeByMid(Convert.ToInt32(Request.QueryString["xitype"].ToString()));
                this.DropDownList3.SelectedValue = mintype.Mid.ToString();
            }

            for (int i = 1; i <= (int)ViewState["pagecount"]; i++)
            {
                this.DropDownList4.Items.Add(i.ToString());
            }
        }
    }

    public void BindList()
    {
        if (Request.QueryString["typeindex"] == null)
        {
            tmparry = shopitemsbll.GetAllShopItems();
        }
        else
        {
            if (Request.QueryString["typeindex"].ToString().Equals("4"))
            {
                tmparry = shopitemsbll.GetAllShopItemByType(
                    Convert.ToInt32(Request.QueryString["maxtype"].ToString()),
                    Convert.ToInt32(Request.QueryString["mintype"].ToString()),
                    Convert.ToInt32(Request.QueryString["xitype"].ToString()),
                    Request.QueryString["prodtxt"].ToString(),
                    Convert.ToInt32(Request.QueryString["typeindex"].ToString()));
            }
            if (Request.QueryString["typeindex"].ToString().Equals("3"))
            {
                tmparry = shopitemsbll.GetAllShopItemByType(
                    Convert.ToInt32(Request.QueryString["maxtype"].ToString()),
                    Convert.ToInt32(Request.QueryString["mintype"].ToString()),
                    Convert.ToInt32(Request.QueryString["xitype"].ToString()),
                    "null",
                    Convert.ToInt32(Request.QueryString["typeindex"].ToString()));
            }
            if (Request.QueryString["typeindex"].ToString().Equals("2"))
            {
                tmparry = shopitemsbll.GetAllShopItemByType(
                    Convert.ToInt32(Request.QueryString["maxtype"].ToString()),
                    Convert.ToInt32(Request.QueryString["mintype"].ToString()),
                    0,
                    "null",
                    Convert.ToInt32(Request.QueryString["typeindex"].ToString()));
            }
            if (Request.QueryString["typeindex"].ToString().Equals("1"))
            {
                tmparry = shopitemsbll.GetAllShopItemByType(
                    Convert.ToInt32(Request.QueryString["maxtype"].ToString()),
                    0,
                    0,
                    "null",
                    Convert.ToInt32(Request.QueryString["typeindex"].ToString()));
            }
            if (Request.QueryString["typeindex"].ToString().Equals("5"))
            {
                tmparry = shopitemsbll.GetAllShopItemByType(
                    Convert.ToInt32(Request.QueryString["maxtype"].ToString()),
                    Convert.ToInt32(Request.QueryString["mintype"].ToString()),
                    0,
                    Request.QueryString["prodtxt"].ToString(),
                    Convert.ToInt32(Request.QueryString["typeindex"].ToString()));
            }
            if (Request.QueryString["typeindex"].ToString().Equals("6"))
            {
                tmparry = shopitemsbll.GetAllShopItemByType(
                    Convert.ToInt32(Request.QueryString["maxtype"].ToString()),
                    0,
                    0,
                    Request.QueryString["prodtxt"].ToString(),
                    Convert.ToInt32(Request.QueryString["typeindex"].ToString()));
            }
            if (Request.QueryString["typeindex"].ToString().Equals("7"))
            {
                tmparry = shopitemsbll.GetAllShopItemByType(
                    0,
                    0,
                    0,
                    Request.QueryString["prodtxt"].ToString(),
                    Convert.ToInt32(Request.QueryString["typeindex"].ToString()));
            }
        }
        
        DataCount = tmparry.Count; //得到数据条数
        PageCount = DataCount % PageSize == 0 ? DataCount / PageSize : DataCount / PageSize + 1; //计算总页数
        ViewState["pagecount"] = PageCount;

        ArrayList arry = new ArrayList();

        _Page = (int)ViewState["page"];

        for (int i = (_Page - 1) * PageSize; i < (_Page - 1) * PageSize + PageSize; i++)
        {
            if (i < DataCount)
            {
                arry.Add(tmparry[i]);
            }
            else
            {
                break;
            }
        }
        this.ProdLists.DataSource = arry;
        this.ProdLists.DataBind();

        this.Label1.Text = ViewState["page"].ToString();
        this.Label2.Text = PageCount.ToString();

        if (_Page == PageCount)
        {
            this.Finally.Enabled = false;
            this.Next.Enabled = false;
        }
        else
        {
            this.Finally.Enabled = true;
            this.Next.Enabled = true;
        }
        if (_Page == 1)
        {
            this.First.Enabled = false;
            this.Previous.Enabled = false;
        }
        else
        {
            this.First.Enabled = true;
            this.Previous.Enabled = true;
        }

    }

    protected void First_Click(object sender, EventArgs e)
    {
        ViewState["page"] = 1;
        BindList();
        this.DropDownList4.SelectedValue = ViewState["page"].ToString();
    }
    protected void Previous_Click(object sender, EventArgs e)
    {
        ViewState["page"] = (int)ViewState["page"] - 1;
        BindList();
        this.DropDownList4.SelectedValue = ViewState["page"].ToString();
    }
    protected void Next_Click(object sender, EventArgs e)
    {
        ViewState["page"] = (int)ViewState["page"] + 1;
        BindList();
        this.DropDownList4.SelectedValue = ViewState["page"].ToString();
    }
    protected void Finally_Click(object sender, EventArgs e)
    {
        ViewState["page"] = ViewState["pagecount"];
        BindList();
        this.DropDownList4.SelectedValue = ViewState["page"].ToString();
    }
    protected void LinkButton1_Click(object sender, EventArgs e)
    {
        int siid = Convert.ToInt32(((LinkButton)sender).CommandArgument);
        Response.Redirect("ProdInfo.aspx?siid="+siid);
    }
    protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
    {
        if (this.DropDownList1.SelectedValue != "请选择商品类型")
        {
            this.DropDownList2.DataSource = prodtypebll.GetProdType(Convert.ToInt32(this.DropDownList1.SelectedValue));
            this.DropDownList2.DataTextField = "Ptype";
            this.DropDownList2.DataValueField = "Pid";
            this.DropDownList2.DataBind();
            this.DropDownList2.Items.Insert(0, "请选择商品分类");
            this.DropDownList3.Items.Clear();
            this.DropDownList3.Items.Insert(0, "请选择商品分类");
        }
        else
        {
            this.DropDownList2.Items.Clear();
            this.DropDownList2.Items.Insert(0, "请选择商品分类");
        }
    }
    protected void DropDownList2_SelectedIndexChanged(object sender, EventArgs e)
    {
        if (this.DropDownList2.SelectedValue != "请选择商品分类")
        {
            this.DropDownList3.DataSource = mintypebll.GetMinTypeByPId(Convert.ToInt32(this.DropDownList2.SelectedValue));
            this.DropDownList3.DataTextField = "Mname";
            this.DropDownList3.DataValueField = "Mid";
            this.DropDownList3.DataBind();
            this.DropDownList3.Items.Insert(0, "请选择商品分类");
        }
        else
        {
            this.DropDownList3.Items.Clear();
            this.DropDownList3.Items.Insert(0, "请选择商品分类");
        }
    }


    protected void Button1_Click(object sender, EventArgs e)
    {
        int typeindex = 0;

        if (this.DropDownList1.SelectedIndex != 0 && this.DropDownList2.SelectedIndex != 0 && this.DropDownList3.SelectedIndex != 0 && !this.txtprod.Text.Equals(""))
        {
            typeindex = 4;
            Response.Redirect("ProdList.aspx?maxtype=" + DropDownList1.SelectedValue 
                + "&mintype=" + DropDownList2.SelectedValue 
                + "&xitype=" + DropDownList3.SelectedValue
                + "&prodtxt=" + txtprod.Text
                + "&typeindex=" + typeindex);
        }
        
        if (this.DropDownList1.SelectedIndex != 0 && this.DropDownList2.SelectedIndex != 0 && this.DropDownList3.SelectedIndex != 0 && this.txtprod.Text.Equals(""))
        {
            typeindex = 3;
            Response.Redirect("ProdList.aspx?maxtype=" + DropDownList1.SelectedValue
                + "&mintype=" + DropDownList2.SelectedValue
                + "&xitype=" + DropDownList3.SelectedValue
                + "&typeindex=" + typeindex);
        }

        if (this.DropDownList1.SelectedIndex != 0 && this.DropDownList2.SelectedIndex != 0 && this.DropDownList3.SelectedIndex == 0 && this.txtprod.Text.Equals(""))
        {
            typeindex = 2;
            Response.Redirect("ProdList.aspx?maxtype=" + DropDownList1.SelectedValue
                + "&mintype=" + DropDownList2.SelectedValue
                + "&typeindex=" + typeindex);
        }

        if (this.DropDownList1.SelectedIndex != 0 && this.DropDownList2.SelectedIndex == 0 && this.DropDownList3.SelectedIndex == 0 && this.txtprod.Text.Equals(""))
        {
            typeindex = 1;
            Response.Redirect("ProdList.aspx?maxtype=" + DropDownList1.SelectedValue
                + "&typeindex=" + typeindex);
        }

        if (this.DropDownList1.SelectedIndex != 0 && this.DropDownList2.SelectedIndex != 0 && this.DropDownList3.SelectedIndex == 0 && !this.txtprod.Text.Equals(""))
        {
            typeindex = 5;
            Response.Redirect("ProdList.aspx?maxtype=" + DropDownList1.SelectedValue
                + "&mintype=" + DropDownList2.SelectedValue
                + "&prodtxt=" + txtprod.Text
                + "&typeindex=" + typeindex);
        }

        if (this.DropDownList1.SelectedIndex != 0 && this.DropDownList2.SelectedIndex == 0 && this.DropDownList3.SelectedIndex == 0 && !this.txtprod.Text.Equals(""))
        {
            typeindex = 6;
            Response.Redirect("ProdList.aspx?maxtype=" + DropDownList1.SelectedValue
                + "&prodtxt=" + txtprod.Text
                + "&typeindex=" + typeindex);
        }

        if (this.DropDownList1.SelectedIndex == 0 && this.DropDownList2.SelectedIndex == 0 && this.DropDownList3.SelectedIndex == 0 && !this.txtprod.Text.Equals(""))
        {
            typeindex = 7;
            Response.Redirect("ProdList.aspx?prodtxt=" + txtprod.Text
                + "&typeindex=" + typeindex);
        }
    }


    protected void DropDownList4_SelectedIndexChanged(object sender, EventArgs e)
    {
        ViewState["page"] = Convert.ToInt32(this.DropDownList4.SelectedValue);
        BindList();
        this.DropDownList4.SelectedValue =ViewState["page"].ToString();
    }

    public bool Getreturn(string vipprice)
    {
        bool falg=false;

        if (!vipprice.Equals("0.0000"))
        {
            falg = true;
        }

        return falg;
    }
}