025. asp.net中GridView的排序和过滤

时间：2022-04-12 14:51:26

前台HTML代码:

<%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head id="Head1" runat="server">

    <title>无标题页</title>

</head>

<body>

    <form id="form1" runat="server">

    <div>

     <table class="style1">

            <tr>

                <td>

                    原始排序：</td>

            </tr>

            <tr>

                <td>

                    <asp:GridView ID="gv1" runat="server" AutoGenerateColumns="False" Width="306px"

                        CellPadding="4" ForeColor="#333333" GridLines="None" style="font-size: small">

                        <RowStyle BackColor="#F7F6F3" ForeColor="#333333" />

                        <Columns>

                            <asp:BoundField DataField="cardNo" HeaderText="卡号" />

                            <asp:BoundField DataField="cardBound" HeaderText="内卡号" />

                            <asp:BoundField DataField="name" HeaderText="姓名" />

                            <asp:BoundField DataField="mobileID" HeaderText="机器码" />

                        </Columns>

                        <FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />

                        <PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />

                        <SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />

                        <HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />

                        <EditRowStyle BackColor="#999999" />

                        <AlternatingRowStyle BackColor="White" ForeColor="#284775" />

                    </asp:GridView>

                </td>

            </tr>

            <tr>

                <td>

                    按内卡号排序：</td>

            </tr>

            <tr>

                <td>

                    <asp:GridView ID="gv2" runat="server" AutoGenerateColumns="False" Width="306px"

                        CellPadding="4" ForeColor="#333333" GridLines="None" style="font-size: small">

                        <RowStyle BackColor="#F7F6F3" ForeColor="#333333" />

                        <Columns>

                            <asp:BoundField DataField="cardNo" HeaderText="卡号" />

                            <asp:BoundField DataField="cardBound" HeaderText="内卡号" />

                            <asp:BoundField DataField="name" HeaderText="姓名" />

                            <asp:BoundField DataField="mobileID" HeaderText="机器码" />

                        </Columns>

                        <FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />

                        <PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />

                        <SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />

                        <HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />

                        <EditRowStyle BackColor="#999999" />

                        <AlternatingRowStyle BackColor="White" ForeColor="#284775" />

                    </asp:GridView>

                </td>

            </tr>

            <tr>

                <td>

                    按机器码排序：</td>

            </tr>

            <tr>

                <td>

                    <asp:GridView ID="gv3" runat="server" AutoGenerateColumns="False" Width="306px"

                        CellPadding="4" ForeColor="#333333" GridLines="None" style="font-size: small">

                        <RowStyle BackColor="#F7F6F3" ForeColor="#333333" />

                        <Columns>

                            <asp:BoundField DataField="cardNo" HeaderText="卡号" />

                            <asp:BoundField DataField="cardBound" HeaderText="内卡号" />

                            <asp:BoundField DataField="name" HeaderText="姓名" />

                            <asp:BoundField DataField="mobileID" HeaderText="机器码" />

                        </Columns>

                        <FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />

                        <PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />

                        <SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />

                        <HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />

                        <EditRowStyle BackColor="#999999" />

                        <AlternatingRowStyle BackColor="White" ForeColor="#284775" />

                    </asp:GridView>

                </td>

            </tr>

        </table>

  <asp:DropDownList ID="dlFilter" runat="server" AutoPostBack="True" DataTextFormatString="cardNo:{0}" OnSelectedIndexChanged="dlFilter_SelectedIndexChanged" Width="150px" AppendDataBoundItems="True">

   <asp:ListItem Value="-1">选择分类编号</asp:ListItem>

  </asp:DropDownList>

  <asp:Label ID="lbData" runat="server"></asp:Label>

    </div>

    </form>

</body>

</html>

后台CS文件代码:

using System;

using System.Configuration;

using System.Data;

using System.Linq;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.HtmlControls;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Xml.Linq;

using System.Data.SqlClient;

using System.Text;

public partial class _Default : System.Web.UI.Page

{

    protected void Page_Load(object sender, EventArgs e)

    {

        if (!Page.IsPostBack)

        {

            //排序

            string conStr = "server=.;database=TYW;uid=sa;pwd=123.456;";

            SqlConnection conn = new SqlConnection(conStr);//创建连接对象

            if (conn.State.Equals(ConnectionState.Closed))

                conn.Open();//显式地打开数据库连接

            string strsql = "select top 5 cardNo,cardBound,name,mobileID from card";

            SqlDataAdapter da = new SqlDataAdapter(strsql, conn);//创建数据适配器

            DataSet ds = new DataSet();//创建数据集

            da.Fill(ds, "card");//填充数据集   原始排序

            gv1.DataSource = ds.Tables["card"];

            DataView view2 = new DataView(ds.Tables["card"]);

            view2.Sort = "cardBound";//设置排序表达式

            gv2.DataSource = view2;//将排序后的DataView视图中数据绑定到GridView控件中

            DataView view3 = new DataView(ds.Tables["card"]);

            view3.Sort = "mobileID";//设置排序表达式

            gv3.DataSource = view3;//将排序后的DataView视图中数据绑定到GridView控件中

            Page.DataBind();//为整个页面中控件绑定数据

            conn.Close();//关闭数据库连接

            ///显示UrlID的数据

            ReadUrlIDData();

            ///从Session中获取缓存的数据

            if (Session["cardData"] == null)

            {   ///如果没有缓存数据，则添加新的数据到缓存中

                Session["cardData"] = ReadData();

                ///显示数据

                ShowData(((DataTable)Session["cardData"]).DefaultView);

            }

        }

    }

    private void ReadUrlIDData()

    {   ///创建数据库链接

        string conString = "server=.;database=TYW;uid=sa;pwd=123.456;";

        SqlConnection myCon = new SqlConnection(conString);

        ///创建执行命令

        SqlCommand myCmd = new SqlCommand("SELECT DISTINCT cardNo FROM card ORDER BY cardNo", myCon);

        ///定义dr

        SqlDataReader dr = null;

        try

        {   ///打开数据库的链接

            myCon.Open();

            ///从数据库读取数据

            dr = myCmd.ExecuteReader();

            ///设置下拉框的数据

            dlFilter.DataSource = dr;

            dlFilter.DataTextField = "cardNo";

            dlFilter.DataValueField = "cardNo";

            dlFilter.DataBind();

            ///关闭数据读取器

            dr.Close();

        }

        catch (Exception ex)

        {

            Response.Write(ex.Message);

        }

        finally

        {   ///关闭数据库的链接

            myCon.Close();

        }

    }

    private DataTable ReadData()

    {   ///创建数据库链接

        string conString = "server=.;database=TYW;uid=sa;pwd=123.456;";

        SqlConnection myCon = new SqlConnection(conString);

        ///创建执行命令

        SqlCommand myCmd = new SqlCommand("SELECT * FROM card", myCon);

        ///定义dr

        SqlDataReader dr = null;

        try

        {   ///打开数据库的链接

            myCon.Open();

            ///从数据库读取数据

            dr = myCmd.ExecuteReader(CommandBehavior.CloseConnection);

            ///创建DataTabel，并显示DataTable中的数据

            return (CreateDataTableData(dr));

        }

        catch (Exception ex)

        {

            Response.Write(ex.Message);

        }

        finally

        {   ///关闭数据库的链接

            myCon.Close();

        }

        return (DataTable)null;

    }

    private DataTable CreateDataTableData(SqlDataReader dr)

    {

        DataTable dt = new DataTable();

        ///创dt的列

        foreach (DataRow row in dr.GetSchemaTable().Rows)

        {   ///需要列的名称和数据类型

            dt.Columns.Add(new DataColumn(row["ColumnName"].ToString(), (Type)row["DataType"]));

        }

        ///读取数据

        while (dr.Read())

        {   ///创建一个新行

            DataRow newrow = dt.NewRow();

            foreach (DataRow row in dr.GetSchemaTable().Rows)

            {   ///读取数据

                newrow[row["ColumnName"].ToString()] = dr[row["ColumnName"].ToString()];

            }

            ///添加新行

            dt.Rows.Add(newrow);

        }

        ///关闭读取器

        dr.Close();

        return (dt);

    }

    private void ShowData(DataView dv)

    {

        StringBuilder sb = new StringBuilder();

        ///添加表头

        sb.Append("<table border=1>");

        ///添加表的标题栏

        sb.Append("<tr>");

        for (int i = ; i < dv.Table.Columns.Count; i++)

        {

            sb.Append("<td bgcolor=gray>");

            sb.Append(dv.Table.Columns[i].ColumnName);

            sb.Append("</td>");

        }

        sb.Append("</tr>");

        ///添加数据

        foreach (DataRowView rowview in dv)

        {   ///添加一行数据

            DataRow row = rowview.Row;

            sb.Append("<tr>");

            for (int i = ; i < row.ItemArray.Length; i++)

            {   ///添加数据的列

                sb.Append("<td>");

                sb.Append(row.ItemArray[i].ToString());

                sb.Append("</td>");

            }

            sb.Append("</tr>");

        }

        ///添加结束符号

        sb.Append("</table");

        sb.Append("<hr />");

        ///输出字符串

        lbData.Text = sb.ToString();

    }

    protected void dlFilter_SelectedIndexChanged(object sender, EventArgs e)

    {

        DataTable dt;

        ///从Session中获取缓存的数据, 将整个数据都缓存在Session中了

        if (Session["cardData"] == null)

        {   ///如果没有缓存数据，则添加新的数据到缓存中

            dt = ReadData();

            Session["cardData"] = dt;

        }

        else

        {

            dt = (DataTable)Session["cardData"];

        }

        if (dlFilter.SelectedItem.Value == "-1")

        {   ///设置过滤表达式

            dt.DefaultView.RowFilter = "";

            ///显示数据

            ShowData(dt.DefaultView);

        }

        else

        {   ///设置过滤表达式

            DataView dv = dt.DefaultView;

            dv.RowFilter = "cardNo ='" + dlFilter.SelectedItem.Value + "'";

            ///显示数据

            ShowData(dv);

        }

    }

}

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