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asp.net中GridView排序的手动实现

2015-01-06 17:52 399 查看
GridView自带了数据排序功能。在设计视图下，只能对GridView的排序数据列和排序方向进行静态设置。如果要自己实现排序功能，在后台程序中，则需要用Attributes方式对GridView的这两个属性进行动态设置。

示例如下：

（前台）




<%

@
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
runat="server">


    <title>无标题页</title>



</head>



<body>



    <form
id="form1" runat="server">


    <div>



        <asp:GridView
ID="GridView1" runat="server" AutoGenerateColumns="False" CellPadding="4" ForeColor="#333333" GridLines="None" AllowSorting="True" OnSorting="GridView1_Sorting">



            <FooterStyle
BackColor="#507CD1" Font-Bold="True" ForeColor="White" />


            <RowStyle
BackColor="#EFF3FB" />


            <Columns>



                <asp:BoundField
DataField="id" HeaderText="ID" SortExpression="id" />


                <asp:BoundField
DataField="name" HeaderText="NAME" SortExpression="name" />


                <asp:BoundField
DataField="age" HeaderText="AGE" SortExpression="age" />


            </Columns>



            <PagerStyle
BackColor="#2461BF" ForeColor="White" HorizontalAlign="Center" />


            <SelectedRowStyle
BackColor="#D1DDF1" Font-Bold="True" ForeColor="#333333" />


            <HeaderStyle
BackColor="#507CD1" Font-Bold="True" ForeColor="White" />


            <EditRowStyle
BackColor="#2461BF" />


            <AlternatingRowStyle
BackColor="White" />


        </asp:GridView>



    </div>



    </form>



</body>



</html>





前台注意点：

需要对GridView启用AllowSorting、设置OnSorting事件，对需要排序的列设定SortExpression属性。

（后台）

using System;

using System.Data;

using System.Configuration;

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;

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

{

    protected void Page_Load(object sender, EventArgs e)

    {

        if (!IsPostBack)

        {

            // 设定初始排序参数值

            // 错误的属性设置方法：SortExpression、SortDirection均是GridView只读属性，无法直接赋值。

            //this.GridView1.SortExpression = "id";

            //this.GridView1.SortDirection = "ASC";

            // 正确的属性设置方法

            this.GridView1.Attributes.Add("SortExpression", "id");

            this.GridView1.Attributes.Add("SortDirection", "ASC");

            // 绑定数据源到GridView

            this.BindGridView();

        }

    }

    /// <summary>

    /// GridView排序事件

    /// </summary>

    protected void GridView1_Sorting(object sender, GridViewSortEventArgs e)

    {

        // 从事件参数获取排序数据列

        string sortExpression = e.SortExpression.ToString();

        // 假定为排序方向为“顺序”

        string sortDirection = "ASC";

        // “ASC”与事件参数获取到的排序方向进行比较，进行GridView排序方向参数的修改

        if (sortExpression == this.GridView1.Attributes["SortExpression"])

        {

            //获得下一次的排序状态

            sortDirection = (this.GridView1.Attributes["SortDirection"].ToString() == sortDirection ? "DESC" : "ASC");

        }

        // 重新设定GridView排序数据列及排序方向

        this.GridView1.Attributes["SortExpression"] = sortExpression;

        this.GridView1.Attributes["SortDirection"] = sortDirection;

        this.BindGridView();

    }

    /// <summary>

    /// 绑定到GridView

    /// </summary>

    private void BindGridView()

    {

        // 获取GridView排序数据列及排序方向

        string sortExpression = this.GridView1.Attributes["SortExpression"];

        string sortDirection = this.GridView1.Attributes["SortDirection"];

        // 调用业务数据获取方法

        DataTable dtBind = this.getDB();

        // 根据GridView排序数据列及排序方向设置显示的默认数据视图

        if ((!string.IsNullOrEmpty(sortExpression)) && (!string.IsNullOrEmpty(sortDirection)))

        {

            dtBind.DefaultView.Sort = string.Format("{0} {1}", sortExpression, sortDirection);

        }

        // GridView绑定并显示数据

        this.GridView1.DataSource = dtBind;

        this.GridView1.DataBind();

    }

    /// <summary>

    /// 获取数据源的方法

    /// </summary>

    /// <returns>数据源</returns>

    private DataTable getDB()

    {

        DataTable dt = new DataTable();

        dt.Columns.Add("id");

        dt.Columns.Add("name");

        dt.Columns.Add("age");

        dt.Rows.Add(new object[] { "000001", "hekui", "26" });

        dt.Rows.Add(new object[] { "000002", "zhangyu", "26" });

        dt.Rows.Add(new object[] { "000003", "zhukundian", "27" });

        dt.Rows.Add(new object[] { "000004", "liyang", "25" });

        dt.Rows.Add(new object[] { "000005", "caili", "27" });

        return dt;

    }

}

 

        原文转载自http://www.360doc.com/content/15/0106/17/21392682_438677308.shtml
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标签：  asp.net gridview
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