在GridView中进行排序

      点击列头，可以将列字段按照升降序进行排序。

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" CellPadding="4"
                ForeColor="#333333" GridLines="None" AllowSorting="True" OnSorting="GridView1_Sorting">
                <FooterStyle BackColor="#990000" Font-Bold="True" ForeColor="White" />
                <Columns>
                    <asp:BoundField DataField="UserID" HeaderText="用户ID" ReadOnly="True" SortExpression="UserID"/>
                    <asp:BoundField DataField="User_Nm" HeaderText="用户姓名" SortExpression="User_Nm" />
                    <asp:BoundField DataField="User_Sex" HeaderText="性别" SortExpression="User_Sex"/>
                    <asp:BoundField DataField="User_Address" HeaderText="家庭住址" SortExpression="User_Address" />
                    <asp:CommandField HeaderText="选择" ShowSelectButton="True" />
                    <asp:CommandField HeaderText="编辑" ShowEditButton="True" />
                    <asp:CommandField HeaderText="删除" ShowDeleteButton="True" />
                </Columns>
                <RowStyle ForeColor="#008066" />
                <SelectedRowStyle BackColor="#669999" Font-Bold="True" ForeColor="White" />
                <PagerStyle BackColor="#006699" Font-Bold="True" ForeColor="White" />
                <HeaderStyle BackColor="#006699" Font-Bold="True" ForeColor="White" />
            </asp:GridView>

      

using System;
using System.Data;
using System.Data.SqlClient;
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;

public partial class Default2 : System.Web.UI.Page
{
    SqlConnection sqlcon;
    string strCon = "Data Source=.\\SQL2005;DataBase=Users;uid=sa;pwd=123";
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            ViewState["SortOrder"] = "User_Nm";
            ViewState["OrderDire"] = "ASC";
            bind();
        }
    }

    public void bind()
    {
        string sqlstr = "SELECT TOP 10 * from Users";
        sqlcon = new SqlConnection (strCon );
        SqlDataAdapter myda = new SqlDataAdapter (sqlstr ,sqlcon );

        DataSet myds = new DataSet ();
        sqlcon .Open ();

        myda.Fill(myds, "Us");
        DataView view = myds.Tables["Us"].DefaultView;
        string sort = (string)ViewState["SortOrder"] + " " + (string)ViewState["OrderDire"];
        view.Sort = sort;
        GridView1.DataSource = view;
        GridView1.DataBind();
        sqlcon.Close();

    }
protected void  GridView1_Sorting(object sender, GridViewSortEventArgs e)
{
    string sPage = e.SortExpression ;
    if (ViewState["SortOrder"].ToString() == sPage)
    {
        if (ViewState["OrderDire"].ToString() == "DESC")
        {
            ViewState["OrderDire"] = "ASC";
        }
        else
        {
            ViewState["OrderDire"] = "DESC";
        }
    }
  
    bind();
}
}