请教GridView分页的问题

Question

]小弟在用gridview绑定数据，自动分页的时候不管点第几页都是显示第一页，不知道错在哪里了，请高手指点一下：
属性代码
<asp:GridView ID="GridView1" runat="server" AllowPaging="True" CellPadding="4" 
            ForeColor="#333333" GridLines="None" onpageindexchanged="PageIndexChanged" 
            onpageindexchanging="PageIndexChanging">
            <FooterStyle BackColor="#1C5E55" Font-Bold="True" ForeColor="White" />
            <RowStyle BackColor="#E3EAEB" />
            <PagerStyle BackColor="#666666" ForeColor="White" HorizontalAlign="Center" />
            <SelectedRowStyle BackColor="#C5BBAF" Font-Bold="True" ForeColor="#333333" />
            <HeaderStyle BackColor="#1C5E55" Font-Bold="True" ForeColor="White" />
            <EditRowStyle BackColor="#7C6F57" />
            <AlternatingRowStyle BackColor="White" />
        </asp:GridView>
-----------------
操作代码：
protected SqlConnection conn = new SqlConnection();
    protected SqlDataAdapter sda = new SqlDataAdapter();
    protected  DataSet ds=new DataSet();    protected void Page_Load(object sender, EventArgs e)
    {
        
        if (IsPostBack)
        {
            bind();
        }
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
      bind();
    }
    protected void bind()
    {
        string str_conn = "server=(local);database=web;user id=sa;password=sasasa";
        conn.ConnectionString = str_conn;
        string fun = "select * from Fare";
        SqlCommand fun_cmd = new SqlCommand(fun, conn);
        sda.SelectCommand = fun_cmd;
        sda.Fill(ds, "Fare");
        GridView1.DataSource = ds.Tables["Fare"];
        GridView1.DataBind();
    }
    protected void PageIndexChanged(object sender, EventArgs e)
    {
        bind();
    }    protected void PageIndexChanging(object sender, GridViewPageEventArgs e)
    {    }

Answer 1

protected void gv_PageIndexChanging(object sender, GridViewPageEventArgs e)
        {
            gv.PageIndex = e.NewPageIndex;//指定下当前页码嘛
        }

Answer 2

protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
    {
        GridView1.PageIndex = e.NewPageIndex;
        Gvbind();
    }

Answer 3

正解， 你可以调试 时候看下 e.NewPageIndex;GridView1.PageIndex 的值 就理解了