Filter Multiple Gridview Display based on ChecBoxList selection In ASP.Net

Dear All,

I have multiple gridviews and I want to filter on selectedindexEvent for the checkbox list items checked. For one value it’s working fine when I select multiple values I want to display 2 grids if 2 values selected.

  <asp:CheckBoxList ID="CheckBoxList1" runat="server" AutoPostBack="True" OnSelectedIndexChanged="CheckBoxList1_SelectedIndexChanged" RepeatDirection="Horizontal">

         <asp:ListItem Value="0">Yearly</asp:ListItem>
        <asp:ListItem Value="2">Twice a year</asp:ListItem>
        <asp:ListItem Value="1">Quarterly</asp:ListItem>
        <asp:ListItem Value="3">Monthly</asp:ListItem>
    </asp:CheckBoxList>

protected void CheckBoxList1_SelectedIndexChanged(object sender, EventArgs e)
        {


            if (CheckBoxList1.SelectedValue == "0")
            {
                GridView1.Visible = true;
                GridView2.Visible = false;
                GridView3.Visible = false;
                GridView4.Visible = false;
                BindData();

            }
            else if (CheckBoxList1.SelectedValue == "2")
            {
                GridView1.Visible = false;
                GridView2.Visible = true;
                GridView3.Visible = false;
                GridView4.Visible = false;
                BindDataTwice();
            }
            else if (CheckBoxList1.SelectedValue == "1")
            {
                GridView1.Visible = false;
                GridView2.Visible = false;
                GridView3.Visible = true;
                GridView4.Visible = false;
                BindDataQuartely();
            }
            else if (CheckBoxList1.SelectedValue == "3")
            {
                GridView1.Visible = false;
                GridView2.Visible = false;
                GridView3.Visible = false;
                GridView4.Visible = true;
                BindDatamonthly();
            }
        }