How do I Filter a grid view based on radio button selected Index

protected void rbnSearchby_SelectedIndexChanged(object sender, EventArgs e)
    {
        string Filter = RbnFilter.SelectedValue.ToString();
        if (RbnFilter.SelectedValue == "10")
        {
            Filter = "select a.SID as ProfileID,a.StaffName as Name,b.Designation,a.Staffqualification as Qualification,a.Uploadphoto as ImageUrl,case a.Status when '1' then 'Active' when '2' then 'InActive' end as Status,convert(varchar(12),a.date,101) as Date from Adding_New_Staff a join Dental_Designation b on a.StaffDesignation=b.Did order by a.sid";
            RadiobuttonList(Filter);
        }
        else if (RbnFilter.SelectedValue == "11")
        {
            Filter = "select a.SID as ProfileID,a.StaffName as Name,b.Designation,a.Staffqualification as Qualification,a.Uploadphoto as ImageUrl,case a.Status when '1' then 'Active' when '2' then 'InActive' end as Status,convert(varchar(12),a.date,101) as Date from Adding_New_Staff a join Dental_Designation b on a.StaffDesignation=b.Did order by a.sid";
            RadiobuttonList(Filter);

        }

        else if (RbnFilter.SelectedValue == "12")
        {
            Filter = "select a.SID as ProfileID,a.StaffName as Name,b.Designation,a.Staffqualification as Qualification,a.Uploadphoto as ImageUrl,case a.Status when '1' then 'Active' when '2' then 'InActive' end as Status,convert(varchar(12),a.date,101) as Date from Adding_New_Staff a join Dental_Designation b on a.StaffDesignation=b.Did order by a.sid";
            RadiobuttonList(Filter);
        }


        else if (RbnFilter.SelectedValue == "13")
        {
            Filter = "select a.SID as ProfileID,a.StaffName as Name,b.Designation,a.Staffqualification as Qualification,a.Uploadphoto as ImageUrl,case a.Status when '1' then 'Active' when '2' then 'InActive' end as Status,convert(varchar(12),a.date,101) as Date from Adding_New_Staff a join Dental_Designation b on a.StaffDesignation=b.Did order by a.sid";
            RadiobuttonList(Filter);
        }
        else if (RbnFilter.SelectedValue == "14")
        {
            Filter = "select a.SID as ProfileID,a.StaffName as Name,b.Designation,a.Staffqualification as Qualification,a.Uploadphoto as ImageUrl,case a.Status when '1' then 'Active' when '2' then 'InActive' end as Status,convert(varchar(12),a.date,101) as Date from Adding_New_Staff a join Dental_Designation b on a.StaffDesignation=b.Did order by a.sid";
            RadiobuttonList(Filter);
        }

[<span style="font-size: 14px; font-weight: normal;">
                <asp:RadioButtonList ID="RbnFilter" runat="server" 
                RepeatDirection="Horizontal" OnSelectedIndexChanged="rbnSearchby_SelectedIndexChanged"
                    RepeatLayout="Flow" AutoPostBack="True">
                    <asp:ListItem Text="All" Value="10" Selected="true" />
                    <asp:ListItem Text="Doctors" Value="11" />
                    <asp:ListItem Text="Dental Hygienist & Assistants" Value="12" />
                    <asp:ListItem Text="Nurses" Value="13" />
                    <asp:ListItem Text="Front Office" Value="14" />
                </asp:RadioButtonList>
            </span>]
        </h1>
    </div>
    <div>
    <asp:GridView ID="GridProfile" runat="server" AutoGenerateColumns="False" 
            Width="100%" ShowHeaderWhenEmpty="True" class="Grid">
    <Columns>
    <asp:TemplateField HeaderText="Profile ID">
    <ItemTemplate>
        <asp:Label ID="lblProfileID" runat="server" Text='<%# Eval("ProfileID") %>'></asp:Label>
    </ItemTemplate>
    </asp:TemplateField>
    <asp:TemplateField HeaderText="Name">
    <ItemTemplate>
        <asp:Label ID="lblName" runat="server" Text='<%# Eval("Name") %>'></asp:Label>
    </ItemTemplate>
    </asp:TemplateField>
    <asp:TemplateField HeaderText="Designation">
    <ItemTemplate>
        <asp:Label ID="lblDesignation" runat="server" Text='<%# Eval("Designation") %>'></asp:Label>
    </ItemTemplate>
    </asp:TemplateField>
    <asp:TemplateField HeaderText="Qualification">
    <ItemTemplate>
        <asp:Label ID="lblQualification" runat="server" Text='<%# Eval("Qualification") %>'></asp:Label>
    </ItemTemplate>
    </asp:TemplateField>
    <asp:TemplateField HeaderText="Image Url">
    <ItemTemplate>
        <asp:Label ID="lblImageUrl" runat="server" Text='<%# Eval("ImageUrl") %>'></asp:Label>
    </ItemTemplate>
    </asp:TemplateField>
   <asp:TemplateField HeaderText="Status">
    <ItemTemplate>
        <asp:Label ID="lblStatus" runat="server" Text='<%# Eval("Status") %>'></asp:Label>
    </ItemTemplate>
    </asp:TemplateField>
     <asp:TemplateField HeaderText="Date">
    <ItemTemplate>
        <asp:Label ID="lbldate" runat="server" Text='<%# Eval("Date") %>'></asp:Label>
    </ItemTemplate>
    </asp:TemplateField>

    </Columns>
    </asp:GridView>