Vb.net – Filtering Data on a DevExpress GridView

I am an MVC person, and have minimal experience with WebForms, but now I am having to add some functionality to a legacy VB.NET WebForms application.

So the application is using DevExpress Grids, and it displays a really long grid view on the page where one of the columns has the following:

The extra functionality that I am asked to add is a filter where the user can say:

I only want to see the rows where the on-load radio button selected is Print (or one of the other two actions).

So I went to the bottom of the grid and created the following:

My thinking was, the user can come to this drop down and selected what he or she wants to filter on for radio button actions.

DevExpress GridView Code

<dx:ASPxGridView ID="GridView1" runat="server" Theme="Office2010Blue" KeyFieldName="ID" AutoGenerateColumns="False" DataSourceID="ObjectDataSource1" Width="3200px">
    <Columns>
        <!-- Many more columns go here -->
        <dx:GridViewDataColumn Caption="" VisibleIndex="29" Name="decision" Width="150px">
            <HeaderTemplate>
                <asp:LinkButton runat="server" ID="lnkPrint" OnClick="SelectPrintAll">Print All</asp:LinkButton>
                <asp:LinkButton runat="server" ID="lnkEmail" OnClick="SelectEmailAll">Email All</asp:LinkButton>
                <asp:LinkButton runat="server" ID="lnkIgnore" OnClick="SelectIgnoreAll">Ignore All</asp:LinkButton>
            </HeaderTemplate>

            <DataItemTemplate>
                <asp:UpdatePanel runat="server" ID="upRadDecision" UpdateMode="Conditional">
                    <ContentTemplate>
                        <dx:ASPxRadioButtonList ID="radDecision" runat="server" RepeatDirection="Horizontal"
                            OnSelectedIndexChanged="StoreDecisionForRow" AutoPostBack="True" Height="15px"
                            OnDataBinding="BindDecisionRadioButton">
                            <Border BorderStyle="None"></Border>
                            <Paddings Padding="0"></Paddings>
                            <Items>
                                <dx:ListEditItem Text="Print" Value="Print" />
                                <dx:ListEditItem Text="Email" Value="Email" />
                                <dx:ListEditItem Text="Ignore" Value="Ignore" />
                            </Items>
                        </dx:ASPxRadioButtonList>
                    </ContentTemplate>
                </asp:UpdatePanel>
            </DataItemTemplate>
            <Settings HeaderFilterMode="CheckedList"></Settings>
        </dx:GridViewDataColumn>
    </Columns>

    <!-- Stylres -->
    <Styles>
        <AlternatingRow Enabled="true" />
    </Styles>

    <!-- Settings -->
    <Settings ShowFilterRow="True" ShowFilterRowMenu="true" ShowFilterBar="Auto" ShowHeaderFilterButton="true" ShowGroupPanel="True" ShowFooter="True" />
    <SettingsBehavior AllowSelectByRowClick="False" />
    <SettingsBehavior AllowSelectSingleRowOnly="False" />
    <SettingsBehavior ProcessSelectionChangedOnServer="true" />
    <SettingsPager Mode="ShowAllRecords" />

    <GroupSummary>
        <dx:ASPxSummaryItem SummaryType="Count" />
    </GroupSummary>
</dx:ASPxGridView>

I have added a click handler to my filter button, and the code is like so:

Private Sub btnFilterDefaults_Click(sender As Object, e As EventArgs) Handles btnFilterDefaults.Click
    Dim filterOn As String = ddDefaultsFilterOption.SelectedValue
    'Code Handling the Filtering.
    GridView1.filter
    For rowIndex As Integer = 0 To GridView1.VisibleRowCount - 1
        Dim datarow = GridView1.GetDataRow(rowIndex)
        Dim radDecision As ASPxRadioButtonList = CType(GridView1.FindRowCellTemplateControl(rowIndex, Nothing, "radDecision"), ASPxRadioButtonList)
        Dim decision As String = ""

        If radDecision.Value Is Nothing then Continue For

        decision = radDecision.Value.ToString()

        If decision.Contains(filterOn) Then
            datarow.?? <<<<< no option to hide row here!!! :/
        End If
    Next
End Sub

I was hoping that when I got hold of the data row, I'd be able to hide it, but there is no such option!