FileUploadField help

Hi

I have the following code which uses a FileUploadField field, how do I access the file to upload it to my server? Can I do this in my code behind file? If the control saves the file without my needing to use a code behind file how do I know where the file will be saved and can I set it's path?

Code:

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<%@ Control Language="VB" AutoEventWireup="true" CodeFile="pulsebar.ascx.vb" Inherits="pages_cms_controls_pulseBar" %>

<%@ Register Assembly="Coolite.Ext.Web" Namespace="Coolite.Ext.Web" TagPrefix="ext" %>

 <asp:SqlDataSource ID="pulseDataSource"
    Runat="server"
    EnableCaching="false"       
    ConnectionString="<%$ ConnectionStrings:HomePage %>"
    SelectCommand="SELECT * FROM Pulse WHERE deleted=0 ORDER BY publishon DESC"
    InsertCommand="INSERT INTO Pulse (URL, Image, Title, publishon, modified, deleted, published) VALUES (@URL, @Image, @Title, @publishon, GetDate(), 0, 0)"
    DeleteCommand="UPDATE Pulse SET deleted=1, modified=GetDate() WHERE PulseID=@PulseID"
    UpdateCommand="UPDATE Pulse SET publishon=@publishon, published=@published, modified=GetDate(), URL=@URL, Image=@Image, Title=@Title WHERE PulseID=@PulseID"
    >
    <InsertParameters>
        <asp:Parameter Name="URL" />
        <asp:Parameter Name="Image" />
        <asp:Parameter Name="Title" />
    </InsertParameters>
    <DeleteParameters>
        <asp:Parameter Name="PulseID" />
    </DeleteParameters>
    <UpdateParameters>
        <asp:Parameter Name="PulseID" />
        <asp:Parameter Name="Title" />
        <asp:Parameter Name="URL" />
        <asp:Parameter Name="Image" />
        <asp:Parameter Name="published" Type="Boolean" />                                                               
    </UpdateParameters>
</asp:SqlDataSource>
<ext:Store ID="pulseStore" runat="server" DataSourceID="pulseDataSource">
    <Reader>
        <ext:JsonReader ReaderID="PulseID">
            <Fields>
                <ext:RecordField Name="URL" />
                <ext:RecordField Name="Title" />
                <ext:RecordField Name="Image" />
                <ext:RecordField Name="published" Type="Boolean" />
                <ext:RecordField Name="publishon" Type="Date" />
            </Fields>
        </ext:JsonReader>
    </Reader>
</ext:Store>
      <asp:Literal runat="server" ID="debug" />
       
<ext:GridPanel ID="pulseGridPanel"  runat="server" StoreID="pulseStore" Width="985" Height="470" BodyBorder="false" >
    <TopBar>
        <ext:Toolbar ID="Toolbar2" runat="server">
            <Items>
                <ext:Button ID="Button4" runat="server" Text="Add" Icon="Add">
                    <Listeners>
                        <Click Handler="#{pulseGridPanel}.insertRecord();" />
                    </Listeners>
                </ext:Button>
                <ext:Button ID="Button5" runat="server" Text="Save" Icon="DatabaseSave">
                    <Listeners>
                        <Click Handler="#{pulseGridPanel}.save();" />
                    </Listeners>
                </ext:Button>
                <ext:Button ID="Button1" runat="server" Text="Reload" Icon="Reload">
                    <Listeners>
                        <Click Handler="#{pulseGridPanel}.reload();" />
                    </Listeners>
                </ext:Button>                                                         
            </Items>
        </ext:Toolbar>
    </TopBar>
    <ColumnModel>
        <Columns>
            <ext:CommandColumn Width="30">
                <Commands>
                    <ext:GridCommand Icon="Delete" CommandName="Remove">
                        <ToolTip Text="Remove" />
                    </ext:GridCommand>
                </Commands>
            </ext:CommandColumn>
            <ext:Column Header="Title" DataIndex="Title" Width="250">
                <Editor>
                    <ext:TextField ID="TextField1" runat="server"></ext:TextField>
                </Editor>
            </ext:Column>                               
            <ext:Column Header="Image" DataIndex="Image" Width="150">
                <Editor>
                  <ext:FileUploadField ID="ImageUpload" DataIndex="Image" ButtonText="Browse" runat="server" ButtonOnly="true" />
                </Editor>
            </ext:Column>
            <ext:Column Header="URL" DataIndex="URL" Width="350">
                <Editor>
                    <ext:TextField ID="TextField5" runat="server"></ext:TextField>
                </Editor>
            </ext:Column>
            <ext:CheckColumn ColumnID="published" Header="Published" Align="Center" DataIndex="published" Width="90" Editable="true" />
           
            <ext:Column Header="Publish On" DataIndex="publishon">
                <Renderer Fn="Ext.util.Format.dateRenderer('d-M-Y')" />
                <Editor>
                    <ext:DateField ID="DateField1" runat="server" Format="dd-MMM-Y"></ext:DateField>
                </Editor>
            </ext:Column> 
        </Columns>
    </ColumnModel>
   
    <SelectionModel>
        <ext:RowSelectionModel ID="RowSelectionModel2" runat="server" SingleSelect="true">
        </ext:RowSelectionModel>
    </SelectionModel>
    <Listeners>
        <Command Handler="#{pulseGridPanel}_handleDelete();" />
    </Listeners>
    <LoadMask ShowMask="true" />                         
</ext:GridPanel>


<script type="text/javascript">
   
    function <%= pulseGridPanel.ClientID %>_handleDelete () {
        Ext.Msg.show({
          title:'Delete?',
          msg: 'Are you sure you want to delete?',
          buttons: Ext.Msg.YESNO,
          fn: <%= pulseGridPanel.ClientID %>_processDelete,
          icon: Ext.MessageBox.QUESTION
        });
    }
   
    function <%= pulseGridPanel.ClientID %>_processDelete (response) {
        if (response == 'yes') {
            <%= pulseGridPanel.ClientID %>.deleteSelected();
            <%= pulseGridPanel.ClientID %>.save();
        }
    }
   
</script>

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