Hello,

I'm using Ajax 1.0.  I have a very basic file upload page that uses a Master page (master page has the ScriptManager declared).  I just want to do the basic "spinning gif" when the Upload button is pressed.  My page works fine without ajax.  However, with the ajax code I get a popup that says "Parameter is not valid" when I press the "Upload" button.  I've searched everywhere and tried a number of different ways, but still no luck.  I would greatly appreciate any help or insight!  :)   Also, all my other Ajax extenders (ie, CalendarExtender, etc) work just fine.

Thanks, Jason

<asp:ScriptManager ID="ScriptManager1" EnablePartialRendering="true" runat="server" />

File Upload page:

        <asp:View ID="uploadimageview" runat="server">
            <asp:SqlDataSource ID="SqlDataSource3" runat="server" SelectCommand="SELECT albumid, albumName FROM Albums"
                ConnectionString="<%$ ConnectionStrings:ClubSiteDB %>" OnSelecting="SetOwner"></asp:SqlDataSource>
            <asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional">
                <Triggers>
                    <asp:AsyncPostBackTrigger ControlID="UploadBtn" EventName="Click" />
                </Triggers>
                <ContentTemplate>
                    <table class="selectedPanel" width="100%">
                        <tr>
                            <td colspan="2">
                                Select a file using the browse button, enter a caption title and click Upload Image.
                                <br />
                                <asp:Label ID="ErrorLabel" runat="server" />
                            </td>
                        </tr>
                        <tr>
                            <td colspan="2">
                                &nbsp;</td>
                        </tr>
                        <tr>
                            <td style="height: 26px">
                                Album to upload to:</td>
                            <td style="height: 26px">
                                <asp:DropDownList ID="AlbumList2" runat="server" DataSourceID="SqlDataSource3" DataTextField="albumName"
                                    DataValueField="albumid">
                                </asp:DropDownList></td>
                        </tr>
                        <tr>
                            <td>
                                File:</td>
                            <td>
                                <asp:FileUpload ID="FileUpload1" runat="server" /></td>
                        </tr>
                        <tr>
                            <td>
                                Image title:</td>
                            <td>
                                <asp:TextBox ID="Title" runat="server" />
                            </td>
                        </tr>
                        <tr>
                            <td>
                                &nbsp;</td>
                            <td>
                            </td>
                        </tr>
                        <tr>
                            <td colspan="2">
                                <p>
                                </p>
                                <asp:Button ID="UploadBtn" runat="server" Text="Upload Image" OnClick="UploadBtn_Click" />
                                <asp:Button ID="Cancel2" runat="server" Text="Cancel upload" OnClick="Cancel_Click" />
                            </td>
                        </tr>
                        <tr>
                            <td colspan="2">
                                &nbsp;</td>
                        </tr>
                    </table>
                    <asp:UpdateProgress ID="UpdateProgress1" runat="server">
                        <ProgressTemplate>
                            Updating...</ProgressTemplate>
                    </asp:UpdateProgress>
                </ContentTemplate>
            </asp:UpdatePanel>
        </asp:View> " OnSelecting="SetOwner">

Problem was that FileUpload1.FileContent was being lost by the UpdatePanel.

Jason

 The error could be caused by having the FileUpload control in the UpdatePanel.

 This post links to some more information: http://forums.asp.net/t/1107788.aspx