Getting credentials prompt when trying to upload file

[Justin]

Hello,

I am using Rad Ajax controls version 2011.2.915. Whenever a user running Windows XP and IE 7 tries to upload a file from My Documents or another network location they get prompted with a windows credential box. If they enter their credentials IE 7 locks up.

The RadAsyncUpload works fine in windows 7 IE8. If the IE 7 users try a file from their C drive, that functions correctly as well. 

I have tried to allow Anonymous Access to the website in IIS (5) but this does not make a difference. Placing these lines of Javascript before the upload control also do not help.

 <script type="text/javascript">     
   if (Telerik.Web.UI.RadAsyncUpload != null && Telerik.Web.UI.RadAsyncUpload.Modules != null) {
         Telerik.Web.UI.RadAsyncUpload.Modules.Flash.isAvailable = function() { return false; };
         Telerik.Web.UI.RadAsyncUpload.Modules.Silverlight.isAvailable = function() { return false; };
   }
</script>


How do I either disable the flash and silverlight, or how do I fix the permissions problem?

Here is how I am using the uploader in a RadGrid, once as an attachment column for inserting, and once as a control in a template column for editing.

<telerik:GridAttachmentColumn AttachmentDataField="Data" FileName="Name"
                       FileNameTextField="Name"
                       HeaderText="View Attachment" UniqueName="Data" DataTextField="Name"
                       AttachmentKeyFields="FormSequenceNr" EditFormHeaderTextFormat="">
                   </telerik:GridAttachmentColumn>
                   <telerik:GridTemplateColumn HeaderText="File"  DataField="Name" FilterControlAltText="Filter TemplateColumn column"
                       UniqueName="Name">
                       <ItemTemplate>
                           <asp:Label runat="server" ID="lblName" Text='<%# Eval("Name") %>' />
                       </ItemTemplate>
                       <EditItemTemplate>
                           <telerik:RadAsyncUpload runat="server" ID="AsyncUpload1" OnClientFileUploaded="OnClientFileUploaded"
                               OnValidatingFile="RadAsyncUpload1_ValidatingFile">
                           </telerik:RadAsyncUpload>
                       </EditItemTemplate>
                   </telerik:GridTemplateColumn>

Thanks

[Princy]

Hello Justin,

Please take a look into the following forum post which explains the same.
SOLUTION: Upload fails OR Login prompt appears when using Forms / Windows Authentication.

Hope it helps.

Thanks,
Princy.

[Justin]

I have tried both of those tips. When enabling annoymous access and then allowing the web resource, I include the location piece in my web.config and it says that it cannot find the web resource and won't use the location piece that I have added.

When I try to add the javascript that also does not work. I suspect it is because I am not placing it correctly. I have both an edit template and an attachment column that use the RadAsyncUpload, so I was placing the javascript above the RadGrid that has both of those columns. If that is not the correct placement then where in the following code block should the javascript go?

<telerik:RadGrid ID="RadGrid1" runat="server" CellSpacing="0" GridLines="None" AutoGenerateColumns="False"
            Width="97%" ShowStatusBar="True" OnItemCreated="RadGrid1_ItemCreated" OnInsertCommand="RadGrid1_InsertCommand"
            OnNeedDataSource="RadGrid1_NeedDataSource" OnDeleteCommand="RadGrid1_DeleteCommand"
            OnUpdateCommand="RadGrid1_UpdateCommand" OnItemCommand="RadGrid1_ItemCommand"
            OnPreRender="RadGrid1_PreRender" OnItemDataBound="RadGrid1_ItemDataBound">
            <ValidationSettings EnableModelValidation="False" EnableValidation="False" />
            <ClientSettings>
                <ClientEvents OnCommand="gridCommand" />
            </ClientSettings>
            <ValidationSettings EnableValidation="False" EnableModelValidation="False"></ValidationSettings>
            <ClientSettings>
                <Selecting AllowRowSelect="True" />
                <Selecting AllowRowSelect="True"></Selecting>
                <ClientEvents OnCommand="gridCommand"></ClientEvents>
            </ClientSettings>
            <MasterTableView CommandItemDisplay="Top" DataKeyNames="FormSequenceNr">
                <CommandItemSettings ExportToPdfText="Export to PDF"></CommandItemSettings>
                <RowIndicatorColumn FilterControlAltText="Filter RowIndicator column">
                    <HeaderStyle Width="20px"></HeaderStyle>
                </RowIndicatorColumn>
                <ExpandCollapseColumn FilterControlAltText="Filter ExpandColumn column">
                    <HeaderStyle Width="20px"></HeaderStyle>
                </ExpandCollapseColumn>
                <Columns>
                    <telerik:GridEditCommandColumn ButtonType="ImageButton" HeaderText="Edit Attachment">
                        <HeaderStyle Width="3%" />
                    </telerik:GridEditCommandColumn>
                    <telerik:GridAttachmentColumn AttachmentDataField="Data" FileName="Name" FileNameTextField="Name"
                        HeaderText="View Attachment" UniqueName="Data" DataTextField="Name" AttachmentKeyFields="FormSequenceNr"
                        EditFormHeaderTextFormat="">
                    </telerik:GridAttachmentColumn>
                    <telerik:GridTemplateColumn HeaderText="File" DataField="Name" FilterControlAltText="Filter TemplateColumn column"
                        UniqueName="Name">
                        <ItemTemplate>
                            <asp:Label runat="server" ID="lblName" Text='<%# Eval("Name") %>' />
                        </ItemTemplate>
                        <EditItemTemplate>
                            <telerik:RadAsyncUpload runat="server" ID="AsyncUpload1" OnClientFileUploaded="OnClientFileUploaded"
                                OnValidatingFile="RadAsyncUpload1_ValidatingFile">
                            </telerik:RadAsyncUpload>
                        </EditItemTemplate>
                    </telerik:GridTemplateColumn>
                    <telerik:GridTemplateColumn DataField="AuditUser" FilterControlAltText="Audit User"
                        HeaderText="Last Updated User" UniqueName="AuditUser">
                        <EditItemTemplate>
                            <asp:Label ID="AuditUserLabel" runat="server" Text='<%# Eval("AuditUser") %>'></asp:Label>
                        </EditItemTemplate>
                        <ItemTemplate>
                            <asp:Label ID="AuditUserLabel" runat="server" Text='<%# Eval("AuditUser") %>'></asp:Label>
                        </ItemTemplate>
                    </telerik:GridTemplateColumn>
                    <telerik:GridTemplateColumn DataField="AuditTime" FilterControlAltText="Audit Timestamp"
                        HeaderText="Last Updated Date" UniqueName="AuditTime">
                        <EditItemTemplate>
                            <asp:Label ID="AuditTimeLabel" runat="server" Text='<%# Eval("AuditTime") %>'></asp:Label>
                        </EditItemTemplate>
                        <ItemTemplate>
                            <asp:Label ID="AuditTimeLabel" runat="server" Text='<%# Eval("AuditTime") %>'></asp:Label>
                        </ItemTemplate>
                    </telerik:GridTemplateColumn>
                    <telerik:GridButtonColumn Text="Delete" CommandName="Delete" ButtonType="ImageButton"
                        FilterControlAltText="Filter column1 column" UniqueName="Delete" HeaderText="Delete Attachment">
                        <HeaderStyle Width="2%" />
                    </telerik:GridButtonColumn>
                </Columns>
                <EditFormSettings>
                </EditFormSettings>
            </MasterTableView>
            <FilterMenu EnableImageSprites="False">
            </FilterMenu>
            <HeaderContextMenu CssClass="GridContextMenu GridContextMenu_Default">
            </HeaderContextMenu>
        </telerik:RadGrid>

[Peter Filipov]

Hi Justin,

Please register from the server side, when the edit button is clicked, the javascript code which disables Silverlight and Flash plugins.

In case that you are using the latest version of our controls (Q3 2011 BETA) the DisablePlugins property is available and you can set it to true instead of registering javascript code from code-behind.

Best wishes,
Peter Filipov
the Telerik team