Hello, I am about to create a simple module, that loads photos from Picasa, showing them as thumbnails, and on click, you are getting full-size picture.

I  am recieving image's urls and I am binding them to DataList.

The thumbnails are displaying ok, but instead of big images, I get empty containers with red cross. When I right-click on such container , then go to properties, I see the correct image url. When I copy that url and paste it in adress bar in browser, the image is displayoing with no problems.

In the settings for the page that contains my module, the cache time is 0.

In page load, I try to clear cache like this:

 Response.Cache.SetCacheability(HttpCacheability.NoCache);

but it does not help.

Any suggestions?

Thank you.

I have created simple, empty web project to test my gallery. It's working there with no problems.

This is my DataList:

 <asp:Panel ID="panelFilter" runat="server">
    <table width="100%">
        <tr>
            <td>
                <dnn:Label ID="lblAlbum" runat="server" Text="Album" Suffix=":" />
            </td>
            <td>
                <asp:DropDownList ID="cboAlbum" runat="server">
                </asp:DropDownList>
            </td>
        </tr>
        <tr>
            <td colspan="2">
                <asp:LinkButton ID="linkShowPhotos" runat="server" OnClick="linkShowPhotos_Click"
                    Text="Show Photos" />
            </td>
        </tr>
    </table>
</asp:Panel>
<asp:Panel ID="panelImages" runat="server">
    <asp:DataList ID="listPhotos" runat="server" OnItemCommand="listPhotos_ItemCommand" RepeatColumns="5"
        RepeatDirection="Horizontal" RepeatLayout="Table">
        <ItemTemplate>
            <asp:ImageButton ID="imgThumbnail" runat="server" ImageUrl='<%# DataBinder.Eval(Container.DataItem, "PhotoThumbnailUrl")%>'
            CommandName="click" CommandArgument='<%# DataBinder.Eval(Container.DataItem, "PhotoUrl")%>' />
        </ItemTemplate>
    </asp:DataList>
</asp:Panel>
<asp:Panel ID="panelImageLarge" runat="server" Visible="false" Height="480" Width="640">
    <asp:LinkButton ID="linkClose" runat="server" Text="Close" OnClick="linkClose_Click" />
    <hr />
    <asp:Image ID="imgLarge" runat="server" AlternateText="" />
</asp:Panel>

and code behind:

        #region Events

        protected void Page_Load(object sender, System.EventArgs e)
        {
            // disable cache to avoid image load problem
            Response.Cache.SetCacheability(HttpCacheability.NoCache);

            try
            {
                BindData();
            }
            catch (Exception exc) //Module failed to load
            {
                Exceptions.ProcessModuleLoadException(this, exc);
            }

        }

        protected void linkShowPhotos_Click(object sender, System.EventArgs e)
        {
            ShowPhotos(cboAlbum.SelectedItem.Value);
        }

        protected void listPhotos_ItemCommand(object sender, DataListCommandEventArgs e)
        {
            if (e.CommandName.ToLower() == "click")
            {
                this.imgLarge.ImageUrl = e.CommandArgument.ToString();
                this.panelFilter.Visible = false;
                this.panelImages.Visible = false;
                this.panelImageLarge.Visible = true;
            }
        }

        protected void linkClose_Click(object sender, System.EventArgs e)
        {
       
        }

        #endregion

        #region Methods

        protected void BindData()
        {
            // get controller
            PicasaGalleryController galleryController = new PicasaGalleryController();

            // get list of albums
            List<PicasaAlbumInfo> listPicasaAlbums = galleryController.GetAlbumsList();

            // bind DropDown of albums
            foreach (PicasaAlbumInfo picasaAlbumInfo in listPicasaAlbums)
            {
                ListItem listItem = new ListItem(picasaAlbumInfo.AlbumTitle, picasaAlbumInfo.AlbumID);
                cboAlbum.Items.Add(listItem);
            }
        }

        protected void ShowPhotos(string albumID)
        {
            // get controller
            PicasaGalleryController galleryController = new PicasaGalleryController();

            // bind list of photos
            listPhotos.DataSource = galleryController.GetPhotosList(albumID);
            listPhotos.DataBind();
        }

        #endregion

--------------------------------------------

All is appearing in one page, on thumbnail click, some panels are changing their visibility. Simple.

I do not have any idea why it is working somewhere else, but not in DNN.

Hello again.

I found a "solution" while searching forums on the internet.

Here what one guy was suggesting: