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  • aaronb 97 posts 116 karma points
    Jul 01, 2011 @ 18:43

    possible to add an upload data type to a media folder?

    I'm trying to add an upload data type directly to a folder in the media section. When I try to add an image to it, I get an error (below).

    Is this not a valid thing to be doing, and/or is there any way around it? I want to have each photo gallery in a folder, and assign a thumbnail for each gallery to the folder. Here's the error:

    Parameter is not valid.
    Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

    Exception Details: System.ArgumentException: Parameter is not valid.

    Source Error:

    An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below. 

    Stack Trace:

    [ArgumentException: Parameter is not valid.]
       System.Drawing.Image.FromStream(Stream stream, Boolean useEmbeddedColorManagement, Boolean validateImageData) +435
       System.Drawing.Image.FromStream(Stream stream) +14
       umbraco.editorControls.uploadField.Save() +4583
       umbraco.controls.ContentControl.saveClick(Object Sender, ImageClickEventArgs e) +397
       System.Web.UI.WebControls.ImageButton.OnClick(ImageClickEventArgs e) +134
       System.Web.UI.WebControls.ImageButton.RaisePostBackEvent(String eventArgument) +165
       System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3691


  • Lesley 284 posts 143 karma points
    Jul 03, 2011 @ 12:23

    Hi Aaron,

    Where will the thumbnail be shown? I'm assuming for the visitors browsing your site? So you have a gallery overview page which has a thumbnail image for representing each gallery, and the visitor clicks the thumbnail to go to that particular gallery??

    There may be other methods, but what I would do is use normal folders in the media section to group the galleries. Modify the image datatype to add a new true/false property called UseForGalleryThumbnail (or whatever) then in each gallery sub-folder, pick a thumbnail image by ticking that option.

    Then when you create your "galleries" page macro you can parse the folders for images with that property and display the thumbnail version of the image which is automatically created by umbraco when you upload/save the image.

    You can change the width of the thumbnail created in the Upload datatype. Separate multiple sizes with semicolon. The resulting image will be called  [filename]_thumb[width here if you have multiple].jpg. Alternatively, you could use the ImageGen package, which generates thumbnails on the fly.

    Hopefully I've got the right idea of what you're trying to do! 


  • aaronb 97 posts 116 karma points
    Jul 05, 2011 @ 15:53

    Thanks Lesley,

    That's exactly how I need it to work, yes.

    I have it set up how you suggested, and that works great. The only downside is with my XSLT. I feel like it's a bit more convoluted than it needs to be. That's something I can look at optimizing later though.

    really appreciate the help, thanks again.






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