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  • Jonathan Claeys 7 posts 87 karma points
    Feb 08, 2022 @ 15:52
    Jonathan Claeys
    0

    How to pass data to a partial view of a Block List Item

    I used to pass data by using the ViewDataDictionary. But in v9 for some reason it isn't working anymore. I'm getting this error: 'ViewDataDictionary' does not contain a constructor that takes 0 arguments

    Does anyone have a solution on how to use the ViewDataDictionary in v9 or how to pass data in another way to my partial?

    Kind regards, Jonathan

  • Marc Love (uSkinned.net) 432 posts 1691 karma points
    Feb 08, 2022 @ 16:03
    Marc Love (uSkinned.net)
    0

    Hi Jonathan,

    In .net core you need to pass ViewData in the constructor

     @await Html.PartialAsync("Path to partial", model, new ViewDataDictionary(ViewData) { { "param1", param1 }, { "param2", param2}})
    
  • Jonathan Claeys 7 posts 87 karma points
    Feb 09, 2022 @ 09:29
    Jonathan Claeys
    0

    I already found that solution but then I'm getting this error:

    ArgumentException: An item with the same key has already been added. Key: param1
    

    Since it is in a loop to run over the block list items.

  • Jonathan Claeys 7 posts 87 karma points
    Feb 09, 2022 @ 09:38
    Jonathan Claeys
    0

    I think I actually found the problem, it's because I'm using another Block List editor in my Block List editor to build up a grid of items. So it's using the Default.cshtml twice to render since it's a nested Block List editor. Do you have any solutions for this?

    Kind regards, Jonathan

  • Marc Love (uSkinned.net) 432 posts 1691 karma points
    Feb 09, 2022 @ 11:02
    Marc Love (uSkinned.net)
    102

    Hi Jonathan,

    If you have several partial views included on your main view the ViewData is cleared on each call. The issue is when you have a partial view call inside a partial view. ViewData isnt cleared so if you are passing ViewData to each partial with the same keys you get this error.

    If you add:

    ViewData.Clear()
    

    before you call the partial you wont get this error message.

    Cheers,

    Marc

  • Jonathan Claeys 7 posts 87 karma points
    Feb 09, 2022 @ 15:41
    Jonathan Claeys
    0

    Perfect! Thanks a lot for your help!

  • Marc Love (uSkinned.net) 432 posts 1691 karma points
    Feb 09, 2022 @ 15:43
    Marc Love (uSkinned.net)
    0

    Hi Jonathan,

    Can you mark last answer as the solution to help other folks that come across this?

    Cheers,

    Marc

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