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  • blackhawk 313 posts 1368 karma points
    Dec 13, 2017 @ 14:10
    blackhawk
    0

    ModelsBuilder - Creating short conditions

    I'm on Umbraco 7.7.2 with ModelsBuilder enabled.

    I'm trying to learn how to check if if a property is not empty through the use of ModelsBuilder. This was my initial attempt...

    @if (Model.GlobalContentPanel != null)
        {
            @Model.GlobalContentPanel;
        }

    If that looks correct, is there a way to shorten that into a single line like this...

     @(Model.HasValue("globalContentPanel") ? Model.GlobalContentPanel : "<p>nothing to show at the moment</p>");

    At the moment, Visual Studio is complaining about this attempt.

    Thanks for any insight

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  • Dan Diplo 1554 posts 6205 karma points MVP 6x c-trib
    Dec 13, 2017 @ 14:33
    Dan Diplo
    0

    What type is Model.GlobalContentPanel ?

    If, for instance, it was a string, then you could just do:

    var content = !String.IsNullOrEmpty(Model.GlobalContentPanel) ? Model.GlobalContentPanel : "<p>nothing to show at the moment</p>");

    But if it's an IHtmlString (as returned by a rich-text property), then you'd check for a null:

    var content = Model.GlobalContentPanel ?? new HtmlString("<p>nothing to show at the moment</p>");

    Or you can check for empty (but not null) HTML by doing:

    var content = !String.IsNullOrEmpty(Model.GlobalContentPanel.ToString()) ? Model.GlobalContentPanel : new HtmlString("<p>nothing to show at the moment</p>")

    If it's a different type, let us know...

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  • blackhawk 313 posts 1368 karma points
    Dec 13, 2017 @ 14:41
    blackhawk
    0

    ahh I didn't know any of this. My property is a RTE. and I simply want to check if its empty, and set my backup html text, if the value is empty.

    I attempted to do the following (to test by backup text)...

        @{
        var mcontent = Model.GlobalContentPanel ?? new HtmlString("<p>nothing to show at the moment</p>");
    }
    @mcontent

    ...but with no content, it does not display nothing to show at the moment on my page. its just blank.

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  • blackhawk 313 posts 1368 karma points
    Dec 13, 2017 @ 16:08
    blackhawk
    100

    I believe I found a working solution....

      @(Model.HasValue("globalContentPanel") ? Model.GlobalContentPanel : new HtmlString("nothing to show at the moment"));

    By default this will load my RTE content. But if empty, will display my backup HtmlString.

    Thanks for helping me think this through!

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