modelsbuilder creating short conditions - Templates, (partial) views and macros

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blackhawk 313 posts 1368 karma points

Dec 13, 2017 @ 14:10
0

ModelsBuilder - Creating short conditions

Templates, (partial) views and macros

Umbraco 7
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 5x c-trib

Dec 13, 2017 @ 14:33

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
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
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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ModelsBuilder - Creating short conditions