how can i identify data type of blocklistmodel in code - Using Umbraco and getting started

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Kasper 13 posts 84 karma points

Mar 09, 2022 @ 09:59
0

How can I identify data type of BlocklistModel in code?
Is there any way to check the underlying datatype of a blocklist in code? Let's say I have created a blocklist data type and called it fooBlocklist and another one called barBlocklist and added a property to a document type which uses the fooBlocklist.

When accessing this property in code, I get a BlockListModel, and I can loop through the BlockListItems in the block, but is there any way to determine if the BlockListModel is using the barBlocklist or the fooBlocklist?

Something like this in pseudo:
```
if (model.myBlockListProperty is BlockListModel<fooBlockList>)
{
    //do stuff
}
```
So far, my best approach has been to check if all blockitems inside the BlockListModel are of a certain type, because I know I only have one blocklist with this specific configuration of blocks, but this approach doesn't work if the blocklist is empty.
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Ambert van Unen 175 posts 818 karma points c-trib

Mar 10, 2022 @ 22:25
0
but this approach doesn't work if the blocklist is empty.

You could easily add a
```
if (myBlockList.Any()) 
```
To check if there are any items ofcourse ;-)

I've been trying this myself aswell, and I think it's not directly possible like you want it. It's probably also the reason Umbraco provides the demo with rendering the items in the blocklist as seperate components:
```
@if (Model?.Any() == true)
{
     foreach (var block in Model)
     {
         if (block?.ContentUdi == null) { continue; }
         @(await Component.InvokeAsync(block.Content.ContentType.Alias, block))
     }
 }
```
This way you avoid the issue entirely, and always render a component with the correct model.

However! You could do exactly as Umbraco does but in a switch/case for example:
```
switch (blockListItem.Content.ContentType.Alias)
        {
            case LinkItemElement.ModelTypeAlias
                : // do this
            default:
                // else default do this
            break;
        }
```
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How can I identify data type of BlocklistModel in code?