Validation with multiple validation errors

[NeoCoderMatrix86]

Hello,

I'm currently migrating a complex validation framework to the build in validation and I'm searching for the possiblity to display multiple errors to one field. There seems to be the possibility to use "Multiline" inside the "ValidationError", but I can not find any example. Can somebody show me, how multiline is supposed to be used?
In my example we can get each error as IEnumerable<String>

[stsrki]

First, the Multiline need to be enabled on ValidationError. Next, that multi-lined messages will only work with data annotations and fluent validation validators. Regular Validator handler doesn't support multiline messages. Technically it should work with some minor changes to the codebase, but we would need to decide on the API.

[NeoCoderMatrix86]

Ok, what is fluent validation? Is there a possiblity to set a multiline error by code?

[stsrki]

You can see fluent validation at https://docs.fluentvalidation.net/en/latest/. And the way it is used in Blazorise https://blazorise.com/docs/extensions/fluent-validation

[NeoCoderMatrix86]

Ok, I think I get it now. One question: Is there a possibility to use fluent validation in combination with an AutoComplete (https://blazorise.com/docs/extensions/autocomplete) component? I only see custom validators?!

[stsrki]

It's not possible at the moment. Our AutoComplete is a different beast from all other components so we had to figure a best way to add support for different validation modes.