FromQuery invalid Dictionary parameters values when dot sign inside

[jsobus-neurosys]

Problem when getting a Dictionary<string, string> as all parameters passed to the controller in query string. I am using [FromQuery] for that case but when parameter got a dot sign (.) inside it's name it get parsed wrong. What is more I debugged it and inside Response.Query object it is handled properly so the problem probably is somewhere in DictionaryModelBinderProvider. Below screenshot to the debugged code:

Full query string sent to the controller:

?query=&InspectionType=Safety&ItemType=InspectionPoint&RecordParentGUID=9275bee2-0a2d-461c-8835-51880e76f035&parent.ResultClassCode=parent.ResultClassCode

Already opened a question on SO about that problem so will add also a link here: https://stackoverflow.com/questions/45997570/asp-net-core-fromquery-getting-invalid-parameters-with-dot-sign-inside

[jsobus-neurosys]

As a workaround I can use Request.Query.ToDictionary(kvp => kvp.Key, kvp => kvp.Value) but the question is if that is a bug or not?

[Eilon]

Hi @jsobus-neurosys sorry for the delay.

This is by-design, per the answer listed at https://stackoverflow.com/a/46003081/31668.

The . character is indeed a special character that denotes a sub-property (just like in C#). The other special characters are [ and ], which denote indexers (also, just like in C#).

These patterns are fairly common in various binding systems. jQuery, PHP, and other frameworks follow similar patterns.