How to get query string parameter value in asp.net core?

Question

I'm trying to get a query string value using:

_httpContextAccessor.HttpContext.Request.QueryString["data"]

but it fails with error:

Cannot apply indexing with [] to an expression of type 'QueryString'

QueryString is from the Microsoft.AspNetCore.Http namespace.

Answer 1

Generally, you should rely on model-binding to access incoming values, not read them explicitly from a certain request source.

However, the correct way to read query-string values is through Request.Query instead. And in your case:

_httpContextAccessor.HttpContext.Request.Query["data"]

See Model-Binding