How to extract values from user input form via custom middleware?

Question

I tried to find thoes values with debugger in HttpContext but it seems like it's more complicated than just Dictionary(key,value)

app.Use(async (context, next) =>
{
    foreach (var item in context.???)
    {
        Console.WriteLine('{item.Key}':'{item.Value}'");
    }
    await next.Invoke();
});

eg

Sample form:

<input type="text" name="FirstName" />
<input type="text" name="Age" />

Expected console output:

'FirstName':'John'
'Age':'123'

Answer 1

The place to go for form data is context.Request.Form. If you want query string data parsed out, it would be context.Request.Query...but the form data is what you need.