How to pass parameters to Ajax to asp.Net core

Question

I have a simple controller:

[HttpPost("/api/LogError")]
public void LogError(string msg)
{
}

and javascript:

    fetch('/api/LogError', {
        method: 'POST',
        body: JSON.stringify({
            'msg': tx
        })
    })

this doesn't work. How should I properly pass a parameter?

Your fetch request isn't posting a string. It's posting an object that contains a property of type string. Have you considered changing your action method signature to accept an object that has a property named msg of type string? — mason
– mason, Commented May 1, 2020 at 17:14
thanks mason, but I don't want to change the method signature. Any other way? — Rob The Quant
– Rob The Quant, Commented May 2, 2020 at 13:57

Rithik Banerjee · Accepted Answer · 2020-05-01 17:45:08Z

1

you need to add data and content type like this:

dataType: 'json',
contentType: 'application/json; charset=utf-8'

answered May 1, 2020 at 17:22

Rithik Banerjee

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