Web API [FromBody] string parameter always null-CodePudding

I've been trying to pass string data using [FromBody] but it is always null.

public HttpResponseMessage Post(int id, [FromBody] string value)
{
    return Request.CreateResponse(HttpStatusCode.OK, "Success");
}

CodePudding user response：

In ASP.NET Core you cannot simply use Model binding to get the whole JSON body text as string. You have to either create a binding model or read the request body manually:

var bodyText = await this.Request.Content.ReadAsStringAsync();

CodePudding user response：

[HttpPost]
public HttpResponseMessage Post(int id, [FromBody] string value)
{
    return Request.CreateResponse(HttpStatusCode.OK, "Success");
}

The [HttpPost] attribute tells the routing engine to send any POST requests to that action method to the one method over the other. This is a type of overloading.enter link description here