从Web API控制器方法中的ParameterInfo确定参数位置

Question

I have an ASP.Net Web Api controller like this:

public class SomeController : ApiController
{
    public myObject Post([FromUri]string qsVar, [FromBody]yourObject bVar)
    {
        return myObject(qsVar, bVar);
    }
}

I am writing a documentation generator and need to determine if a parameter is [FromUri] or [FromBody] based on it's ParameterInfo .

Type tc = typeof(SomeController);

foreach (MethodInfo m in tc.GetMethods())
{
    foreach (ParameterInfo p in m.GetParameters())
    {
        if (p.isFromBody ???) doThis(); else doThat();
    }
}

How do I determine whether a parameter has a [FromUri] or [FromBody] flag in an ASP.Net Web Api Controller method?

Answer:

bool isFromUri = p.GetCustomAttributes(false)
    .Any(x => x.GetType() == typeof(FromUriAttribute));

Answer 1

You may take a look at the CustomAttributes property:

bool hasFromBodyAttribute = p
    .CustomAttributes
    .Any(x => x.AttributeType == typeof(FromBodyAttribute));

if (hasFromBodyAttribute) 
{
    doThis(); 
}
else 
{
    doThat();
}