405（不允许的方法）错误web api ajax call

Question

我正在尝试创建一个web api应用程序但我的ajax调用有问题（使用angularjs）。我的get方法没问题但是当我想调用getbyid方法时，它返回405（方法不允许）。

控制器：

public class BasicInformationRepository : IBasicInformationRepository
{
    private readonly PezhContext _context;

    public BasicInformationRepository(PezhContext context)
    {
        _context = context;
    }

    /// <summary>
    /// takes all SUBSYSTEMS
    /// </summary>
    /// <returns>SUBSYSTEMS</returns>
    public IEnumerable<BasicInformation> GetSubSystems()
    {
        return _context.BasicInformation.Where(a => a.BsiType == 1 && a.BsiParrentId == 0);
    }

    public IEnumerable<BasicInformation> GetSubMenuBySubSystem(int subSystemId)
    {
        return from bsi in _context.BasicInformation
            where (bsi.BsiParrentId == subSystemId && bsi.BsiType == 2)
            select bsi;
    }
}