如何将用户的外键发布到Asp.Net Web API中的另一个表

Question

是新手，请原谅我。

我有一个带有“ UserId”列的用户表，此“ UserId”是另一个表“日历表”的外键。如何从日历控制器发送发布方法以将UserId从用户表发布到日历表？

dbo.calendar

[FileLength]           BIGINT         NOT NULL,
[CreationTime]         DATETIME       NOT NULL,
[LastUpdatedOn]        DATETIME       NULL,
[UserId]               NVARCHAR (128) NOT NULL,
[ApplicationUser_Id]   NVARCHAR (128) NULL,
CONSTRAINT [PK_dbo.CalendarTables] PRIMARY KEY CLUSTERED ([Id] ASC),
CONSTRAINT [FK_dbo.CalendarTables_dbo.User_ApplicationUser_Id] FOREIGN KEY ([ApplicationUser_Id]) REFERENCES [dbo].[User] ([Id]),
CONSTRAINT [FK_dbo.CalendarTables_dbo.User_UserId] FOREIGN KEY ([UserId]) REFERENCES [dbo].[User] ([Id])

dbo.users

[LockoutEnabled]       BIT            NOT NULL,
[AccessFailedCount]    INT            NOT NULL,
[UserName]             NVARCHAR (256) NOT NULL,
[UserId]               NVARCHAR (MAX) NULL,
CONSTRAINT [PK_dbo.User] PRIMARY KEY CLUSTERED ([Id] ASC)

日历控制器

// POST api/value
    [AllowAnonymous]
    [ResponseType(typeof(CalendarTable))]

    public IHttpActionResult PostCalendar(CalendarTable calendarTable)
    {
        if (!ModelState.IsValid)
        {
            return BadRequest(ModelState);
        }

        db.CalendarTables.Add(calendarTable);
        db.SaveChanges();

        return CreatedAtRoute("DefaultApi", new { id = calendarTable.Id }, calendarTable);
    }

我只需要一种方法或方法，即可在发出发布请求时将特定用户“ UserId”从用户表发布到日历表的“ UserId”。谢谢