问Post 500错误: axios在asp.net react应用程序中的两个非常相似但独立的函数中行为不同

EN

export function PostComment(commentData) {
    return dispatch => {

        dispatch(dataOperationBegin());

        axios({
            method: 'post',
            url: 'api/AssessmentDiscussionPost/Create',
            data: {
                Content: commentData.Content,
                DoesAgree: commentData.DoesAgree,
                ParentPostId: commentData.ParentPostId,
                SubmissionId: commentData.SubmissionId,
                RubricItemId: commentData.RubricItemId
            }
        })
            .then(response => {
                dispatch(postCommentSuccess(response.data));
            })
            .catch(error => { dataOperationFailure(error) });
    };
}


export function UpdateComment(commentData) {
    return dispatch => {

        dispatch(dataOperationBegin());

        axios(
            {
                method: 'post', url: 'api/AssessmentDiscussionPost/Update',
                data: {
                    Id: commentData.Id,
                    Content: commentData.Content,
                    PostOwnerId: commentData.PostOwnerId,
                    ParentPostId: null,
                    SubmissionId: commentData.SubmissionId
                },
            })
            .then(response => {
                dispatch(updateCommentSuccess(response.data));
            })
            .catch(error => { dataOperationFailure(error) });
    };
}

    [Authorize(Roles = "Student, Instructor")]
    [HttpPost]
    [Route("api/AssessmentDiscussionPost/Create")]
    public AssessmentDiscussionPostDTO Create([FromBody] AssessmentDiscussionPost post)
    {

    [Authorize(Roles = "Student, Instructor")]
    [HttpPost]
    [Route("api/AssessmentDiscussionPost/Update")]
    public AssessmentDiscussionPost Update([FromBody] AssessmentDiscussionPost post)
    {