bitforum-backend/Admin/Pages/Forum/Board/_Header.cshtml

@using Library.Models.Forum
@{
    var boardID = ViewData["BoardID"] as int?;
    var boardList = ViewData["BoardList"] as List<Board>;
}

<div class="row">
    <div class="col">
        <h3>@ViewData["Title"]</h3>
    </div>
    <div class="col-auto">
        <select id="boardID" class="form-select" required>
            <option value="">게시판 선택</option>
            @if (boardList != null)
            {
                @foreach (var row in boardList)
                {
                    <option value="@row.ID" selected="@(row.ID == boardID)">@row.Name</option>
                }
            }
        </select>
    </div>
</div>
<hr />

<script type="module">
    $(document).on("change", "#boardID", function () {
        var boardID = $(this).val();
        if (boardID) {
            const url = new URL(window.location.href);

            const pathSegments = url.pathname.split('/');

            if (pathSegments.length >= 6) {
                pathSegments[5] = boardID;
            }

            const newPath = pathSegments.join('/');
            const newURL = `${newPath}${url.search}`;

            window.location.href = newURL;
        }
    });
</script>