[英]How to load values in dropdown whose ID is not used…hide all records whose values are already used?
這將顯示所有記錄。請幫助我僅顯示未使用ID的記錄。
<select name="userDetailId" class="form-control" required>
<option value="">Select</option>
<c:forEach items="${userDetailList}" var="userDetail">
<option value="${userDetail.userDetailId}" <c:if test="${userDetail.userDetailId == dataMap.userDetailId}"> selected </c:if> >${userDetail.name}</option>
</c:forEach>
</select>
創建一些標志,比如說isUsed,並將其值填充為true / false(即是否使用),然后添加類似的條件,如下所示。
<select name="userDetailId" class="form-control" required>
<option value="">Select</option>
<c:forEach items="${userDetailList}" var="userDetail">
<c:if test="${isUsed}">
<option value="${userDetail.userDetailId}" <c:if test="${userDetail.userDetailId == dataMap.userDetailId}"> selected </c:if> >${userDetail.name}</option>
</c:if>
</c:forEach>
</select>
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