添加项目文件。

HT.Cloud.Web/wwwroot/js/lay-module/cron/cron.css

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+/**
+ @ Name：layui.cron Cron表达式解析器
+ @ Author：贝哥哥
+ @ License：MIT
+ */
+
+
+/* 样式加载完毕的标识 */
+html #layuicss-cron {
+    display: none;
+    position: absolute;
+    width: 1989px;
+}
+
+
+/* 主体结构 */
+.layui-cron {
+    position: absolute;
+    z-index: 1000;
+    margin: 5px 0;
+    border-radius: 2px;
+    font-size: 14px;
+    -webkit-animation-duration: 0.3s;
+    animation-duration: 0.3s;
+    -webkit-animation-fill-mode: both;
+    animation-fill-mode: both;
+    background-color: white;
+    display: flex;
+    flex-direction: column;
+    box-shadow: rgba(0, 0, 0, 0.1) 0px 2px 5px 0px;
+    -webkit-animation-name: cron-upbit;
+    animation-name: cron-upbit;
+    border: 1px solid #e6e6e6;
+}
+
+@-webkit-keyframes cron-upbit {
+
+    /* 微微往上滑入 */
+    from {
+        -webkit-transform: translate3d(0, 20px, 0);
+        opacity: 0.3;
+    }
+
+    to {
+        -webkit-transform: translate3d(0, 0, 0);
+        opacity: 1;
+    }
+}
+
+@keyframes cron-upbit {
+    from {
+        transform: translate3d(0, 20px, 0);
+        opacity: 0.3;
+    }
+
+    to {
+        transform: translate3d(0, 0, 0);
+        opacity: 1;
+    }
+}
+
+/* tabs */
+.layui-cron>.layui-tab {
+    margin: 0;
+    box-shadow: none;
+    border: none;
+}
+
+/* 表达式 */
+.cron-title {
+    font-weight: 700;
+    font-size: 14px;
+    margin: 10px;
+    margin-bottom: 0;
+}
+
+.cron-box {
+    margin: 10px;
+}
+
+.cron-box+.cron-box {
+    margin-top: 0;
+}
+
+/* 按钮 */
+.cron-footer-btns {
+    text-align: right;
+}
+
+.cron-footer-btns span {
+    height: 26px;
+    line-height: 26px;
+    margin: 0 0 0 -1px;
+    padding: 0 10px;
+    border: 1px solid #C9C9C9;
+    background-color: #fff;
+    white-space: nowrap;
+    vertical-align: top;
+    border-radius: 2px;
+    display: inline-block;
+    cursor: pointer;
+    font-size: 12px;
+    box-sizing: border-box;
+    color: #666;
+}
+
+.cron-footer-btns span:hover {
+    color: #5FB878;
+}
+
+
+/* 表单 */
+.layui-cron .layui-form-radio {
+    margin-right: 0;
+}
+
+.cron-form {
+    line-height: 28px;
+    font-size: 14px;
+}
+
+.cron-input-mid {
+    display: inline-block;
+    vertical-align: middle;
+    margin-top: 6px;
+    background-color: #e5e5e5;
+    padding: 0 12px;
+    height: 28px;
+    line-height: 28px;
+    border: 1px solid #ccc;
+    box-sizing: border-box;
+}
+
+.cron-input {
+    display: inline-block;
+    vertical-align: middle;
+    margin-top: 6px;
+    padding: 0 8px;
+    background-color: #fff;
+    border: 1px solid #ccc;
+    height: 28px;
+    line-height: 28px;
+    box-sizing: border-box;
+    width: 80px;
+    -webkit-transition: border-color ease-in-out .15s, -webkit-box-shadow ease-in-out .15s;
+    -o-transition: border-color ease-in-out .15s, box-shadow ease-in-out .15s;
+    transition: border-color ease-in-out .15s, -webkit-box-shadow ease-in-out .15s;
+    transition: border-color ease-in-out .15s, box-shadow ease-in-out .15s;
+    transition: border-color ease-in-out .15s, box-shadow ease-in-out .15s, -webkit-box-shadow ease-in-out .15s;
+}
+
+.cron-input:focus {
+    outline: 0;
+    border: 1px solid #01AAED;
+    box-shadow: inset 0 1px 1px rgba(0, 0, 0, .075), 0 0 4px 0px #01AAED;
+    translate: 1s;
+}
+
+.layui-cron .layui-form-checkbox[lay-skin="primary"] span {
+    padding-right: 10px;
+    min-width: 16px;
+}
+
+.layui-cron .layui-form-checkbox[lay-skin="primary"] {
+    padding-left: 22px;
+    margin-top: 5px;
+}
+.layui-cron input[type=number] {
+    -moz-appearance:textfield;
+}
+.layui-cron input[type=number]::-webkit-inner-spin-button,
+.layui-cron input[type=number]::-webkit-outer-spin-button {
+    -webkit-appearance: none;
+    margin: 0;
+}
+.cron-tips{
+    color: grey;
+    line-height: 28px;
+    height: 28px;
+    display: inline-block;
+    vertical-align: middle;
+    margin-top: 8px;
+    margin-left: 5px;
+}