如何将下拉列表选定值添加到sharepoint列表中的sharepoint查阅列

Question

以下是我如何在 listItemState 变量中获取下拉列表选择值：

+--------+---------------------+---------------------+
|UniqueID|start_time           |stop_time            |
+--------+---------------------+---------------------+
|u3      |2018-01-25 18:56:17.0|2018-01-31 07:48:48.0|
|u1      |2018-01-22 13:04:32.0|2018-01-25 20:51:43.0|
|u1      |2018-02-02 09:40:58.0|2018-02-05 14:03:27.0|
|u2      |2018-01-22 13:04:35.0|2018-01-25 18:55:08.0|
|u2      |2018-01-31 07:48:43.0|2018-02-02 09:41:01.0|
+--------+---------------------+---------------------+

如何将此值（从下拉列表中选择）传递到 State 列，该列是其他列表中的查阅列。

    var stcode = document.getElementById("Projstcode");       
    var stcodetxt = stcode.options[stcode.selectedIndex].text;
    var listItemState = stcodetxt;

Answer 1

查找字段设置为查找ID，此Id值是下拉列表选项Id，请参阅下面的演示以获取所选选项的ID，然后将其设置为列表查找字段：

<script type="text/javascript" src="../SiteAssets/jquery.js"></script>
<script type="text/javascript">
        function additemstolist() 
        {

            var context = new SP.ClientContext.get_current();
            var web = context.get_web();
            var list = web.get_lists().getByTitle('NewList');

            var listItemInfo = new SP.ListItemCreationInformation();
            var listItem = list.addItem(listItemInfo);

            listItem.set_item('Title', 'My Test Title');

            var countryvalue = new SP.FieldLookupValue();
            countryvalue.set_lookupId($("select[title='myselect'] option:selected").attr("id"));
            listItem.set_item('carlookup', countryvalue);

            listItem.update();

            context.executeQueryAsync(Function.createDelegate(this, this.onSuccess), Function.createDelegate(this, this.onFailure));

        }

        function onSuccess() {

            alert("Item Added Successfully.");

        }

        function onFailure() {

            alert("Error Occured!!!");

        }
</script>

<select title="myselect">
  <option value="volvo" id="1">Volvo</option>
  <option value="saab" id="2">Saab</option>
  <option value="mercedes" id="3">Mercedes</option>
</select>
<input type='button' id='1234' value='Click Me' onclick="additemstolist();"/>