array[oListItem.id] 有值，但 array[6]、array[7] 等未定义

Question

我从 SharePoint 列表中检索值并将它们放入数组 itemprices。

使用console.log("Price of list item at is:" + itemprices[oListItem.id]); 将打印出数组的值，但使用console.log("itemprices 5: " + itemprices[5]); 告诉我它们是未定义的：

这是我使用的代码：

var itemprices = [];

// Gets values from Catalogue list; but they can't be used in the Position list because of different formats
function retrieveListItems() {
    var clientContext = new SP.ClientContext.get_current();
    catalogueList = clientContext.get_web().get_lists().getByTitle('Catalog');

    var camlQuery = new SP.CamlQuery(); // initiate the query object
    camlQuery.set_viewXml('<View><Query><Where><In><FieldRef Name=\'ID\'/><Values><Value Type=\'Number\'>5</Value><Value Type=\'Number\'>6</Value><Value Type=\'Number\'>7</Value></Values></In></Where></Query></View>');
    itemColl = catalogueList.getItems(camlQuery);

    // returns the item collection based on the query
    context.load(itemColl);
    context.executeQueryAsync(retrieveListItemsSuccess, retrieveListItemsFail);
}

function retrieveListItemsSuccess() {
    var listItemEnumerator = itemColl.getEnumerator();
    while (listItemEnumerator.moveNext()) {
        var oListItem = listItemEnumerator.get_current();
        itemprices[oListItem.id] = oListItem.get_item('Preis');
        console.log("itemprices 5: " + itemprices[5]);
        console.log("itemprices 6: " + itemprices[6]);
        console.log("itemprices 7: " + itemprices[7]);
        console.log("Price of list item at is:" + itemprices[oListItem.id]);
    }
}
// This function is executed if the above call fails
function retrieveListItemsFail(sender, args) {
    alert('Failed to get list items. Error:' + args.get_message());
}

我不知道这是 JavaScript 问题还是 SharePoint 问题。我做错了什么？

Answer 1

首先，请使用正确的ClientContext对象，在上面的代码sn-p中，它应该是clientContext而不是context，如果你想将字段值填充到数组中，请尝试使用array.push，这里是修改后的代码 sn-p 供您参考：

<script type="text/javascript">
ExecuteOrDelayUntilScriptLoaded(retrieveListItems, 'sp.js');
var itemprices = [];
// Gets values from Catalogue list; but they can't be used in the Position list because of different formats
function retrieveListItems() {
    var clientContext = new SP.ClientContext.get_current();
    catalogueList = clientContext.get_web().get_lists().getByTitle('Companies');

    var camlQuery = new SP.CamlQuery(); // initiate the query object
    camlQuery.set_viewXml('<View><Query><Where><In><FieldRef Name=\'ID\'/><Values><Value Type=\'Number\'>5</Value><Value Type=\'Number\'>6</Value><Value Type=\'Number\'>7</Value></Values></In></Where></Query></View>');
    itemColl = catalogueList.getItems(camlQuery);

    // returns the item collection based on the query
    clientContext.load(itemColl);
    clientContext.executeQueryAsync(retrieveListItemsSuccess, retrieveListItemsFail);
}

function retrieveListItemsSuccess() {
    var listItemEnumerator = itemColl.getEnumerator();
    while (listItemEnumerator.moveNext()) {
        var oListItem = listItemEnumerator.get_current();
        itemprices.push(oListItem.get_item('Title'));
      }
      console.log(itemprices);
 }
// This function is executed if the above call fails
function retrieveListItemsFail(sender, args) {
    alert('Failed to get list items. Error:' + args.get_message());
}
</script>

这是我的列表数据：

这是来自控制台的数组：

Answer 2

你可以使用这个功能：

itemprices.map(itemPrice => console.log(itemPrice))