1

我正在尝试使用 C# 中的客户端对象模型更新 Sharepoint 讨论板中的字段。当代码到达时，clientContext.ExecuteQuery()它会抛出异常：

Invalid data has been used to update the list item. The field you are trying to update may be read only.

这是代码的一部分：

foreach (var field in newItemProperties)
{
    if (field.Key.Equals("ContentType"))
        continue;

    if (ctFields == null)
        spItem[field.Key] = field.Value;

    else
    {
        bool foundField = false;
        foreach (var fieldCT in ctFields)
        {
            fieldCT.ReadOnlyField=false;
            if (fieldCT.InternalName == field.Key)
            {
                foundField = true;
                if (isAllDayEvent)
                {
                    if (field.Key == "EventDate")
                    {
                        // For all day event, Add 10 hour in order to prevent the EventDate to be decreased by 1 day
                        var dateVal = (DateTime)field.Value;
                        // spItem[field.Key] = dateVal.Add(new TimeSpan(0, 10, 0, 0, 0));
                    }
                    else if (field.Key == "EndDate")
                    {
                        // For all day event, Subtract 10 hour in order to prevent the EndDate to be increased by 1 day
                        var dt = (DateTime)field.Value;
                        // spItem[field.Key] = dt.Subtract(new TimeSpan(0, 10, 0, 0, 0));
                    }
                    else
                        spItem[field.Key] = field.Value;

                }
                else
                    spItem[field.Key] = field.Value;

                break;
            }
        }

        if (!foundField)
        {
            // Update the item properties values even its not part of CT
            // MM hidden fields are not part of CT fields
            if (isAllDayEvent)
            {
                if (field.Key == "EventDate")
                {
                    // For all day event, Add 10 hour in order to prevent the EventDate to be decreased by 1 day
                    var dateVal = (DateTime)field.Value;
                    //spItem[field.Key] = dateVal.Add(new TimeSpan(0, 10, 0, 0, 0));
                }
                else if (field.Key == "EndDate")
                {
                    // For all day event, Subtract 10 hour in order to prevent the EndDate to be increased by 1 day
                    var dt = (DateTime)field.Value;
                    //spItem[field.Key] = dt.Subtract(new TimeSpan(0, 10, 0, 0, 0));
                }
                else
                    spItem[field.Key] = field.Value;

            }
            else
                spItem[field.Key] = field.Value;
        }
    }
}

spItem.Update();            
clientContext.ExecuteQuery();
4

2 回答 2

0

我把我的答案放在这里，以防人们通过谷歌搜索这个 SO 问题标题中的错误消息找到这个问题。此答案可能会帮助遇到此奇怪错误消息的其他人。

当我使用服务器端代码更新日历事件时，我遇到了同样的错误。

我的代码首先添加了一个新的空列表项。此新列表项具有开始日期和结束日期的默认值。几行之后，列表项字段被一一更新（类似于操作码），然后update调用一个列表项。在我的情况下，我的代码没有更新开始日期，并且仍然是默认值。我的代码更新了结束日期，并且结束日期早于默认开始日期。触发列表项update时，此错误将显示在我的异常日志中。

一旦我纠正了这一点并将开始日期调整为总是在结束日期之前，然后调用update，错误就消失了。

于 2017-03-24T20:12:38.917 回答
-1

请尝试以下方法：

Microsoft.SharePoint.Client.CamlQuery caml = new Microsoft.SharePoint.Client.CamlQuery();

caml.ViewXml = @"<View><Query><Where><Eq><FieldRef Name='FileLeafRef'/><Value Type='File'>" + itemname+ "</Value></Eq></Where></Query></View>";



caml.FolderServerRelativeUrl = relativepath;



Microsoft.SharePoint.Client.ListItemCollection items = list.GetItems(caml);


clientContext.Load(items);

clientContext.Credentials = new NetworkCredential("username","password","domain");


clientContext.ExecuteQuery();


if (items.Count > 0){item["attribute"]=value;}
于 2014-03-17T09:58:59.733 回答