剖析SharePoint：通过唯一的ID获取SPListItem [英] SharePoint: Get SPListItem by Unique ID

问题描述

我试图从一个独特的ID（GUID）得到一个SPListItem对象。通过观察几个网站（INC 的http：// sharepoint400 .blogspot.com / 2011/04 /使用-spsitedataquery找到的-list.html 和的 http://www.chakkaradeep.com/post/Retrieving-an-Item-from-the-RootWeb-and-Subwebs-利用其通UniqueId.aspx ）我想出了下面的代码。

I am attempting to get an SPListItem object from a unique ID (GUID). From looking at several sites (inc. http://sharepoint400.blogspot.com/2011/04/using-spsitedataquery-to-find-list.html and http://www.chakkaradeep.com/post/Retrieving-an-Item-from-the-RootWeb-and-Subwebs-using-its-UniqueId.aspx) I came up with the code below.

const string QueryFormat =
@"<Where>
    <Eq>
        <FieldRef Name='UniqueId' />
        <Value Type='Lookup'>{0}</Value>
    </Eq>
</Where>";

            SPSiteDataQuery query = new SPSiteDataQuery();
            query.Webs = "<Webs Scope='SiteCollection' />";
            query.Lists = "<Lists BaseType='0'/>";
            query.Query = string.Format(QueryFormat, itemUniqueId);
            query.RowLimit = 1;
            //query.ViewFields = "<FieldRef Name='WebID' /><FieldRef Name='ListID' /><FieldRef Name='ID' />";

            var results = SPContext.Current.Web.GetSiteData(query);

不过，无论怎样......我似乎总是得到零行返回。我不明白为什么，因为我知道我使用的GUID是正确的。

However, no matter what... I always seem to get zero rows returned. I don't understand why, because I know the Guids I am using are correct.

任何想法？

推荐答案

有一个无效类型唯一ID应该GUID。
更新查询：

There is an invalid type for Unique Id, it should be Guid. Update your query:

<Where>
    <Eq>
        <FieldRef Name='UniqueId'/>
        <Value Type='Guid'>{0}</Value>
    </Eq>
</Where>

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