Noticed a strange thing the other day, a list has the property ItemCount and also an Items collection which has its own .Count b

原创于 2009-01-08 09:22:00 发布 · 639 阅读

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#list #output #go

本文通过一个具体的代码示例展示了在使用 SharePoint 列表时，ItemCount 和 Items.Count 属性值不一致的问题。此现象提示开发者在操作列表时需注意内部集合更新的不同步情况。

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Noticed a strange thing the other day, a list has the property ItemCount and also an Items collection which has its own .Count but they don't always give the same answer. If I have a piece of code like this pointing to a list with 4 items in it.

1 using (SPSite site = new SPSite( " http://mwmoss/marktest " ))
2 {
3 using (SPWeb web = site.OpenWeb())
4 {
5 SPList list = web.Lists[ " Mark's Contacts " ];
6
7 while (list.Items.Count > 0 )
8 {
9 list.Items[ 0 ].Delete();
10 Console.WriteLine( " ItemCount " + list.ItemCount.ToString());
11 Console.WriteLine( " Items.Count " + list.Items.Count.ToString());
12 }
13 }
14 }

The output looks like this:-

ItemCount 4
Items.Count 3
ItemCount 4
Items.Count 2
ItemCount 4
Items.Count 1
ItemCount 4
Items.Count 0

I guess internally some collection isn't getting updated as we go round the loop. Something to be careful of anyway.

引用：

http://planetwilson.blogspot.com/2007/12/itemcount-and-itemscount.html