图 - 是否有 easier/faster 方法删除 SharePoint 列表中的所有项目？

Question

以下代码遍历列表并删除每个项目。有什么 "nicer" 方法可以从列表中删除所有项目吗？（除了删除它并重新创建它？）类似 List.Purge

var deleteQueryOptions = new List<QueryOption>()
{
   new QueryOption("expand", "fields(select=id)")
};

Console.WriteLine("Deleting ROWS from the list (UPDATING)");
var deleteItems = await graphServiceClient.Sites[siteUrl].Lists[listName].Items
                  .Request(deleteQueryOptions)
                  .GetAsync();

do
{
   Console.ForegroundColor = ConsoleColor.DarkYellow;
   Console.WriteLine("Processing PAGE of LIST ITEMS");
   Console.ResetColor();

   foreach (var deleteItem in deleteItems)
   {
      await graphServiceClient.Sites[siteUrl].Lists[listName].Items[deleteItem.Id]
                                .Request()
                                .DeleteAsync();
   }

   Console.ForegroundColor = ConsoleColor.Green;
   Console.WriteLine("Another PAGE of List Items successfully deleted");
   Console.ResetColor();
   try
   {
     deleteItems = await deleteItems.NextPageRequest.GetAsync();
   }
   catch
   {
     Console.ForegroundColor = ConsoleColor.DarkYellow;
     Console.WriteLine("There is no NextPageRequest for deleting items.");
     Console.ResetColor();
   }
   // While there is another page with data, get it and do the process again (At this moment 1 page contains 200 items, written by Marek Kyzivat @ 05/08/2019 )
} while (deleteItems.NextPageRequest != null);

这样就可以完成工作了，但是一旦你有一个更大的列表，它可能需要一些时间。

Answer 1

如果您像这样更新内部循环，应该会有帮助。

ServicePointManager.DefaultConnectionLimit = 30;
var tasks = new List<Task>();

foreach (var deleteItem in deleteItems)
{
    task.Add(graphServiceClient.Sites[siteUrl].Lists[listName].Items[deleteItem.Id]
                                .Request()
                                .DeleteAsync());
}

Task.WaitAll(tasks.ToArray());

另请注意，打开连接的默认数量为 2。增加此数量会占用更多内存，但会允许更多并发调用。

我真的很想知道在这种特定情况下对性能的影响。我们目前正在尝试确定更好的编程模型来向 Graph 发出并发请求。

图 - 是否有 easier/faster 方法删除 SharePoint 列表中的所有项目？

Graph - Is there easier/faster way to delete all items within a SharePoint list?

microsoft-graph-sdks

microsoft-graph-api