如何从 SharePoint 2010 Web 服务中异步获取列表项答案

【问题标题】：How to get the listitems async from a SharePoint 2010 webservice如何从 SharePoint 2010 Web 服务中异步获取列表项
【发布时间】：2015-07-31 09:08:55
【问题描述】：

我正在用 C# 开发一个 Web api。在 Webapi 中，我调用了 SharePoint Web 服务。

在方法中，我使用方法 listservice.GetListItems。问题是它不是异步的，我想让它异步。是否有可能使其异步？

 //create listservice instance
            var listService = GetListService();
            //Get the listName and rowlimit
            string rowLimit = MaxItemsList;

            //Create elements for the faq list
            XmlElement query = xmlDoc.CreateElement("Query");
            XmlElement viewFields = xmlDoc.CreateElement("ViewFields");
            XmlElement queryOptions = xmlDoc.CreateElement("QueryOptions");
            var sPList = listService.GetList(listName);
            if (sPList != null)
            {
                //get the faq items
                return listService.GetListItems(listName, string.Empty,   query, viewFields, rowLimit,
                    queryOptions, null);
            }

希望大家帮帮我

【问题讨论】：

标签： c# web-services sharepoint asynchronous sharepoint-2010

【解决方案1】：

当然，SharePoint Web Services 方法可以异步调用，以下示例演示了如何转换您的示例：

using (var listService = GetListService(webUri,userName,password))
{
     listService.GetListAsync(listName, listName);
     listService.GetListCompleted += ProcessListResult;
}

在哪里

    static void ProcessListResult(object sender, GetListCompletedEventArgs e)
    {
        var proxy = sender as Contoso.Lists;
        var listName = e.UserState as string;

        var xmlDoc = new System.Xml.XmlDocument();
        var ndQuery = xmlDoc.CreateElement("Query");
        var ndViewFields = xmlDoc.CreateElement("ViewFields");
        var ndQueryOptions = xmlDoc.CreateElement("QueryOptions");
        proxy.GetListItemsAsync(listName, null, ndQuery, ndViewFields, null, ndQueryOptions, null);
        proxy.GetListItemsCompleted += ProcessListItemsResult;
    }

    static void ProcessListItemsResult(object sender, GetListItemsCompletedEventArgs e)
    {
        //omitted for clarity...
    }

【讨论】：