在 SharePoint Online 中启用分配给电子邮件时出错

Question

我正在尝试将 SharePoint 任务列表的 EnableAssignToEmail 属性设置为 YES，以便分配的用户在任务分配给他/她后收到一封电子邮件。但我收到一个错误An unhandled exception of type 'System.MissingMethodException' occurred in mscorlib.dll

**Additional information**: Method not found: 'Void
Microsoft.SharePoint.Client.List.set_EnableAssignToEmail(Boolean)".

我正在使用nuget 软件包中最新版本的 CSOM DLL。

using (ClientContext obj = new ClientContext("SharePOint site url")) {
    using (SecureString objSec = new SecureString())
    {
        foreach (var item in "PWD")
        {
            objSec.AppendChar(item);
        }
        obj.Credentials = new SharePointOnlineCredentials("USERNAME", objSec);


        var list = obj.Web.Lists.GetByTitle("Action");
        obj.Load(list);
        //obj.Load(list.EnableAssignToEmail);
        obj.ExecuteQuery();
        list.EnableAssignToEmail = true;
        obj.ExecuteQuery();

    }
}

Answer 1

在更改 EnableAssignToEmail 属性后再次加载列表对象并执行 ExecuteQuery，如下所示：

        string userName = "xxx@tenant.onmicrosoft.com";
        Console.WriteLine("Enter your password.");
        SecureString password = GetPassword();

        using (var clientContext = new ClientContext("https://tenant.sharepoint.com/sites/sitename"))
        {
            // SharePoint Online Credentials  
            clientContext.Credentials = new SharePointOnlineCredentials(userName, password);
            // Get the SharePoint web  
            Web web = clientContext.Web;
            // Load the Web properties  
            clientContext.Load(web);
            // Execute the query to the server.  
            clientContext.ExecuteQuery();
            // Web properties - Display the Title and URL for the web  
            List list = web.Lists.GetByTitle("List1");
            list.EnableAssignToEmail = true;
            clientContext.Load(list);
            clientContext.ExecuteQuery();
         }