How to load messages faster? EWS C#-CodePudding

I have a question about loading methods for EWS. I have a lot of messages in my outlook and I'm also using EWS and WinForms.

Right know my code is this:

while (more)
        {
            FindItemsResults<Item> findResults1 = allItemsFolder.FindItems("System.Message.DateReceived:01/01/2011..12/31/2022", iv);

            foreach (var item in findResults1)
            {
                if (item.GetType() == typeof(Microsoft.Exchange.WebServices.Data.EmailMessage))
                {
                    listik.Add(item);
                }
            }
            more = findResults1.MoreAvailable;
            if (more)
            {
                iv.Offset  = 1000;
            }
        }

It took 12 minutes already for me for running my application and I decided to stop it, because something is wrong. I think I have more than 61k messages.

Anyone can help me with that?

CodePudding user response：

I would try to remove the search and try again its pretty pointless anyway with such a broad date range, the all items folder is a search folder so your applying one search on top of the other which generally doesn't work well. Also use a property set to limit the result that is returned to just the properties you want which will also make the query run faster eg

     iv.PropertySet =
     new PropertySet(
           BasePropertySet.IdOnly,
           ItemSchema.Subject);

CodePudding user response：

No email app, including Outlook, ever loads all messages in a folder. Use a virtual listview/grid and retrieve the messages (using the appropriate offset) only when displaying them to an end user.