正确理解和使用EIS的FindItems？ [英] Understand and use FindItems for EWS correctly?

问题描述

好的，我的大多数应用都在运行，但是我看到使用FindItems的很多变体都有属性和/或限制我感到困惑。 如果有人请查看这一小段代码，我的问题列在下面。 请注意，我在这里设置限制只能获取未读电子邮件，而我正在读取sMailbox变量中设置的邮箱（不是我自己的邮箱）。

Ok, I have most of my app working, but am seeing so many variations of using FindItems with properties and/or restrictions that I'm getting confused.  If someone would please review this small bit of code, my questions are listed below.  Please note, that I'm setting a restriction here to get Unread email only and I'm reading a mailbox (that is not my own) which is set in the sMailbox variable.

private void GetUnReadEmails(string sMailboxName)
 {
 // ------------------- Lets now bind to Exchange
 // Create the binding
 ExchangeServiceBinding esb = new ExchangeServiceBinding();
 esb.RequestServerVersionValue = new RequestServerVersion();
 Console.WriteLine("Exchange version: " + esb.RequestServerVersionValue.Version);
 //esb.RequestServerVersionValue.Version = ExchangeVersionType.Exchange2007_SP1; 
 ExchangeService service = GetBinding(sMailboxName);
 esb.Url = service.Url.ToString();
 esb.Credentials = new NetworkCredential(Username, Password, Domain);

 Mailbox mb = new Mailbox(sMailboxName);
 FolderId fid1 = new FolderId(WellKnownFolderName.Inbox, mb);
 // where fid1 was WellKnownFolderName.Inbox
 FindFoldersResults findResults = service.FindFolders(fid1, new FolderView(int.MaxValue));

 //ItemView iv = new ItemView(100, 0);
 //FindItemsResults<Item> findResults = null;
			//*** Can I set properties here to get unread only instead of setting restriction below?? ***
 //PropertySet psPropSet = new PropertySet(BasePropertySet.IdOnly);
 //iv.PropertySet = psPropSet;
 //while ((findResults = service.FindItems(fid1, iv)).MoreAvailable == true)
 //{
 //// PropertySet itItemPropSet = new PropertySet(BasePropertySet.IdOnly) { EmailMessageSchema.Body };
 //// service.LoadPropertiesForItems(findResults.Items, itItemPropSet);
 //service.LoadPropertiesForItems(findResults, new PropertySet(ItemSchema.Subject, ItemSchema.Body, ItemSchema.DateTimeReceived));
  // foreach (Item item in findResults.Items)
 // {
 // Console.WriteLine(item.Subject);
 // Console.WriteLine(item.DateTimeReceived);
  // Console.WriteLine(item.Body);
 // }
 // iv.Offset += findResults.Items.Count;
 //}

 //----------------------- main code ---------------
 FindItemType findItemRequest = new FindItemType();
 findItemRequest.Traversal = ItemQueryTraversalType.Shallow;

 // Define which item properties are returned in the response
 ItemResponseShapeType itemProperties = new ItemResponseShapeType();
 itemProperties.BaseShape = DefaultShapeNamesType.AllProperties;
 findItemRequest.ItemShape = itemProperties; // Add properties shape to request

 // Identify which folders to search to find items
 DistinguishedFolderIdType[] folderIDArray = new DistinguishedFolderIdType[1];
 folderIDArray[0] = new DistinguishedFolderIdType();
 folderIDArray[0].Id = DistinguishedFolderIdNameType.inbox;

 // Add folders to request
 findItemRequest.ParentFolderIds = folderIDArray;
 
 //--- Get Unread Emails
 SetIsReadRestriction(findItemRequest);
 GetEmails(esb, findItemRequest); 
 }

 private static ExchangeService GetBinding(string sMailboxName)
 {
 ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2007_SP1);
 //ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2010_SP1);
 // --- Set the service credentials
 service.Credentials = new NetworkCredential(Username, Password, Domain);
 
 try
 {
 // --- Set the url.
 //service.Url = new Uri(EWS_URL);
 service.AutodiscoverUrl(sMailboxName); //, RedirectionUrlValidationCallback);
 Console.WriteLine("ServiceURL: " + service.Url.ToString());
 }
 catch (AutodiscoverRemoteException ex)
 {
 Console.WriteLine("Exception thrown: " + ex.Error.Message);
 }
 return service;
 }

 public void SetIsReadRestriction(FindItemType findItemRequest)
 {
 //Create unread only restriction --------------------------
 RestrictionType restriction = new RestrictionType();
 IsEqualToType isEqualTo = new IsEqualToType();
 PathToUnindexedFieldType pathToFieldType = new PathToUnindexedFieldType();
 pathToFieldType.FieldURI = UnindexedFieldURIType.messageIsRead;

 FieldURIOrConstantType constantType = new FieldURIOrConstantType();
 ConstantValueType constantValueType = new ConstantValueType();
 constantValueType.Value = "0";
 constantType.Item = constantValueType;
 isEqualTo.Item = pathToFieldType;
 isEqualTo.FieldURIOrConstant = constantType;
 restriction.Item = isEqualTo;
 findItemRequest.Restriction = restriction;
 }
		
 public void GetEmails(ExchangeServiceBinding esb, FindItemType findItemRequest)
 {
 // ------------- Send the request and get the response
 FindItemResponseType findItemResponse = esb.FindItem(findItemRequest);

 // ------------- read returned
 FindItemResponseMessageType folder = (FindItemResponseMessageType)findItemResponse.ResponseMessages.Items[0];
 ArrayOfRealItemsType folderContents = (ArrayOfRealItemsType)folder.RootFolder.Item;
 ItemType[] items = folderContents.Items;
 string sText = "";
 if (items != null)
 {
 foreach (ItemType curItem in items)
 {
 sText += "Subject: " + (curItem.Subject.Trim()) + " ";
 sText += "DisplayTo: " + (curItem.DisplayTo.Trim()) + " ";
 sText += "DateTimeReceived: " + (curItem.DateTimeReceived.ToString()) + " ";
 sText += "ItemClass: " + (curItem.ItemClass.Trim()) + " ";
 sText += "\r\n";

 Console.WriteLine("Has attachments: " + curItem.HasAttachments);
 Console.WriteLine("Subject: " + curItem.Subject + " Received: " + curItem.DateTimeReceived.ToString());
 Console.WriteLine("Body: " + curItem.Body); //COMING BACK BLANK
 SetReadStatus(esb, curItem.ItemId);
 }
 }
 else
 sText = "No unread emails.";

 txtItems.Text = sText;
 }

推荐答案

嗨尼尔森，

首先，您使用的是EWS托管API和自动生成的代理。帮自己一个忙，停止使用自动生成的代理。可以删除所有ExchangeServiceBinding，DistinguishedFolderIdType，FindItemType等。

First, you are using both the EWS Managed API and auto-generated proxies. Do yourself a favor and stop using auto-generated proxies. All the ExchangeServiceBinding, DistinguishedFolderIdType, FindItemType and more can be removed.

使用EWS托管API所需的代码非常简单：

The code you need with the EWS Managed API is pretty simple:

ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2007_SP1);
service.Credentials = new NetworkCredential("user", "password", "domain");

try
{
  // --- Set the url.
  service.AutodiscoverUrl("[e-mail]");
  Console.WriteLine("ServiceURL: " + service.Url.ToString());
}
catch (AutodiscoverRemoteException ex)
{
  Console.WriteLine("Exception thrown: " + ex.Error.Message);
}

ItemView view = new ItemView(100);
view.PropertySet = new PropertySet() { RequestedBodyType = BodyType.Text };

FindItemsResults<Item> findResults;

do
{
  findResults = service.FindItems(
    WellKnownFolderName.Inbox,
    new SearchFilter.IsEqualTo(EmailMessageSchema.IsRead, true),
    view);

  service.LoadPropertiesForItems(findResults, PropertySet.FirstClassProperties);

  foreach (Item item in findResults)
  {
    Console.WriteLine(item.Subject);
    Console.WriteLine(item.DateTimeReceived);
    Console.WriteLine(item.Body);
  }
}
while (findResults.MoreAvailable);

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