EWS编程问题二：如何利用EWS读取Exchange里面相应用户的未读邮件数量（解决）...

最新推荐文章于 2021-02-21 07:24:07 发布

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最新推荐文章于 2021-02-21 07:24:07 发布

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本文介绍了一种方法，通过Exchange Web Service API读取指定域用户的Exchange邮箱中未读邮件的数量。文中提供了C#实现的具体代码示例，包括如何设置连接、认证及获取特定文件夹（如收件箱）中的未读邮件计数。

最近几个项目都碰到如何读取Exchange中，登录域用户的未读邮件数量问题，查了一些文章这个问题终于解决掉。现在将源代码放在这里。首先新建一个项目，控制台应用程序，WinForm或者WebPart，网站都可以。然后我们添加Exchange的WebService引用，这里可以完成很多对Exchange邮箱的操作，可以分别读取相应文件夹里面的东西，甚至是邮件的内容等等，当然，这肯定是需要用户的用户名和密码才能完成，不然这个Exchange就不安全了，O(∩_∩)O~

在添加Exchange的WebService时有个需要注意的问题，不然你是不能找到ExchangeServiceBinding这个类的。请参考这篇文章。剩下的代码如下：

调用部分的代码：

代码

ServicePointManager.ServerCertificateValidationCallback = delegate (Object obj, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors) { return true ; };

ExchangeServiceBinding service = new ExchangeServiceBinding ();

service.RequestServerVersionValue = new RequestServerVersion();
service.RequestServerVersionValue.Version = ExchangeVersionType.Exchange2010;
service.EnableDecompression = true ;
service.Credentials = new NetworkCredential( " username " , " password " , " domain " );
service.Url = @https: // 192.168.100.11/EWS/exchange.asmx;

int merCurrentCount = GetUnreadFolderItemsCount(service, " Inbox " );

涉及到的两个方法：

代码

public int GetUnreadFolderItemsCount(ExchangeServiceBinding service, string folderName)
       {
            int unReadCount = - 1 ;
            // Identify the folder properties to return.
           FolderResponseShapeType properties = new FolderResponseShapeType();
           PathToUnindexedFieldType ptuft = new PathToUnindexedFieldType();
           ptuft.FieldURI = UnindexedFieldURIType.folderManagedFolderInformation;
           PathToUnindexedFieldType[] ptufts = new PathToUnindexedFieldType[ 1 ] { ptuft };
           properties.AdditionalProperties = ptufts;
           properties.BaseShape = DefaultShapeNamesType.AllProperties;

            // Form the get folder request.
           BaseFolderIdType p_folder = FindFolderID(service, folderName);

           GetFolderType request = new GetFolderType();
           request.FolderIds = new BaseFolderIdType[ 1 ] { p_folder };
           request.FolderShape = properties;

            // Send the request and get the response.
           GetFolderResponseType response = service.GetFolder(request);

           ArrayOfResponseMessagesType aormt = response.ResponseMessages;
           ResponseMessageType[] rmta = aormt.Items;
            foreach (ResponseMessageType rmt in rmta)
           {
                if (rmt.ResponseClass == ResponseClassType.Error)
               {
                    throw new Exception(rmt.MessageText);
               }
                else
               {
                   FolderInfoResponseMessageType firmt;
                   firmt = (rmt as FolderInfoResponseMessageType);
                   BaseFolderType[] folders = firmt.Folders;

                    foreach (BaseFolderType rfolder in folders)
                   {
                        if (rfolder is FolderType)
                       {
                           FolderType myFolder;
                           myFolder = (rfolder as FolderType);
                            if (myFolder.UnreadCountSpecified)
                           {
                               unReadCount = myFolder.UnreadCount;
                           }
                       }
                   }
               }
           }
            return unReadCount;
       }

        public static FolderIdType FindFolderID(ExchangeServiceBinding service, String folderName)
       {
           DistinguishedFolderIdType objSearchRootFolder = new DistinguishedFolderIdType();
           objSearchRootFolder.Id = DistinguishedFolderIdNameType.msgfolderroot;

           FindFolderType requestFindFolder = new FindFolderType();
           requestFindFolder.Traversal = FolderQueryTraversalType.Deep;
           requestFindFolder.ParentFolderIds = new DistinguishedFolderIdType[] { objSearchRootFolder };
           requestFindFolder.FolderShape = new FolderResponseShapeType();
           requestFindFolder.FolderShape.BaseShape = DefaultShapeNamesType.IdOnly;

            // Search filter definition
           requestFindFolder.Restriction = new RestrictionType();

            #region Contains expression

           ContainsExpressionType objContainsExpression = new ContainsExpressionType();
           objContainsExpression.ContainmentMode = ContainmentModeType.FullString;
           objContainsExpression.ContainmentModeSpecified = true ;
           objContainsExpression.ContainmentComparison = ContainmentComparisonType.Exact;
           objContainsExpression.ContainmentComparisonSpecified = true ;

           PathToUnindexedFieldType objFieldFolderName = new PathToUnindexedFieldType();
           objFieldFolderName.FieldURI = UnindexedFieldURIType.folderDisplayName;
           objContainsExpression.Item = objFieldFolderName;

           objContainsExpression.Constant = new ConstantValueType();
           objContainsExpression.Constant.Value = folderName;

            #endregion Contains expression

           requestFindFolder.Restriction.Item = objContainsExpression;

           FindFolderResponseType objFindFolderResponse =
               service.FindFolder(requestFindFolder);

            if (objFindFolderResponse.ResponseMessages.Items.Length == 0 )
                return null ;

            foreach (ResponseMessageType responseMsg in
               objFindFolderResponse.ResponseMessages.Items)
           {
                if (responseMsg.ResponseClass == ResponseClassType.Success)
               {
                   FindFolderResponseMessageType objFindResponse =
                       responseMsg as FindFolderResponseMessageType;
                    foreach (
                       BaseFolderType objFolderType in objFindResponse.RootFolder.Folders)
                   {
                        return objFolderType.FolderId;
                   }
               }
           }
            return null ;
       }

参考文章：Get the Unread count of the Inbox of Exchange 2010/2007, using web services