Exhange2007 专题（二）通过Web service对Exhange进行二次开发

Exchange2007提供了EWS Managed API和Web Service 两种形式的开发方式。这里主要讲述Web Service形式的开发方式。

Web Service目前还不支持的包括：

1.文件夹关联信息消息；

2.通过代理访问；

3.支持公共文件夹；

4.管理员级别的函数支持（Exchange管理功能）

5.文件夹访问控制；

6.委托管理；

客户端与EWS通信图

 

在VS2010中添加Exchange 2007 Web Service

1.在项目中右击Service References -->点击Add Service References-->点击Advanced-->点击Add Web Reference

2.在URL中输入引用地址：https://domain/EWS/exchange.asmx

3.Add Reference

4.在代码中using Namespace.WebServiceName

下面的例子通过编程获取收件箱中文件夹的ID：

static void Main(string[] args)
{

  // 创建Web Service服务 绑定
  //
  ExchangeServiceBinding binding = new ExchangeServiceBinding();
  binding.Url = @"https://yourserver/ews/exchange.asmx";
  binding.Credentials = new NetworkCredential("username", "password", "domain");

  Dictionary<DistinguishedFolderIdNameType, FolderIdType> mapping;

  // 通过绑定的用户名映射对应的收件箱中文件夹的ID
  //
  mapping = GetAllDistinguishedFolderIds(binding);
  Console.WriteLine("The Id of the inbox is: \r\n" +
               mapping[DistinguishedFolderIdNameType.inbox].Id);
  Console.WriteLine();
  Console.WriteLine("The Id of sentitems is: \r\n" +
               mapping[DistinguishedFolderIdNameType.sentitems].Id);
}

创建 distinguished的文件夹名映射到文件夹的ID

GetAllDistinguishedFolderIds方法

public static Dictionary<DistinguishedFolderIdNameType, FolderIdType>
                 GetAllDistinguishedFolderIds(ExchangeServiceBinding binding)
{
  // 创建请求  //
  GetFolderType getFolderRequest = new GetFolderType();
  getFolderRequest.FolderIds = GetAllDistinguishedFolderIdsForRequest();
  getFolderRequest.FolderShape = new FolderResponseShapeType();


  getFolderRequest.FolderShape.BaseShape = DefaultShapeNamesType.IdOnly;

  // 响应  //
  GetFolderResponseType response = binding.GetFolder(getFolderRequest);
  ResponseMessageType[] responseMessages =
                        response.ResponseMessages.Items;

  Dictionary<DistinguishedFolderIdNameType, FolderIdType> result =
               new Dictionary<DistinguishedFolderIdNameType, FolderIdType>();

  Array enumValues =
               Enum.GetValues(typeof(DistinguishedFolderIdNameType));

  // 遍历每一个消息
  for (int folderIndex = 0;
       folderIndex < responseMessages.Length;
       folderIndex++)
  {
    FolderInfoResponseMessageType folderInfoMessage =
        responseMessages[folderIndex] as FolderInfoResponseMessageType;
    FolderIdType folderId = null;
    if (folderInfoMessage.ResponseClass == ResponseClassType.Success)
    {
      // 获取ID
      folderId = folderInfoMessage.Folders[0].FolderId;
    }

    result.Add(
         (DistinguishedFolderIdNameType)enumValues.GetValue(folderIndex),
         folderId);
  }
  return result;
}

检索所有的文件夹

public static BaseFolderIdType[] GetAllDistinguishedFolderIdsForRequest()
{
  Array enumValues =
    Enum.GetValues(typeof(DistinguishedFolderIdNameType));

  BaseFolderIdType[] result = new BaseFolderIdType[enumValues.Length];
  for (int folderIndex = 0; folderIndex<enumValues.Length; folderIndex++)
  {
    DistinguishedFolderIdType id = new DistinguishedFolderIdType();
    id.Id = (DistinguishedFolderIdNameType)
                  enumValues.GetValue(folderIndex);
    result[folderIndex] = id;
  }

  return result;
}

输出结果：

上述事例讲述了如何通过引用Exchange Web Serivce，获取Exchange中的一些信息，下节我们将围绕Exchange编程开发这一主题进行讲述。