无法通过电子邮件从Sharepoint获取用户

Question

我正在尝试通过他的电子邮件ID访问该用户。 但是，即使我能够使用该电子邮件ID登录到Office 365门户，也无法找到用户例外。 这是代码片段：

//Creating Context
Uri webFullUrl = new Uri(URL);
string username = UserName;
string password = Password;
SecureString secureString = new SecureString();
for (int i = 0; i < password.Length; i++)
{
  char c = password[i];
  secureString.AppendChar(c);
}
SharePointOnlineCredentials credentials = new SharePointOnlineCredentials(username, secureString);
ClientContext clientContext = new ClientContext(webFullUrl)
        {
          Credentials = credentials
        };
User user = clientContext.Web.SiteUsers.GetByEmail(email);
clientContext.ExecuteQuery();

执行最后一行时，出现异常User not found 。 有人对如何从电子邮件中获取用户有任何想法吗？ 我只有用户的电子邮件ID。

Answer 1

我找到了解决方案，它是一个两步过程，尽管我无法确定这是否正确。 我的代码如下：

public User GetUserByEmail(ClientContext clientContext, string email)
{
 try
   {
     ClientResult<Microsoft.SharePoint.Client.Utilities.PrincipalInfo> persons =
     Microsoft.SharePoint.Client.Utilities.Utility.ResolvePrincipal(clientContext,                         clientContext.Web, email,
     Microsoft.SharePoint.Client.Utilities.PrincipalType.User,Microsoft.SharePoint.Client.Utilities.PrincipalSource.All, null, true);
     clientContext.ExecuteQuery();
     Microsoft.SharePoint.Client.Utilities.PrincipalInfo person = persons.Value;
     User user = clientContext.Web.SiteUsers.GetByLoginName(person.LoginName);
     clientContext.ExecuteQuery();
     return user;
   }
   catch
   {
     return null;
   }

}

我从Here给出的摘录中得到了帮助。