.NET 8升级Microsoft.Graph NuGet后DeltaResponse等过时问题咨询

云原生阿岚

2026-6-29

Microsoft Graph SDK 5.42.0中Delta相关过时API的替代方案

你遇到的DeltaResponse和DeltaRequestBuilder.GetAsync()过时警告，是因为SDK在5.x版本迭代中，将通用Delta响应类替换为资源特定的Delta响应类，针对邮件消息场景，对应的替代项如下：

核心替换规则

通用类DeltaResponse → 资源特定类MessageDeltaResponse
通用类DeltaRequestBuilder → 资源特定类MessageDeltaRequestBuilder
过时的GetAsync()方法 → 使用MessageDeltaRequestBuilder中的同名重载（自动匹配返回MessageDeltaResponse）

修改后的完整代码

public string GetMailFromUserMailbox(string upn, string mailbox, Func<Message, bool> iterator, string? delta = null)
{
    var messages = new List<Message>();

    MessageDeltaRequestBuilder drb;
    if (!string.IsNullOrWhiteSpace(delta))
        drb = new MessageDeltaRequestBuilder(delta, Client.RequestAdapter);
    else
    {
        var mailboxId = GetUserMailBoxId(upn, mailbox);
        drb = Client.Users[upn].MailFolders[mailboxId].Messages.Delta;
    }

    var t = drb.GetAsync();
    t.Wait();

    var pageIterator = PageIterator<Message, MessageDeltaResponse?>.CreatePageIterator(
        Client,
        t.Result ?? new MessageDeltaResponse(),
        iterator
    );
    var pt = pageIterator.IterateAsync();
    pt.Wait();

    return pageIterator.Deltalink;
}