我正在基于Gmail API构建应用程序。我可以看到当前收件箱中的所有邮件,但是我需要将其限制为仅包含附件的邮件。我怎样才能做到这一点?
这是我的GoogleController.cs:
[HttpGet]
[Authorize]
public async Task<IActionResult> GetListEmail(string LabelId, string nameLabel)
{
string UserEmail = User.FindFirst(c => c.Type == ClaimTypes.Email).Value;
var service = GetService();
List<My_Message> listMessages = new List<My_Message>();
List<Message> result = new List<Message>();
var emailListRequest = service.Users.Messages.List(UserEmail);
emailListRequest.LabelIds = LabelId;
emailListRequest.IncludeSpamTrash = false;
emailListRequest.MaxResults = 1000;
var emailListResponse = await emailListRequest.ExecuteAsync();
if (emailListResponse != null && emailListResponse.Messages != null)
{
foreach (var email in emailListResponse.Messages)
{
var emailInfoRequest = service.Users.Messages.Get(UserEmail, email.Id);
var emailInfoResponse = await emailInfoRequest.ExecuteAsync();
if (emailInfoResponse != null)
{
My_Message message = new My_Message();
message.Id = listMessages.Count + 1;
message.EmailId = email.Id;
foreach (var mParts in emailInfoResponse.Payload.Headers)
{
if (mParts.Name == "Date")
message.Date_Received = mParts.Value;
else if (mParts.Name == "From")
message.From = mParts.Value;
else if (mParts.Name == "Subject")
message.Title = mParts.Value;
}
listMessages.Add(message);
}
}
}
ViewBag.Message = nameLabel;
return View("~/Views/Home/Index.cshtml", listMessages);
}
我认为一个更简单的解决方案是在Users.messages.list
端点中查询而无需创建过滤器。
实际上,您可以q
像在GMail搜索框中那样使用该参数进行查询,如果不熟悉,可以查看整个运算符列表。
实际上,在文档中有一个使用此查询参数的示例:
using Google.Apis.Gmail.v1;
using Google.Apis.Gmail.v1.Data;
using System.Collections.Generic;
// ...
public class MyClass {
// ...
/// <summary>
/// List all Messages of the user's mailbox matching the query.
/// </summary>
/// <param name="service">Gmail API service instance.</param>
/// <param name="userId">User's email address. The special value "me"
/// can be used to indicate the authenticated user.</param>
/// <param name="query">String used to filter Messages returned.</param>
public static List<Message> ListMessages(GmailService service, String userId, String query)
{
List<Message> result = new List<Message>();
UsersResource.MessagesResource.ListRequest request = service.Users.Messages.List(userId);
request.Q = query; // inform this with the right query
do
{
try
{
ListMessagesResponse response = request.Execute();
result.AddRange(response.Messages);
request.PageToken = response.NextPageToken;
}
catch (Exception e)
{
Console.WriteLine("An error occurred: " + e.Message);
}
} while (!String.IsNullOrEmpty(request.PageToken));
return result;
}
// ...
}
因此,对于您的情况,您只需要添加行
emailListRequest.Q = "has:attachment";
在执行请求之前,这样做不会为您的帐户创建一个完整的过滤器,因此,这种情况可能更方便。
非常感谢!做到了!
Raserhin,也许您知道我如何制作超线参考,以便能够下载每个附件?谢谢。