我正在为我的项目制作一个小型Windows应用程序。我按照Google和本论坛中的一些人的文档编写了一种方法来读取Gmail“INBOX”中的所有Gmail邮件。我可以在其正文部分获取Gmail邮件，但我只能收到5封电子邮件，而不是我的所有电子邮件。我试图使用属性“MaxResult”来设置我想要获得的最大电子邮件，但什么都没发生。
这是我的方法：
private async Task GetMAILs()
{
try
{
UserCredential credential;
using (var stream = new FileStream("client_secret.json", FileMode.Open, FileAccess.Read))
{
credential = await GoogleWebAuthorizationBroker.AuthorizeAsync(
GoogleClientSecrets.Load(stream).Secrets,
// This OAuth 2.0 access scope allows for read-only access to the authenticated
// user's account, but not other types of account access.
new[] { GmailService.Scope.GmailReadonly, GmailService.Scope.MailGoogleCom, GmailService.Scope.GmailModify },
"an thanh",
CancellationToken.None,
new FileDataStore(this.GetType().ToString())
);
}
var gmailService = new GmailService(new BaseClientService.Initializer()
{
HttpClientInitializer = credential,
ApplicationName = this.GetType().ToString()
});
//var request = new UsersResource.MessagesResource.ListRequest(gmailService, "me");
var emailListRequest = gmailService.Users.Messages.List("mymail@gmail.com");
emailListRequest.LabelIds = "INBOX";
//emailListRequest.IncludeSpamTrash = false;
emailListRequest.Q = "in:unread in:inbox";
emailListRequest.MaxResults = 100;
//get our emails
var emailListResponse = await emailListRequest.ExecuteAsync();
if (emailListResponse != null && emailListResponse.Messages != null)
{
//loop through each email and get what fields you want...
foreach (var email in emailListResponse.Messages)
{
//FORM.MessageBox.Show(email.Id);
//var request = new UsersResource.MessagesResource.ListRequest(gmailService, "me");
//IList<Message> messages = request.Execute().Messages;
string from = "";
string date = "";
string subject = "";
string decoded = "";
var emailInfoRequest = gmailService.Users.Messages.Get("mymail@gmail.com",email.Id);
//make another request for that email id...
var emailInfoResponse = await emailInfoRequest.ExecuteAsync();
if (emailInfoResponse != null)
{
//loop through the headers and get the fields we need...
foreach (var mParts in emailInfoResponse.Payload.Headers)
{
if (mParts.Name == "Date")
{
date = mParts.Value;
}
else if (mParts.Name == "From")
{
from = mParts.Value;
}
else if (mParts.Name == "Subject")
{
subject = mParts.Value;
}
}
foreach (var ms_part in emailInfoResponse.Payload.Parts)
{
if (ms_part.MimeType == "text/plain")
{
byte[] data = FromBase64ForUrlString(ms_part.Body.Data);
decoded = Encoding.UTF8.GetString(data);
}
}
}
bd.AppendLine(string.Format("Từ: {0}", from));
bd.AppendLine(subject);
bd.AppendLine(date);
bd.AppendLine("Content: ");
bd.AppendLine(decoded);
bd.AppendLine("-------End-------");
bd.AppendLine("----------------------------------------------------");
//now you have the data you want....
richTextBox1.Text = bd.ToString();
}
}
}
catch (Exception ex)
{
FORM.MessageBox.Show("Failed to get messages!: " + ex.Message, "Failed Messages!", FORM.MessageBoxButtons.OK);
}
}
将二进制数据转换为字符串的方法：
public byte[] FromBase64ForUrlString(string base64ForUrlInput)
{
int padChars = (base64ForUrlInput.Length % 4) == 0 ? 0 : (4 - (base64ForUrlInput.Length % 4));
StringBuilder result = new StringBuilder(base64ForUrlInput, base64ForUrlInput.Length + padChars);
result.Append(String.Empty.PadRight(padChars, '='));
result.Replace('-', '+');
result.Replace('_', '/');
return Convert.FromBase64String(result.ToString());
}
调用任务“GetMAILs（）”的方法：
private void btGet_Click(object sender, EventArgs e)
{
Test2();
}
private async void Test2()
{
await GetMAILs();
}
抱歉，我只是Gmail新手。我将非常感谢所有人的帮助。