使用 lumisoft 开发邮箱管理工具时，需要删除邮件，在imap_client_app示例程序中，代码执行正常。但是在应用到项目中时，总是无法实现删除。也无法触发事件。删除方法代码如下：
/// <summary>
/// Deletes specified message.
/// </summary>
/// <param name=”uid”>Message UID.</param>
private void DeleteMessage(long uid)
{
this.Cursor = Cursors.WaitCursor;
try{
/* NOTE: In IMAP message deleting is 2 step operation.
* 1) You need to mark message deleted, by setting “Deleted” flag.
* 2) You need to call Expunge command to force server to dele messages physically.
*/
IMAP_t_SeqSet sequence_set = IMAP_t_SeqSet.Parse(uid.ToString());
m_pImap.StoreMessageFlags(true,sequence_set,IMAP_Flags_SetType.Add,new IMAP_t_MsgFlags(new string[]{IMAP_t_MsgFlags.Deleted}));
m_pImap.Expunge();
}
catch(Exception x){
MessageBox.Show(this,”Error: ” + x.Message,”Error:”,MessageBoxButtons.OK,MessageBoxIcon.Error);
}
this.Cursor = Cursors.Default;
}
删除成功时会触发如下事件
/// <summary>
/// This method is called when IMAP server has expunged specified message.
/// </summary>
/// <param name=”sender”>Sender.</param>
/// <param name=”e”>Event data.</param>
private void m_pImap_MessageExpunged(object sender,EventArgs<IMAP_r_u_Expunge> e)
{
if(m_pTabPageMail_Messages.Items.Count >= e.Value.SeqNo){
m_pTabPageMail_Messages.Items.RemoveAt(e.Value.SeqNo – 1);
}
}
经过多次Google未果，最后发现了和示例的区别，本人项目在删除邮件前并未选中邮件所在的相应文件夹，即m_pImap.SelectFolder();