I have a WCF service mapped to 1 hardware device (printer). I want to lock/unlock the printer by client.
Is there a way to make a single instance of that service and also have session enabled? so i can get current user's session id? e.g OperationContext.Current.SessionID ? (sav开发者_如何学运维e it in a private field so i can sync access to the hardware device)
Thanks!
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It seems to me Apple won\'t allow this, but I need to make sure. For an app we\'re building, we want to ask the user to enter payment information (including credit card details) to pay for tickets. T
I need to generate an XML output using Perl code.I\'m trying not to use any libraries,as it\'s very simple, temporary XML that gets used by another step in the process.
是否在对方手机上显示已读，是由用户自行设置的。依次打开iPhone的“设置-信息”，会有一个“发送已读回执”的选项。将其打开，对方就能看到你，是否已经阅读了本条iMessage信息。将其关闭，对方就看不到。
微信重新建群怎么开发者_Go百科建？ 产品名称：苹果手机 产品型号：iPhone 11 系统版本：iOS 13
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