跟踪读者面前的TagId [英] Tracing apperence of TagId infront of reader

问题描述

我正在使用桌面应用程序和使用RFID阅读器，就像任何条形码阅读器一样，当标签放在前面或阅读器的范围内时，它从标签中读取TagId，它开始读取标签并将值存储在数据库中（Supppose ，1AC7B这是读者正在读取的TagId，当Tag在RFID读取器的范围内时它会连续读取这个标签，当它移开时停止读取它，读取器每秒读取TagId）现在每个

时间它读取标签并将此TagID添加到ListBox，并显示当前日期和时间

列表框

1AC7B

1AC7B

1AC7B

1AC7B

现在我想跟踪特定标签ID的持续时间，当标签进入RFID阅读器的范围并离开阅读器时，请帮助我如何实现这个

1的想法是在数据库中存储带有日期时间的TagId，但这失败了，因为当Tag再次进入阅读器范围时它再次开始读取TagId并将其存储在数据库中这导致歧义所以请你好请问我如何通过编程来实现这一点，以便跟踪Tag在阅读器范围内的持续时间

I am working on Desktop application and Using RFID Reader which is like any bar-code reader which read TagId from Tags when a Tag is Placed in front or in Range of reader it start reading that Tag and store value in database (Supppose, 1AC7B this is TagId which reader is reading, it read this tag continuously when Tag is in range of RFID reader and stop reading it when it move away , Reader read TagId per second) Now each
time it read Tag and add this TagID to ListBox with current Date and Time
Listbox
1AC7B
1AC7B
1AC7B
1AC7B
now i want to trace the duration of Particular Tag Id means when Tag comes in range of RFID reader and move away from the reader so please help me how can i achieve this
1 idea is that store TagId with datetime in database but this fails because when Tag again come in range of reader it again start reading TagId and store this in database this cause ambiguity so please help me how can i achieve this via programming so to trace the time duration when Tag is in range of Reader

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