How I can check on the update button

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i have a blood bank management system i want to restrict the blood Doner till 3 months which means that he can not give blood before three months or his record can not be updated till three months in vb.net

What I have tried:

i did not try any thing because i have no idea how and what to do. I am new to vb.net and i am working on this project please some one tell me or help me in vb.net

Posted 24-Jun-21 20:49pm

Member 14649324

Updated 24-Jun-21 21:21pm

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Wendelius 25-Jun-21 2:59am

If you already have the system then details about that system would be needed to answer you're question. Based on the information you're provided we cannot know where and how the data is stored or how it could be queried.

Member 14649324 25-Jun-21 3:06am

i have a window form that take the doner name Age adress and save them in the database. then i retrive them in datagridview for updating with an update button. the record is saved with date. so when i want to update his name age and date again it can not update his records untill three months because for a doner can not give blood again in three months

2 solutions

Solution 1

I'd add a column to the DB: "ElegibleOn" which holds a DATETIME - the Date that he is next allowed to give blood.
When he tries to register to donate, check the appointment date against the DB ElegileOn" date and only allow it if the appointment as after that.

When you register his donation, update the ElegibleOn column to the current date plus the three month cooldown period.

Posted 24-Jun-21 21:20pm

OriginalGriff

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Maciej Los · Accepted Answer · 2021-06-24T21:21:00

Solution 2

This sounds pretty trivial:
1. Get the latest doner's visit date
2. Compare this date with today's date
3. If the difference is greater than 3 months, then allow some actions. If not, then disallow.

Posted 24-Jun-21 21:21pm

Maciej Los

Comments

Member 14649324 25-Jun-21 3:27am

Thank you so much got an idea

Maciej Los 25-Jun-21 3:32am

You're very welcome.