Best method for prevent duplicate entry in SQL database with C# winform

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what is Best method for check prevent duplicate entry in sql database with C# winform application. with sql store procedure code and winform button code.

What I have tried:

i will try in googling and show many video for this issue but confuse what is perfect method for prevent duplicate entry in sql database with C# winform. so please guide me.

Posted 7-Feb-23 18:36pm

kalpeshdelta

Updated 7-Feb-23 18:54pm

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Graeme_Grant 8-Feb-23 0:51am

moved

PIEBALDconsult 8-Feb-23 8:33am

Doing it the wrong way is never the best method.

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Graeme_Grant · Answer 1 · 2023-02-07T18:54:00

You use a unique ID & key fields usually and do data checks.

Here is a free course for learning databases: SQL and Relational Databases 101[^]. Take the time to do this or another course and learn the basics. This is a good investment in time that will save you countless hours of frustration.