Mysql AutoInc & C# data column AutoInc.

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dear sir

now i have a problem and searched a lot and did not find any working solution ,

now i have table with ID column which Primary Key & Auto Increment
now if the current ID is 5 and i enter a row then i deleted it , so the next new ID should be 7 not 6 OK but the VS 2005 C# after using databinding.addnew() the c# get the last ID which 5 and inc. it by one so it will be 6 not 7 so how the sync between Mysql Autoinc & C# autoinc

Posted 17-May-11 20:30pm

AhmedOsamaMoh

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OriginalGriff · Answer 1 · 2011-05-17T20:40:00

No. It doesn't work like that. When you generate a new autonumber, it is assigned the next number - it will never re-use old numbers. There are two reasons:

1) In the situation you describe, you create records with ID 3, 4, and 5. You then delete 4. If the next record is given an ID of 4, what value do you give the following one? Logically, it should be 5, again!

2) It doesn't know that you haven't used the ID to refer to that record in a different table: if it re-allocates the ID to a previously used value, then all those other-table records will now refer to a diffent user!