Filter datagridview with researchkey and only show the last five rows .

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The code works when I filter the datagridview with researchkey but I couldn't find the correct format code to show the last 5 rows only.I'm using c# and MySQL database , and a buttonClick to get the filter result .
I wish your help .

What I have tried:

I tried this code but it doesn't work :

bs.Filter = "Convert(matricule_number,'System.String') like '" + textBox.Text + "'   and  ORDER BY (id) DESC" ;

Posted 14-Apr-17 3:07am

EM_Y

Updated 14-Apr-17 10:11am

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Patrice T · Answer 1 · 2017-04-14T10:11:00

Never build an SQL query by concatenating with user inputs, it is named "SQL injection", it is dangerous for your database and error prone.
A single quote in a name and your program crash. If a user input like "Brian O'Conner" can crash your app, it is an SQL injection vulnerability.
SQL injection - Wikipedia[^]
SQL Injection[^]

RickZeeland · Answer 2 · 2017-04-14T09:45:00

Solution 1

I'm not an MySQL expert, but maybe this could be useful:

SELECT * FROM mytable LIMIT 100, 5

Takes 5 records beginning from the position of the 100th record.

Posted 14-Apr-17 9:45am

RickZeeland