I want to update informations about persons in a datagrid?

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persons details listed in datagrid and all information comes from mysql.

I want to click a button and all person information should update by one by one. But it doesn't work. 1st person's information is updated successfully but from 2nd person it doesn't work and gives connection open error.

j=2;
row = grid1.Rows - 1;
for(i=1;i<row;i++)>
{
string id=grid1.cells(i,j).text;//this text contains person id

connection.open();
write sql query
..............
..............
..........where personid=id
connection.close();
}

Posted 31-May-10 22:51pm

Member-2338430

Updated 31-May-10 23:51pm

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OriginalGriff · Answer 1 · 2010-05-31T23:08:00

Move the connection open and close outside the loop.

But why are you doing it that way anyway? Why not submit a single query for all person ids, and loop through that? Fewer connections to db, less (potential) network traffic, more obvious code...

SELECT ... FROM ... WHERE personid IN ("one", "two", "three"...)