DataGridView

[Guest]

Hi,

I'm having some trouble with my DataGridView. I have it bound to a
DataTable. One column of the grid is a boolean that says whether a row
should be visible. There is also a checkbox outside of the grid that toggles
whether or not the marked rows should be displayed or not.

The problem happens as follows: The toggle is set so that all rows are
displayed. The user checks a new row to become invisible. The user stays on
that row. He then clicks the toggle to hide the marked rows. I get an error
having to do with the currency manager that says I can't make a row that I'm
on invisible.

I was thinking that all I needed to do was put code in the toggle that first
moved off of that row. I couldn't seem to do that.

I've never worked with the currency manager before and did not do anything
with it in this situation.

Can anyone suggest anything?

Art

 

[Sam Malone]

I suspect others will jump in here with a much better answer but I seem to
recall (dim recesses of my brain) that the "Currency Manager" error is
bogus. If I'm correct, the real error has nothing to do with "Currency
Manager" so try looking for an error in saving some other invalid or
incompatible data. Sorry I can't be of any better assistance but my memory
fails me at the moment wrt more detail.

 

[Cor Ligthert [MVP]]

Sam,

Are you sure of your message. I have the idea that you are mixing this up
with concurrency.

For me it sounds obvious that the currency manager comes in trouble if the
current item is changing. It is showed and has not to be showed.

However, withouth any code from Art how he makes it invisible there is in my
opinion no help possible. He describes for me at least his question to
vague.

Cor

 

[Sam Malone]

Firstly, I tried to make it clear that I was anything but sure (I was having
a senior's moment this morning) but no I'm not confusing it with
CONcurrency.
I do (finally) recall that I got that type of error when I was trying to
store a number like 1234.5678 in a field defined as Double(10,2). In other
words trying to store a number with four decimal places into a field
deefined as only allowing two. It wasn't a "Currency" field, per se but I
guess someone (or something) might have "thought" it was.
In my case the "number" I was trying to store in the database (10,2) field
was the result of a calculation.
For example if I had used something like:

Dim New_datavalue as double (note no precision defined)
New_Datavalue = 4/3 - the result of which, of course is
1.3333333333333333333333333... (for as many decimal places as VB defaults to
if you don't specify)
Update <table>, Set <field> = New_Datavalue - and <field> was defined with
a precision of 2 decimal places.
then I would get the error - and it would "claim" to be a Currency Manager
error.

However if I rounded the result of the 4/3 math to two decimal places, it
would work.

I didn't actually issue the "Update" statement shown above. It was being
done through a data bound grid. I show the Update statement as an
illustration of the equivalent of what the grid would accomplish.

Obviously I have NO idea if this is the cause of Art's problem but sometimes
it makes sense to try what doesn't make sense since what makes sense isn't
working. Could it be that, coincident with doing what he knows he's
attempting to do, there's other data from another cell that is the real
culprit in a situation like I've described above?