I have a datagridview with a DataTable as Datasource. 

One value in the select-Statement is build like this: value1 + '|' + value2 as value.

I use the values for different things: First value is the string to be shown, based on the second value i set the background-color of the cell... (works fine with the paint method of the cell).

Now I have a form which is shown by the onMouseClick-Event. From here i can set new values and write them back to the DB, and then i want to set the new value to the current Cell to redraw the cell with the new value, but its readonly. I don't need to save the value from here to the db, its  already done.

If your answer includes virtual mode, please remember that i have to call a form to edit data. (I have looked at this, but i don't know  if this is really that what i want. )

phil

I have done it.

I don't have set a Datasource to the grid.
I have done it manually.

e.g:

while dr.read

newRow = datagridview.Rows.add

datagridview.Rows(NewRow).Cells("id").Value = dr.Item("id")

end while

now its like a "offline recordset"

(not a working example!)

phil

Why not try DataGridView.Refresh() or DataGridView.Invalidate? If the datatable has already been changed, if its not already refreshing automatically, it shoud.

However, if your datatable is not automatically refreshing with the database, try recalling whatever function you called to load it, and then call refresh or invalidate to make the dgv display the updated data.