Hey exports
I dragged a DataGridView on form and it was already successfully connected to database.Then I added a column to DataGridView like this:

DataGridViewCheckBoxColumn aColumn= new DataGridViewCheckBoxColumn();
            aColumn.ThreeState = false;
            dataGridView1.Columns.Add(aColumn );

How can I get the value of this newly added column?I mean I thought there should be certain property like "checked" to examine if a row in DataGridView is checked.But it seems there wasn't. How could it be called "DataGridViewCheckBoxColumn" without even a property like "checked"?It would have made things so much easier.
I wanna update the checked row into database without those unchecked ones....so I need to judge the value of the cell containing DataGridViewCheckedBox to see if it's checked...How can I make it?
"Value" property can be helpful only when I use it like this:
if(dataGridView1.Rows[i].Cells[3].Value.ToString() == "True")
   .......
any easier way?
Thanks for your kind help,I really appreaciate it...kinda urgent,sorry.


ERIC

__________________
ERIC

I haven't worked with this much, but....

I think the cells collect of a row is a collection of base cell types. Your cell 3 may very well be a checkbox cell, but the collection doesn't know that because it has to support all possible cell types. You may be able to cast that cell to a checkbox cell (I don't know the exact syntax) and that class should have a "checked" or similar property.

-Peter

There is an object like "DataGridViewCheckBoxCell".But it still has no property like "checked".
DataGridViewCheckBoxCell acell = (DataGridViewCheckBoxCell)dataGridView1.Rows[i].Cells[3];
.....
I searched online and there is a solution like this:

   If checkBoxCell IsNot Nothing Then
        If checkBoxCell.ValueType.Equals(GetType(Boolean)) Then
            Dim checked As Boolean = CType(checkBoxCell.Value, Boolean)
        Else
            ' checkBoxCell may have 3 states instead.
        End If
    Else
        ' Current cell is not a DataGridViewCheckBoxCell.
    End If

I haven't tried it yet.Maybe it works.But it's still an indirect way,I think!
any other better ways?
LOTS APPRECIATION

ERIC