Using Event Checkbox in Datagridview

toanhoi bui

Hi eveybody, I want to throw event checkbox in Datagridview is checked
Code my Here:
public int chon = 0;
private void dgvNvHop_CellContentClick(object sender, DataGridViewCellEventArgs e)
{
try
{
if (chon == 0)
{
chon = 1;
dgvNvHop.Rows[e.RowIndex].Cells["Chon"].Value = true;
}
else
{
chon = 0;
dgvNvHop.Rows[e.RowIndex].Cells["Chon"].Value = false;
}
}
catch { }
}

But When I click into a checkbox ,it set true.and after if I remove click it,it set false.But I get all checkbox is values equal true .Checkbox is remove click still values true.I don't understand

4 Replies

Know the answer? Post it — somebody with the same question will find it here.

Suthish Nair15y ago
refer forum
Vulpes15y ago
OK, we know now that it's leaving the eventhandler with the correct value so something later in your code must be setting it back to true. I'd place a breakpoint on this line:

dgvNvHop.Rows[e.RowIndex].Cells["Chon"].Value = false;

and single step from there to see if you can find it.
toanhoi bui15y ago
Yes,Checkbox is true, false but When I find all checkbox is checked is true

if (dgvNvHop.Rows[i].Cells["Chon"].Value != null)
But Result is not correct
Vulpes15y ago
It sounds like something is either resetting the value to true or preventing it from being changed to false in the first place.

To see if we can rule out the second possibility, try this:

private void dgvNvHop_CellContentClick(object sender, DataGridViewCellEventArgs e)
{
try
{
if (chon == 0)
{
chon = 1;
dgvNvHop.Rows[e.RowIndex].Cells["Chon"].Value = true;
}
else
{
chon = 0;
dgvNvHop.Rows[e.RowIndex].Cells["Chon"].Value = false;
}
}
catch { }
MessageBox.Show(dgvNvHop.Rows[e.RowIndex].Cells["Chon"].Value.ToString());
}

Is the DGV data-bound?