Question

I bind a DataGridView to a (List of ‘Payment’ objects) collection, I am using RowsAdded Event to Change the back color of the row depending on the status of the payment.
I am using (row.DefaultCellStyle.BackColor) to change the back color, But If I changed the color of the First row, then the color of the second row will be changed also, even though I did NOT change its back color.
and I don’t want to change its back color to (white) because there are some columns that have their own colors.

private void dgvPayment_RowsAdded(object sender, DataGridViewRowsAddedEventArgs e)
        {

            DataGridViewRow row = dgvPayment.Rows[e.RowIndex];
            Payment  lPayment = row.DataBoundItem as Payment;
            if (lPayment != null)
                if (lPayment.IsLocked)
                {
                    row.DefaultCellStyle.BackColor = Color.LightPink;
                    row.ReadOnly = true;
                }
        }

how to solve this ?

you can download the source code for here .

Answer 1

the problem is that when I put the backColor to white, the whole row will become white,I don’t want this , because there are a column(s) which have its own backColor.

As mentioned here (datagridview-defaultcellstyle-rows-and-columns-priority) :

It’s probably something internal to DataGridViews, where row styles
override column styles either explicitly or because row styles are
applied on top of column styles.

In addition to setting default styles for the first row and first
column, try setting the first cell’s style directly, which will
override ANY default, whether for row or column.

So I Solved it like this;

private void dgvPayment_RowsAdded(object sender, DataGridViewRowsAddedEventArgs e)
        {
            for (int index = e.RowIndex; index <= e.RowIndex + e.RowCount - 1; index++)
            {
                DataGridViewRow row = dgvPayment.Rows[index];
                Payment lPayment = row.DataBoundItem as Payment;
                if (lPayment != null && lPayment.IsLocked)
                {
                    row.DefaultCellStyle.BackColor = Color.Pink;
                    row.ReadOnly = true;
                }
                else
                {
                    row.DefaultCellStyle = null;
                    row.ReadOnly = false;
                }


            }
        }