Index was out of range while delete
<p>Why do i get this error(Index was out of range. Must be non-negative and less than the size of the collection.)?</p>

<p>Code :</p>

<pre><code>            object value = dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex ].Value;
            object minus = dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex + 1].Value;
            object delte = dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex + 2].Value;

            if (value is DBNull || minus is DBNull || delte is DBNull) { return; }
            else if (value.Equals("+"))
            {
                produseTableAdapter.PlusCantitate(DateTime.Now, dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex -5].Value.ToString());
                FillData();
                dataGridView1.Rows[e.RowIndex].Selected = true;
            }
            else if (minus.Equals("-"))
            {
                produseTableAdapter.MinusCantitate(DateTime.Now, dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex - 5].Value.ToString());
                FillData();
                dataGridView1.Rows[e.RowIndex].Selected = true;
            }
            else if (delte.Equals("Delete"))
            {
                if (MessageBox.Show("Really ?", "Confirmation", MessageBoxButtons.YesNo, MessageBoxIcon.Exclamation) == DialogResult.Yes)
                {
                    produseTableAdapter.DeleteQuery(dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex - 5].Value.ToString());
                    FillData();
                    dataGridView1.Rows[e.RowIndex].Selected = true;
                }
                else { return; }
            }
</code></pre>

<p>The problem is with the Cells[e.ColumnIndex + 1] &amp;&amp; Cells[e.ColumnIndex + 2]. 
Next cell from object value is another button and next after this is another button. How can i get the indexes of this buttons ?</p>
