Added column should be in the dropdown list

See more:

C#

Hi All,

I have a requirement to read a file and display in datagridview - It's done.

I have a different functionalities like Add a new column to grid and Merge the columns in grid.
When i add a new column to the grid, the column and it's value is adding. Now, if i go and check the dropdown of "Merging 2 columns" (dropdowns), i can't see the newly added column.

Below is my code for ADD COLUMN:

private void btnAddColumn_Click(object sender, EventArgs e)
{
    frmAddColumn fac = new frmAddColumn();
    fac.ShowDialog();

    DataGridViewTextBoxColumn dgvc = new DataGridViewTextBoxColumn();
    dgvc.Name = fac.txtColumnName.Text;
    dgvc.HeaderText = fac.txtColumnName.Text;

    dataGridView1.Columns.Add(dgvc);

    for (int i = 0; i <= dataGridView1.Rows.Count - 1; i++)
    {
        dataGridView1.Rows[i].Cells[fac.txtColumnName.Text].Value = fac.txtColumnValue.Text;
    }
    AddColumn(fac.txtColumnName.Text, fac.txtColumnValue.Text);

}