Is Their any Way to get the Datagridview selected Column index as well as column values to the Richtext box with same allignment

I am Getting Selected columns index name With addition of "#",after that i am splitting each,here is the code.

public void textboxcontents(string hashedstring)
{
string[] unhash = hashedstring.Split('#');
// List<string>datas =new List<string>();
string te="";
richTextBox1.Clear();
ArrayList indexes = new ArrayList();
foreach (string s in unhash)
{
te = te +"\t"+ s+"\t";
int idx = getColumnIndex(s, dataGridView1.Columns);
if (idx != -1)
{
indexes.Add(idx);
}
}

richTextBox1.AppendText("\t" + "My-Reports" + "\n" + "\n");
richTextBox1.AppendText("------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------"+Environment.NewLine);
richTextBox1.Text = richTextBox1.Text + te + Environment.NewLine;
string data = string.Empty;
foreach (DataGridViewRow row in dataGridView1.Rows)
{
foreach (int idx in indexes)
{
data = data + String.Format("{0}",row.Cells[idx].Value) + "\t" + "\t";
}


richTextBox1.AppendText("\t"+ data + "\n");
data = string.Empty;
}