retriving data in griedviewtextboxcolumn

i am developing windows form and in that windows form i have 1 button 1 griedview & within griedview 1 griedviewcomboboxcolumn & 1 griedviewtextboxcolumn ..i am sucessfully retriving data in griedviewcomboboxcolumn from sql but when i am selecting name from griedviewcomboboxcolumn it does not retriving the price in griedviewtextboxcolumn so how i can solve these problem can any one help me following is the sucessful code for retriving data in griedviewcomboboxcolumn

private void fillcombo()

{

SqlDataAdapter adapter = new SqlDataAdapter();

SqlCommand cmd = new SqlCommand();

DataSet ds = new DataSet();

string sql = ("SELECT Service_Name from Customer_Services");

cmd = new SqlCommand(sql, con);

adapter.SelectCommand = cmd;

adapter.Fill(ds);

dt = ds.Tables[0];

ArrayList row = new ArrayList();

foreach (DataRow dr in dt.Rows)

{

row.Add(dr["Service_Name"].ToString());

}

Service_Name.Items.AddRange(row.ToArray());

}

private void entery_level_Load(object sender, EventArgs e)

{

fillcombo();

}

int rowNumber = 0;
int columnNumber = 0;
textbox1.Text = dataGridView1.Rows[rowNumber].Cells[columnNumber].Value;

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