how to use datagrid for displaying the values in respective combo boxes on clicking particular cell

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C#3.0

.NET3.5

C#

.NET

I am making desktop application using C#.NET and SQL SERVER
I have created form having 2 labels (prospect id and prospect name)with respective comboboxes and used datagrid view...I want that data should be displayed in respective textboxes.I have tried following code but i am not getting data displayed gor prospect_name

SqlConnection con = new SqlConnection("Data Source=SW-PC-20;Initial Catalog=PSM;Integrated Security=True");
            con.Open();

            SqlCommand com = new SqlCommand("select Prospect_ID,Prospect_Name from Filter where Prospect_ID='" + dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex].Value.ToString() + "'", con);
            SqlDataReader dr = com.ExecuteReader();
            if (dr.HasRows)
            {
                dr.Read();
                cboprospectid.Text = dr[0].ToString();
                cboprospectname.Text = dr[1].ToString();
            }
            dr.Close();
            con.Close();

Now problem is prospect name is not displayed for respective prospect id