how to fill textbox with DGV column Content ?

hello

how to fill textbox or richtextbox or combobox with datagridview column content

this is my code

static public void refresh(DataGridView datagridview)

{

try

{

if (Connection.State == ConnectionState.Closed)

Connection.Open();

MySqlDataAdapter dataadapter = new MySqlDataAdapter("SELECT * FROM suTable", Connection);

DataTable dt = new DataTable();

dataadapter.Fill(dt);

datagridview.DataSource = dt;

}

catch (MySqlException Exception)

{

MessageBox.Show(Exception.ToString());

}

finally

{

Connection.Close();

}