getting the value of all the cells (Gridview)

protected void Button1_Click(object sender, EventArgs e)
{
    // Iterates through the rows of the GridView control
    foreach (GridViewRow row in GridView1.Rows)
    {
        // Selects the text from the TextBox
        // which is inside the GridView control
        string textBoxText = _
          ((TextBox)row.FindControl("TextBox1")).Text;
      
        // Selects the text from the DropDownList
        // which is inside the GridView control
        string dropDownListText = ((DropDownList)
           row.FindControl("DropDownList1")).SelectedItem.Value;
       
    }
}