位置0处没有任意行,求解！
protected void Page_Load(object sender, EventArgs e)
  {
  DataSet ds = GetData();
  if (!IsPostBack)
  {
  if (ds.Tables[0].Rows.Count > 0)
  {
  int k = ds.Tables[0].Rows.Count;//这句是我为了找错误的原因而写的，快速监视k=14；
  DataTable companyname = new DataTable();
  companyname.Columns.Add("Company", System.Type.GetType("System.String"));//创建列并给列取名和指定类型
  for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
  {
  if (ds.Tables[0].Rows[i]["Company"] != null && Convert.ToString(ds.Tables[0].Rows[i]["Company"]) != "")
  {
  companyname.Rows[i]["Company"] = ds.Tables[0].Rows[i]["Company"];
  }
  }
  DropDownList1.DataSource = companyname.DefaultView;
  DropDownList1.DataTextField = "Company";
  DropDownList1.DataValueField = "Company";
  }
  }
  }

  public DataSet GetData()
  {
  string connectionString = ConfigurationManager.ConnectionStrings["DiscountConnectionString"].ConnectionString;
  SqlConnection conn = new SqlConnection(connectionString);
  conn.Open();
  SqlDataAdapter adapter = new SqlDataAdapter("select Company from Protection", conn);
  DataSet dataset = new DataSet();
  adapter.Fill(dataset);
  conn.Close();
  return dataset;
  }

------解决方案--------------------
companyname 只看到你新增列了，
没有看到你新增行，
没有添加行，当然不能操作