SqlStr="select * from table";

SqlConnection conn = new SqlConnection(ConfigurationSettings.AppSettings["ConnectionSql"]);

SqlDataAdapter da = new SqlDataAdapter(SqlStr,conn);
DataSet ds = new DataSet();
da.Fill(ds,"dgTable");
dg1.DataSource=ds.Tables["dgTable"];
dg1.DataBind();

代码里面这句
da.Fill(ds,"dgTable");
中的“dgTable”表示什么意思？？？