无法取得dataset

DataSet ds;
DataTable dt, dt2;
protected void Page_Load(object sender, EventArgs e)
{
if(!ispostback)
{
printrows();
}
}

//绑定gridview
private void printrows()
{
string sqlstr = ConfigurationManager.AppSettings["sqlconn"];
SqlConnection conn = new SqlConnection(sqlstr);
conn.Open();
string sqlcommd = "select * from users";
SqlDataAdapter da = new SqlDataAdapter(sqlcommd,conn);
ds = new DataSet();
da.Fill(ds);
dt = ds.Tables[0];
GridView1.DataSource = dt;
GridView1.DataBind();
DataList1.DataSource = dt;
DataList1.DataBind();
}
//绑定detailview
protected void GridView1_SelectedIndexChanging(object sender, GridViewSelectEventArgs e)
{
/

无法取得dataset 关于dataset DataSet ds = new DataSet(); 诺基亚7360无法和电脑取得连接 C# Sql 和DataSet 如何修改Dataset? dataset.table[0].select() .net,DataSet的问题。 DataSet中的DataRow DataSet.Row是怎么回事？