代码末尾的标签（以粗体突出显示）不显示从sql server数据库获取的数据，并且在运行代码时为空 . 我试过if（dt.Rows.Count> 0）和var table = ds2.Tables [0]; if（dt.Rows.Count> 0）两者 . 请回复此查询 .
namespace WebApplication1
{
public partial class Response : System.Web.UI.Page
{
SqlCommand cmd = new SqlCommand();
SqlConnection con2 = new SqlConnection();
SqlDataAdapter sda2 = new SqlDataAdapter();
DataSet ds2 = new DataSet();
//in between code
public void showdata()
{
cmd.CommandText = "Select * from signup1 where usid=''"+Session["user"]+"";
cmd.Connection = con2;
sda2.SelectCommand = cmd;
sda2.Fill(ds2);
Label1.Text = "Thank you! Your sign up was successful. Below are the details you entered, please verify:";
**Label2.Text = "First Name: " + ds2.Tables[0].Rows[0]["fname"].ToString();
Label3.Text = "Last Name: " + ds2.Tables[0].Rows[0]["lname"].ToString();
Label4.Text = "UserID: " + ds2.Tables[0].Rows[0]["usid"].ToString();
Label5.Text = "Password: " + ds2.Tables[0].Rows[0]["pswd"].ToString();
Label6.Text = "Email: " + ds2.Tables[0].Rows[0]["eid"].ToString();
Label7.Text = "Security Question: " + ds2.Tables[0].Rows[0]["sq"].ToString();
Label8.Text = "Security Answer: " + ds2.Tables[0].Rows[0]["sa"].ToString();**
}
}
}
}