求助大神，为什么在线考试模块抓取不了数据！
这段代码有问题吗？
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
public partial class _Default : System.Web.UI.Page
{
private RadioButton[] testBtn1 = new RadioButton[10];
private RadioButton[] testBtn2 = new RadioButton[10];
private RadioButton[] testBtn3 = new RadioButton[10];
private RadioButton[] testBtn4 = new RadioButton[10];
private static int[] rightAns = new int[10];
private int score = 0;
public void Page_Load(object sender, EventArgs e)
{
SqlConnection con = new SqlConnection("server=WANGSNOW;database=TestOnline;user id=sa;pwd=root");
con.Open();
SqlCommand cmd = new SqlCommand("select max(id) from XZ_test", con);
int maxTestID = (int)cmd.ExecuteScalar();
int[] testIDs = new int[10];
Random rand = new Random();
String testContent = "";
String ans1 = "";
String ans2 = "";
String ans3 = "";
String ans4 = "";
String testID = "";
for (int i = 0; i < 10; i++)
{
int j = rand.Next(1, maxTestID);
int k = 0;
cmd = new SqlCommand("select id from XZ_test where id=" + j, con);
while (cmd.ExecuteScalar() == null)
{
j = rand.Next(1, maxTestID);
cmd = new SqlCommand("select id from XZ_test where id=" + j, con);
}
while (k <= i)
{
cmd = new SqlCommand("select id from XZ_test where id=" + j, con);
if (j == testIDs[k] || cmd.ExecuteScalar()==null)
{
j = rand.Next(1,maxTestID);
k = 0;
}
else
{
k++;
}
}
Literal l = new Literal();
Literal l1 = new Literal();
cmd = new SqlCommand("select testContent from XZ_test where id=" + j, con);
testContent = (String)cmd.ExecuteScalar();
cmd = new SqlCommand("select testAns1 from XZ_test where id=" + j, con);
ans1 = (String)cmd.ExecuteScalar();
cmd = new SqlCommand("select testAns2 from XZ_test where id=" + j, con);
ans2 = (String)cmd.ExecuteScalar();
cmd = new SqlCommand("select testAns3 from XZ_test where id=" + j, con);
ans3 = (String)cmd.ExecuteScalar();
cmd = new SqlCommand("select testAns4 from XZ_test where id=" + j, con);
ans4 = (String)cmd.ExecuteScalar();
l.Text = i + 1 + "." + testContent + "<br>";
testBtn1[i] = new RadioButton();
testBtn2[i] = new RadioButton();
testBtn3[i] = new RadioButton();
testBtn4[i] = new RadioButton();
testBtn1[i].GroupName = "g" + i;
testBtn1[i].Text = "A、" + ans1 + " ";
testBtn1[i].ID = "testBtn1" + i;
testBtn2[i] = new RadioButton();
testBtn2[i].GroupName = "g" + i;
testBtn2[i].Text = "B、" + ans2 + " ";
testBtn2[i].ID = "testBtn2" + i;
testBtn3[i] = new RadioButton();
testBtn3[i].GroupName = "g" + i;
testBtn3[i].Text = "C、" + ans3 + " ";
testBtn3[i].ID = "testBtn3" + i;
testBtn4[i] = new RadioButton();
testBtn4[i].GroupName = "g" + i;
testBtn4[i].Text = "D、" + ans4 + " ";
testBtn4[i].ID = "testBtn4" + i;
Panel1.Controls.Add(l);
Panel1.Controls.Add(testBtn1[i]);
Panel1.Controls.Add(testBtn2[i]);
Panel1.Controls.Add(testBtn3[i]);
Panel1.Controls.Add(testBtn4[i]);
l1.Text = "<br><br>";
Panel1.Controls.Add(l1);
testIDs[i] = j;
}
if (!IsPostBack)
{
for (int i = 0; i < 10; i++)
{
cmd = new SqlCommand("select rightAns from XZ_test where id=" + testIDs[i], con);
rightAns[i] = (int)cmd.ExecuteScalar();
}
}
Button b = new Button();
b.Text = "提交";
b.Click += new System.EventHandler(this.b_click);
Literal lc = new Literal();
Literal lc1 = new Literal();
lc.Text = "<center>";
lc1.Text = "</center>";
Panel1.Controls.Add(lc);
Panel1.Controls.Add(b);
Panel1.Controls.Add(lc1);
con.Close();
}
public void b_click(object sender, EventArgs e)
{
for (int i = 0; i < 10; i++)
{
if (testBtn1[i].Checked)
{
if (rightAns[i] == 1)
{
score += 5;
}
}
else if (testBtn2[i].Checked)
{
if (rightAns[i] == 2)
{
score += 5;
}
}
else if (testBtn3[i].Checked)
{
if (rightAns[i] == 3)
{
score += 5;
}
}
else if(testBtn4[i].Checked)
{
if (rightAns[i] == 4)
{
score += 5;
}
}
}
Response.Redirect("result.aspx?score=" + score);
}
}
