?using System;
using System.Data;
using System.Configuration;
using System.Collections;
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.Sql;
using System.Data.SqlClient;

public partial class Student_UnitEx_ShowSyntaxExercise : System.Web.UI.Page
{
    public String[] strAnswer = new String[30];//答案
    public int TestNumber = 30;//題量,語(yǔ)法30道
    String strHard;//難度
    public static readonly string ConnectionString =
        ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
    String StrUserID; String StrUserName;
    protected void Page_Load(object sender, EventArgs e)
    {

        if (Session["USERSTYLE"] == "STUDENT")
        {
            StrUserID = Session["USERID"].ToString();
            StrUserName = Session["USERNAME"].ToString();
        }
        else
        {
            Dialog("對(duì)不起，你沒有權(quán)限訪問(wèn)這個(gè)頁(yè)面！");
            Response.Redirect("~/SystemManage/Login.aspx");
        }
        strHard = Request.QueryString["deep"];
        if (strHard == null) strHard = "2";
        String[] MainKey = getMainKey("TAB_TESTSYNTAX", "TSGRADE", strHard);
        if (MainKey.Length < TestNumber)
        {
            Dialog(MainKey[0]);//題庫(kù)題量不夠
        }
        QuesBindData(MainKey);
        RdBindData(MainKey);
    }
    
    //主要功能：對(duì)滿足難度要求的題目隨機(jī)抽取,某些行等于一字符串，并隨機(jī)取一行，返回該行主鍵值
    //主要作用：用于要求隨機(jī)生成若干個(gè)互不相同的隨機(jī)數(shù)
    //
    public String[] getMainKey(String TableName, String ColumnName, String Str)
    {
        SqlConnection myConnection = new SqlConnection(ConnectionString);
        String conString = "SELECT * FROM " + TableName + " where " + ColumnName + "='" + Str + "'";
        String[] strMainKey = new String[TestNumber];
        try
        {
            SqlDataAdapter myAdapter = new SqlDataAdapter(conString, myConnection);
            DataSet myDateSet = new DataSet();
            myAdapter.MissingSchemaAction = MissingSchemaAction.AddWithKey;
            myAdapter.Fill(myDateSet, "getTestSyntax");
            DataTable Table = myDateSet.Tables[0];
            int i = Table.Rows.Count;
            if (i < TestNumber)
            {
                TestNumber = i;//題庫(kù)題目太少，出不了一張完整的試卷!
            }
            int[] a;//聲明一個(gè)數(shù)組用來(lái)接收返回的隨機(jī)數(shù)
            a = getRandomNum(TestNumber, 0, i + 1);//從0-(i-1)中產(chǎn)生TestNumber個(gè)不一樣的數(shù)裝入數(shù)組a中            
            for (int j = 0; j < TestNumber; j++)
            {
                strMainKey[j] = (String)Table.Rows[a[j] - 1].ItemArray[0];
            }
        }
        finally
        {
            myConnection.Close();
        }
        return strMainKey;
    }
    //產(chǎn)生真正的隨機(jī)數(shù)
    public int getNum(int[] arrNum, int tmp, int minValue, int maxValue, Random ra)
    {
        bool IsRan = false;
        while (!IsRan)
        {
            int n;
            for (n = 0; n <= arrNum.Length - 1; n++)
            {
                if (arrNum[n] == tmp)
                {
                    tmp = ra.Next(minValue, maxValue);
                    break;
                    //getNum(arrNum, tmp, minValue, maxValue, ra);
                }
            }
            if (n == arrNum.Length)
                IsRan = true;
        }
        return tmp;
    }
    //產(chǎn)生一組隨機(jī)數(shù)
    public int[] getRandomNum(int num, int minValue, int maxValue)
    {
        Random ra = new Random(unchecked((int)DateTime.Now.Ticks));
        int[] arrNum = new int[num];
        int tmp = 0;
        for (int i = 0; i <= num - 1; i++)
        {
            tmp = ra.Next(minValue, maxValue);
            arrNum[i] = getNum(arrNum, tmp, minValue, maxValue, ra);
        }
        return arrNum;
    }

    private void Dialog(String Str)
    {
        Response.Write(@"<script type='text/JavaScript'>");
        Response.Write(@"alert('" + Str + "');");
        //Response.Write(@"window.location='./list_logingroup.aspx';");
        Response.Write(@"</script>");
    }
    //將問(wèn)題數(shù)據(jù)綁定上去
    public void QuesBindData(String[] Str)
    {
        SqlConnection myConnection = new SqlConnection(ConnectionString);
        try
        {
            String TableName = "TAB_TESTSYNTAX";
            String ColumnName1 = "TSCONTENT";
            String ColumnName2 = "TSNO";
            TextBox[] txtAnswer ={ txtAnswer1, txtAnswer2, txtAnswer3, txtAnswer4, txtAnswer5, txtAnswer6, txtAnswer7, txtAnswer8, txtAnswer9, txtAnswer10, txtAnswer11, txtAnswer12, txtAnswer13, txtAnswer14, txtAnswer15, txtAnswer16, txtAnswer17, txtAnswer18, txtAnswer19, txtAnswer20, txtAnswer21, txtAnswer22, txtAnswer23, txtAnswer24, txtAnswer25, txtAnswer26, txtAnswer27, txtAnswer28, txtAnswer29, txtAnswer30 };
            for (int i = 0; i < TestNumber; i++)
            {
                String conString = "SELECT " + ColumnName1 + " FROM " + TableName + " where " + ColumnName2 + "='" + Str[i] + "'";
                SqlDataAdapter da = new SqlDataAdapter(conString, myConnection);
                DataSet ds = new DataSet();
                da.Fill(ds);
                DataTable Table = ds.Tables[0];
                if (Table.Rows.Count == 0)
                    continue;
                String strTmp = (String)Table.Rows[0].ItemArray[0];
                txtAnswer[i].Text = strTmp;
            }
        }
        finally
        {
            myConnection.Close();
        }
    }
    public void RdBindData(String[] Str)
    {
        SqlConnection myConnection = new SqlConnection(ConnectionString);
        try
        {
            String TableName = "TAB_TESTSYNTAX";
            String ColumnName1 = "A";
            String ColumnName2 = "B";
            String ColumnName3 = "C";
            String ColumnName4 = "D";
            String ColumnName5 = "TSNO";
            String ColumnName6 = "TSKEY";
            String[] strOption ={ "A.", "B.", "C.", "D." };
            RadioButtonList[] Rd ={ Rd1, Rd2, Rd3, Rd4, Rd5, Rd6, Rd7, Rd8, Rd9, Rd10, Rd11, Rd12, Rd13, Rd14, Rd15, Rd16, Rd17, Rd18, Rd19, Rd20, Rd21, Rd22, Rd23, Rd24, Rd25, Rd26, Rd27, Rd28, Rd29, Rd30 };
            for (int i = 0; i < 30; i++)
            {
                String conString = "SELECT " + ColumnName1 + "," + ColumnName2 + "," + ColumnName3 + "," + ColumnName4 + "," + ColumnName6 + " FROM " + TableName + " where " + ColumnName5 + "='" + Str[i] + "'";
                SqlDataAdapter da = new SqlDataAdapter(conString, myConnection);
                DataSet ds = new DataSet();
                da.Fill(ds);
                DataTable Table = ds.Tables[0];
                if (Table.Rows.Count == 0)
                {
                    strAnswer[i] = "題為空";
                    continue;
                }
                for (int k = 0; k < 4; k++)
                {
                    Rd[i].Items[k].Value = strOption[k] + (String)Table.Rows[0].ItemArray[k];
                }
                strAnswer[i] = (String)Table.Rows[0].ItemArray[4];
            }
        }
        finally
        {
            myConnection.Close();
        }
    }
    protected void BltNext_Click(object sender, EventArgs e)
    {
        RadioButtonList[] Rd ={ Rd1, Rd2, Rd3, Rd4, Rd5, Rd6, Rd7, Rd8, Rd9, Rd10, Rd11, Rd12, Rd13, Rd14, Rd15, Rd16, Rd17, Rd18, Rd19, Rd20, Rd21, Rd22, Rd23, Rd24, Rd25, Rd26, Rd27, Rd28, Rd29, Rd30 };
        String[] strOption ={ "A", "B", "C", "D" };
        String[] strAn ={ "test1", "test2", "test3", "test4", "test5", "test6", "test7", "test8", "test9", "test10", "test11", "test12", "test13", "test14", "test15", "test16", "test17", "test18", "test19", "test20", "test21", "test22", "test23", "test24", "test25", "test26", "test27", "test28", "test29", "test30"};
        for (int i = 0; i < 30; i++)
        {
            int j;
            for (j = 0; j < 4; j++)
            {
                if (Rd[i].Items[j].Selected)
                {
                    strAnswer[i] += "&" + strOption[j];
                    break;
                }
            }
            if (j == 4)
                strAnswer[i] += "&" + "未選";
        }
        Session.Clear();
        Session["USERSTYLE"] = "STUDENT";
        Session["USERID"] = StrUserID;
        Session["USERNAME"] = StrUserName;
        for (int i = 0; i < 30; i++)
        {
            Session[strAn[i]] = strAnswer[i];
        }
        String sParam = "?strHard=" + strHard;
        Response.Redirect("ShowSyntaxExerciseGrade.aspx" + sParam);
    }
    protected void BtnReturn_Click(object sender, EventArgs e)
    {
        Response.Redirect("~/SystemManage/Main.aspx");
    }
}