?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;
using System.Text.RegularExpressions;
using System.IO;

public partial class Student_UnitEx_ShowReadExercise : System.Web.UI.Page
{

    //主要的變量
    public static String[] strAnswer = new String[20];//答案
    public int TestNumber = 4;//題量,閱讀4道
    public int QuesNumber = 5;//每題的問題數量
    public static 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")
        {
            LabName.Text = "姓名："+Session["USERNAME"].ToString();
            StrUserID = Session["USERID"].ToString();
            StrUserName = Session["USERNAME"].ToString();
        }
        else
        {
            Dialog("對不起，你沒有權限訪問這個頁面！");
            Response.Redirect("~/SystemManage/Login.aspx");
        }
        if (!IsPostBack)
        {
            strHard = Request.QueryString["deep"];
            if (strHard == null) strHard = "4";//=
            String[] MainKey = getMainKey("TAB_TESTREAD", "TRGRADE", strHard);
            if (MainKey.Length < TestNumber)
            {
                Dialog(MainKey[0]);//題庫題量不夠
            }
            lstReadBindData(MainKey);
            QueBindData(MainKey);
            RdBindData(MainKey);
        }
    }

    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>");
    }
    //
    //主要功能：對滿足難度要求的題目隨機抽取,某些行等于一字符串，并隨機取一行，返回該行主鍵值
    //主要作用：用于要求隨機生成若干個互不相同的隨機數
    //
    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, "getTestRead");
            DataTable Table = myDateSet.Tables[0];
            int i = Table.Rows.Count;
            if (i < TestNumber)
            {
                TestNumber = i;//題庫題目太少，出不了一張完整的試卷!
            }
            int[] a;//聲明一個數組用來接收返回的隨機數
            a = getRandomNum(TestNumber, 0, i + 1);//從0-(i-1)中產生4個不一樣的數裝入數組a中            
            for (int j = 0; j < TestNumber; j++)
            {
                strMainKey[j] = (String)Table.Rows[a[j] - 1].ItemArray[0];
            }
        }
        finally
        {
            myConnection.Close();
        }
        return strMainKey;
    }
    //產生真正的隨機數
    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;
    }
    //產生一組隨機數
    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;
    }

    //主要功能：實現對TextBox控件的數據綁定
    //主要作用：用于大量數據的顯示
    //
    public void lstReadBindData(String[] Str)
    {
        SqlConnection myConnection = new SqlConnection(ConnectionString);
        try
        {
            String TableName = "TAB_TESTREAD";
            String ColumnName1 = "TRCONTENT";
            String ColumnName2 = "TRNO";
            TextBox[] txtRead ={ TxtRead1, TxtRead2, TxtRead3, TxtRead4 };
            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];
                txtRead[i].Text = readData(strTmp);
            }
        }
        finally
        {
            myConnection.Close();
        }
    }
    //將問題數據綁定上去
    public void QueBindData(String[] Str)
    {
        SqlConnection myConnection = new SqlConnection(ConnectionString);
        try
        {
            String TableName = "TAB_TESTREADKEY";
            String ColumnName1 = "TRQESTION";
            String ColumnName2 = "TRNO";
            String ColumnName3 = "QNO";
            String[] strQno ={ "1", "2", "3", "4", "5" }; //Str[0] = "1";
            TextBox[] txtAnswer ={ txtAnswer1, txtAnswer2, txtAnswer3, txtAnswer4, txtAnswer5, txtAnswer6, txtAnswer7, txtAnswer8, txtAnswer9, txtAnswer10, txtAnswer11, txtAnswer12, txtAnswer13, txtAnswer14, txtAnswer15, txtAnswer16, txtAnswer17, txtAnswer18, txtAnswer19, txtAnswer20 };
            for (int i = 0; i < TestNumber; i++)
                for (int j = 0; j < QuesNumber; j++)
                {
                    String conString = "SELECT " + ColumnName1 + " FROM " + TableName + " where " + ColumnName2 + "='" + Str[i] + "'and " + ColumnName3 + "='" + strQno[j] + "'";
                    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 * QuesNumber + j].Text = strTmp;
                }
        }
        finally
        {
            myConnection.Close();
        }
    }
    public void RdBindData(String[] Str)
    {
        SqlConnection myConnection = new SqlConnection(ConnectionString);
        try
        {
            String TableName = "TAB_TESTREADKEY";
            String ColumnName1 = "A";
            String ColumnName2 = "B";
            String ColumnName3 = "C";
            String ColumnName4 = "D";
            String ColumnName5 = "TRNO";
            String ColumnName6 = "QNO";
            String ColumnName7 = "TRKEY";
            String[] strQno ={ "1", "2", "3", "4", "5" }; //Str[0] = "1";
            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 };
            for (int i = 0; i < 4; i++)
                for (int j = 0; j < QuesNumber; j++)
                {
                    String conString = "SELECT " + ColumnName1 + "," + ColumnName2 + "," + ColumnName3 + "," + ColumnName4 + "," + ColumnName7 + " FROM " + TableName + " where " + ColumnName5 + "='" + Str[i] + "'and " + ColumnName6 + "='" + strQno[j] + "'";
                    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 * QuesNumber + j] = "題為空";
                        continue;
                    }
                    for (int k = 0; k < 4; k++)
                    {
                        Rd[i * QuesNumber + j].Items[k].Value = strOption[k] + (String)Table.Rows[0].ItemArray[k];
                    }
                    strAnswer[i * QuesNumber + j] = (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 };
        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" };

        for (int i = 0; i < 20; 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 < 20; i++)
        {
            Session[strAn[i]] = strAnswer[i];
        }
        String sParam = "?strHard=" + strHard;
        Response.Redirect("ShowReadExerciseGrade.aspx" + sParam);
    }
    public String readData(String FileName)
    {
        String ss = "";
        String A = Server.MapPath("Exercise.asps");
        String delimStr = "Wed";
        string[] sArray = Regex.Split(A, delimStr, RegexOptions.None);
        int j = 0;
        String[] str = new string[2];
        foreach (string filePath in sArray)
        {
            str[j] = filePath.ToString(); j++;
        }
        try
        {
            FileStream fs = new FileStream(str[0] + "\\Wed\\SubjectManage\\Read\\" + FileName, FileMode.Open);
            StreamReader sr = new StreamReader(fs);
            ss = sr.ReadToEnd();
            sr.Close();
        }
        catch (Exception ex)
        {
            Console.Write(ex);
        }
        return ss;
    }

    protected void BtnReturn_Click(object sender, EventArgs e)
    {
        Response.Redirect("~/SystemManage/Main.aspx");
    }
}