Question

我正在使用SQL服务器，我有以下2个数据库表：

现在我想要从DB显示问题以及答案。但下一个要显示的问题将取决于之前的问题的答案。

假设Q1用户选择YES - ＆gt; Q2将出现在下一个。

但是如果用户选择NO - > Q3会出现。

以下是我的代码：

public partial class Recommendation : System.Web.UI.Page
{
    SqlConnection con = new SqlConnection();
    DataTable dt = new DataTable();
    int rowIndex = 0;
    int QuesIndex = 0;
    protected void Page_Load(object sender, EventArgs e)
    {
        con.ConnectionString = (ConfigurationManager.ConnectionStrings["RecommendationConnectionString"].ConnectionString);
        con.Open();
        PopulateDataTable();

        if (!IsPostBack)
        {
            if (dt.Rows.Count > 0)
            {
                Label2.Text = dt.Rows[0]["Question"].ToString();
                HiddenField2.Value = dt.Rows[QuesIndex]["Question_ID"].ToString();
                HiddenField1.Value ="1";
            }
            BindList();
            //QuesIndex++;
        }
        if (Request.Form["HiddenField1"] != null)

            rowIndex = Convert.ToInt32(Request.Form["HiddenField1"].ToString());

        if (rowIndex == dt.Rows.Count && rowIndex != 0)
        {
            rowIndex = 0;
            HiddenField1.Value = Convert.ToInt32(0).ToString();
        }
        con.Close();
    }

    private void BindList()
    {
        DataSet DS1 = new DataSet();

        string command = "Select ID, Answers from Question_Answer where Ques_ID = '" + HiddenField2.Value + "'";
        //command.Parameters.AddWithValue("@Ques_ID", Ques_ID);
        SqlDataAdapter dataAdaptor = new SqlDataAdapter(command, con);        
        dataAdaptor.Fill(DS1);
        RadioButtonList1.DataSource = DS1;
        RadioButtonList1.DataTextField = "Answers";
        RadioButtonList1.DataValueField = "ID";
        RadioButtonList1.DataBind();
    }

     private void PopulateDataTable()
    {
        DataSet ds = new DataSet();
        SqlCommand cmd = new SqlCommand("Select Question_ID, Question from Questionnaire", con);
        cmd.CommandType = CommandType.Text;
        SqlDataAdapter sDA = new SqlDataAdapter();
        sDA.SelectCommand = cmd;
        sDA.Fill(ds, "Questionnaire");                      
        dt = ds.Tables[0];
    }

    protected void Button1_Click(object sender, EventArgs e)
    {
        if (dt.Rows.Count > 0)
        {
            Label2.Text = dt.Rows[rowIndex]["Question"].ToString();
            HiddenField2.Value = dt.Rows[QuesIndex ["Question_ID"].ToString();
            rowIndex++;
            QuesIndex++;
            HiddenField1.Value = rowIndex.ToString();
        }
        Session["QnA"] = HiddenField2.Value;      
      }

此代码只是从Db调查问卷中获取问题1。但我希望根据用户之前的答案显示下一个问题。

我该怎么做？

根据用户先前的选择从数据库中检索下一条记录

0 个答案: