当用户按下一个按钮时，如何增加变量值？ [英] How do I increament the value of variable on each time when user press next button ?

问题描述

  int  id =  1 ; 
  public  PartialViewResult ViewQuestions（）
 {
 
  string  constr = ConfigurationManager.ConnectionStrings [  DefaultConnection]。ToString（）; 
 GetQuestions getquest =  new  GetQuestions（）; 
  try  
 {
 SqlConnection con =  new  SqlConnection（constr） ; 
 con.Open（）; 
 SqlCommand cmd =  new  SqlCommand（ 选择q.QuestID，q.QImage，q.Question，o.FOption，o.SOption，o.TOption，o.Fruption from QuestionSet as q join OptionSet as o on q.QuestID = o.QuestID where q.QuestID=@questid ，con）; 
 cmd.Parameters.AddWithValue（  @ questid，id）; 
 SqlDataReader dr = cmd.ExecuteReader（）; 
  if （dr.Read（））
 {
 getquest.QuestID = dr.GetInt32（ 0 ）; 
 getquest.QuestImage = dr.GetString（ 1 ）; 
 getquest.Question = dr.GetString（ 2 ）; 
 dr.Close（）; 
 SqlCommand cmd1 =  new  SqlCommand（ 选择Foption，Soption，Toption，来自Optionset的FRoption，其中QuestID = @ questid，con）; 
 cmd1.Parameters.AddWithValue（  @ questid，id）; 
 SqlDataReader dr1 = cmd1.ExecuteReader（）; 
  if （dr1.Read（））
 {
 List< Options> opt =  new 列表< Options>（）; 
 opt.Add（ new 选项{Option1 = dr1.GetString（ 0 ）}）; 
 opt.Add（ new 选项{Option1 = dr1.GetString（ 1 ）}）; 
 opt.Add（ new 选项{Option1 = dr1.GetString（ 2 ）}）; 
 opt.Add（ new 选项{Option1 = dr1.GetString（ 3 ）}）; 
 getquest.Options = opt; 
} 
 dr1.Close（）; 
 
 
} 
 
 
} 
  catch （例外情况）
 {
 
} 
  return  PartialView（getquest）; 
} 
 [HttpPost] 
  public  RedirectToRouteResult Forward（）
 {
 
  int  ID = Convert.ToInt32（Request.Form [  QuestID ]）; 
 id = ID +  1 ; 
 
 
  return  RedirectToAction（  ViewQuestions）; 
} 

我的尝试：



每次用户在视图页面按下一步按钮时，我都会尝试更新id的值。为此分配post方法Forward？



提前致谢。

解决方案

Pass id作为ViewQuestion（）方法的参数。

并且在ex = ach上单击调用ViewQuestion（int id），id =递增值。

将id保留在层后面的代码中

int id=1;
public PartialViewResult ViewQuestions()
        {
            
            string constr = ConfigurationManager.ConnectionStrings["DefaultConnection"].ToString();
            GetQuestions getquest = new GetQuestions();
            try
            {
                SqlConnection con = new SqlConnection(constr);
                con.Open();
                SqlCommand cmd = new SqlCommand("Select q.QuestID,q.QImage,q.Question,o.FOption,o.SOption,o.TOption,o.FROption from QuestionSet as q join OptionSet as o on q.QuestID=o.QuestID where q.QuestID=@questid ", con);
                cmd.Parameters.AddWithValue("@questid", id);
                SqlDataReader dr = cmd.ExecuteReader();
                if (dr.Read())
                {
                    getquest.QuestID = dr.GetInt32(0);
                    getquest.QuestImage = dr.GetString(1);
                    getquest.Question = dr.GetString(2);
                    dr.Close();
                    SqlCommand cmd1 = new SqlCommand("Select Foption,Soption,Toption,FRoption from Optionset where QuestID=@questid ", con);
                    cmd1.Parameters.AddWithValue("@questid", id);
                    SqlDataReader dr1 = cmd1.ExecuteReader();
                    if (dr1.Read())
                    {
                        List<Options> opt = new List<Options>();
                        opt.Add(new Options { Option1 = dr1.GetString(0) });
                        opt.Add(new Options { Option1 = dr1.GetString(1) });
                        opt.Add(new Options { Option1 = dr1.GetString(2) });
                        opt.Add(new Options { Option1 = dr1.GetString(3) });
                        getquest.Options = opt;
                    }
                    dr1.Close();
                    
                    
                }


            }
            catch (Exception ex)
            {

            }
            return PartialView(getquest);
        }
        [HttpPost]
        public RedirectToRouteResult Forward()
        {
            
            int ID = Convert.ToInt32(Request.Form["QuestID"]);
            id = ID + 1;
            
            
            return RedirectToAction("ViewQuestions");
        }

What I have tried:

I try to update the value of id each time when user press the "Next" button from view page . I assign the post method "Forward" for that?

Thanks in advance.

解决方案

Pass id as argument to the ViewQuestion() method.
And on ex=ach click call ViewQuestion(int id) with id= incremented value.
Keep id in code behind layer

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