我的MVC Create View甚至试图在插入表单输入值之前尝试插入db中

问题描述

| 我的“创建”页面基本上是一种形式，其经过硬编码以匹配作为我的QuestionModel一部分的插入语句中的参数。我的代码如下：

        public string Create(int Poll_ID,int User_ID,int QuestionGroup,int QuestionType,string Text,int PartialAnswers,int Max,int QOrder,string DataType)
    {
        //int Permission = CheckPermissionMethod(Poll_ID,User_ID); //user permission id
        int Permission = 3;
        string Result; // message shown to user
        int MaxQuestion_ID;
        OleDbDataReader OleDbDataReader;
        OleDbDataReader myOleDbDataReader;
        if (Permission == 3)
        {
            if (QuestionGroup < 3) //MCQ or Participant List Question
            {
                //get the maximum question id
                OleDbDataReader = DBConn(\"SELECT MAX(Question_ID) \\\"Question_ID\\\" FROM MCQ_QUESTIONS\");
                OleDbDataReader.Read();
                MaxQuestion_ID = Convert.ToInt32(OleDbDataReader[\"Question_ID\"]) + 1;

            myOleDbConnection.Close();
            Result = \"Question was added to your poll! \";
        }
        else
            Result = \"You are not permitted to create a question.\";
        return Result;
    }

这是我的模型下QuestionModel的一部分。

         <% using (Html.BeginForm(\"Index\",\"Question\",FormMethod.Post)) { %>
     <% if (!string.IsNullOrEmpty((string) ViewData[\"ErrorMessage\"])) { %>
          Poll_Id: <%= Html.TextBox(\"Poll_Id\")%><br />
      User_Id: <%= Html.TextBox(\"User_Id\")%><br />
      QuestionGroup: <%= Html.TextBox(\"QuestionGroup\")%><br />
      QuestionType: <%= Html.TextBox(\"QuestionType\")%><br />
      Text: <%= Html.TextBox(\"Text\")%><br />
      PartialAnswers: <%= Html.TextBox(\"PartialAnswers\")%><br />
      Max: <%= Html.TextBox(\"Max\")%><br />
      QOrder: <%= Html.TextBox(\"QOrder\")%><br />
      DataType: <%= Html.TextBox(\"DataType\")%><br />
      <input type=\"submit\" value=\"Submit\" />

我的问题控制器如下：

        public ActionResult Create()
    {
        QuestionModel Question = new QuestionModel();
        int Poll_Id = Convert.ToInt32(TempData[\"Poll_Id\"]);
        int User_Id = Convert.ToInt32(TempData[\"User_Id\"]);
        int QuestionGroup = Convert.ToInt32(TempData[\"QuestionGroup\"]);
        int QuestionType = Convert.ToInt32(TempData[\"QuestionType\"]);
        string Text = Convert.ToString(TempData[\"Text\"]);
        int PartialAnswers = Convert.ToInt32(TempData[\"PartialAnswers\"]);
        int Max = Convert.ToInt32(TempData[\"Max\"]);
        int QOrder = Convert.ToInt32(TempData[\"QOrder\"]);
        string DataType = Convert.ToString(TempData[\"DataType\"]);

        Question.Create(Poll_Id,User_Id,QuestionGroup,QuestionType,Text,PartialAnswers,Max,QOrder,DataType);



        return View();
    }

    public ActionResult Submit()
    {
        TempData[\"Poll_Id\"] = Convert.ToInt32(Request.Form[\"Poll_Id\"]);
        TempData[\"User_Id\"] = Convert.ToInt32(Request.Form[\"User_Id\"]);
        TempData[\"QuestionGroup\"] = Convert.ToInt32(Request.Form[\"QuestionGroup\"]);
        TempData[\"QuestionType\"] = Convert.ToInt32(Request.Form[\"QuestionType\"]);
        TempData[\"Text\"] = Request.Form[\"Text\"];
        TempData[\"PartialAnswers\"] = Convert.ToInt32(Request.Form[\"PartialAnswers\"]);
        TempData[\"Max\"] = Convert.ToInt32(Request.Form[\"Max\"]);
        TempData[\"QOrder\"] = Convert.ToInt32(Request.Form[\"QOrder\"]);
        TempData[\"DataType\"] = Request.Form[\"DataType\"];
        //return RedirectToAction(\"Create\");
        ViewData[\"Poll_Id\"] = \"Setting the values\";
        return View();
     }

    }

我的第一个路线条目如下：

            routes.MapRoute(
           \"Question\",// Route name
           \"{controller}/{action}/{id}\",// URL with parameters
           new { controller = \"Question\",action = \"Index\",id = \"\" }  // Parameter defaults
       );

我只希望能够看到我的html表单，输入值，单击“提交”，然后页面将创建相应的条目并将其插入到我的MCQ_Questions表中。任何帮助都非常感谢你们！     

解决方法

您通常如何实现此目标是通过 有两个单独的“ 4”动作 用

[HttpGet]

装饰一个。在这里，您只需使用默认模型返回视图 用ѭ6装饰另一个。如果验证通过，则在此处插入数据库并返回“ 7”操作，否则返回带有错误的视图。     ,我建议您将ViewModel制作为一个类。

public class CreateViewModel
{
public int Poll_id = {get ; set;}
//...
}

//View would look like (inherits from CreateViewModel)
<%: Html.TextBoxFor(m => m.Poll_id) %>

//Controller
public ActionResult Create()
{
CreateViewModel newCreateView= new CreateViewModel();
return View(newCreateView);
}
[HttpPost]
public ActionResult Create(CreateViewModel newCreateView)
{
//Put code to save all into database here
return RedirectToAction(\"Index\");
}

将数据写入视图后，它将汇总您的数据。