不知道如何将转换对象结果转换为通用列表 [英] Dont know how to convert convert object result into generic list

问题描述

大家好



新的Generic，我不知道如何兑换这个

 public partial class Student 
 {
 public int Id {get;组; } 
公共字符串StudentCode {get;组; } 
 public string StudentName {get;组; } 
 public string Department {get;组; } 
 public string Address {get;组; } 
} 

 public virtual ObjectResult< sp_StudentDetails_Result> sp_StudentDetails（字符串操作）
 {
 var actionParameter = action！= null？ 
 new ObjectParameter（Action，action）：
 new ObjectParameter（Action，typeof（string））; 
 
 return（（IObjectContextAdapter）this）.ObjectContext.ExecuteFunction< sp_StudentDetails_Result>（sp_StudentDetails，actionParameter）; 
} 
 

现在我尝试了这一个

列表< Student> student = new List< Student>（）; 
使用（StudentEntities myDBEnty = new StudentEntities（））
 {
 student = myDBEnty.Students.ToList（）; 
 student = myDBEnty.sp_StudentDetails（SELECT）; 
} 
返回Json（学生，JsonRequestBehavior.AllowGet）; 
 

我想要退货，我收到的错误就像

严重级代码描述项目文件行抑制状态
错误CS0029无法隐式转换类型'System.Data.Entity.Core.Objects.ObjectResult< WebApplication2.Models.Data.sp_StudentDetails_Result>'到'System.Collections.Generic.List< WebApplication2.Models.Data.Student>'WebApplication2 E：\ MVV Test \ WebApplication2 \ WebApplication2 \Controllers \HomeController.cs 46 Active 

怎么做这个



谢谢



我尝试了什么：



在谷歌上搜索并做了一些样本我无法成功

解决方案

我有一段时间没有使用EF工作，但是可以为POCO（Plain Old Clr Objects）生成包装代码，所以需要重新制作。



否则，更改：

 student = myDBEnty.sp_StudentDetails（  SELECT）; 

To ：

  var  result = myDBEnty.sp_StudentDetails（  SELECT）; 

并在之后设置断点。现在使用Locals窗口查看 result 变量的内容。现在您可以看到需要完成哪些工作。



这是一个很好的资源： entityframeworktutorial.net [ ^ ]

Hi All

Am new in Generic , i dont know how to convert this one

public partial class Student
    {
        public int Id { get; set; }
        public string StudentCode { get; set; }
        public string StudentName { get; set; }
        public string Department { get; set; }
        public string Address { get; set; }
    }

public virtual ObjectResult<sp_StudentDetails_Result> sp_StudentDetails(string action)
       {
           var actionParameter = action != null ?
               new ObjectParameter("Action", action) :
               new ObjectParameter("Action", typeof(string));

           return ((IObjectContextAdapter)this).ObjectContext.ExecuteFunction<sp_StudentDetails_Result>("sp_StudentDetails", actionParameter);
       }

now i tried with this one

List<Student> student = new List<Student>();
           using (StudentEntities myDBEnty = new StudentEntities())
           {
               student = myDBEnty.Students.ToList();
               student = myDBEnty.sp_StudentDetails("SELECT");
           }
          return Json(student, JsonRequestBehavior.AllowGet);

and i want to return and i got error like

Severity	Code	Description	Project	File	Line	Suppression State
Error	CS0029	Cannot implicitly convert type 'System.Data.Entity.Core.Objects.ObjectResult<WebApplication2.Models.Data.sp_StudentDetails_Result>' to 'System.Collections.Generic.List<WebApplication2.Models.Data.Student>'	WebApplication2	E:\MVC Test\WebApplication2\WebApplication2\Controllers\HomeController.cs	46	Active

how to do this one

Thanks

What I have tried:

tried in googling and did some sample i can't make it

解决方案

I have not done work with EF for a while but it was possible to generate code to wrap for POCOs (Plain Old Clr Objects) so do recasting was required.

Otherwise, change:

student = myDBEnty.sp_StudentDetails("SELECT");

To:

var result = myDBEnty.sp_StudentDetails("SELECT");

and set a breakpoint after. Now use the Locals window to view the contents of result variable. Now you can see what work needs to be done.

This is a good resource for you: entityframeworktutorial.net[^]

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