MVC3：編譯器錯誤消息：CS0103：當前上下文中不存在名稱'model'

Question

我想在剃刀視圖中使用我的模型，並且收到上述指定的錯誤。在包含@model關鍵字的MVC3中生成的默認代碼（Account \ ChangePassword.cshtml，...等）工作正常，只有我的新視圖出現問題。

我在CSHTML文件代碼如下：

@model VidLib.Models.LogedInUsersModel 


@{ 
    ViewBag.Title = "LogedInUsers"; 
} 

<h2>LoggedInUsers</h2> 

@foreach (MembershipUser user in model.GetUsers()) 
{ 
    <p>Name: @user.UserName 
    </p> 
} 

我的模型代碼如下：

using System; 
using System.Collections.Generic; 
using System.ComponentModel; 
using System.Linq; 
using System.Web; 
using System.Web.Mvc; 
using System.Web.Security; 
using System.ComponentModel.DataAnnotations; 

namespace VidLib.Models 
{ 
    public class LogedInUsersModel 
    { 
     public MembershipUserCollection GetUsers() 
     { 
      return Membership.GetAllUsers(); 
     } 

    } 

} 

我得到的錯誤如下：

Server Error in '/VTest' Application. 
-------------------------------------------------------------------------------- 

Compilation Error 
Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately. 

Compiler Error Message: CS0103: The name 'model' does not exist in the current context 

Source Error: 



Line 8: <h2>LoggedInUsers</h2> 
Line 9: 
Line 10: @foreach (MembershipUser user in model.GetUsers()) 
Line 11: { 
Line 12: <p>Name: @user.UserName 


Source File: d:\test projects\VidLib\VidLib\Views\Administrator\LogedInUsers.cshtml Line: 10 



Show Detailed Compiler Output: 


C:\WINDOWS\system32> "C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319\csc.exe" /t:library /utf8output /R:"C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.Web.Routing\v4.0_4.0.0.0__31bf3856ad364e35\System.Web.Routing.dll" /R:"C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System\v4.0_4.0.0.0__b77a5c561934e089\System.dll" /R:"C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.Web.ApplicationServices\v4.0_4.0.0.0__31bf3856ad364e35\System.Web.ApplicationServices.dll" /R:"C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\vtest\9fce5a68\47e852d4\assembly\dl3\81c380d9\4b4be05b_5ff0cc01\VidLib.DLL" /R:"C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.Web.Helpers\v4.0_1.0.0.0__31bf3856ad364e35\System.Web.Helpers.dll" /R:"C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319\mscorlib.dll" /R:"C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.Configuration\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Configuration.dll" /R:"C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.Drawing\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Drawing.dll" /R:"C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.ServiceModel\v4.0_4.0.0.0__b77a5c561934e089\System.ServiceModel.dll" /R:"C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.ComponentModel.DataAnnotations\v4.0_4.0.0.0__31bf3856ad364e35\System.ComponentModel.DataAnnotations.dll" /R:"C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\vtest\9fce5a68\47e852d4\App_global.asax.4-dk6yw3.dll" /R:"C:\WINDOWS\Microsoft.Net\assembly\GAC_32\System.Data\v4.0_4.0.0.0__b77a5c561934e089\System.Data.dll" /R:"C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.Data.DataSetExtensions\v4.0_4.0.0.0__b77a5c561934e089\System.Data.DataSetExtensions.dll" /R:"C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.Core\v4.0_4.0.0.0__b77a5c561934e089\System.Core.dll" /R:"C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.Web.DynamicData\v4.0_4.0.0.0__31bf3856ad364e35\System.Web.DynamicData.dll" /R:"C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.Runtime.Serialization\v4.0_4.0.0.0__b77a5c561934e089\System.Runtime.Serialization.dll" /R:"C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.WorkflowServices\v4.0_4.0.0.0__31bf3856ad364e35\System.WorkflowServices.dll" /R:"C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\vtest\9fce5a68\47e852d4\assembly\dl3\09b97a44\38235bb7_32e5cc01\EntityFramework.DLL" /R:"C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.Web.Services\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Web.Services.dll" /R:"C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\Microsoft.CSharp\v4.0_4.0.0.0__b03f5f7f11d50a3a\Microsoft.CSharp.dll" /R:"C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.ServiceModel.Activities\v4.0_4.0.0.0__31bf3856ad364e35\System.ServiceModel.Activities.dll" /R:"C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.ServiceModel.Web\v4.0_4.0.0.0__31bf3856ad364e35\System.ServiceModel.Web.dll" /R:"C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.Web.Mvc\v4.0_3.0.0.0__31bf3856ad364e35\System.Web.Mvc.dll" /R:"C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.Activities\v4.0_4.0.0.0__31bf3856ad364e35\System.Activities.dll" /R:"C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.Web.Abstractions\v4.0_4.0.0.0__31bf3856ad364e35\System.Web.Abstractions.dll" /R:"C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.Data.Entity\v4.0_4.0.0.0__b77a5c561934e089\System.Data.Entity.dll" /R:"C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.Xml.Linq\v4.0_4.0.0.0__b77a5c561934e089\System.Xml.Linq.dll" /R:"C:\WINDOWS\Microsoft.Net\assembly\GAC_32\System.Web\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.Web.dll" /R:"C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.Web.WebPages\v4.0_1.0.0.0__31bf3856ad364e35\System.Web.WebPages.dll" /R:"C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.IdentityModel\v4.0_4.0.0.0__b77a5c561934e089\System.IdentityModel.dll" /R:"C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.Web.Extensions\v4.0_4.0.0.0__31bf3856ad364e35\System.Web.Extensions.dll" /R:"C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.Xml\v4.0_4.0.0.0__b77a5c561934e089\System.Xml.dll" /R:"C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.Web.WebPages.Deployment\v4.0_1.0.0.0__31bf3856ad364e35\System.Web.WebPages.Deployment.dll" /R:"C:\WINDOWS\Microsoft.Net\assembly\GAC_MSIL\System.ServiceModel.Activation\v4.0_4.0.0.0__31bf3856ad364e35\System.ServiceModel.Activation.dll" /R:"C:\WINDOWS\Microsoft.Net\assembly\GAC_32\System.EnterpriseServices\v4.0_4.0.0.0__b03f5f7f11d50a3a\System.EnterpriseServices.dll" /out:"C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\vtest\9fce5a68\47e852d4\App_Web_logedinusers.cshtml.e8fa2554.wfm-mxw5.dll" /D:DEBUG /debug+ /optimize- /w:4 /nowarn:1659;1699;1701 /warnaserror- "C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\vtest\9fce5a68\47e852d4\App_Web_logedinusers.cshtml.e8fa2554.wfm-mxw5.0.cs" "C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\vtest\9fce5a68\47e852d4\App_Web_logedinusers.cshtml.e8fa2554.wfm-mxw5.1.cs" 


Microsoft (R) Visual C# 2010 Compiler version 4.0.30319.1 
Copyright (C) Microsoft Corporation. All rights reserved. 

d:\test projects\VidLib\VidLib\Views\Administrator\LogedInUsers.cshtml(10,34): error CS0103: The name 'model' does not exist in the current context 





Show Complete Compilation Source: 


Line 1: #pragma checksum "D:\test projects\VidLib\VidLib\Views\Administrator\LogedInUsers.cshtml" "{406ea660-64cf-4c82-b6f0-42d48172a799}" "1D2E7C5249B30EC171BB04A575153072" 
Line 2: //------------------------------------------------------------------------------ 
Line 3: // <auto-generated> 
Line 4: //  This code was generated by a tool. 
Line 5: //  Runtime Version:4.0.30319.1 
Line 6: // 
Line 7: //  Changes to this file may cause incorrect behavior and will be lost if 
Line 8: //  the code is regenerated. 
Line 9: // </auto-generated> 
Line 10: //------------------------------------------------------------------------------ 
Line 11: 
Line 12: namespace ASP { 
Line 13:  using System; 
Line 14:  using System.Collections.Generic; 
Line 15:  using System.IO; 
Line 16:  using System.Linq; 
Line 17:  using System.Net; 
Line 18:  using System.Web; 
Line 19:  using System.Web.Helpers; 
Line 20:  using System.Web.Security; 
Line 21:  using System.Web.UI; 
Line 22:  using System.Web.WebPages; 
Line 23:  using System.Web.Mvc; 
Line 24:  using System.Web.Mvc.Ajax; 
Line 25:  using System.Web.Mvc.Html; 
Line 26:  using System.Web.Routing; 
Line 27:  
Line 28:  
Line 29:  public class _Page_Views_Administrator_LogedInUsers_cshtml : System.Web.Mvc.WebViewPage<VidLib.Models.LogedInUsersModel> { 
Line 30:   
Line 31: #line hidden 
Line 32: 
Line 33:   
Line 34:   public _Page_Views_Administrator_LogedInUsers_cshtml() { 
Line 35:   } 
Line 36:   
Line 37:   protected ASP.global_asax ApplicationInstance { 
Line 38:    get { 
Line 39:     return ((ASP.global_asax)(Context.ApplicationInstance)); 
Line 40:    } 
Line 41:   } 
Line 42:   
Line 43:   public override void Execute() { 
Line 44: 
Line 45: WriteLiteral("\r\n\r\n"); 
Line 46: 
Line 47: 
Line 48:    
Line 49:    #line 4 "D:\test projects\VidLib\VidLib\Views\Administrator\LogedInUsers.cshtml" 
Line 50:  
Line 51:  ViewBag.Title = "LogedInUsers"; 
Line 52: 
Line 53: 
Line 54:    
Line 55:    #line default 
Line 56:    #line hidden 
Line 57: WriteLiteral(" \r\n<h2>LoggedInUsers</h2>\r\n\r\n"); 
Line 58: 
Line 59: 
Line 60:    
Line 61:    #line 10 "D:\test projects\VidLib\VidLib\Views\Administrator\LogedInUsers.cshtml" 
Line 62: foreach (MembershipUser user in model.GetUsers()) 
Line 63: { 
Line 64: 
Line 65:    
Line 66:    #line default 
Line 67:    #line hidden 
Line 68: WriteLiteral(" <p>Name: "); 
Line 69: 
Line 70: 
Line 71:    
Line 72:    #line 12 "D:\test projects\VidLib\VidLib\Views\Administrator\LogedInUsers.cshtml" 
Line 73:   Write(user.UserName); 
Line 74: 
Line 75:    
Line 76:    #line default 
Line 77:    #line hidden 
Line 78: WriteLiteral(" \r\n </p>\r\n"); 
Line 79: 
Line 80: 
Line 81:    
Line 82:    #line 14 "D:\test projects\VidLib\VidLib\Views\Administrator\LogedInUsers.cshtml" 
Line 83: } 
Line 84: 
Line 85:    
Line 86:    #line default 
Line 87:    #line hidden 
Line 88: WriteLiteral("\r\n"); 
Line 89: 
Line 90: 
Line 91:   } 
Line 92:  } 
Line 93: } 
Line 94: 





-------------------------------------------------------------------------------- 
Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.1 

Answer 1

檢查您的視圖（LogedInUsers.cshtml）文件中的代碼。 它的模式，而不是模擬

@foreach（用戶的MembershipUser在Model.GetUsers（））{

Answer 2

有我的應用程序的兩個問題。

1）模型應該在View中使用，而不是像Mik-Mark建議的那樣使用模型。 2）我必須將我的模型傳遞給控制器​​中的View，我沒有這樣做。

[Authorize(Roles = "Admin")] 
public ActionResult LogedInUsers() 
{ 
     var model = new LogedInUsersModel(); 
     return View(model); 
} 

Answer 3

我假設你從模型中返回多條記錄。我沒有嘗試模型綁定到一個方法，我不知道它的工作原理。我會嘗試一個屬性。該模型

public class User 
{ 
    public int UserId { get; set; } 
    public string UserName { get; set; } 
} 

視圖模型

public class UserViewModel { get; set; } 
{ 
    public List<User> UserList { get; set; } 
} 

控制器

DBContext db = new DBContext(); 

public ViewResult() 
{ 
    List<Users> users = db.Users.Where(m => m.LoggedIn == true).ToList(); 

    UserViewModel userVM = new UserViewModel(); 

    userVM.UserList = users; 

    return View(userVM); 
} 

視圖

@model MyUserApp.ViewModels.UserViewModel 

foreach(User u in Model.Users) 
{ 
    Name: @u.UserName<br/> 
} 

嘗試結合特性，而不是方法。您還應該考慮綁定到ViewModel，而不是綁定到數據庫的Model。將視圖直接綁定到數據存儲模型或存儲庫時，您將模型緊密耦合到視圖。然後模型綁定到視圖和數據庫（假設您正在使用實體框架和數據註釋）。當您嘗試根據視圖和數據庫驗證一個模型時，這可能會導致大量數據驗證錯誤。例如，如果這些屬性添加到模型

[Required(ErrorMessage="User name is required")] 
[StringLenth(50)] // this causes validation against the database and the view 
public string UserName { get; set; } 

作爲一項規則，使用數據註釋屬性來幫助定義模型中的數據庫，然後做視圖模型UI驗證。如果您將相同的屬性添加到視圖模型，則僅針對視圖進行驗證。