Question

我在将模型与数据库连接时遇到问题，我正在阅读教程，但任何示例都可以。

我的档案：

网络配置

<?xml version="1.0" encoding="utf-8"?>
<!--
  For more information on how to configure your ASP.NET application, please visit
  http://go.microsoft.com/fwlink/?LinkId=152368
  -->
<configuration>
  <connectionStrings>
    <add name="CancionContext" connectionString="data source=.\SQLEXPRESS;Integrated Security=SSPI;AttachDBFilename=|DataDirectory|Canciones.mdf;User Instance=true" providerName="System.Data.SqlClient" />
  </connectionStrings>
  <appSettings>
    <add key="ClientValidationEnabled" value="true" />
    <add key="UnobtrusiveJavaScriptEnabled" value="true" />
  </appSettings>
  <system.web>
    <compilation debug="true" targetFramework="4.0">
      <assemblies>
        <add assembly="System.Web.Abstractions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
        <add assembly="System.Web.Helpers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
        <add assembly="System.Web.Routing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
        <add assembly="System.Web.Mvc, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
        <add assembly="System.Web.WebPages, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
        <add assembly="System.Data.Entity, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
      </assemblies>
    </compilation>
    <authentication mode="Forms">
      <forms loginUrl="~/Account/LogOn" timeout="2880" />
    </authentication>
    <membership>
      <providers>
        <clear />
        <add name="AspNetSqlMembershipProvider" type="System.Web.Security.SqlMembershipProvider" connectionStringName="ApplicationServices" enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="false" requiresUniqueEmail="false" maxInvalidPasswordAttempts="5" minRequiredPasswordLength="6" minRequiredNonalphanumericCharacters="0" passwordAttemptWindow="10" applicationName="/" />
      </providers>
    </membership>
    <profile>
      <providers>
        <clear />
        <add name="AspNetSqlProfileProvider" type="System.Web.Profile.SqlProfileProvider" connectionStringName="ApplicationServices" applicationName="/" />
      </providers>
    </profile>
    <roleManager enabled="false">
      <providers>
        <clear />
        <add name="AspNetSqlRoleProvider" type="System.Web.Security.SqlRoleProvider" connectionStringName="ApplicationServices" applicationName="/" />
        <add name="AspNetWindowsTokenRoleProvider" type="System.Web.Security.WindowsTokenRoleProvider" applicationName="/" />
      </providers>
    </roleManager>
    <pages>
      <namespaces>
        <add namespace="System.Web.Helpers" />
        <add namespace="System.Web.Mvc" />
        <add namespace="System.Web.Mvc.Ajax" />
        <add namespace="System.Web.Mvc.Html" />
        <add namespace="System.Web.Routing" />
        <add namespace="System.Web.WebPages" />
      </namespaces>
    </pages>
  </system.web>
  <system.webServer>
    <validation validateIntegratedModeConfiguration="false" />
    <modules runAllManagedModulesForAllRequests="true" />
  </system.webServer>
  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-2.0.0.0" newVersion="3.0.0.0" />
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
</configuration>

Cancion.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Data.Entity;

namespace BibliotecaMusica.Models
{
    public class Cancion
    {
        public int ID { get; set; }
        public string Nombre { get; set; }
        public string Autor { get; set; }
    }

    public class CancionContext : DbContext
    {
        public DbSet<Cancion> Canciones { get; set; }
    }
}

CancionesController

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using BibliotecaMusica.Models;

namespace BibliotecaMusica.Controllers
{
    public class CancionesController : Controller
    {

        CancionContext db = new CancionContext();

        public ViewResult Index()
        {
            return View(db.Canciones.ToList());
        }


    }
}

查看CancionesController的索引

 @model IEnumerable<BibliotecaMusica.Models.Cancion>

    @{
        ViewBag.Title = "Index";
    }

    <h2>Index</h2>

    <p>
        @Html.ActionLink("Create New", "Create")
    </p>
    <table>
        <tr>
            <th></th>
            <th>
                Nombre
            </th>
            <th>
                Autor
            </th>
        </tr>

    @foreach (var item in Model) {
        <tr>
            <td>
                @Html.ActionLink("Edit", "Edit", new { id=item.ID }) |
                @Html.ActionLink("Details", "Details", new { id=item.ID }) |
                @Html.ActionLink("Delete", "Delete", new { id=item.ID })
            </td>
            <td>
                @item.Nombre
            </td>
            <td>
                @item.Autor
            </td>
        </tr>
    }

    </table>

已创建数据库 Canciones.mdf ，同时也会创建表 Cancion 。我收到以下异常 EntityCommandExecution未被用户代码处理

在浏览器中，消息为：
无效的对象名称'dbo.Cancions'。描述：执行当前Web请求期间发生未处理的异常。请查看堆栈跟踪，以获取有关错误及其在代码中的起源位置的更多信息。

Exception Details: System.Data.SqlClient.SqlException: Invalid object name 'dbo.Cancions'.

Source Error:


Line 17:         public ViewResult Index()
Line 18:         {
Line 19:             return View(db.Canciones.ToList());
Line 20:         }
Line 21:

我不知道我的项目有什么问题。

Answer 1

我认为您的问题出在您的连接字符串中。检查这个答案

https://stackoverflow.com/a/173375/3467053

或者在服务器资源管理器中，您可以打开与数据库的新连接，并检查wizzard生成的连接字符串。希望这会有所帮助。

将Mvc3项目与数据库连接

1 个答案: