Question

我正在开发一个笑话网络应用程序。

我使用C＃，Entity Framework，MVC，我做代码优先。

现在，当我尝试读取数据库中的某些内容时，我在标题中显示的错误显示出来。我不知道该寻找什么。我抬头看谷歌，但我没有得到答案......

我尝试提供您需要知道的所有代码：

public class Context : DbContext
{
    public DbSet<Categorie> Categories {get;set;}

    public Context() : base("Witze_DB")
    {
    }
}

public class HomeController : Controller
{
    private Context db;

    public HomeController(Context db)
    {
        this.db = db;
    }

    public ActionResult Index()
    {
        var allCats = db.Categories;
        return View(allCats);
    }
}

这是Index.cshtml文件：

@model IEnumerable<Witze.Categorie>

@{
ViewBag.Title = "Index";
}

<h2>Index</h2>

<p>
@Html.ActionLink("Create New", "Create")
</p>
<table>
<tr>
    <th>
        @Html.DisplayNameFor(model => model.Name)
    </th>
    <th></th>
</tr>

@foreach (var item in Model) {
<tr>
    <td>
        @Html.DisplayFor(modelItem => item.Name)
    </td>
    <td>
        @Html.ActionLink("Edit", "Edit", new { id=item.CategorieId }) |
        @Html.ActionLink("Details", "Details", new { id=item.CategorieId }) |
        @Html.ActionLink("Delete", "Delete", new { id=item.CategorieId })
    </td>
</tr>
}

</table>

这就是我所得到的:(它会更长，如果它确实对你有所帮助，我会发布其余的，它只是更多System.Data.SqlClient ...）

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


 The system cannot find the file specified 
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Exception Details: System.ComponentModel.Win32Exception: The system cannot find the file specified

Source Error: 





    Line 18:     </tr>
    Line 19: 
    Line 20: @foreach (var item in Model) {
    Line 21:     <tr>
    Line 22:         <td> 

Source File: c:\Users\a80815067.EISLAB\Documents\Visual Studio 2012\Projects\Witze_Logik\Witze_Web\Views\Home\Index.cshtml    Line: 20 

Stack Trace: 





[Win32Exception (0x80004005): The system cannot find the file specified]

[SqlException (0x80131904): A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 52 - Unable to locate a Local Database Runtime installation. Verify that SQL Server Express is properly installed and that the Local Database Runtime feature is enabled.)]
   System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction) +5295887
   System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose) +242

如果您需要任何其他信息，请询问。

Answer 1

看看堆栈跟踪，您有以下错误：

找不到服务器或无法访问服务器。验证实例名称正确，并且SQL Server配置为允许远程连接。（提供者：SQL网络接口，错误：52 - 无法找到本地数据库运行时安装。验证 SQL Server Express已正确安装并且是本地数据库运行时功能已启用。

最有可能的是，您的连接字符串无效。

[Win32Exception（0x80004005）：系统找不到指定的文件]

1 个答案: