我目前正在使用自己的简单CMS使用MVC来熟悉MVC和EF。
此时我只有包含多个段落的页面。在数据库中，我有1页（主页）和1段。
在home的索引视图中，我调用控制器的GetParagraph动作来根据占位符值获取段落。占位符值正在正确发送到控制器和查询。但是当查询尝试访问数据库以检索记录时，我收到异常。
异常
{"Invalid column name 'ParagraphId'.\r\nInvalid column name 'PageId'.\r\nInvalid column name 'LinkUrl'.\r\nInvalid column name 'LinkText'.\r\nInvalid column name 'LinkTarget'.\r\nInvalid column name 'ImageUrl'.\r\nInvalid column name 'ImageLink'.\r\nInvalid column name 'ImageLinkTarget'.\r\nInvalid column name 'ImageAlt'."}
模型
public class Page
{
[Key]
public int PageId { get; set; }
[DisplayName("Parent")]
public int? ParentId { get; set; }
[Required]
public string Title { get; set; }
[Required]
[DisplayName("View name")]
public string ViewName { get; set; }
[DataType(DataType.Date)]
public DateTime Created = DateTime.Now;
[Required]
public bool Published { get; set; }
public virtual ICollection<Paragraph> Paragraphs { get; set; }
}
public class Paragraph
{
[Key]
public int ParagraphId { get; set; }
public int PageId { get; set; }
public virtual Page Page { get; set; }
public string Placeholder { get; set; }
public string Title { get; set; }
[AllowHtml]
[DataType(DataType.MultilineText)]
public string Text { get; set; }
public string LinkUrl { get; set; }
public string LinkText { get; set; }
public string LinkTarget { get; set; }
public string ImageUrl { get; set; }
public string ImageLink { get; set; }
public string ImageLinkTarget { get; set; }
public string ImageAlt { get; set; }
[DataType(DataType.Date)]
public DateTime Created = DateTime.Now;
[Required]
public bool Published { get; set; }
}
控制器
public class PzzlController : Controller
{
PzzlDB _db = new PzzlDB();
public ActionResult GetParagraph(string placeholder)
{
var viewModel = _db.Paragraphs.GetParagraphByPlaceholder(placeholder);
if (viewModel != null)
{
return PartialView("~/Views/Shared/Pzzl/_Paragraph.cshtml", viewModel);
}
else
{
return null;
}
}
}
查询
public static Paragraph GetParagraphByPlaceholder(
this IQueryable<Paragraph> Paragraph, string placeholder)
{
try
{
return Paragraph.Single(p => p.Placeholder == placeholder);
}
catch (Exception)
{
return null;
}
}
段落变量的内容
Local = 'System.Linq.IQueryable<Pzzl.Models.Pzzl.Paragraph>' does not contain a definition for 'Local' and no extension method 'Local' accepting a first argument of type 'System.Linq.IQueryable<Pzzl.Models.Pzzl.Paragraph>' could be found (are you missing a using di...
堆栈跟踪
[SqlException (0x80131904): Invalid column name 'ParagraphId'.
Invalid column name 'PageId'.
Invalid column name 'LinkUrl'.
Invalid column name 'LinkText'.
Invalid column name 'LinkTarget'.
Invalid column name 'ImageUrl'.
Invalid column name 'ImageLink'.
Invalid column name 'ImageLinkTarget'.
Invalid column name 'ImageAlt'.]
System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction) +1753986
System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction) +5296058
System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose) +558
System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady) +1682
System.Data.SqlClient.SqlDataReader.TryConsumeMetaData() +59
System.Data.SqlClient.SqlDataReader.get_MetaData() +90
System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString) +365
System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async, Int32 timeout, Task& task, Boolean asyncWrite) +1379
System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, TaskCompletionSource`1 completion, Int32 timeout, Task& task, Boolean asyncWrite) +175
System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method) +53
System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method) +134
System.Data.SqlClient.SqlCommand.ExecuteDbDataReader(CommandBehavior behavior) +41
System.Data.Common.DbCommand.ExecuteReader(CommandBehavior behavior) +10
System.Data.Entity.Infrastructure.Interception.<>c__DisplayClassb.<Reader>b__8() +69
System.Data.Entity.Infrastructure.Interception.InternalDispatcher`1.Dispatch(Func`1 operation, TInterceptionContext interceptionContext, Action`1 executing, Action`1 executed) +93
System.Data.Entity.Infrastructure.Interception.DbCommandDispatcher.Reader(DbCommand command, DbCommandInterceptionContext interceptionContext) +320
System.Data.Entity.Internal.InterceptableDbCommand.ExecuteDbDataReader(CommandBehavior behavior) +240
System.Data.Common.DbCommand.ExecuteReader(CommandBehavior behavior) +10
System.Data.Entity.Core.EntityClient.Internal.EntityCommandDefinition.ExecuteStoreCommands(EntityCommand entityCommand, CommandBehavior behavior) +104
[EntityCommandExecutionException: An error occurred while executing the command definition. See the inner exception for details.]
System.Data.Entity.Core.EntityClient.Internal.EntityCommandDefinition.ExecuteStoreCommands(EntityCommand entityCommand, CommandBehavior behavior) +188
System.Data.Entity.Core.Objects.Internal.ObjectQueryExecutionPlan.Execute(ObjectContext context, ObjectParameterCollection parameterValues) +1283
System.Data.Entity.Core.Objects.<>c__DisplayClass3.<GetResults>b__2() +185
System.Data.Entity.Core.Objects.ObjectContext.ExecuteInTransaction(Func`1 func, IDbExecutionStrategy executionStrategy, Boolean startLocalTransaction, Boolean releaseConnectionOnSuccess) +499
System.Data.Entity.Core.Objects.<>c__DisplayClass3.<GetResults>b__1() +271
System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute(Func`1 operation) +251
System.Data.Entity.Core.Objects.ObjectQuery`1.GetResults(Nullable`1 forMergeOption) +600
System.Data.Entity.Core.Objects.ObjectQuery`1.<System.Collections.Generic.IEnumerable<T>.GetEnumerator>b__0() +89
System.Lazy`1.CreateValue() +416
System.Lazy`1.LazyInitValue() +152
System.Lazy`1.get_Value() +75
System.Data.Entity.Internal.LazyEnumerator`1.MoveNext() +40
System.Linq.Enumerable.SingleOrDefault(IEnumerable`1 source) +4078797
System.Data.Entity.Core.Objects.ELinq.ObjectQueryProvider.<GetElementFunction>b__2(IEnumerable`1 sequence) +83
System.Data.Entity.Core.Objects.ELinq.ObjectQueryProvider.ExecuteSingle(IEnumerable`1 query, Expression queryRoot) +107
System.Data.Entity.Core.Objects.ELinq.ObjectQueryProvider.System.Linq.IQueryProvider.Execute(Expression expression) +197
System.Data.Entity.Internal.Linq.DbQueryProvider.Execute(Expression expression) +149
System.Linq.Queryable.SingleOrDefault(IQueryable`1 source, Expression`1 predicate) +287
Pzzl.Queries.Pzzl.ParagraphQueries.GetParagraphByPlaceholder(IQueryable`1 Paragraph, String placeholder) in C:\Projects\Speeltuin\MVCWebsite\Portfolio\Pzzl\Queries\Pzzl\ParagraphQueries.cs:43
Portfolio.Controllers.PzzlController.GetParagraphTitle(String placeholder) in C:\Projects\Speeltuin\MVCWebsite\Portfolio\Portfolio\Controllers\PzzlController.cs:17
lambda_method(Closure , ControllerBase , Object[] ) +180
System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters) +14
System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) +214
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +27
Castle.Proxies.ControllerActionInvokerProxy.InvokeActionMethod_callback(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +47
Castle.Proxies.Invocations.ControllerActionInvoker_InvokeActionMethod.InvokeMethodOnTarget() +226
Castle.DynamicProxy.AbstractInvocation.Proceed() +117
Glimpse.Core.Extensibility.CastleInvocationToAlternateMethodContextAdapter.Proceed() +48
Glimpse.Core.Extensibility.ExecutionTimer.Time(Action action) +195
Glimpse.Core.Extensions.AlternateMethodContextExtensions.TryProceedWithTimer(IAlternateMethodContext context, TimerResult& timerResult) +198
Glimpse.Core.Extensibility.AlternateMethod.NewImplementation(IAlternateMethodContext context) +45
Glimpse.Core.Extensibility.AlternateTypeToCastleInterceptorAdapter.Intercept(IInvocation invocation) +183
Castle.DynamicProxy.AbstractInvocation.Proceed() +483
Castle.Proxies.ControllerActionInvokerProxy.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +235
System.Web.Mvc.<>c__DisplayClass15.<InvokeActionMethodWithFilters>b__12() +55
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation) +253
System.Web.Mvc.<>c__DisplayClass17.<InvokeActionMethodWithFilters>b__14() +21
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodWithFilters(ControllerContext controllerContext, IList`1 filters, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +191
System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) +324
System.Web.Mvc.Controller.ExecuteCore() +106
System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext) +91
System.Web.Mvc.ControllerBase.System.Web.Mvc.IController.Execute(RequestContext requestContext) +10
System.Web.Mvc.<>c__DisplayClassb.<BeginProcessRequest>b__5() +34
System.Web.Mvc.Async.<>c__DisplayClass1.<MakeVoidDelegate>b__0() +19
System.Web.Mvc.Async.<>c__DisplayClass8`1.<BeginSynchronous>b__7(IAsyncResult _) +10
System.Web.Mvc.Async.WrappedAsyncResult`1.End() +62
System.Web.Mvc.<>c__DisplayClasse.<EndProcessRequest>b__d() +48
System.Web.Mvc.SecurityUtil.<GetCallInAppTrustThunk>b__0(Action f) +7
System.Web.Mvc.SecurityUtil.ProcessInApplicationTrust(Action action) +22
System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +60
System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +9
System.Web.Mvc.<>c__DisplayClassa.<EndProcessRequest>b__9() +22
System.Web.Mvc.<>c__DisplayClass4.<Wrap>b__3() +10
System.Web.Mvc.ServerExecuteHttpHandlerWrapper.Wrap(Func`1 func) +27
System.Web.Mvc.ServerExecuteHttpHandlerWrapper.Wrap(Action action) +65
System.Web.Mvc.ServerExecuteHttpHandlerAsyncWrapper.EndProcessRequest(IAsyncResult result) +71
System.Web.HttpServerUtility.ExecuteInternal(IHttpHandler handler, TextWriter writer, Boolean preserveForm, Boolean setPreviousPage, VirtualPath path, VirtualPath filePath, String physPath, Exception error, String queryStringOverride) +1097
[HttpException (0x80004005): Fout bij uitvoeren van onderliggende aanvraagelement voor handler 'System.Web.Mvc.HttpHandlerUtil+ServerExecuteHttpHandlerAsyncWrapper'.]
System.Web.HttpServerUtility.ExecuteInternal(IHttpHandler handler, TextWriter writer, Boolean preserveForm, Boolean setPreviousPage, VirtualPath path, VirtualPath filePath, String physPath, Exception error, String queryStringOverride) +3122411
System.Web.HttpServerUtility.Execute(IHttpHandler handler, TextWriter writer, Boolean preserveForm, Boolean setPreviousPage) +76
System.Web.HttpServerUtility.Execute(IHttpHandler handler, TextWriter writer, Boolean preserveForm) +28
System.Web.HttpServerUtilityWrapper.Execute(IHttpHandler handler, TextWriter writer, Boolean preserveForm) +19
System.Web.Mvc.Html.ChildActionExtensions.ActionHelper(HtmlHelper htmlHelper, String actionName, String controllerName, RouteValueDictionary routeValues, TextWriter textWriter) +483
System.Web.Mvc.Html.ChildActionExtensions.RenderAction(HtmlHelper htmlHelper, String actionName, String controllerName, Object routeValues) +58
ASP._Page_Views_Home_Index_cshtml.Execute() in c:\Projects\Speeltuin\MVCWebsite\Portfolio\Portfolio\Views\Home\Index.cshtml:10
System.Web.WebPages.WebPageBase.ExecutePageHierarchy() +197
System.Web.Mvc.WebViewPage.ExecutePageHierarchy() +81
System.Web.WebPages.StartPage.RunPage() +17
System.Web.WebPages.StartPage.ExecutePageHierarchy() +62
System.Web.WebPages.WebPageBase.ExecutePageHierarchy(WebPageContext pageContext, TextWriter writer, WebPageRenderingBase startPage) +76
System.Web.Mvc.RazorView.RenderView(ViewContext viewContext, TextWriter writer, Object instance) +222
System.Web.Mvc.BuildManagerCompiledView.Render(ViewContext viewContext, TextWriter writer) +115
Castle.Proxies.Invocations.IView_Render.InvokeMethodOnTarget() +188
Castle.DynamicProxy.AbstractInvocation.Proceed() +117
Glimpse.Core.Extensibility.CastleInvocationToAlternateMethodContextAdapter.Proceed() +48
Glimpse.Core.Extensibility.ExecutionTimer.Time(Action action) +195
Glimpse.Core.Extensions.AlternateMethodContextExtensions.TryProceedWithTimer(IAlternateMethodContext context, TimerResult& timerResult) +198
Glimpse.Core.Extensibility.AlternateMethod.NewImplementation(IAlternateMethodContext context) +45
Glimpse.Core.Extensibility.AlternateTypeToCastleInterceptorAdapter.Intercept(IInvocation invocation) +183
Castle.DynamicProxy.AbstractInvocation.Proceed() +483
Castle.Proxies.IViewProxy.Render(ViewContext viewContext, TextWriter writer) +202
System.Web.Mvc.ViewResultBase.ExecuteResult(ControllerContext context) +295
System.Web.Mvc.ControllerActionInvoker.InvokeActionResult(ControllerContext controllerContext, ActionResult actionResult) +13
Castle.Proxies.ControllerActionInvokerProxy.InvokeActionResult_callback(ControllerContext controllerContext, ActionResult actionResult) +39
Castle.Proxies.Invocations.ControllerActionInvoker_InvokeActionResult.InvokeMethodOnTarget() +182
Castle.DynamicProxy.AbstractInvocation.Proceed() +117
Glimpse.Core.Extensibility.CastleInvocationToAlternateMethodContextAdapter.Proceed() +48
Glimpse.Core.Extensibility.ExecutionTimer.Time(Action action) +195
Glimpse.Core.Extensions.AlternateMethodContextExtensions.TryProceedWithTimer(IAlternateMethodContext context, TimerResult& timerResult) +198
Glimpse.Core.Extensibility.AlternateMethod.NewImplementation(IAlternateMethodContext context) +45
Glimpse.Core.Extensibility.AlternateTypeToCastleInterceptorAdapter.Intercept(IInvocation invocation) +183
Castle.DynamicProxy.AbstractInvocation.Proceed() +483
Castle.Proxies.ControllerActionInvokerProxy.InvokeActionResult(ControllerContext controllerContext, ActionResult actionResult) +219
System.Web.Mvc.<>c__DisplayClass1c.<InvokeActionResultWithFilters>b__19() +23
System.Web.Mvc.ControllerActionInvoker.InvokeActionResultFilter(IResultFilter filter, ResultExecutingContext preContext, Func`1 continuation) +242
System.Web.Mvc.<>c__DisplayClass1e.<InvokeActionResultWithFilters>b__1b() +21
System.Web.Mvc.ControllerActionInvoker.InvokeActionResultWithFilters(ControllerContext controllerContext, IList`1 filters, ActionResult actionResult) +177
System.Web.Mvc.ControllerActionInvoker.InvokeAction(ControllerContext controllerContext, String actionName) +324
System.Web.Mvc.Controller.ExecuteCore() +106
System.Web.Mvc.ControllerBase.Execute(RequestContext requestContext) +91
System.Web.Mvc.ControllerBase.System.Web.Mvc.IController.Execute(RequestContext requestContext) +10
System.Web.Mvc.<>c__DisplayClassb.<BeginProcessRequest>b__5() +34
System.Web.Mvc.Async.<>c__DisplayClass1.<MakeVoidDelegate>b__0() +19
System.Web.Mvc.Async.<>c__DisplayClass8`1.<BeginSynchronous>b__7(IAsyncResult _) +10
System.Web.Mvc.Async.WrappedAsyncResult`1.End() +62
System.Web.Mvc.<>c__DisplayClasse.<EndProcessRequest>b__d() +48
System.Web.Mvc.SecurityUtil.<GetCallInAppTrustThunk>b__0(Action f) +7
System.Web.Mvc.SecurityUtil.ProcessInApplicationTrust(Action action) +22
System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +60
System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +9
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +9628972
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +155
答案 0 :(得分：1)
您是否检查了诸如您的连接字符串之类的明显事物？如果你有多个连接字符串，那么可能值得检查它不是指本地MSSQL-express数据库而不是另一个（也许是在线）数据库。
看起来您使用EF代码的第一原则。因此，它可能与您的数据库不是最新的，或至少您的模型认为不是。您可以为此使用迁移，有关详细信息，请参阅此link。
虽然在最后一种情况下我当然会期待一个不同的错误信息。
希望这会有所帮助..
答案 1 :(得分：0)
我仍然没有弄清楚导致我出现问题的原因，所以我已经开始使用get get中的迁移了。到目前为止，我还没有遇到过这个问题。