Question

我的代码是：

cliente.Country = new List<dic_paises>();

dic_paises C = ((from data in db.dic_paises where data.id == 61  select data).SingleOrDefault());

cliente.Country.Add(new dic_paises() { id = C.id, nome = C.nome });
return View();

我想要做的是，我有一个表格客户端和一个表格国家/地区，现在我想在视图中显示客户端而不是显示存储在客户端中的国家/地区的ID我要显示国家/地区名称，我很难在mvc中完成它，因为我是mvc的新手。尝试使用视图模型，但没有得到预期的结果。

public partial class cliente
{
    public int id { get; set; }

    [StringLength(1024)]
    public string nome { get; set; }

    [StringLength(1024)]
    public string apelido { get; set; }

    [StringLength(1024)]
    public string email { get; set; }

    public List<dic_paises> Country { get; set; }
}

这是客户端模型，这里是国家/地区型号：

public partial class dic_paises
{
    public int id { get; set; }

    [Required]
    [StringLength(1024)]
    public string nome { get; set; }
}

这就是我在我的控制器中所做的，在youtube上看到了一个视频...

cliente cliente = db.clientes.Find(id);

if (cliente == null)
{
    return HttpNotFound();
}

cliente.Country = new List<dic_paises>();

dic_paises C = ((from data in db.dic_paises where data.id == 61  select data).SingleOrDefault());

cliente.Country.Add(new dic_paises() { id = C.id, nome = C.nome });
return View();

请尽力帮助......

这是错误......

[SqlException（0x80131904）：列名无效＆＃39; cliente_id＆＃39;。]
  System.Data.SqlClient.SqlConnection.OnError（SqlException异常，Boolean breakConnection，Action 1 wrapCloseInAction) +2418094 System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action 1 wrapCloseInAction）+5694468
  System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning（TdsParserStateObject stateObj，Boolean callerHasConnectionLock，Boolean asyncClose）+285
  System.Data.SqlClient.TdsParser.TryRun（RunBehavior runBehavior，SqlCommand cmdHandler，SqlDataReader dataStream，BulkCopySimpleResultSet bulkCopyHandler，TdsParserStateObject stateObj，Boolean＆amp; dataReady）+3731
  System.Data.SqlClient.SqlDataReader.TryConsumeMetaData（）+58
  System.Data.SqlClient.SqlDataReader.get_MetaData（）+89
  System.Data.SqlClient.SqlCommand.FinishExecuteReader（SqlDataReader ds，RunBehavior runBehavior，String resetOptionsString）+379
  System.Data.SqlClient.SqlCommand.RunExecuteReaderTds（CommandBehavior cmdBehavior，RunBehavior runBehavior，Boolean returnStream，Boolean async，Int32 timeout，Task＆amp; task，Boolean asyncWrite，SqlDataReader ds，Boolean describeParameterEncryptionRequest）+2064
  System.Data.SqlClient.SqlCommand.RunExecuteReader（CommandBehavior cmdBehavior，RunBehavior runBehavior，Boolean returnStream，String method，TaskCompletionSource 1 completion, Int32 timeout, Task& task, Boolean asyncWrite) +375 System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method) +53 System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method) +240 System.Data.SqlClient.SqlCommand.ExecuteDbDataReader(CommandBehavior behavior) +41 System.Data.Common.DbCommand.ExecuteReader(CommandBehavior behavior) +12 System.Data.Entity.Infrastructure.Interception.DbCommandDispatcher.<Reader>b__c(DbCommand t, DbCommandInterceptionContext 1 c）+14
  System.Data.Entity.Infrastructure.Interception.InternalDispatcher 1.Dispatch(TTarget target, Func 3操作，TInterceptionContext interceptionContext，Action 3 executing, Action 3执行）+72
  System.Data.Entity.Infrastructure.Interception.DbCommandDispatcher.Reader（DbCommand命令，DbCommandInterceptionContext interceptionContext）+402
        System.Data.Entity.Internal.InterceptableDbCommand.ExecuteDbDataReader（CommandBehavior behavior）+166
  System.Data.Common.DbCommand.ExecuteReader（CommandBehavior behavior）+12
  System.Data.Entity.Core.EntityClient.Internal.EntityCommandDefinition.ExecuteStoreCommands（EntityCommand entityCommand，CommandBehavior behavior）+36

[EntityCommandExecutionException：执行命令定义时发生错误。有关详细信息，请参阅内部异常。]

System.Data.Entity.Core.EntityClient.Internal.EntityCommandDefinition.ExecuteStoreCommands（EntityCommand entityCommand，CommandBehavior behavior）+103
  System.Data.Entity.Core.Objects.Internal.ObjectQueryExecutionPlan.Execute（ObjectContext context，ObjectParameterCollection parameterValues）+758
  System.Data.Entity.Core.Objects。＆lt;＆gt; c__DisplayClass7.b__6（）+90
  System.Data.Entity.Core.Objects.ObjectContext.ExecuteInTransaction（Func 1 func, IDbExecutionStrategy executionStrategy, Boolean startLocalTransaction, Boolean releaseConnectionOnSuccess) +288 System.Data.Entity.Core.Objects.<>c__DisplayClass7.<GetResults>b__5() +154 System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute(Func 1次操作）+190
  System.Data.Entity.Core.Objects.ObjectQuery 1.GetResults(Nullable 1 forMergeOption）+283          System.Data.Entity.Core.Objects.ObjectQuery 1.<System.Collections.Generic.IEnumerable<T>.GetEnumerator>b__0() +15 System.Data.Entity.Internal.LazyEnumerator 1.MoveNext（）+45          System.Linq.Enumerable.SingleOrDefault（IEnumerable 1 source) +121 System.Data.Entity.Core.Objects.ELinq.ObjectQueryProvider.<GetElementFunction>b__2(IEnumerable 1序列）+40          System.Data.Entity.Core.Objects.ELinq.ObjectQueryProvider.ExecuteSingle（IEnumerable 1 query, Expression queryRoot) +59 System.Data.Entity.Core.Objects.ELinq.ObjectQueryProvider.System.Linq.IQueryProvider.Execute(Expression expression) +114 System.Data.Entity.Internal.Linq.DbQueryProvider.Execute(Expression expression) +116 System.Linq.Queryable.SingleOrDefault(IQueryable 1 source）+211          WebApplication2.Controllers.clientesController.Details（Nullable 1 id) in C:\Users\dani1\Documents\Visual Studio 2015\Projects\WebApplication2\WebApplication2\Controllers\clientesController.cs:56 lambda_method(Closure , ControllerBase , Object[] ) +107 System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters) +14 System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary 2个参数）+157          System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod（ControllerContext controllerContext，ActionDescriptor actionDescriptor，IDictionary 2 parameters) +27 System.Web.Mvc.Async.AsyncControllerActionInvoker.<BeginInvokeSynchronousActionMethod>b__39(IAsyncResult asyncResult, ActionInvocation innerInvokeState) +22 System.Web.Mvc.Async.WrappedAsyncResult 2.CallEndDelegate（IAsyncResult asyncResult）+29          System.Web.Mvc.Async.WrappedAsyncResultBase 1.End() +49 System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod(IAsyncResult asyncResult) +32 System.Web.Mvc.Async.AsyncInvocationWithFilters.<InvokeActionMethodFilterAsynchronouslyRecursive>b__3d() +50 System.Web.Mvc.Async.<>c__DisplayClass46.<InvokeActionMethodFilterAsynchronouslyRecursive>b__3f() +225 System.Web.Mvc.Async.<>c__DisplayClass33.<BeginInvokeActionMethodWithFilters>b__32(IAsyncResult asyncResult) +10 System.Web.Mvc.Async.WrappedAsyncResult 1.CallEndDelegate（IAsyncResult asyncResult）+10          System.Web.Mvc.Async.WrappedAsyncResultBase 1.End() +49 System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethodWithFilters(IAsyncResult asyncResult) +34 System.Web.Mvc.Async.<>c__DisplayClass2b.<BeginInvokeAction>b__1c() +26 System.Web.Mvc.Async.<>c__DisplayClass21.<BeginInvokeAction>b__1e(IAsyncResult asyncResult) +100 System.Web.Mvc.Async.WrappedAsyncResult 1.CallEndDelegate（IAsyncResult asyncResult）+10          System.Web.Mvc.Async.WrappedAsyncResultBase 1.End() +49 System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +27 System.Web.Mvc.Controller.<BeginExecuteCore>b__1d(IAsyncResult asyncResult, ExecuteCoreState innerState) +13 System.Web.Mvc.Async.WrappedAsyncVoid 1.CallEndDelegate（IAsyncResult asyncResult）+29          System.Web.Mvc.Async.WrappedAsyncResultBase 1.End() +49 System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +36 System.Web.Mvc.Controller.<BeginExecute>b__15(IAsyncResult asyncResult, Controller controller) +12 System.Web.Mvc.Async.WrappedAsyncVoid 1.CallEndDelegate（IAsyncResult asyncResult）+22          System.Web.Mvc.Async.WrappedAsyncResultBase 1.End() +49 System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +26 System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.EndExecute(IAsyncResult asyncResult) +10 System.Web.Mvc.MvcHandler.<BeginProcessRequest>b__5(IAsyncResult asyncResult, ProcessRequestState innerState) +21 System.Web.Mvc.Async.WrappedAsyncVoid 1.CallEndDelegate（IAsyncResult asyncResult）+29          System.Web.Mvc.Async.WrappedAsyncResultBase`1.End（）+49          System.Web.Mvc.MvcHandler.EndProcessRequest（IAsyncResult asyncResult）+28          System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest（IAsyncResult result）+9          System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute（）+9723757          System.Web.HttpApplication.ExecuteStep（IExecutionStep step，Boolean＆amp; completedSynchronously）+155

Answer 1

情况就这样解决了......

我猜这就是他们所说的视图模型

public class ClienteCountry
    {
        public cliente cli { get; set; }

        public dic_paises country { get; set; }
    }

控制器代码......

cliente ccc = (from data in db.clientes where data.id == id select data).FirstOrDefault();
                dic_paises ppp = (from data in db.dic_paises where data.id == ccc.pais select data).FirstOrDefault();
                ClienteCountry cc = new ClienteCountry();
                cc.cli = ccc;
                cc.country = ppp;
                ViewBag.id = id;
                return View(cc);

其中id是通过视图传递的参数...

在视图中我把它......

@model  WebApplication2.Models.ClienteCountry

然后我能够使用我的属性......

@Html.DisplayNameFor(model => model.cli.nome)
@Html.DisplayFor(model => model.cli.nome)

@Html.DisplayNameFor(model => model.cli.apelido)
@Html.DisplayFor(model => model.cli.apelido)

@Html.DisplayName("Country")
@Html.DisplayFor(model => model.country.nome)

无论如何，感谢你们所有人，......

我没有要求

1 个答案: