错误从实体框架代码优先到数据库优先

时间：2016-08-22 16:42:11

标签： c# .net sql-server entity-framework api

我有一本教程书，首先使用代码构建MVC API应用程序。我想先使用DB。当我对api运行调用时，它在内部异常中告诉我它找不到“dbo”。我怀疑.dbo是问题，如果它被删除（或者如果我在某处预先设置）它会工作，但我看不到在哪里改变代码来做到这一点。

以下是我得到的整个错误，上面提到的内容在$ id中引用：“3”

  

$ id：“1”，消息：“发生错误。”，ExceptionMessage：“The   “ObjectContent 1' type failed to serialize the response body for content type 'application/json; charset=utf-8'.", ExceptionType: "System.InvalidOperationException", StackTrace: null, InnerException: { $id: "2", Message: "An error has occurred.", ExceptionMessage: "An error occurred while executing the command definition. See the inner exception for details.", ExceptionType: "System.Data.Entity.Core.EntityCommandExecutionException", StackTrace: " at System.Data.Entity.Core.EntityClient.Internal.EntityCommandDefinition.ExecuteStoreCommands(EntityCommand entityCommand, CommandBehavior behavior) at System.Data.Entity.Core.Objects.Internal.ObjectQueryExecutionPlan.Execute[TResultType](ObjectContext context, ObjectParameterCollection parameterValues) at System.Data.Entity.Core.Objects.ObjectQuery 1＆LT;＆GT; c__DisplayClass7.b__6（）   在   System.Data.Entity.Core.Objects.ObjectContext.ExecuteInTransaction [T]（Func键1 func, IDbExecutionStrategy executionStrategy, Boolean startLocalTransaction, Boolean releaseConnectionOnSuccess) at System.Data.Entity.Core.Objects.ObjectQuery 1＆LT;＆GT; c__DisplayClass7.b__5（）   在   System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute [TResult]（Func键1 operation) at System.Data.Entity.Core.Objects.ObjectQuery 1.GetResults（可空1 forMergeOption) at System.Data.Entity.Core.Objects.ObjectQuery 1..GetEnumerator＆GT; b__0（）   在System.Data.Entity.Internal.LazyEnumerator 1.MoveNext() at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeList(JsonWriter writer, IEnumerable values, JsonArrayContract contract, JsonProperty member, JsonContainerContract collectionContract, JsonProperty containerProperty) at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.SerializeValue(JsonWriter writer, Object value, JsonContract valueContract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerProperty) at Newtonsoft.Json.Serialization.JsonSerializerInternalWriter.Serialize(JsonWriter jsonWriter, Object value, Type objectType) at Newtonsoft.Json.JsonSerializer.SerializeInternal(JsonWriter jsonWriter, Object value, Type objectType) at System.Net.Http.Formatting.BaseJsonMediaTypeFormatter.WriteToStream(Type type, Object value, Stream writeStream, Encoding effectiveEncoding) at System.Net.Http.Formatting.JsonMediaTypeFormatter.WriteToStream(Type type, Object value, Stream writeStream, Encoding effectiveEncoding) at System.Net.Http.Formatting.BaseJsonMediaTypeFormatter.WriteToStream(Type type, Object value, Stream writeStream, HttpContent content) at System.Net.Http.Formatting.BaseJsonMediaTypeFormatter.WriteToStreamAsync(Type type, Object value, Stream writeStream, HttpContent content, TransportContext transportContext, CancellationToken cancellationToken) --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Web.Http.WebHost.HttpControllerHandler.<WriteBufferedResponseContentAsync>d__1b.MoveNext()", InnerException: { $id: "3", Message: "An error has occurred.", **ExceptionMessage: "Invalid object name 'dbo.ContactType'."**, ExceptionType: "System.Data.SqlClient.SqlException", StackTrace: " at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action 1 wrapCloseInAction）at   System.Data.SqlClient.SqlInternalConnection.OnError（SQLEXCEPTION   exception，Boolean breakConnection，Action 1 wrapCloseInAction) at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose) at System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady) at System.Data.SqlClient.SqlDataReader.TryConsumeMetaData() at System.Data.SqlClient.SqlDataReader.get_MetaData() at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString, Boolean isInternal, Boolean forDescribeParameterEncryption) at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async, Int32 timeout, Task& task, Boolean asyncWrite, Boolean inRetry, SqlDataReader ds, Boolean describeParameterEncryptionRequest) at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, TaskCompletionSource 1 completion，Int32 timeout，Task＆amp;任务，   布尔和放大器; usedCache，Boolean asyncWrite，Boolean inRetry）at   System.Data.SqlClient.SqlCommand.RunExecuteReader（的CommandBehavior   cmdBehavior，RunBehavior runBehavior，Boolean returnStream，String   方法）at   System.Data.SqlClient.SqlCommand.ExecuteReader（的CommandBehavior   行为，String方法）at   System.Data.SqlClient.SqlCommand.ExecuteDbDataReader（的CommandBehavior   行为）   System.Data.Common.DbCommand.ExecuteReader（CommandBehavior behavior）   在   System.Data.Entity.Infrastructure.Interception.DbCommandDispatcher.b__c（的DbCommand   t，DbCommandInterceptionContext 1 c) at System.Data.Entity.Infrastructure.Interception.InternalDispatcher 1.Dispatch [TTarget，TInterceptionContext，TResult]（TTarget   target，Func 3 operation, TInterceptionContext interceptionContext, Action 3执行，Action`3执行）at   System.Data.Entity.Infrastructure.Interception.DbCommandDispatcher.Reader（的DbCommand   命令，DbCommandInterceptionContext interceptionContext）at   System.Data.Entity.Internal.InterceptableDbCommand.ExecuteDbDataReader（的CommandBehavior   行为）   System.Data.Common.DbCommand.ExecuteReader（CommandBehavior behavior）   在   System.Data.Entity.Core.EntityClient.Internal.EntityCommandDefinition.ExecuteStoreCommands（EntityCommand   entityCommand，CommandBehavior behavior）“

DBContext.edmx 

<EntityType Name="ContactType">
  <Key>
    <PropertyRef Name="ID" />
  </Key>
  <Property Name="ID" Type="int" StoreGeneratedPattern="Identity" Nullable="false" />
  <Property Name="Description" Type="varchar" MaxLength="50" Nullable="false" />
</EntityType>

DBContext.Context.cs 

public virtual DbSet<ContactType> ContactType { get; set; }

public virtual int addContact(Nullable<int> contactTypeID, string emailAddress, string lastName, string firstName, string companyName, string phoneNumber1, string phoneNumber2, string comment)
{
    var contactTypeIDParameter = contactTypeID.HasValue ?
        new ObjectParameter("ContactTypeID", contactTypeID) :
        new ObjectParameter("ContactTypeID", typeof(int));

    var emailAddressParameter = emailAddress != null ?
        new ObjectParameter("EmailAddress", emailAddress) :
        new ObjectParameter("EmailAddress", typeof(string));

    var lastNameParameter = lastName != null ?
        new ObjectParameter("LastName", lastName) :
        new ObjectParameter("LastName", typeof(string));

    var firstNameParameter = firstName != null ?
        new ObjectParameter("FirstName", firstName) :
        new ObjectParameter("FirstName", typeof(string));

    var companyNameParameter = companyName != null ?
        new ObjectParameter("CompanyName", companyName) :
        new ObjectParameter("CompanyName", typeof(string));

    var phoneNumber1Parameter = phoneNumber1 != null ?
        new ObjectParameter("PhoneNumber1", phoneNumber1) :
        new ObjectParameter("PhoneNumber1", typeof(string));

    var phoneNumber2Parameter = phoneNumber2 != null ?
        new ObjectParameter("PhoneNumber2", phoneNumber2) :
        new ObjectParameter("PhoneNumber2", typeof(string));

    var commentParameter = comment != null ?
        new ObjectParameter("Comment", comment) :
        new ObjectParameter("Comment", typeof(string));

    return ((IObjectContextAdapter)this).ObjectContext.ExecuteFunction("addContact", contactTypeIDParameter, emailAddressParameter, lastNameParameter, firstNameParameter, companyNameParameter, phoneNumber1Parameter, phoneNumber2Parameter, commentParameter);
}

ContactType.cs 

namespace AHT.Data
{
    using System;
    using System.Collections.Generic;

    public partial class ContactType
    {
        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2214:DoNotCallOverridableMethodsInConstructors")]
        public ContactType()
        {
            this.Contact = new HashSet<Contact>();
        }

        public int ID { get; set; }
        public string Description { get; set; }

        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")]
        public virtual ICollection<Contact> Contact { get; set; }
    }
}

1 个答案:

答案 0 :(得分：0)

请忽略，这是一个愚蠢的配置字符串错误。

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