Question

I am constructing my connectionstring the following way
( with appropriate values)

        var builder = new SqlConnectionStringBuilder
        {
            PersistSecurityInfo = false,
            InitialCatalog = "mydatabase",
            UserID = "myuser",
            Password = "mydatabase",
            DataSource = "myserver"
        };
        var connectionString = builder.ConnectionString;
        using (var db = Helper.MakeContext(connectionString)) {
            var carrier = db.Carriers.FirstOrDefault(); // fails here with error
            Console.WriteLine(carrier.Carrier);
        }

Helper在另一个项目中

using System;
using System.Collections.Generic;
using System.Data;
using System.Data.Common;
using System.Data.SqlClient;
using ApiForVivtrack3.Entities;


public static class Helper
{
    //public  string ConnectionString { get; set; }
    public static ApiDbContext MakeContext(string connectionString)
    {
        var db = new ApiDbContext(connectionString);
        return db;
    }

}

EF 6.2 DbContext设置为

using System.Data.Entity.ModelConfiguration.Conventions;
using System.Data.Entity;
namespace ApiForVivtrack3.Entities
{
    public partial class ApiDbContext : DbContext
    {
        public ApiDbContext(string efConnectString)
        : base(efConnectString)
        {

        }

     // DbSet declarations

The call stack is 


Test method UnitTestProject1.UnitTest1.TestMethod1 threw exception: 
System.InvalidOperationException: The store type 'decimal(18,4)' could not be found in the SqlServer provider manifest
    at System.Data.Entity.Utilities.DbProviderManifestExtensions.GetStoreTypeFromName(DbProviderManifest providerManifest, String name)
   at System.Data.Entity.ModelConfiguration.Configuration.Properties.Primitive.PrimitivePropertyConfiguration.ConfigureColumn(EdmProperty column, EntityType table, DbProviderManifest providerManifest)
   at System.Data.Entity.ModelConfiguration.Configuration.Properties.Primitive.PrimitivePropertyConfiguration.Configure(EdmProperty column, EntityType table, DbProviderManifest providerManifest, Boolean allowOverride, Boolean fillFromExistingConfiguration)
   at System.Data.Entity.ModelConfiguration.Configuration.Properties.Primitive.PrimitivePropertyConfiguration.<>c__DisplayClass4.<Configure>b__3(Tuple`2 pm)
   at System.Data.Entity.Utilities.IEnumerableExtensions.Each[T](IEnumerable`1 ts, Action`1 action)
   at System.Data.Entity.ModelConfiguration.Configuration.Properties.Primitive.PrimitivePropertyConfiguration.Configure(IEnumerable`1 propertyMappings, DbProviderManifest providerManifest, Boolean allowOverride, Boolean fillFromExistingConfiguration)
   at System.Data.Entity.ModelConfiguration.Configuration.Types.StructuralTypeConfiguration.ConfigurePropertyMappings(IList`1 propertyMappings, DbProviderManifest providerManifest, Boolean allowOverride)
   at System.Data.Entity.ModelConfiguration.Configuration.Types.EntityTypeConfiguration.ConfigurePropertyMappings(DbDatabaseMapping databaseMapping, EntityType entityType, DbProviderManifest providerManifest, Boolean allowOverride)
   at System.Data.Entity.ModelConfiguration.Configuration.Types.EntityTypeConfiguration.Configure(EntityType entityType, DbDatabaseMapping databaseMapping, DbProviderManifest providerManifest)
   at System.Data.Entity.ModelConfiguration.Configuration.ModelConfiguration.ConfigureEntityTypes(DbDatabaseMapping databaseMapping, ICollection`1 entitySets, DbProviderManifest providerManifest)
   at System.Data.Entity.ModelConfiguration.Configuration.ModelConfiguration.Configure(DbDatabaseMapping databaseMapping, DbProviderManifest providerManifest)
   at System.Data.Entity.DbModelBuilder.Build(DbProviderManifest providerManifest, DbProviderInfo providerInfo)
   at System.Data.Entity.DbModelBuilder.Build(DbConnection providerConnection)
   at System.Data.Entity.Internal.LazyInternalContext.CreateModel(LazyInternalContext internalContext)
   at System.Data.Entity.Internal.RetryLazy`2.GetValue(TInput input)
   at System.Data.Entity.Internal.LazyInternalContext.InitializeContext()
   at System.Data.Entity.Internal.InternalContext.Initialize()
   at System.Data.Entity.Internal.InternalContext.GetEntitySetAndBaseTypeForType(Type entityType)
   at System.Data.Entity.Internal.Linq.InternalSet`1.Initialize()
   at System.Data.Entity.Internal.Linq.InternalSet`1.get_InternalContext()
   at System.Data.Entity.Infrastructure.DbQuery`1.System.Linq.IQueryable.get_Provider()
   at System.Linq.Queryable.FirstOrDefault[TSource](IQueryable`1 source)
   at UnitTestProject1.UnitTest1.TestMethod1() in D:\devnet10\SBD.Common\UnitTestProject2\UnitTest1.cs:line 39

我已经对Decimal（18）进行了文本搜索，但是没有出现

Answer 1

我知道这是OQ。看到没有答案，我将分享我的工作。

对（18，4）进行查找（ctrl F）或错误消息中的值是多少。您很可能会在解决方案的Fluent API部分中找到文本字符串。就我而言，我将Fluent API代码从CORE应用程序复制到了EF 6应用程序中。内核使用的“ HasColumnType（）”与使用“ HasPrecision（）”的EF 6不兼容。

将“ HasColumnType（”替换为“ HasPrecision（”），然后再次运行代码...

System.InvalidOperationException：在SqlServer提供程序清单中找不到存储类型'decimal（18,4）'

1 个答案: