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Getting Entity Model dynamically based on TableName?


Getting Entity Model dynamically based on TableName?

By : Leox Rz
Date : November 29 2020, 04:01 AM
it helps some times You can either use Activator.CreateInstance or DbSet.Create() to create entity. Then use DbSet.Add() to add it to dbset.
See sample below
code :
object entityObj = dbSet.Create();

//Populate values using reflection / dynamic
//....

dbSet.Add(entityObj);
dbSet.SaveChanges();


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how to get child table along with the parent in entity framework using entity sql like "select value tablename from

how to get child table along with the parent in entity framework using entity sql like "select value tablename from


By : Brett Daniels
Date : March 29 2020, 07:55 AM
Hope that helps You call Include() on your ObjectQuery, just like you do with LINQ to Entities. It's no different if you create your query using ESQL.
Entity Framework: How to Treat dbo.tablename diffrent from obd.tablename

Entity Framework: How to Treat dbo.tablename diffrent from obd.tablename


By : Kefeng Chen
Date : March 29 2020, 07:55 AM
it should still fix some issue Okay so here is what ended up happening. Still not sure if it's the best solution, but if anybody comes looking for the answer to this question I did figure out a way to make it work.
With that said I still agree with Matt, and Hacked that there should be a simpler way to do this.
code :
this.ToTable("Posts", ConfigurationHelper.GetSiteSchema());
    public static string GetSiteSchema()
    {
        return ConfigurationManager.AppSettings["SiteSchema"];
    }
 <appSettings>
    <add key="ClientValidationEnabled" value="true" />
    <add key="UnobtrusiveJavaScriptEnabled" value="true" />
    <add key="SiteSchema" value="dbo1"/>
  </appSettings> 
Entity Framework: dynamically change model based on plugins found with MEF

Entity Framework: dynamically change model based on plugins found with MEF


By : Bart Mason
Date : March 29 2020, 07:55 AM
Any of those help I have used MigrateDatabaseToLatestVersion Class.
I have created CompositeDataContextInitializer and changed my DataContextFactory to pass it to my DataContext as argument.
code :
public class CompositedDataContextInitializer : MigrateDatabaseToLatestVersion<DataContext, Migrations.MigrationConfiguration>
{
    protected virtual void Seed(DataContext context)
    {
        if (context == null) throw new ArgumentNullException(nameof(context));
        foreach (var seeder in ServiceLocator.Current.GetAllInstances<IDataSeeder>())
        {
            seeder.Seed(context);
        }
    }
}


[Export(typeof(IDbContextFactory<DbContext>))]
[PartCreationPolicy(CreationPolicy.Shared)]
public class ContextFromCompositionFactory : IDbContextFactory<DbContext>, IDbContextFactory<DataContext>
{
    public DbContext Create() => new DataContext(ServiceLocator.Current.GetAllInstances<IModelCreator>(), new CompositedDataContextInitializer());

    DataContext IDbContextFactory<DataContext>.Create() => (DataContext)Create();
}


public interface IModelCreator
{
    void OnModelCreating(DbModelBuilder modelBuilder);
}

public class DataContext : DbContext
{
    public DataContext(IEnumerable<IModelCreator> modelCreators, IDatabaseInitializer<DataContext> initializer)
    {
        ModelCreators = modelCreators;
        if (initializer != null)
        {
            Database.SetInitializer(initializer);
        }
    }

    private IEnumerable<IModelCreator> ModelCreators { get; }

    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {

        foreach (var creator in ModelCreators)
        {
            creator.OnModelCreating(modelBuilder);
        }
    }
}
VS C# Data Model: CS1061: 'entity' does not contain a definition for 'tablename'

VS C# Data Model: CS1061: 'entity' does not contain a definition for 'tablename'


By : Laercio Lima
Date : March 29 2020, 07:55 AM
help you fix your problem Most probably when you change the SQL Table schema, your app was not able to find exactly the mapped table to the context. In other words: it lost the sync with the SQL Db.
If you're using "EF DbContext Generator" you must open the '.tt' file and re add the table.
How do I dynamically change dynamodb tablename in c# using object persistence model

How do I dynamically change dynamodb tablename in c# using object persistence model


By : Toby Pop
Date : March 29 2020, 07:55 AM
hope this fix your issue Use the overload of the LoadAsync method that accepts a DynamoDBOperationConfig:
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