why I got error The entity type LAB_INVOICE_VIEW is not part of the model for the current context.?-CodePudding

I am using VS2015 and tried to add new table to my entity data model but when I saved it its deleted all data under file context.cs file and showed errors all models used before deleted from entity model,

So I tried to manually add the Model to my DBcontext I found the steps in this link :

https://stackoverflow.com/questions/33426289/manually-create-model-for-single-table-in-entity-framework

I did the following steps :

1- created the database view LAB_INVOICE_VIEW

2- created the model

3- added manually the model to my DBcontext :

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

4- added the configuration also to the model under the model columns :

class MyTableConfiguration : EntityTypeConfiguration<LAB_INVOICE_VIEW>
    {
        public MyTableConfiguration()
        {
            ToTable("dbo.LAB_INVOICE_VIEW");
        }
    }

5- added the override code to Dbcontext.cs :

protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
           
            base.OnModelCreating(modelBuilder);
            modelBuilder.Configurations.Add(new MyTableConfiguration());
        }

6- I changed the connection string from EF string to ADO.NET string but I got the errors :

An exception of type 'System.Data.Entity.ModelConfiguration.ModelValidationException' occurred in EntityFramework.dll but was not handled in user code

Additional information: One or more validation errors were detected during model generation:



AljawdahNewSite.Models.Customers: : EntityType 'Customers' has no key defined. Define the key for this EntityType.

AljawdahNewSite.Models.Departments: : EntityType 'Departments' has no key defined. Define the key for this EntityType.

AljawdahNewSite.Models.Customers_Price_List: : EntityType 'Customers_Price_List' has no key defined. Define the key for this EntityType.

AljawdahNewSite.Models.LabTests: : EntityType 'LabTests' has no key defined. Define the key for this EntityType.

AljawdahNewSite.Models.Groups: : EntityType 'Groups' has no key defined. Define the key for this EntityType.

AljawdahNewSite.Models.Lab_Sample_status: : EntityType 'Lab_Sample_status' has no key defined. Define the key for this EntityType.

AljawdahNewSite.Models.Patients: : EntityType 'Patients' has no key defined. Define the key for this EntityType.

7- I tried the solutions in the link but still got the error :

https://stackoverflow.com/questions/20688922/the-entity-type-type-is-not-part-of-the-model-for-the-current-context

please I need your help .

CodePudding user response：

I deleted the EDMX file and created new EF again and added all models , This solved my issue .

Thank you Mr Gert