Bind Data Grid View from two tables using Entity framework

Question

I am working on a Windows Forms Application and am using C#, entity framework. i have two tables in database battalion and brigtype. REALATION BETWEEN THEM USING ID.

i am trying to show those two tables in data grid view but one of them only appears. Here is the code I tried: '''

 private void PopulateDataGridView()
    {
        
        using (Data.battdbEntities db = new Data.battdbEntities())
        {
            dgv.AutoGenerateColumns = true;
            dgv.DataSource = db.battalions.ToList();
        }
     }

'''

Answer 1

Currently you are only binding battalions to DataSource . In order to have brigtype data on the relation ID as you mentioned you need to join them on ID column:

dataGridView1.DataSource = (from s in db.battalions
                            join c in db.brigtypes on s.ID equals c.ID  
                            //where condtion if any                                             
                            select new
                            {
                                //Column list here
                            }).ToList();

OR Documentation

dataGridView1.DataSource =     db.battalions.Join(
                               db.brigtypes,
                               battalion => battalion.ID,
                               brigtype => brigtype.ID,
                               (battalion, brigtype) => new
                                {
                                   //Your columns here
                                }).ToList();

If your DBContext battdbEntities has not added the brigtypes then you have to add that table also to context some thing like below -

How to add table in Entity Framework?

Answer 2

Why don't you try to make View and bind the data in gridview.

https://www.w3resource.com/sql/creating-views/create-view-with-join.php

Try this.