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POHow to retrive the Data from More than one Repository entity?
 

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  1. POHow to retrive the Data from More than one Repository entity?
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    <p>In my MVC application, i have created generic repository for Performing CRUD opration instead of directly using Context object.</p> <p>Context Class name{EDMX]: CustomEntity.Edmx</p> <p>Generic repository code: </p> <pre><code>public interface IRepository&lt;T&gt; : IDisposable where T : class { IQueryable&lt;T&gt; GetAll(); IEnumerable&lt;T&gt; Find(Expression&lt;Func&lt;T, bool&gt;&gt; predicate); T FindFirst(Expression&lt;Func&lt;T, bool&gt;&gt; predicate); T GetFirst(); T GetLast(); void Add(T entity); void Delete(T entity); void Update(T entity); void SaveChanges(); } public class GenericRepository&lt;T&gt; : IRepository&lt;T&gt; where T : class { private ObjectContext _context; private IObjectSet&lt;T&gt; _objectSet; public GenericRepository(ObjectContext context) { _context = context; _objectSet = _context.CreateObjectSet&lt;T&gt;(); } public IQueryable&lt;T&gt; GetAll() { return _objectSet; } public IEnumerable&lt;T&gt; Find(Expression&lt;Func&lt;T, bool&gt;&gt; predicate) { return _objectSet.Where&lt;T&gt;(predicate); } public T GetFirst() { return _objectSet.FirstOrDefault(); } public T FindFirst(Expression&lt;Func&lt;T, bool&gt;&gt; predicate) { return _objectSet.First&lt;T&gt;(predicate); } public T GetLast() { return _objectSet.LastOrDefault(); } public void Delete(T entity) { if (entity == null) { throw new ArgumentNullException("entity"); } _objectSet.DeleteObject(entity); } public void Add(T entity) { if (entity == null) { throw new ArgumentNullException("entity"); } _objectSet.AddObject(entity); } public void Update(T entity) { _context.ObjectStateManager.ChangeObjectState(entity, EntityState.Unchanged); _objectSet.Attach(entity); _context.ObjectStateManager.ChangeObjectState(entity, EntityState.Modified); } public void SaveChanges() { _context.SaveChanges(); } public void Dispose() { Dispose(true); GC.SuppressFinalize(this); } protected virtual void Dispose(bool disposing) { if (disposing) { if (_context != null) { _context.Dispose(); _context = null; } } } </code></pre> <p>Created Three Repository using genric repository:</p> <p>// CustomEntity-DataContext file[Edmx]</p> <pre><code> vat dat1=GenricRepository&lt;table1&gt; (new CustomEntity()); vat dat1=GenricRepository&lt;table2&gt; (new CustomEntity()); vat dat3=GenricRepository&lt;table3&gt; (new CustomEntity()); </code></pre> <p>here above created three repository for entities, these are referred same context. i would like retrieve data from three Repository in a single query like LinQ .</p> <p>but i can do this directly In context[EDMX] by:</p> <pre><code>Using(CustomEntity custom=new CustomEntity()) { var reocrds=(from t1 in custom.table1 from t2 in custom.table2 from t3 in custom.table3 where t1.id==t2.id&amp;&amp;t1.cusid==t3.cusid select t1).ToList(); } </code></pre> <p>can you please suggest how to retrieve the data[same query above in context] from repository entity dat1,dat2,dat3</p>
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    1. PTQuestion
    1. USAnandh
    1. USAnandh
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    1. COHi Michael, i want to get the Platform list from SU_Platform and arranged in sort order from SU_PlatformSortOrder . i want to combine into sinqle query var list=from plat in _forumPlatforms from sortorder in _forumcontrols where plt.pid==sortordr.pis select new{key=sortorder.pid,value=plat.platname}).tolist();
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      1. POHow to retrive the Data from More than one Repository entity?
      1. USAnandh
    2. COI don't think I understand what's the point of having `SU_PlatformSortOrder`? Is there a relationship between `SU_Platforms` and `SU_PlatformSortOrder`?
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      1. POHow to retrive the Data from More than one Repository entity?
      1. USSOfanatic
    3. COIf there is a relationship between t1 and t2 and between t1 and t3 (they rather should be), there is no need to make "your own join" in code - all the job is done by ORM. For example, if there is a one-to-many relationship between t1 and t2 (it means t1 can have many of t2s), in t1 class should be property of type List<t2>. Check your entity classes and if if you will have problem, show us a fragment of code.
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      1. POHow to retrive the Data from More than one Repository entity?
      1. USRobert Skarżycki
 

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