Why can't I get actual object from EntityDataSourceWrapper in Dynamic Data?

Question

User745141034 posted

code:          

object entity;            

 ICustomTypeDescriptor entityDescriptor= FormView1.DataItem as ICustomTypeDescriptor;            

if (entityDescriptor != null)            

 {                

entity = entityDescriptor.GetPropertyOwner(null);            

 }            

else

             {

                entity = FormView1.DataItem;

            }            

 System.Type t = entity.GetType();

t is type of "System.Data.Entity.DynamicProxies.Client_0DC1BF3A0B83758B13396E74DD9D6EFA02973CC4A4BD048F0C2CA22FF4862377",why?

Entity framework is 5.0   ,   .net framework is 4.5

How to get actual object from EntityDataSourceWrapper in Dynamic Data?

 

Answer 1

User-330204900 posted

Hi zzdfc, try this extension method I wrote :)

public static TEntity GetEntityAs<TEntity>(this object dataItem)
    where TEntity : class
{
    var entity = dataItem as TEntity;

    if (entity != null)
        return entity;

    var td = dataItem as ICustomTypeDescriptor;

    if (td != null)
        return (TEntity)td.GetPropertyOwner(null);

    return null;
}

public static Object GetEntity(this object dataItem)
{
    var td = dataItem as ICustomTypeDescriptor;

    if (td != null)
        return td.GetPropertyOwner(null);

    return null;
}

you us them like this

var presetSession = Row.GetEntityAs<Models.PersonSessionRecord>();

and the other like this

var entity = e.Item.DataItem.GetEntity();

Answer 2

User745141034 posted

Hi sjnaughton:

      I have already tried your method that can't get real object in EF5 and dynamic data 4.

But can get real type like this:

 var entity = e.Item.DataItem.GetEntity();

System.Type realType=ObjectContext.GetObjectType(entity);

thanks.

Answer 3

User3866881 posted

I have already tried your method that can't get real object in EF5 and dynamic data 4.

What does this mean？

Answer 4

User-330204900 posted

is this with VS2012?

Answer 5

User745141034 posted

This is with VS2012,.net 4.5,EF5,asp.net 4

Answer 6

User-330204900 posted

Hi zzdfc, I will try and have a look at that this weekend :)

Answer 7

User745141034 posted

???

Answer 8

User745141034 posted

Who can help me,please?

Answer 9

User-330204900 posted

Hi Zzdfc, I have tried my code and all works fine in VS2012 can you emil me direct so we can talk this through?

Answer 10

User745141034 posted

Hi sjnaughton:

 

object entity; 

ICustomTypeDescriptor entityDescriptor= FormView1.DataItem as ICustomTypeDescriptor;           

if (entityDescriptor != null)           

{               

entity = entityDescriptor.GetPropertyOwner(null);           

}           

else

             {

                entity = FormView1.DataItem;

            }           

System.Type t = entity.GetType();

t is type of "System.Data.Entity.DynamicProxies.Client_0DC1BF3A0B83758B13396E74DD9D6EFA02973CC4A4BD048F0C2CA22FF4862377",

but t actually is "System.Data.Entity.DynamicProxies.Client"

How to convert "System.Data.Entity.DynamicProxies.Client_0DC1BF3A0B83758B13396E74DD9D6EFA02973CC4A4BD048F0C2CA22FF4862377" to "System.Data.Entity.DynamicProxies.Client"?

Answer 11

User-330204900 posted

Hi Zzdfc, where is this code being run? and what are you trying to achive?

Answer 12

User745141034 posted

Hi sjnaughton:

 this code being run in edit.aspx.cs page:

protected void FormView1_DataBound(object sender, EventArgs e)        

 {

object entity;

ICustomTypeDescriptor entityDescriptor= FormView1.DataItem as ICustomTypeDescriptor;          

if (entityDescriptor != null)          

{              

entity = entityDescriptor.GetPropertyOwner(null);          

}          

else

             {

                entity = FormView1.DataItem;

            } 

}

 

How to convert entity from "System.Data.Entity.DynamicProxies.Client_0DC1BF3A0B83758B13396E74DD9D6EFA02973CC4A4BD048F0C2CA22FF4862377" to "System.Data.Entity.DynamicProxies.Client"?

Answer 13

User-330204900 posted

Ah, I think I under stand if you look at DataItem ther it will be null, not sure why but I have had the same issue I will try and build a repro and send it to the team thanks.

Answer 14

User-1150461690 posted

This is great!  Thanks!

Answer 15

User1837504520 posted

Use AutoMapper 4.2.1 It is having DynamicMap which can remove the Proxy from the object.

        var parents = parentsRepo.GetAll().ToList();
        Mapper.CreateMap<Parent,ParentDto>();
        var parentsDto = Mapper.DynamicMap<List<ParentDto>>(parents);