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.edmx and ADD DEFAULT

Posted on 2010-09-14
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Last Modified: 2013-11-11
Hi experts, I am using linq entity framework for recording data, but I have a problem with the default values
ALTER TABLE [certified]. [Activity] ADD DEFAULT ('1 ') FOR [SituacionRegistro]
my question is, as I work on .edmx to take the default

in my column model .edmx  is not SituacionRegistro
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Question by:enrique_aeo
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Expert Comment

by:Fernando Soto
Comment Utility
Not sure of your question. Are you try to update/insert into the database a default value or are you trying to read from the database a null value and trying to assign a default into the model?
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Author Comment

by:enrique_aeo
Comment Utility
Hi, I'm trying to insert a record and the default value of SituacionRegistro column in the database is not working, always insert null value
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Expert Comment

by:Fernando Soto
Comment Utility
Please post your code.
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Author Comment

by:enrique_aeo
Comment Utility
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LVL 62

Expert Comment

by:Fernando Soto
Comment Utility
The only thing that I can see is that you are defining this in the database

ALTER TABLE [certified]. [Activity] ADD DEFAULT ('1 ') FOR [SituacionRegistro]

the default is being set to '1 ' where the max chars is 1 try changing '1 ' to '1'
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Author Comment

by:enrique_aeo
Comment Utility
the code in the database is well
ALTER TABLE [certifica].[Actividad] ADD  DEFAULT ('1') FOR [SituacionRegistro]

I tried entering data with transact sql (insert into) and runs the default.

I assume that the error is in the LINQ
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Expert Comment

by:Fernando Soto
Comment Utility
Are you sending the field SituacionRegistro in the insert?
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Author Comment

by:enrique_aeo
Comment Utility
he who does the recording is the same model with this method
 public Actividad CrearActividad(Actividad ActividadACrear)
        {
            db.AddToActividad(ActividadACrear);
            Grabar();
            return ActividadACrear;
        }

when I call this method, do not send SituacionRegistro
 actividad = new Actividad();
                    actividad.CodigoActividad = codigoActividad;
                    actividad.NombreActividad = txtNombreCurso.Text.Trim();
                    actividad.NombreSede = txtNombreSede.Text.Trim();
                    actividad.FechaInicio = txtFechaInicio.Text.Trim();
                    actividad.FechaFin = txtFechaFin.Text.Trim();
                    actividad.DirigidoA = txtDirigido.Text.Trim();
                    actividad.NombrePrograma = txtNombrePrograma.Text.Trim();
                    actividad.NumeroResolucion = txtNumeroResolucion.Text.Trim();
                    actividad.HorasLectivas = txtHorasLectivas.Text.Trim();
                    actividad.UsuarioCreacion = Session["userConnected"].ToString();
                    actividad.FechaCreacion = DateTime.Now;
                    repositorio.CrearActividad(actividad);
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Expert Comment

by:Fernando Soto
Comment Utility
Try setting this in the above code.

actividad.SituacionRegistro = null;
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Author Comment

by:enrique_aeo
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I made the change, but the problem persists, ie does not insert the default value is defined in the database
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Expert Comment

by:Fernando Soto
Comment Utility
Do you have a SQL Profiler to see what SQL query is being sent to the server?
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Author Comment

by:enrique_aeo
Comment Utility
NULL arrives, VIEW ATTACHED
traceSituacionRegistro.jpg
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Expert Comment

by:Fernando Soto
Comment Utility
Hi enrique_aeo;

In doing some research on the net I have found that Default Values assigned at the server are not supported in EF. I have test this and it seems to be true on VS 2010 as well. The only way I have found to get around this is to set the EF Default Value for that column in the model. To do this you can do the following:

1. Open the EF designer.
2. On the table that you want to assign default values to, right click on the column name and select
     Properties from the context menu.
3. In the Properties window select the Default Value property and set the value in the text box to the right
    to the default value you wanted for that column.

That should do it.

Fernando
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Author Comment

by:enrique_aeo
Comment Utility
I made the change in 2 ways
1. property change in the model and kept the default value in the database
2. property change in the model and delete the default value in the database
In no case does
situacionRegistroEDM.jpg
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Expert Comment

by:Fernando Soto
Comment Utility
I did my test using VS 2010, what version are you running?
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Author Comment

by:enrique_aeo
Comment Utility
vs 2008
this would be the problem?
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Accepted Solution

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Fernando Soto earned 250 total points
Comment Utility
You may want to look at the ObjectContext.SavingChanges Event and check all the values that have default values and set them here.

ObjectContext.SavingChanges Event
http://msdn.microsoft.com/en-us/library/system.data.objects.objectcontext.savingchanges.aspx

It is about all I can think of doing at this point.
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Author Closing Comment

by:enrique_aeo
Comment Utility
Thank you very much, hope can help with another problem (ID: 26473224 - LINQ-The data reader is incompatible with)
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