Output parameter without specifying its name
I'm using Entity Framework 6.2.0. To execute a stored procedure with an output parameter in EF we have to do the following (also, on SO):
// Create a ObjectParameter instance to retrieve output parameter from stored procedure
ObjectParameter output = new ObjectParameter("ID", typeof(Int32));
context.InsertPerson(name, description, output);
A typical auto-generated InsertPerson() method looks like this:
public virtual int InsertPerson(string name, string description, ObjectParameter output)
{
var nameParameter = new ObjectParameter("name", name);
var descriptionParameter = new ObjectParameter("description", description);
return ((IObjectContextAdapter)this).ObjectContext.ExecuteFunction("InsertPerson", nameParameter , descriptionParameter , output);
}
So, InsertPerson() method requires the output parameter to be initialized with the actual SP parameter name and passed in to it.
But this doesn't make sense to me, because clients of the context shouldn't know names of actual SP output params. We're not required to know input param names. Then, why we have to know names of the output ones?
Moreover, after renaming the output param in SP and updating the EF model from DB, we neither are getting our code auto-updated accordingly, nor have a good way (compiler error) of knowing that our code is out of sync with the DB schema.
Why the method is not generated like this:
public virtual int InsertPerson(string name, string description, out int output)
{
var nameParameter = new ObjectParameter("name", name);
var descriptionParameter = new ObjectParameter("description", description);
var outputParameter = new ObjectParameter("ID", typeof(Int32));
var result = ((IObjectContextAdapter)this).ObjectContext.ExecuteFunction("InsertPerson", nameParameter , descriptionParameter , outputParameter);
output = outputParameter.Value;
return result;
}
How to execute a SP with an output parameter in EF without having to specify the parameter name?
c# .net entity-framework stored-procedures
asked Nov 21 '18 at 18:04
Alexander AbakumovAlexander Abakumov
4,55844169
add a comment |
I'm using Entity Framework 6.2.0. To execute a stored procedure with an output parameter in EF we have to do the following (also, on SO):
// Create a ObjectParameter instance to retrieve output parameter from stored procedure
ObjectParameter output = new ObjectParameter("ID", typeof(Int32));
context.InsertPerson(name, description, output);
A typical auto-generated InsertPerson() method looks like this:
public virtual int InsertPerson(string name, string description, ObjectParameter output)
{
var nameParameter = new ObjectParameter("name", name);
var descriptionParameter = new ObjectParameter("description", description);
return ((IObjectContextAdapter)this).ObjectContext.ExecuteFunction("InsertPerson", nameParameter , descriptionParameter , output);
}
So, InsertPerson() method requires the output parameter to be initialized with the actual SP parameter name and passed in to it.
But this doesn't make sense to me, because clients of the context shouldn't know names of actual SP output params. We're not required to know input param names. Then, why we have to know names of the output ones?
Moreover, after renaming the output param in SP and updating the EF model from DB, we neither are getting our code auto-updated accordingly, nor have a good way (compiler error) of knowing that our code is out of sync with the DB schema.
Why the method is not generated like this:
public virtual int InsertPerson(string name, string description, out int output)
{
var nameParameter = new ObjectParameter("name", name);
var descriptionParameter = new ObjectParameter("description", description);
var outputParameter = new ObjectParameter("ID", typeof(Int32));
var result = ((IObjectContextAdapter)this).ObjectContext.ExecuteFunction("InsertPerson", nameParameter , descriptionParameter , outputParameter);
output = outputParameter.Value;
return result;
}
How to execute a SP with an output parameter in EF without having to specify the parameter name?
c# .net entity-framework stored-procedures
asked Nov 21 '18 at 18:04
Alexander AbakumovAlexander Abakumov
4,55844169
add a comment |
I'm using Entity Framework 6.2.0. To execute a stored procedure with an output parameter in EF we have to do the following (also, on SO):
// Create a ObjectParameter instance to retrieve output parameter from stored procedure
ObjectParameter output = new ObjectParameter("ID", typeof(Int32));
context.InsertPerson(name, description, output);
A typical auto-generated InsertPerson() method looks like this:
public virtual int InsertPerson(string name, string description, ObjectParameter output)
{
var nameParameter = new ObjectParameter("name", name);
var descriptionParameter = new ObjectParameter("description", description);
return ((IObjectContextAdapter)this).ObjectContext.ExecuteFunction("InsertPerson", nameParameter , descriptionParameter , output);
}
So, InsertPerson() method requires the output parameter to be initialized with the actual SP parameter name and passed in to it.
But this doesn't make sense to me, because clients of the context shouldn't know names of actual SP output params. We're not required to know input param names. Then, why we have to know names of the output ones?
Moreover, after renaming the output param in SP and updating the EF model from DB, we neither are getting our code auto-updated accordingly, nor have a good way (compiler error) of knowing that our code is out of sync with the DB schema.
Why the method is not generated like this:
public virtual int InsertPerson(string name, string description, out int output)
{
var nameParameter = new ObjectParameter("name", name);
var descriptionParameter = new ObjectParameter("description", description);
var outputParameter = new ObjectParameter("ID", typeof(Int32));
var result = ((IObjectContextAdapter)this).ObjectContext.ExecuteFunction("InsertPerson", nameParameter , descriptionParameter , outputParameter);
output = outputParameter.Value;
return result;
}
How to execute a SP with an output parameter in EF without having to specify the parameter name?
c# .net entity-framework stored-procedures
asked Nov 21 '18 at 18:04
Alexander AbakumovAlexander Abakumov
4,55844169
I'm using Entity Framework 6.2.0. To execute a stored procedure with an output parameter in EF we have to do the following (also, on SO):
// Create a ObjectParameter instance to retrieve output parameter from stored procedure
ObjectParameter output = new ObjectParameter("ID", typeof(Int32));
context.InsertPerson(name, description, output);
A typical auto-generated InsertPerson() method looks like this:
public virtual int InsertPerson(string name, string description, ObjectParameter output)
{
var nameParameter = new ObjectParameter("name", name);
var descriptionParameter = new ObjectParameter("description", description);
return ((IObjectContextAdapter)this).ObjectContext.ExecuteFunction("InsertPerson", nameParameter , descriptionParameter , output);
}
So, InsertPerson() method requires the output parameter to be initialized with the actual SP parameter name and passed in to it.
But this doesn't make sense to me, because clients of the context shouldn't know names of actual SP output params. We're not required to know input param names. Then, why we have to know names of the output ones?
Moreover, after renaming the output param in SP and updating the EF model from DB, we neither are getting our code auto-updated accordingly, nor have a good way (compiler error) of knowing that our code is out of sync with the DB schema.
Why the method is not generated like this:
public virtual int InsertPerson(string name, string description, out int output)
{
var nameParameter = new ObjectParameter("name", name);
var descriptionParameter = new ObjectParameter("description", description);
var outputParameter = new ObjectParameter("ID", typeof(Int32));
var result = ((IObjectContextAdapter)this).ObjectContext.ExecuteFunction("InsertPerson", nameParameter , descriptionParameter , outputParameter);
output = outputParameter.Value;
return result;
}
How to execute a SP with an output parameter in EF without having to specify the parameter name?
c# .net entity-framework stored-procedures
c# .net entity-framework stored-procedures
asked Nov 21 '18 at 18:04
Alexander AbakumovAlexander Abakumov
4,55844169
asked Nov 21 '18 at 18:04
Alexander AbakumovAlexander Abakumov
4,55844169
edited Nov 21 '18 at 18:16
Alexander Abakumov
asked Nov 21 '18 at 18:04
Alexander AbakumovAlexander Abakumov
4,55844169
asked Nov 21 '18 at 18:04
Alexander AbakumovAlexander Abakumov
4,55844169
asked Nov 21 '18 at 18:04
Alexander AbakumovAlexander Abakumov
4,55844169
4,55844169
add a comment |
add a comment |
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