DeltaWare.SDK.EntityFrameworkCore 5.0.1.1

SQL Stored Procedures

This middle-ware is intended to provide a simple and straightforward way of executing stored procedures. The current implementation handles creation of the SQL Command, opening and closing a connection, disposing of instances and mapping the return type.

Supported Return Type

• Scalar ExecuteScalarAsync<int>();
• Types ExecuteAsync<MyType>();
• Lists ExecuteAsync<List<MyType>>();

Executing an SQL Stored Procedure.

NOTE: SQL Stored Procedures can only be executed when using UseSqlServer, otherwise a MethodAccessException will be thrown.

There are presently three ways of assigned parameters to an SQL stored procedure.

1. Anonymous type mapping
2. Direct type mapping NOTE: Direct type mapping supports property selection.
3. SQL Parameters Building

Anonymous Code Mapping

public Task<ReturnType> RunSomethingAsnc(string myParameterA, int myParamaterB, DateTime myParamaterB)
	return _myDbContext
		.RunSqlStoredProcedure("{MyStoredProcedure}")
		.WithParameters(new
		{
		    myParameterA,
		    MYPARAMETERB = myParameterB,
		    MyPARAMETERc = myParameterC
		})
		.ExecuteAsync<ReturnType>();
	}

In the above example the following code will map to.

EXEC [dbo].[MyStoredProcedure]
		@myParameterA = 'Some text',
		@MYPARAMETERB = '42',
		@MyPARAMETERc = '01-01-2012'

Direct Type Mapping

public class MyType
{
	public string Title { get; set; }
	public DateTime endDate { get; set;}
}

public Task<List<ReturnType>> DoSomethingElseAsync(MyType parameterA)
{
	return _myDbContext
		.RunSqlStoredProcedure("{MyOtherStoredProcedure}")
		.WithParameters(parameterA)
		.ExecuteAsync<List<ReturnType>>();
}

In the above example the following code will map to.

EXEC [dbo].[MyOtherStoredProcedure]
		@Title = 'Dr',
		@endDate = '01-01-2012'

Using Property Selection

public Task<List<ReturnType>> DoSomethingElseAsync(MyType parameterA)
{
	return _myDbContext
		.RunSqlStoredProcedure("{MyOtherStoredProcedure}")
		.WithParameters(parameterA, p => new { p.Title })
		.ExecuteAsync<List<ReturnType>>();
}

In the above example the following code will map to.

EXEC [dbo].[MyOtherStoredProcedure]
		@Title = 'Dr'

SQL Parameter Builder

public Task<ReturnType> RunAnotherThingAsync(string myParameterA, int myParamaterB, DateTime myParamaterB)
	return _myDbContext
		.RunSqlStoredProcedure("{MyStoredProcedure}")
		.WithParameters(b => 
		{
			b.AddParameter("@myParameterA", SqlDbType.VarChar, myParameterA);
			b.AddParameter("@MYPARAMETERB", SqlDbType.Int, myParameterB);
			b.AddParameter("@MyPARAMETERc", SqlDbType.Date, myParameterC);			
		})
		.ExecuteAsync<ReturnType>();
	}

In the above example the following code will map to.

EXEC [dbo].[MyStoredProcedure]
		@myParameterA = 'Some text',
		@MYPARAMETERB = '42',
		@MyPARAMETERc = '01-01-2012'

Stored Procedure Options

Set Command Timeout

.RunSqlStoredProcedure("{MyStoredProcedure}", o => 
{
	o.Timeout = 1472;
})