Handle multiple result from a stored procedure with SqlQuery
The DbContext
has no native support for materialising multiple resultsets. However, it is reasonably straight forward to achieve by dropping down to the ObjectContext
and using the Translate
method to copy results from a DbDataReader
into entities in your domain model.
Here's some example code. This assumes your ReferrerStatisticResult
is just a container for the two lists called Set1
and Set2
. Obviously adjust according to your actual domain model.
// Create container ready for the resultsets
var result = new RefererStatisticResult();
using (var myContext = new MyContext())
{
// Create command from the context in order to execute
// the `GetReferrer` proc
var command = myContext.Database.Connection.CreateCommand();
command.CommandType = System.Data.CommandType.StoredProcedure;
command.CommandText = "[dbo].[GetReferrer]";
// add in command parameters
// (not shown)
try
{
myContext.Connection.Open();
var reader = command.ExecuteReader();
// Drop down to the wrapped `ObjectContext` to get access to
// the `Translate` method
var objectContext = ((IObjectContextAdapter)myContext).ObjectContext;
// Read Entity1 from the first resultset
result.Set1 = objectContext.Translate<Entity1>(reader, "Set1", MergeOptions.AppendOnly);
// Read Entity2 from the second resultset
reader.NextResult();
result.Set2 = objectContext.Translate<Entity2>(reader, "Set2", MergeOptions.AppendOnly);
}
finally
{
myContext.Database.Connection.Close();
}
}