ObjectQuery<T>.Intersect(ObjectQuery<T>) ObjectQuery<T>.Intersect(ObjectQuery<T>) ObjectQuery<T>.Intersect(ObjectQuery<T>) ObjectQuery<T>.Intersect(ObjectQuery<T>) Method

Definición

Limita los resultados de la consulta incluyendo solo los resultados existentes en otra consulta de objeto.Limits the query results by including only the results that exist in another object query.

public:
 System::Data::Objects::ObjectQuery<T> ^ Intersect(System::Data::Objects::ObjectQuery<T> ^ query);
public System.Data.Objects.ObjectQuery<T> Intersect (System.Data.Objects.ObjectQuery<T> query);
member this.Intersect : System.Data.Objects.ObjectQuery<'T> -> System.Data.Objects.ObjectQuery<'T>
Public Function Intersect (query As ObjectQuery(Of T)) As ObjectQuery(Of T)

Parámetros

query
ObjectQuery<T> ObjectQuery<T> ObjectQuery<T> ObjectQuery<T>

ObjectQuery<T> que representa los resultados que hay que incluir en la consulta.An ObjectQuery<T> that represents the results to include in the query.

Devoluciones

Nueva instancia de ObjectQuery<T> que es equivalente a la instancia original, pero aplicando INTERSECT basándose en la query especificada.A new ObjectQuery<T> instance that is equivalent to the original instance with INTERSECT applied based on the specified query.

Excepciones

El parámetro query es null o una cadena vacía.The query parameter is null or is an empty string.

Ejemplos

El ejemplo de este tema se basa en el modelo AdventureWorks Sales.The example in this topic is based on the AdventureWorks Sales Model. En este ejemplo, se crea un nuevo objeto ObjectQuery<T> que contiene los resultados de otras dos consultas.This example creates a new ObjectQuery<T> object that contains the results of two other queries.

int productID1 = 900;
int productID2 = 950;
using (AdventureWorksEntities context =
    new AdventureWorksEntities())
{
    string queryString = @"SELECT VALUE product 
        FROM AdventureWorksEntities.Products 
        AS product WHERE product.ProductID > @productID1";

    ObjectQuery<Product> productQuery =
        new ObjectQuery<Product>(queryString,
            context, MergeOption.NoTracking);

    string queryString2 = @"SELECT VALUE product 
        FROM AdventureWorksEntities.Products 
        AS product WHERE product.ProductID > @productID2";

    ObjectQuery<Product> productQuery2 =
        new ObjectQuery<Product>(queryString2,
            context, MergeOption.NoTracking);

    ObjectQuery<Product> productQuery3 =
        productQuery.Intersect(productQuery2);

    productQuery3.Parameters.Add(new ObjectParameter("productID1", productID1));
    productQuery3.Parameters.Add(new ObjectParameter("productID2", productID2));

    Console.WriteLine("Result of Intersect");
    Console.WriteLine("------------------");

    // Iterate through the collection of Product items
    // after the Intersect method was called.
    foreach (Product result in productQuery3)
    {
        Console.WriteLine("Product Name: {0}", result.ProductID);
    }
}
Dim productID1 = 900
Dim productID2 = 950

Using context As New AdventureWorksEntities()
    Dim queryString As String = "SELECT VALUE product FROM AdventureWorksEntities.Products " & _
            " AS product WHERE product.ProductID > @productID1"

    Dim productQuery As New ObjectQuery(Of Product)(queryString, context, MergeOption.NoTracking)

    Dim queryString2 As String = "SELECT VALUE product FROM AdventureWorksEntities.Products " & _
        " AS product WHERE product.ProductID > @productID2"

    Dim productQuery2 As New ObjectQuery(Of Product)(queryString2, context, MergeOption.NoTracking)

    Dim productQuery3 As ObjectQuery(Of Product) = productQuery.Intersect(productQuery2)
    productQuery3.Parameters.Add(New ObjectParameter("productID1", productID1))
    productQuery3.Parameters.Add(New ObjectParameter("productID2", productID2))

    Console.WriteLine("Result of Intersect")
    Console.WriteLine("------------------")

    ' Iterate through the collection of Product items 
    ' after the Intersect method was called. 
    For Each result As Product In productQuery3
        Console.WriteLine("Product Name: {0}", result.ProductID)
    Next
End Using

Comentarios

Suministrado query que define los resultados que incluir debe ser del mismo tipo o de un tipo que es compatible con la ObjectQuery<T>.The supplied query that defines results to include must be of the same type or of a type that is compatible with the ObjectQuery<T>.

Parámetros que se definen en proporcionado query se combinan con los parámetros que se definen en el ObjectQuery<T> instancia.Parameters that are defined in the supplied query are merged with parameters that are defined in the ObjectQuery<T> instance. Los parámetros deben ser únicos en la ObjectParameterCollection combinada.Parameters must be unique in the combined ObjectParameterCollection. No puede haber dos parámetros en la colección combinada con el mismo nombre.There cannot be two parameters in the combined collection with the same name. Para obtener más información, consulte métodos del generador de consultas.For more information, see Query Builder Methods.

La consulta resultante hereda la conexión de la instancia de ObjectQuery<T> en la que se llamó al método Intersect.The resulting query inherits the connection from the ObjectQuery<T> instance on which the Intersect method was called.

Se aplica a

Consulte también: