ObjectQuery<T>.Intersect(ObjectQuery<T>) メソッド

定義

別のオブジェクト クエリに存在する結果のみを含めることで、クエリの結果を制限します。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)

パラメーター

query
ObjectQuery<T>

クエリに含める結果を表す ObjectQuery<T>An ObjectQuery<T> that represents the results to include in the query.

戻り値

指定された query に基づいて INTERSECT が適用された元のインスタンスに相当する、新しい ObjectQuery<T> インスタンス。A new ObjectQuery<T> instance that is equivalent to the original instance with INTERSECT applied based on the specified query.

例外

query パラメーターが null または空の文字列です。The query parameter is null or is an empty string.

このトピックの例は、 AdventureWorks Sales Modelに基づいています。The example in this topic is based on the AdventureWorks Sales Model. この例では、他の 2 つのクエリの結果を含む ObjectQuery<T> オブジェクトを新たに作成します。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

注釈

含める結果queryを定義する指定されたは、 ObjectQuery<T>と互換性のある型または型である必要があります。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>.

指定queryされたで定義されているパラメーターは、 ObjectQuery<T>インスタンスで定義されているパラメーターとマージされます。Parameters that are defined in the supplied query are merged with parameters that are defined in the ObjectQuery<T> instance. パラメーターは、結合された ObjectParameterCollection 内で一意である必要があります。Parameters must be unique in the combined ObjectParameterCollection. 結合されたコレクション内に同じ名前のパラメーターが 2 つ存在することはできません。There cannot be two parameters in the combined collection with the same name. 詳細については、「クエリビルダーメソッド」を参照してください。For more information, see Query Builder Methods.

結果のクエリは、ObjectQuery<T> メソッドが呼び出された Intersect インスタンスから接続を継承します。The resulting query inherits the connection from the ObjectQuery<T> instance on which the Intersect method was called.

適用対象

こちらもご覧ください