ObjectParameterCollection.Count プロパティ

定義

コレクション内に現在存在するパラメーターの数を取得します。Gets the number of parameters currently in the collection.

public:
 property int Count { int get(); };
public int Count { get; }
member this.Count : int
Public ReadOnly Property Count As Integer

プロパティ値

コレクション内に現在存在する ObjectParameter オブジェクトの数。The number of ObjectParameter objects that are currently in the collection.

実装

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、新しいパラメーターをコレクションに追加し、コレクション内のパラメーターの数を取得します。The example adds new parameters to the collection and gets the count of the parameters in the collection. 次に、ObjectParameterCollection を反復処理し、コレクション内の各パラメーターの名前、型、および値を表示します。Then it iterates through the ObjectParameterCollection and displays the name, type, and value of each parameter in the collection.

using (AdventureWorksEntities context =
    new AdventureWorksEntities())
{
    string queryString =
        @"SELECT VALUE contact FROM AdventureWorksEntities.Contacts 
        AS contact WHERE contact.LastName = @ln AND contact.FirstName = @fn";

    ObjectQuery<Contact> contactQuery =
        new ObjectQuery<Contact>(queryString, context);

    // Add parameters to the collection.
    contactQuery.Parameters.Add(new ObjectParameter("ln", "Adams"));
    contactQuery.Parameters.Add(new ObjectParameter("fn", "Frances"));

    ObjectParameterCollection objectParameterCollection =
        contactQuery.Parameters;

    Console.WriteLine("Count is {0}.", objectParameterCollection.Count);

    // Iterate through the ObjectParameterCollection collection.
    foreach (ObjectParameter result in objectParameterCollection)
    {
        Console.WriteLine("{0} {1} {2}", result.Name,
            result.Value,
            result.ParameterType);
    }
}
Using context As New AdventureWorksEntities()
    Dim queryString As String = "SELECT VALUE contact FROM AdventureWorksEntities.Contacts " & _
            " AS contact WHERE contact.LastName = @ln AND contact.FirstName = @fn"

    Dim contactQuery As New ObjectQuery(Of Contact)(queryString, context)

    ' Add parameters to the collection. 
    contactQuery.Parameters.Add(New ObjectParameter("ln", "Adams"))
    contactQuery.Parameters.Add(New ObjectParameter("fn", "Frances"))

    Dim objectParameterCollection As ObjectParameterCollection = contactQuery.Parameters

    Console.WriteLine("Count is {0}.", objectParameterCollection.Count)

    ' Iterate through the ObjectParameterCollection collection. 
    For Each result As ObjectParameter In objectParameterCollection
        Console.WriteLine("{0} {1} {2}", result.Name, result.Value, result.ParameterType)
    Next
End Using

適用対象

こちらもご覧ください