ObjectParameterCollection.Count Propriedade

Definição

Obtém o número de parâmetros que estão na coleção no momento.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

Valor da propriedade

Int32

O número de ObjectParameter objetos que estão atualmente na coleção.The number of ObjectParameter objects that are currently in the collection.

Implementações

Exemplos

O exemplo neste tópico é baseado no Microsoft SQL Server exemplos de produto: banco de dados.The example in this topic is based on the Microsoft SQL Server Product Samples: Database. O exemplo adiciona novos parâmetros à coleção e obtém a contagem dos parâmetros na coleção.The example adds new parameters to the collection and gets the count of the parameters in the collection. Em seguida, ele faz a iteração através do ObjectParameterCollection e exibe o nome, o tipo e o valor de cada parâmetro na coleção.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

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