ObjectParameterCollection.Count 屬性

定義

命名空間:

System.Data.Objects

組件:

System.Data.Entity.dll

取得目前位於集合中的參數數目。

public:
 property int Count { int get(); };

public int Count { get; }

member this.Count : int

Public ReadOnly Property Count As Integer

屬性值

Int32

目前位於集合中的 ObjectParameter 物件數目。

實作

Count

範例

本範例會將新的參數新增至集合，並取得集合中參數的計數。 然後，它會逐一查看 ObjectParameterCollection 並顯示集合中每個參數的名稱、型別和值。

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);
    }
}

另請參閱

• (Entity Framework) ，將數據查詢為物件和成形結果