ObjectQuery.Parameters 屬性

定義

命名空間:
System.Data.Objects
組件:
System.Data.Entity.dll

取得這個物件查詢的參數集合。

public:
 property System::Data::Objects::ObjectParameterCollection ^ Parameters { System::Data::Objects::ObjectParameterCollection ^ get(); };
public System.Data.Objects.ObjectParameterCollection Parameters { get; }
member this.Parameters : System.Data.Objects.ObjectParameterCollection
Public ReadOnly Property Parameters As ObjectParameterCollection

屬性值

ObjectParameterCollection

此 ObjectQuery<T>參數集合。

範例

此範例會為集合新增參數，然後取得該 ObjectQuery<T>集合的參數集合。 接著它會遍歷 ， 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;

    // Iterate through the ObjectParameterCollection.
    foreach (ObjectParameter result in objectParameterCollection)
    {
        Console.WriteLine("{0} {1} {2}", result.Name,
            result.Value,
            result.ParameterType);
    }
}

備註

利用回傳 ObjectParameterCollection 的參數指定要傳遞給查詢的參數。 欲了解更多資訊，請參閱 查詢建構方法。

適用於

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