IDbDataAdapter.SelectCommand Özellik

public:
 property System::Data::IDbCommand ^ SelectCommand { System::Data::IDbCommand ^ get(); void set(System::Data::IDbCommand ^ value); };

public System.Data.IDbCommand? SelectCommand { get; set; }

public System.Data.IDbCommand SelectCommand { get; set; }

member this.SelectCommand : System.Data.IDbCommand with get, set

Public Property SelectCommand As IDbCommand

Özellik Değeri

IDbCommand sırasında veri kümesine yerleştirilmek üzere veri kaynağından kayıtları seçmek için kullanılan Update(DataSet) bir.

Örnekler

Aşağıdaki örnek devralınan OleDbDataAdapter sınıfın bir örneğini oluşturur ve ve InsertCommand özelliklerini ayarlarSelectCommand. Zaten bir OleDbConnection nesne oluşturduğunuz varsayılır.

public static OleDbDataAdapter CreateCustomerAdapter(
    OleDbConnection connection)
{
    OleDbDataAdapter adapter = new OleDbDataAdapter();
    OleDbCommand command;

    // Create the SelectCommand.
    command = new OleDbCommand("SELECT * FROM Customers " +
        "WHERE Country = ? AND City = ?", connection);

    command.Parameters.Add("Country", OleDbType.VarChar, 15);
    command.Parameters.Add("City", OleDbType.VarChar, 15);

    adapter.SelectCommand = command;

    // Create the InsertCommand.
    command = new OleDbCommand(
        "INSERT INTO Customers (CustomerID, CompanyName) " +
        "VALUES (?, ?)", connection);

    command.Parameters.Add(
        "CustomerID", OleDbType.Char, 5, "CustomerID");
    command.Parameters.Add(
        "CompanyName", OleDbType.VarChar, 40, "CompanyName");

    adapter.InsertCommand = command;
    return adapter;
}

Public Shared Function CreateCustomerAdapter( _
    connection As OleDbConnection) As OleDbDataAdapter 

    Dim adapter As New OleDbDataAdapter()
    Dim command As OleDbCommand

    ' Create the SelectCommand.
    command = New OleDbCommand("SELECT * FROM Customers " & _
        "WHERE Country = ? AND City = ?", connection)

    command.Parameters.Add("Country", OleDbType.VarChar, 15)
    command.Parameters.Add("City", OleDbType.VarChar, 15)

    adapter.SelectCommand = command

    ' Create the InsertCommand.
    command = New OleDbCommand( _
        "INSERT INTO Customers (CustomerID, CompanyName) " & _
        "VALUES (?, ?)", connection)

    command.Parameters.Add( _
        "CustomerID", OleDbType.Char, 5, "CustomerID")
    command.Parameters.Add( _
        "CompanyName", OleDbType.VarChar, 40, "CompanyName")

    adapter.InsertCommand = command
    Return adapter
End Function

Açıklamalar

önceden oluşturulmuş IDbCommandIDbCommand bir öğesine atandığında SelectCommand kopyalanmaz. , SelectCommand daha önce oluşturulan IDbCommand nesneye bir başvuru tutar.

SelectCommand herhangi bir satır döndürmezse, öğesine DataSettablo eklenmez ve hiçbir özel durum tetiklenmez.

Şunlara uygulanır