IDbDataAdapter.SelectCommand IDbDataAdapter.SelectCommand IDbDataAdapter.SelectCommand IDbDataAdapter.SelectCommand Property


データ ソース内のレコードを選択する SQL ステートメントを取得または設定します。Gets or sets an SQL statement used to select records in the data source.

 property System::Data::IDbCommand ^ SelectCommand { System::Data::IDbCommand ^ get(); void set(System::Data::IDbCommand ^ value); };
public System.Data.IDbCommand SelectCommand { get; set; }
member this.SelectCommand : System.Data.IDbCommand with get, set
Public Property SelectCommand As IDbCommand


データ セットに挿入するレコードをデータ ソースから選択するために、IDbCommand 中に使用する Update(DataSet)An IDbCommand that is used during Update(DataSet) to select records from data source for placement in the data set.

次の例では、継承OleDbDataAdapterされたクラスのインスタンスを作成し、プロパティSelectCommandInsertCommandプロパティを設定します。The following example creates an instance of the inherited OleDbDataAdapter class, and sets the SelectCommand and InsertCommand properties. OleDbConnectionオブジェクトが既に作成されていることを前提としています。It assumes you have already created an OleDbConnection object.

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);

        "CustomerID", OleDbType.Char, 5, "CustomerID");
        "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


以前SelectCommandに作成さIDbCommandれたにが割り当てIDbCommandられている場合、は複製されません。When SelectCommand is assigned to a previously created IDbCommand, the IDbCommand is not cloned. SelectCommand 、以前に作成されたIDbCommandオブジェクトへの参照を保持します。The SelectCommand maintains a reference to the previously created IDbCommand object.

が行を返さない場合、 DataSetにテーブルは追加されず、例外は発生しません。 SelectCommandIf the SelectCommand does not return any rows, no tables are added to the DataSet, and no exception is raised.