OleDbDataAdapter.SelectCommand 屬性

定義

命名空間:

System.Data.OleDb

組件:

System.Data.OleDb.dll

套件:

System.Data.OleDb v9.0.0-rc.2.24473.5

來源:

OleDbDataAdapter.cs

取得或設定用來在資料來源中選取資料錄的 SQL 陳述式或預存程序。

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

public System.Data.OleDb.OleDbCommand? SelectCommand { get; set; }

member this.SelectCommand : System.Data.OleDb.OleDbCommand with get, set

Public Property SelectCommand As OleDbCommand

屬性值

OleDbCommand

OleDbCommand，用來在 Fill(DataSet) 期間為 DataSet 中的位置從資料來源中選取資料錄。

範例

下列範例會 OleDbDataAdapter 建立 並設定 SelectCommand 和 InsertCommand 屬性。 假設您已經建立 OleDbConnection 物件。

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

備註

當 指定先前建立OleDbCommand的時SelectCommand，OleDbCommand不會複製 。 會 SelectCommand 維護先前建立 OleDbCommand 對象的參考。

SelectCommand如果 不會傳回任何數據列，則不會將任何數據表新增至 DataSet，而且不會引發任何例外狀況。

另請參閱

• DataAdapter 和 DataReader