OdbcDataAdapter.SelectCommand Özellik

Tanım

Ad Alanı:
System.Data.Odbc
Bütünleştirilmiş Kod:
System.Data.Odbc.dll
Bütünleştirilmiş Kod:
System.Data.dll
Paket:
System.Data.Odbc v11.0.0-preview.4.26230.115
Kaynak:
OdbcDataAdapter.cs
Kaynak:
OdbcDataAdapter.cs
Kaynak:
OdbcDataAdapter.cs
Kaynak:
OdbcDataAdapter.cs

Veri kaynağındaki kayıtları seçmek için kullanılan bir SQL deyimini veya saklı yordamı alır veya ayarlar.

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

Özellik Değeri

OdbcCommand

Bir OdbcCommand doldurma işlemi sırasında veri kaynağından kayıtları içinde yerleştirecek DataSetşekilde seçmek için kullanılan bir.

Örnekler

Aşağıdaki örnek bir OdbcDataAdapter oluşturur ve ve SelectCommand özelliklerini ayarlarInsertCommand. Zaten bir OdbcConnection nesne oluşturduğunuz varsayılır.

public static OdbcDataAdapter CreateDataAdapter(
    OdbcConnection connection)
{
    string selectCommand =
        "SELECT CustomerID, CompanyName FROM Customers";

    OdbcDataAdapter adapter = new OdbcDataAdapter(
        selectCommand, connection);
    adapter.MissingSchemaAction = MissingSchemaAction.AddWithKey;

    // Create the Insert, Update and Delete commands.
    adapter.InsertCommand = new OdbcCommand(
        "INSERT INTO Customers (CustomerID, CompanyName) " +
        "VALUES (?, ?)");

    adapter.UpdateCommand = new OdbcCommand(
        "UPDATE Customers SET CustomerID = ?, CompanyName = ? " +
        "WHERE CustomerID = ?");

    adapter.DeleteCommand = new OdbcCommand(
        "DELETE FROM Customers WHERE CustomerID = ?");

    // Create the parameters.
    adapter.InsertCommand.Parameters.Add("@CustomerID",
        OdbcType.Char, 5, "CustomerID");
    adapter.InsertCommand.Parameters.Add("@CompanyName",
        OdbcType.VarChar, 40, "CompanyName");

    adapter.UpdateCommand.Parameters.Add("@CustomerID",
        OdbcType.Char, 5, "CustomerID");
    adapter.UpdateCommand.Parameters.Add("@CompanyName",
        OdbcType.VarChar, 40, "CompanyName");
    adapter.UpdateCommand.Parameters.Add("@oldCustomerID",
        OdbcType.Char, 5, "CustomerID").SourceVersion =
        DataRowVersion.Original;

    adapter.DeleteCommand.Parameters.Add("@CustomerID",
        OdbcType.Char, 5, "CustomerID").SourceVersion =
        DataRowVersion.Original;

    return adapter;
}

Public Function CreateDataAdapter( _
    ByVal connection As OdbcConnection) As OdbcDataAdapter

    Dim selectCommand As String = _
        "SELECT CustomerID, CompanyName FROM Customers"
    Dim adapter As OdbcDataAdapter = _
        New OdbcDataAdapter(selectCommand, connection)

    adapter.MissingSchemaAction = MissingSchemaAction.AddWithKey

    ' Create the Insert, Update and Delete commands.
    adapter.InsertCommand = New OdbcCommand( _
        "INSERT INTO Customers (CustomerID, CompanyName) " & _
         "VALUES (?, ?)")

    adapter.UpdateCommand = New OdbcCommand( _
        "UPDATE Customers SET CustomerID = ?, CompanyName = ? " & _
        "WHERE CustomerID = ?")

    adapter.DeleteCommand = New OdbcCommand( _
        "DELETE FROM Customers WHERE CustomerID = ?")

    ' Create the parameters.
    adapter.InsertCommand.Parameters.Add( _
        "@CustomerID", OdbcType.Char, 5, "CustomerID")
    adapter.InsertCommand.Parameters.Add( _
        "@CompanyName", OdbcType.VarChar, 40, "CompanyName")

    adapter.UpdateCommand.Parameters.Add( _
        "@CustomerID", OdbcType.Char, 5, "CustomerID")
    adapter.UpdateCommand.Parameters.Add( _
        "@CompanyName", OdbcType.VarChar, 40, "CompanyName")
    adapter.UpdateCommand.Parameters.Add( _
        "@oldCustomerID", OdbcType.Char, 5, "CustomerID").SourceVersion = _
        DataRowVersion.Original

    adapter.DeleteCommand.Parameters.Add( _
        "@CustomerID", OdbcType.Char, 5, "CustomerID").SourceVersion = _
        DataRowVersion.Original

    Return adapter
End Function

Açıklamalar

Önceden oluşturulmuş SelectCommandOdbcCommand bir öğesine atandığındaOdbcCommand, kopyalanmaz. Bunun yerine, SelectCommand daha önce oluşturulan OdbcCommand nesneye bir başvuru tutar.

Satır döndürmezse SelectCommand , öğesine DataSethiçbir tablo eklenmez ve hiçbir özel durum tetiklenmez.

Şunlara uygulanır

Ayrıca bkz.