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OracleDataAdapter.DeleteCommand Property

Note: This namespace, class, or member is supported only in version 1.1 of the .NET Framework.

Gets or sets an SQL statement or stored procedure used to delete records in the database.

[Visual Basic]
Public Shadows Property DeleteCommand As OracleCommand
[C#]
public new OracleCommand DeleteCommand {get; set;}
[C++]
public: __property OracleCommand* get_DeleteCommand();
public: __property void set_DeleteCommand(OracleCommand*);
[JScript]
public hide function get DeleteCommand() : OracleCommand;
public function set DeleteCommand(OracleCommand);

Property Value

An OracleCommand used during an update operation to delete records in the database that correspond to deleted rows in the DataSet.

Remarks

When the DeleteCommand property is assigned to a previously created OracleCommand, the OracleCommand is not cloned. Instead, the DeleteCommand maintains a reference to the previously created OracleCommand.

During an update operation, if DeleteCommand is not set and primary key information is present in the DataSet, you can use the OracleCommandBuilder class to automatically generate the DeleteCommand, and additional commands needed to reconcile the DataSet to the database. To do this, set the SelectCommand property of the OracleDataAdapter. The generation logic also requires key column information to be present in the DataSet. For more information see Automatically Generated Commands.

Example

[Visual Basic, C#, C++] The following example creates an OracleDataAdapter and sets the SelectCommand and DeleteCommand properties. It assumes you have already created an OracleConnection object.

[Visual Basic] 
Public Shared Function CreateCustomerAdapter(conn As OracleConnection) As OracleDataAdapter 
  
  Dim da As OracleDataAdapter = New OracleDataAdapter()
  Dim cmd As OracleCommand
  Dim parm As OracleParameter

  ' Create the SelectCommand.

  cmd = New OracleCommand("SELECT * FROM Dept " & _
                       "WHERE DName = :pDName AND Loc = :pLoc", conn)

  cmd.Parameters.Add("pDName", OracleType.NVarChar, 14)
  cmd.Parameters.Add("pLoc", OracleType.NVarChar, 13)

  da.SelectCommand = cmd

  ' Create the DeleteCommand.

  cmd = New OracleCommand("DELETE FROM Dept WHERE DeptNo = :pDeptNo", conn)

  parm = cmd.Parameters.Add("pDeptNo", OracleType.Number, 2, "DeptNo")
  parm.SourceVersion = DataRowVersion.Original

  da.DeleteCommand = cmd

  Return da
End Function

[C#] 
public static OracleDataAdapter CreateCustomerAdapter(OracleConnection conn)
{
  OracleDataAdapter da = new OracleDataAdapter();
  OracleCommand cmd;
  OracleParameter parm;

  // Create the SelectCommand.

  cmd = new OracleCommand("SELECT * FROM Dept " +
                       "WHERE DName = :pDName AND Loc = :pLoc", conn);

  cmd.Parameters.Add("pDName", OracleType.NVarChar, 14);
  cmd.Parameters.Add("pLoc", OracleType.NVarChar, 13);

  da.SelectCommand = cmd;

  // Create the DeleteCommand.

  cmd = new OracleCommand("DELETE FROM Dept WHERE DeptNo = :pDeptNo", conn);

  parm = cmd.Parameters.Add("pDeptNo", OracleType.Number, 2, "DeptNo");
  parm.SourceVersion = DataRowVersion.Original;

  da.DeleteCommand = cmd;

  return da;
}

[C++] 
public:
static OracleDataAdapter* CreateCustomerAdapter(OracleConnection* conn)
{
  OracleDataAdapter* da = new OracleDataAdapter();
  OracleCommand* cmd;
  OracleParameter* parm;

  // Create the SelectCommand.

  cmd = new OracleCommand(S"SELECT * FROM Dept " 
                          S"WHERE DName = :pDName AND Loc = :pLoc", conn);

  cmd->Parameters->Add(S"pDName", OracleType::NVarChar, 14);
  cmd->Parameters->Add(S"pLoc", OracleType::NVarChar, 13);

  da->SelectCommand = cmd;

  // Create the DeleteCommand.

  cmd = new OracleCommand(S"DELETE FROM Dept WHERE DeptNo = :pDeptNo", conn);

  parm = cmd->Parameters->Add(S"pDeptNo", OracleType::Number, 2, S"DeptNo");
  parm->SourceVersion = DataRowVersion::Original;

  da->DeleteCommand = cmd;

  return da;
}

[JScript] No example is available for JScript. To view a Visual Basic, C#, or C++ example, click the Language Filter button Language Filter in the upper-left corner of the page.

Requirements

Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

.NET Framework Security: 

See Also

OracleDataAdapter Class | OracleDataAdapter Members | System.Data.OracleClient Namespace | InsertCommand | SelectCommand | UpdateCommand

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