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OracleDataAdapter.UpdateCommand Property

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

Namespace: System.Data.OracleClient
Assembly: System.Data.OracleClient (in system.data.oracleclient.dll)

public OracleCommand UpdateCommand { get; set; }
/** @property */
public OracleCommand get_UpdateCommand ()

/** @property */
public void set_UpdateCommand (OracleCommand value)

public function get UpdateCommand () : OracleCommand

public function set UpdateCommand (value : OracleCommand)

Not applicable.

Property Value

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

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

During an update operation, if InsertCommand is not set and primary key information is present in the DataSet, you can use the OracleCommandBuilder class to automatically generate InsertCommand, 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 Generating Commands.

NoteNote:

If execution of this command returns rows, these rows may be merged with the DataSet depending upon how you set the UpdatedRowSource property of the OracleCommand object.

When you update a column with the LONG RAW data type, an exception is thrown when you enter a value of NULL in the column. The Oracle LONG RAW data type is a deprecated type in Oracle version 8.0. To avoid this error, use the BLOB data type instead of LONG RAW.

The following example creates an OracleDataAdapter and sets the SelectCommand and UpdateCommand 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 UpdateCommand.

  cmd = New OracleCommand("UPDATE Dept SET DeptNo = pDeptNo, DName = pDName " & _
                       "WHERE DeptNo = poldDeptNo", conn)

  cmd.Parameters.Add("pDeptNo", OracleType.Number, 2, "DeptNo")
  cmd.Parameters.Add("pDName", OracleType.NVarChar, 14, "DName")

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

  da.UpdateCommand = 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 UpdateCommand.

  cmd = new OracleCommand("UPDATE Dept SET DeptNo = pDeptNo, DName = pDName " +
                       "WHERE DeptNo = poldDeptNo", conn);

  cmd.Parameters.Add("pDeptNo", OracleType.Number, 2, "DeptNo");
  cmd.Parameters.Add("pDName", OracleType.NVarChar, 14, "DName");

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

  da.UpdateCommand = cmd;

  return da;
}

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1

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