OracleDataAdapter.SelectCommand Property

Reference

Definition

Namespace:: System.Data.OracleClient

Assembly:: System.Data.OracleClient.dll

Important

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

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

public System.Data.OracleClient.OracleCommand SelectCommand { get; set; }

member this.SelectCommand : System.Data.OracleClient.OracleCommand with get, set

Public Property SelectCommand As OracleCommand

Property Value

OracleCommand

An OracleCommand that is used during a fill operation to select records from database for placement in the DataSet.

Examples

The following example creates an OracleDataAdapter and sets the SelectCommand and InsertCommand properties. It assumes you have already created an OracleConnection object.

Public Shared Function CreateCustomerAdapter(conn As OracleConnection) As OracleDataAdapter   

  Dim da As OracleDataAdapter = New OracleDataAdapter()  
  Dim cmd As OracleCommand  

  ' 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 InsertCommand.  

  cmd = New OracleCommand("INSERT INTO Dept (DeptNo, DName) " & _  
                       "VALUES (pDeptNo, pDName)", conn)  

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

  da.InsertCommand = cmd  

  Return da  
End Function

public static OracleDataAdapter CreateCustomerAdapter(OracleConnection conn)  
{  
  OracleDataAdapter da = new OracleDataAdapter();  
  OracleCommand cmd;  

  // 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 InsertCommand.  

  cmd = new OracleCommand("INSERT INTO Dept (DeptNo, DName) " +  
                       "VALUES (:pDeptNo, :pDName)", conn);  

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

  da.InsertCommand = cmd;  

  return da;  
}

Remarks

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

If SelectCommand does not return any rows, no tables are added to the DataSet, and no exception is raised.

Applies to

Продукт	Версии
.NET Framework	1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1

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