DB2®Connection.Chaining Property

Syntax

[Visual Basic]
Public ReadOnly Property Chaining As Boolean
[C#]
public bool Chaining {get;}
[C++]
public: __property bool get_Chaining();
[JScript]
public function get Chaining() : Boolean;

Property value

True if chaining is active. Chaining is active for a DB2Connection object if the application has called that object's BeginChain method, but has not yet called its EndChain method.

False if chaining is not active.

Example

[Visual Basic, C#] The following example uses chaining to insert 10000 rows into the STAFF table.

[Visual Basic]
Dim con As DB2Connection = new DB2Connection("DATABASE=sample;")
Dim cmd As DB2Command = con.CreateCommand()
con.Open()

' Initialize an insert statement using parameter markers
cmd.CommandText = "INSERT INTO STAFF(ID) VALUES( ? )"

' Add a parameter
Dim p1 As DB2Parameter = cmd.Parameters.Add("@ID", DB2Type.Integer )

' Start the chain
con.BeginChain()

Try
   ' Loop to add 10000 rows
   Dim I As Int32
   For I = 1 To 10000
      ' Set the parameter value
      p1.Value = I

      ' Execute the command. 
      ' Since chaining is active, this statement is now added
      '   to the chain
      cmd.ExecuteNonQuery()
   Next I

   ' Execute the chain
   con.EndChain()
Catch db2Ex As DB2Exception
   Dim db2Error As DB2Error
   
   ' Loop through all the errors
   For Each db2Error in db2Ex.Errors
      Console.WriteLine("SQLSTATE =" & db2Error.SQLState )
      Console.WriteLine("NativeErr=" & db2Error.NativeError )
      Console.WriteLine("RowNumber=" & db2Error.RowNumber )
      Console.WriteLine( db2Error.Message )
   Next DB2Error
Finally
   ' Explicitly turn chaining off in case it is still on
   If (con.Chaining) Then
      con.EndChain()
   End If 
End Try

con.Close()[C#]
DB2Connection con = new DB2Connection("DATABASE=sample;");
DB2Command cmd = con.CreateCommand();
con.Open();      

// Initialize an insert statement using parameter markers
cmd.CommandText = "INSERT INTO STAFF(ID) VALUES( ? )";

// Add a parameter
DB2Parameter p1 = cmd.Parameters.Add("@ID", DB2Type.Integer );

// Start the chain
con.BeginChain();

try
{
   // Loop to add 10000 rows
   for( Int32 i = 1; i <= 10000; i++ )
   {
      // Set the parameter value
      p1.Value = i;

      // Execute the command. 
      // Since chaining is active, this statement is now added
      //   to the chain
      cmd.ExecuteNonQuery();
   }

   // Execute the chain
   con.EndChain();
}
catch( DB2Exception db2Ex )
{
   // Loop through all the errors
   foreach( DB2Error db2Error in db2Ex.Errors )
   {            
      Console.WriteLine("SQLSTATE =" + db2Error.SQLState );
      Console.WriteLine("NativeErr=" + db2Error.NativeError );
      Console.WriteLine("RowNumber=" + db2Error.RowNumber );
      Console.WriteLine( db2Error.Message );
   }                  
}
finally
{
   // Explicitly turn chaining off in case it is still on
   if( con.Chaining )
   {
      con.EndChain();
   }
}

con.Close();