DeleteCommand Property (DB2DataTable)

In This Topic

Gets or sets a DB2 statement to delete records from the data set.

Syntax

Visual Basic
C#

'Declaration
 
Public Shadows Property DeleteCommand As DB2Command

public new DB2Command DeleteCommand {get; set;}

Property Value

A DB2Command used during an update operation to delete records in the data source that correspond to deleted rows in the System.Data.DataSet.

Remarks

Typically you do not need to use DeleteCommand when working with DB2DataTable. All simple update operations are performed automatically using embedded CommandBuilder. DeleteCommand enables you to perform specific operations like shown in the sample below.

DeleteCommand uses its own Connection if it is created. Otherwise DeleteCommand uses Connection.

Example

This sample shows how to modify and display data using DB2DataTable.

csharp

public void UseDataTable(DB2Connection db2Connection)
{
  DB2DataTable myDataTable = new DB2DataTable("SELECT * FROM Dept", db2Connection);
  try
  {
    myDataTable.Active = true;
    myDataTable.Rows[1].Delete();
    myDataTable.DeleteCommand = new DB2Command("DELETE FROM Emp WHERE DeptNo = :DeptNo;DELETE FROM Dept WHERE DeptNo = :DeptNo", db2Connection);
    myDataTable.DeleteCommand.Parameters.Add("DeptNo", DB2Type.Int, 0, "DeptNo").SourceVersion = DataRowVersion.Original;
    myDataTable.Update();

    foreach(DataRow myRow in myDataTable.Rows)
    {
      foreach(DataColumn myCol in myDataTable.Columns)
      {
        Console.Write(myRow[myCol]+"\t");
      }
      Console.WriteLine();
    }
  }
  finally
  {
    myDataTable.Active = false;
  }
}

Visual Basic

Public Sub UseDataTable(ByVal db2Connection As DB2Connection)
  Dim myDataTable As DB2DataTable = New DB2DataTable("SELECT * FROM Dept", db2Connection)
  Try
    myDataTable.Active = True
    myDataTable.Rows(2).Delete()
    myDataTable.DeleteCommand = New DB2Command("DELETE FROM Emp WHERE DeptNo = :DeptNo;DELETE FROM Dept WHERE DeptNo = :DeptNo", db2Connection)
    myDataTable.DeleteCommand.Parameters.Add("DeptNo", DB2Type.Int, 0, "DeptNo").SourceVersion = DataRowVersion.Original
    myDataTable.Update()

    Dim myRow As DataRow
    Dim myCol As DataColumn
    For Each myRow In myDataTable.Rows
      For Each myCol In myDataTable.Columns
        Console.Write(myRow(myCol) & Chr(9))
      Next myCol
      Console.WriteLine()
    Next myRow
  Finally
    myDataTable.Active = False
  End Try
End Sub

Reference

DB2DataTable Class
DB2DataTable Members
InsertCommand Property
SelectCommand Property
UpdateCommand Property

Send Feedback