DeleteCommand Property (SQLiteDataTable)

In This Topic

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

Syntax

Visual Basic
C#

'Declaration
 
Public Shadows Property DeleteCommand As SQLiteCommand

public new SQLiteCommand DeleteCommand {get; set;}

Property Value

A SQLiteCommand 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 SQLiteDataTable. 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 SQLiteDataTable. This sample shows how to modify and display data using SQLiteDataTable.

csharp

public void UseDataTable(SQLiteConnection sqConnection)
{
  SQLiteDataTable myDataTable = new SQLiteDataTable("SELECT * FROM Dept", sqConnection);
  try
  {
    myDataTable.Active = true;
    myDataTable.Rows[1].Delete();
    myDataTable.DeleteCommand = new SQLiteCommand("DELETE FROM Emp WHERE DeptNo = :DeptNo;DELETE FROM Dept WHERE DeptNo = :DeptNo", sqConnection);
    myDataTable.DeleteCommand.Parameters.Add("DeptNo", SQLiteType.Int32, 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;
  }
}
public void UseDataTable(SQLiteConnection sqConnection)
{
        SQLiteDataTable myDataTable = new SQLiteDataTable("SELECT * FROM Dept", sqConnection);
        try
        {
                myDataTable.Active = true;
                myDataTable.Rows[1].Delete();
                myDataTable.DeleteCommand = new SQLiteCommand("DELETE FROM Emp WHERE DeptNo = :DeptNo;DELETE FROM Dept WHERE DeptNo = :DeptNo", sqConnection);
                myDataTable.DeleteCommand.Parameters.Add("DeptNo", SQLiteType.Int32, 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 sqConnection As SQLiteConnection)
  Dim myDataTable As SQLiteDataTable = New SQLiteDataTable("SELECT * FROM Dept", sqConnection)
  Try
    myDataTable.Active = True
    myDataTable.Rows(2).Delete()
    myDataTable.DeleteCommand = New SQLiteCommand("DELETE FROM Emp WHERE DeptNo = :DeptNo;DELETE FROM Dept WHERE DeptNo = :DeptNo", sqConnection)
    myDataTable.DeleteCommand.Parameters.Add("DeptNo", SQLiteType.Int32, 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
Public Sub UseDataTable(ByVal sqConnection As SQLiteConnection)
        Dim myDataTable As SQLiteDataTable = New SQLiteDataTable("SELECT * FROM Dept", sqConnection)
        Try
                myDataTable.Active = True
                myDataTable.Rows(2).Delete()
                myDataTable.DeleteCommand = New SQLiteCommand("DELETE FROM Emp WHERE DeptNo = :DeptNo;DELETE FROM Dept WHERE DeptNo = :DeptNo", sqConnection)
                myDataTable.DeleteCommand.Parameters.Add("DeptNo", SQLiteType.Int32, 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

Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

SQLiteDataTable Class
SQLiteDataTable Members
InsertCommand Property
SelectCommand Property
UpdateCommand Property

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