SADataAdapter: Delete Rows Using Update

C# SADataAdapter Delete Example

The example adds two new rows to the Departments table and then fetches this table into a DataTable using the SelectCommand property and the Fill method of the SADataAdapter. It then deletes some rows from the DataTable and updates the Departments table from the DataTable using the DeleteCommand property and the Update method of the SADataAdapter.

SAConnection conn = new SAConnection( "Data Source=Sybase IQ Demo" );
conn.Open();
SACommand prepCmd = new SACommand("", conn);
prepCmd.CommandText =
    "DELETE FROM Departments WHERE DepartmentID >= 600";
prepCmd.ExecuteNonQuery();
prepCmd.CommandText =
    "INSERT INTO Departments VALUES (600, 'Eastern Sales', 902)";
prepCmd.ExecuteNonQuery();
prepCmd.CommandText =
    "INSERT INTO Departments VALUES (700, 'Western Sales', 902)";
prepCmd.ExecuteNonQuery();

SADataAdapter da = new SADataAdapter();
da.MissingMappingAction = MissingMappingAction.Passthrough;
da.MissingSchemaAction = MissingSchemaAction.AddWithKey;
da.SelectCommand = new SACommand(
    "SELECT * FROM Departments", conn);
da.DeleteCommand = new SACommand(
    "DELETE FROM Departments WHERE DepartmentID = ?",
    conn);
da.DeleteCommand.UpdatedRowSource = UpdateRowSource.None;

SAParameter parm = new SAParameter();
parm.SADbType = SADbType.Integer;
parm.SourceColumn = "DepartmentID";
parm.SourceVersion = DataRowVersion.Original;
da.DeleteCommand.Parameters.Add(parm);

DataTable dataTable = new DataTable("Departments");
int rowCount = da.Fill(dataTable);

foreach (DataRow row in dataTable.Rows)
{
    if (Int32.Parse(row[0].ToString()) > 500)
    {
        row.Delete();
    }
}
rowCount = da.Update(dataTable);

dataTable.Clear();
rowCount = da.Fill(dataTable);
conn.Close();
dataGridView1.DataSource = dataTable;