protected override void SetRowUpdatingHandler(DbDataAdapter adapter)
{
if (!(adapter is SqlDataAdapter))
{
throw new InvalidOperationException("Adapter needs to be a SqlDataAdapter");
}
rowUpdatingHandler = new SqlRowUpdatingEventHandler(RowUpdatingHandler);
((SqlDataAdapter)adapter).RowUpdating += rowUpdatingHandler;
}
/// <summary>
/// Extends BeginInvoke so that when a state object is not needed, null does not need to be passed.
/// <example>
/// sqlrowupdatingeventhandler.BeginInvoke(sender, e, callback);
/// </example>
/// </summary>
public static IAsyncResult BeginInvoke(this SqlRowUpdatingEventHandler sqlrowupdatingeventhandler, Object sender, SqlRowUpdatingEventArgs e, AsyncCallback callback)
{
if (sqlrowupdatingeventhandler == null)
{
throw new ArgumentNullException("sqlrowupdatingeventhandler");
}
return(sqlrowupdatingeventhandler.BeginInvoke(sender, e, callback, null));
}
/// <include file='doc\SqlDataAdapter.uex' path='docs/doc[@for="SqlDataAdapter.OnRowUpdating1"]/*' />
override protected void OnRowUpdating(RowUpdatingEventArgs value)
{
SqlRowUpdatingEventHandler handler = (SqlRowUpdatingEventHandler)Events[ADP.EventRowUpdating];
if ((null != handler) && (value is SqlRowUpdatingEventArgs))
{
handler(this, (SqlRowUpdatingEventArgs)value);
}
}
protected override void OnRowUpdating(RowUpdatingEventArgs value)
{
SqlRowUpdatingEventHandler handler = (SqlRowUpdatingEventHandler)base.Events[EventRowUpdating];
if ((handler != null) && (value is SqlRowUpdatingEventArgs))
{
handler(this, (SqlRowUpdatingEventArgs)value);
}
base.OnRowUpdating(value);
}
private void ClearHandlers()
{
if (null != this.adohandler)
{
((OleDbDataAdapter)this.adapter).RowUpdating -= this.adohandler;
this.adohandler = null;
}
else if (null != this.sqlhandler)
{
((SqlDataAdapter)this.adapter).RowUpdating -= this.sqlhandler;
this.sqlhandler = null;
}
else if (null != this.odbchandler)
{
((OdbcDataAdapter)this.adapter).RowUpdating -= this.odbchandler;
this.odbchandler = null;
}
}
