/// <summary>
/// Extends BeginInvoke so that when a state object is not needed, null does not need to be passed.
/// <example>
/// datagridviewrowerrortextneededeventhandler.BeginInvoke(sender, e, callback);
/// </example>
/// </summary>
public static IAsyncResult BeginInvoke(this DataGridViewRowErrorTextNeededEventHandler datagridviewrowerrortextneededeventhandler, Object sender, DataGridViewRowErrorTextNeededEventArgs e, AsyncCallback callback)
{
if(datagridviewrowerrortextneededeventhandler == null) throw new ArgumentNullException("datagridviewrowerrortextneededeventhandler");
return datagridviewrowerrortextneededeventhandler.BeginInvoke(sender, e, callback, null);
}
protected virtual void OnRowErrorTextNeeded (DataGridViewRowErrorTextNeededEventArgs e)
{
DataGridViewRowErrorTextNeededEventHandler eh = (DataGridViewRowErrorTextNeededEventHandler)(Events [RowErrorTextNeededEvent]);
if (eh != null) eh (this, e);
}
internal string OnRowErrorTextNeeded(int rowIndex, string errorText)
{
Debug.Assert(rowIndex >= 0);
DataGridViewRowErrorTextNeededEventArgs dgvretne = new DataGridViewRowErrorTextNeededEventArgs(rowIndex, errorText);
OnRowErrorTextNeeded(dgvretne);
return dgvretne.ErrorText;
}
/// <include file='doc\DataGridView.uex' path='docs/doc[@for="DataGridView.OnRowErrorTextNeeded"]/*' />
protected virtual void OnRowErrorTextNeeded(DataGridViewRowErrorTextNeededEventArgs e)
{
DataGridViewRowErrorTextNeededEventHandler eh = this.Events[EVENT_DATAGRIDVIEWROWERRORTEXTNEEDED] as DataGridViewRowErrorTextNeededEventHandler;
if (eh != null && !this.dataGridViewOper[DATAGRIDVIEWOPER_inDispose] && !this.IsDisposed)
{
eh(this, e);
}
}
protected virtual void OnRowErrorTextNeeded(DataGridViewRowErrorTextNeededEventArgs e);
