//bs - BindingDataSource ; dx - gridControl(gridView)

private void Fill()
{
_bsTmcs.DataSource = // таблица Childrens (Id int, Name nvarchar(20), Age int) 
dxTmcs.DataSource = _bsTmcs;
}

private void txtNameFilter_TextChanged(object sender, EventArgs e)
{
if (txtNameFilter != "")
  _bsTmcs.Filter = string.Format("Name like '{0}%'", txtNameFilter.Text.Trim().ToLower());
else
 _bsTmcs.Filter = String.Empty;
  
dxTmcs.DataSource = null;
dxTmcs.DataSource = _bsTmcs;
}

private void Fill()
{
_bsTmcs.DataSource = // таблица Childrens (Id int, Name nvarchar(20), Age int) 
dxTmcs.DataSource = _bsTmcs;
}