protected void btnApplyCustomFilter_Click(object sender, EventArgs e)
{
// ExStart:SetCustomFilter
// Access active worksheet
var sheet = GridWeb1.WorkSheets[this.GridWeb1.ActiveSheetIndex];
// Enable GridWeb's custom-filter.
sheet.AddCustomFilter(1, "CELL0=\"1\"");
sheet.RefreshFilter();
// ExEnd:SetCustomFilter
}
}