要想让那个OnFilterPopulating起作用必须设定两个属性的值:Browser="Xml"和Browser="Xml";
aspx页面: 1> <igtbl:UltraWebGrid Browser="Xml">
2> <DisplayLayout Browser="Xml">
或者C#后台:
protected void UltraWebGrid1_InitializeLayout(object sender, LayoutEventArgs e)
{
this.UltraWebGrid1.Browser = BrowserLevel.Xml;
this.UltraWebGrid1.DisplayLayout.LoadOnDemand = LoadOnDemand.Xml;
}