直接上代码吧：仿照DEMO不解释
前台：
<LoadMask ShowMask="true" /> <Plugins> <ext:GridFilters runat="server" ID="GridFilters1" Local="true"> <Filters> <ext:StringFilter DataIndex="材料类型" /> <ext:StringFilter DataIndex="供应商" /> </Filters> </ext:GridFilters> </Plugins> <ext:PagingToolbar ID="PagingToolbar1" runat="server" PageSize="120" StoreID="Store1" > <Items> <ext:ToolbarSeparator ID="ToolbarSeparator1" runat="server" /> <ext:Button ID="Button1" runat="server" Text=""> <DirectEvents> <Click OnEvent="SetFilter" /> </DirectEvents> </ext:Button> </Items> </ext:PagingToolbar>后台方法：
protected void SetFilter(object sender, DirectEventArgs e) { StringFilter sf = (StringFilter)GridFilters1.Filters[1]; //sf.SetValue(""); sf.SetActive(true); }上图: