why is it that having a web drop down in this instance makes the page crawl? Button clicks take 5 or more seconds. They get stuck. If I revert back to a regular ASP DDL, it runs like a champ.
<td style="width:50%; text-align:right">
<ig:WebDropDown runat="server" ID="ddlAddPM" TextField="UserMachineName" Width="250px" DisplayMode="DropDownList" DropDownContainerMaxHeight="150px" EnableDropDownAsChild="false" ValueField="Id" >
</ig:WebDropDown>
<asp:RequiredFieldValidator runat="server" ControlToValidate="ddlAddPM" Display="None" ErrorMessage="Select a user from the Drop Down List" ValidationGroup="PM" />
</td>
<td style="width:50%; text-align:left">
<asp:Button ID="btnAddPM" runat="server" Text="Assign PM Role" OnClick="btnAddPM_Click" ValidationGroup="PM" />
<asp:ValidationSummary runat="server" ValidationGroup="PM" DisplayMode="List" ShowMessageBox="true" ShowSummary="false" />
<asp:DropDownList runat="server" ID="ddlAddPM" DataTextField="UserMachineName" Width="250px" DataValueField="Id" >
</asp:DropDownList>
Hi,
Thanks for your feedback. How do you data-bind the dropdowns ? More importantly, how many items do you have in the dropdown? If you have thousands of items, i would indeed expect a performance degradation - which can be fixed in several ways - using paging, load on demand, or EnableAutoFiltering=Server, which will set lazy loading of items and no objects will be created at once. But this is only related to the dropdown performance, it shouldn't affect page performance. That's because all client-side logic and events listen and are applied to the dropdown elements only, not to any other page elements.
Thanks,
Angel
I have the problem to use webdropdown,
I found webdropdown_selectedchanged event on events queue, it fires utile another bostback. even I set attribute postback= true for select change. I really want to know why??
Thnaks.
Martin