Update Panel is not updating using .Update() method

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ASP.NET

asynchronous

UpdatePanel

Hi,

I have two update panels. The first update panel has drop down list and the other has repeater control.
On SelectionIndexChanged event of dropdownlist I am binding repeater, but the updation isinconsistent.


Using upAgencyRatings.Update(); method in ddlCompany_SelectionIndexChanged event.

<asp:UpdatePanel runat="server" ID="upCompany" UpdateMode="Conditional">
 <ContentTemplate>
 <asp:DropDownList ID="ddlCompany" runat="server" CssClass="dropdown" Width="260px"
   ToolTip="Company" AutoPostBack="true"   OnSelectedIndexChanged="ddlCompany_SelectedIndexChanged">
</asp:DropDownList>
<ajaxControls:ListSearchExtender ID="lseCompanySearcher" QueryPattern="contains"
 runat="server" TargetControlID="ddlCompany" PromptCssClass="listSearchPrompt">
</ajaxControls:ListSearchExtender>
<asp:RequiredFieldValidator ID="rfvCompanyID" runat="server" ControlToValidate="ddlCompany"
ErrorMessage="Company is required." Display="None" SetFocusOnError="true"></asp:RequiredFieldValidator>
</ContentTemplate>
</asp:UpdatePanel>

<asp:UpdatePanel ID="upAgencyRatings" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:Repeater ID="rptrAgency" runat="server" OnItemCommand="rptrAgency_ItemCommand"
OnItemDataBound="rptrAgency_ItemDataBound">
</asp:Repeater>