TextField KeyUp事件

<ext:Store runat="server" ID="RosesStore">
        <Proxy>
            <ext:HttpProxy Method="POST" Url="WebService/GetRoses.asmx/GetRosesByRoseId" />
        </Proxy>
        <Reader>
            <ext:XmlReader Record="Roses">
                <Fields>
                    <ext:RecordField Name="RoseId" Type="Int">
                    </ext:RecordField>
                    <ext:RecordField Name="RoseName" Type="String">
                    </ext:RecordField>
                    <ext:RecordField Name="Des" Type="String">
                    </ext:RecordField>
                </Fields>
            </ext:XmlReader>
        </Reader>
        <BaseParams>
            <ext:Parameter Name="roseId" Value="#{txtFullname}.getValue()" Mode="Raw" />
        </BaseParams>
    </ext:Store>

<ext:FormLayout ID="FormLayout1" runat="server">
                <ext:Anchor Horizontal="100%">
                    <ext:TextField ID="txtFullname" EnableKeyEvents="true" runat="server" FieldLabel="用户名">
                        <Listeners>
                            <KeyUp Handler="#{RosesStore}.load();" />
                        </Listeners>
                    </ext:TextField>
                </ext:Anchor>
                <ext:Anchor Horizontal="100%">
                    <ext:ComboBox ID="cmbRoses" runat="server" StoreID="RosesStore" Width="250" FieldLabel="角色"
                        Editable="false" DisplayField="RoseName" ValueField="RoseId" TypeAhead="true"
                        Mode="Local" ForceSelection="true" TriggerAction="All" EmptyText="选择相应角色..."
                        ItemSelector="div.list-item" SelectOnFocus="true">
                        <Template ID="Template1" runat="server">                                               
                           <tpl for=".">
                                <div class="list-item">
                                     <h3>{RoseName}</h3>
                                      {Des}
                                </div>
                           </tpl>
                        </Template>
                    </ext:ComboBox>
                </ext:Anchor>
            </ext:FormLayout>