[CLOSED] add a directevent when select the DropDownField ?

[hdsoso]

when user click the column , i want to init treepanel in code behind. but how to add the direct event?

 <ext:Column runat="server" DataIndex="pid" Text="父类别" Flex="1">
                                <Renderer Fn="r_p_product_type" />
                                <Editor>
                                    <ext:DropDownField runat="server" Mode="ValueText">
                                        <Component>
                                            <ext:TreePanel runat="server" ID="tp_product_type1"></ext:TreePanel>
                                        </Component> 
                                    </ext:DropDownField> 
                                </Editor> 
                            </ext:Column>

 protected void SelectPtype(object sender, DirectEventArgs e)
        {
            X.Msg.Alert("sss","ssddd").Show();
            //  here to init treepanel tp_product_type1
        }

[Baidaly]

Hello!

I'd suggest to use JS handler with DirectMethod like in this example: https://examples2.ext.net/#/TreePane...Direct_Method/

[hdsoso]

Hello!

I'd suggest to use JS handler with DirectMethod like in this example: https://examples2.ext.net/#/TreePane...Direct_Method/

i mean which direct event i should use when user click the column rather than how to load treepanel's items.

[Baidaly]

There are two options.

1) Listen Expand event:

<Editor>
	<ext:DropDownField ID="DropDownField2" runat="server" Mode="ValueText">
		<DirectEvents>
			<Expand OnEvent="SelectPtype" />
		</DirectEvents>
		<Component>
			<ext:TreePanel runat="server" ID="TreePanel1"></ext:TreePanel>
		</Component>
	</ext:DropDownField>
</Editor>

2) Listen BeforeEdit of CellEditing plugin:

<ext:CellEditing runat="server">
    <DirectEvents>
        <BeforeEdit OnEvent="SelectPtype" Before="
            return el.activeColumn.dataIndex == 'pid;
            ">
        </BeforeEdit>
    </DirectEvents>
</ext:CellEditing>