DevExpress ASPxListBox 使用方法 积累

1、ASPxListBox 数据绑定 Item 添加 删除

DevExpress 官方帮助：

The ASPxListBox control allows you to modify the ASPxListEdit.Items collection on callbacks only (e.g. add and remove items, populate the controls with new data from a data source, etc.).

It is not possible, for example, to modify a column collection, change items selection, or change SelectionMode on callbacks. To perform these actions on the client side, you can wrap the control with theASPxCallbackPanel control and process a required scenario on a callback to the panel.

添加删除Item只能在callback事件中处理，客户端调用语句：

                                        <dx:ASPxButton ID="btnDeleteUpload" runat="server" Text="删除已有" AutoPostBack="false"
                                            Style="margin: 16px auto;">
                                            <ClientSideEvents Click="function(s, e) { listAttachment.PerformCallback(listAttachment.GetSelectedIndex());}" />
                                        </dx:ASPxButton>
PerformCallback的参数可以传递要删除的ItemIndex。

服务器端：protected void listAttachment_Callback(object sender, DevExpress.Web.ASPxClasses.CallbackEventArgsBase e) 中处理数据绑定或者删除Item ，利用e.Parameter的值来判断。