关于ext.net GridPanel分页问题

Question

 <ext:PagingToolbar ID="PagingToolbar1" runat="server" PageSize="20"  />的分页事件怎么样获取

Answer 1

bbar: new Ext.PagingToolbar({
                pageSize: 15,//每页显示的记录值
                store: store,
                displayInfo: true,
                displayMsg: '总记录数 {0} - {1} of {2}',
                emptyMsg: "没有记录"
            })

Answer 2

前台
<ext:GridPanel ID="gp_CollectAlarm" runat="server" AutoHeight="true" Border="false">
                    <Store>
                        <ext:Store runat="server" ID="st_CollectAlarm" OnRefreshData="BandWarehouseAreaInfo"
                            AutoLoad="true">
                            <Reader>
                                <ext:JsonReader IDProperty="ID">
                                    <Fields>
                                        <ext:RecordField Name="ID" />
                                        <ext:RecordField Name="AlarmLv" />
                                                                            </Fields>
                                </ext:JsonReader>
                            </Reader>
                            <Proxy>
                                <ext:PageProxy />
                            </Proxy>
                            <BaseParams>
                                <ext:Parameter Name="start" Value="0" />
                                <ext:Parameter Name="limit" Value="20" />
                            </BaseParams>
                        </ext:Store>
                    </Store>
                    <TopBar>
                        <ext:Toolbar ID="Toolbar1" runat="server">
                            <Items>
                                <ext:Label ID="Label1" runat="server" Text="" Icon="ApplicationViewList" />
                                <ext:TextField ID="txtSelect" runat="server" Width="230" />
                                <ext:Button ID="Button7" runat="server" Text="查找" Icon="Find" StandOut="true">
                                    <DirectEvents>
                                        <Click>
                                            <EventMask ShowMask="true" Msg="正在搜索..." />
                                        </Click>
                                    </DirectEvents>
                                    <Listeners>
                                        <Click Handler="#{gp_CollectAlarm}.reload();" />
                                    </Listeners>
                                </ext:Button>
                                <ext:Button ID="Button1" runat="server" Text="条件查询" StandOut="true">
                                    <Listeners>
                                        <Click Handler="#{FormPanel1}.getForm().reset();#{Window1}.show();" />
                                    </Listeners>
                                </ext:Button>
                                <ext:Button ID="BtnExport" runat="server" Text="导出" AutoPostBack="true" OnClick="ToExcel"
                                        StandOut="true" Icon="PageExcel">
                                    <Listeners>
                                        <Click Fn="saveData" />
                                    </Listeners>
                                </ext:Button>
                            </Items>
                        </ext:Toolbar>
                    </TopBar>
                    <ColumnModel>
                        <Columns>
                            <ext:RowNumbererColumn Width="20" />
                            <ext:Column Header="超限记录ID" Hidden="true" DataIndex="ID" />
                                                    </Columns>
                    </ColumnModel>
                    <LoadMask ShowMask="true" Msg="正在加载..." />
                    <SelectionModel>
                        <ext:CheckboxSelectionModel ID="CheckboxSelectionModel1" runat="server" />
                    </SelectionModel>
                    <BottomBar>
                        <ext:PagingToolbar ID="PagingToolBar1" StoreID="st_CollectAlarm" PageSize="20" runat="server" />
                    </BottomBar>
                </ext:GridPanel>
后台：
/// <summary>
    /// 绑定设备信息
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void BandWarehouseAreaInfo(object sender, StoreRefreshDataEventArgs e)
    {
        string strfield = "";
        string innStr = "";
        string str = " 1=1 ";         e.Total = WebUtils.GetInnerTableCount("Date_CollectAlarm", innStr, str);
        DataTable dt = WebUtils.FindByPageSQL(strfield, "Date_CollectAlarm", innStr, e.Start.ToString(), e.Limit.ToString(), str);
        st_CollectAlarm.DataSource = dt;
        st_CollectAlarm.DataBind();
        Window1.Hidden = true;
    }
e.Start.ToString(), 开始分页数，一般为0
 e.Limit.ToString(),每页显示最大条数