当 ASPxPageControl 选项卡页位于两个 ASPxPageControl 标签页中时，我无法访问该组件

I can't access ASPxComboBox component when it is in both ASPxPageControl tab pages

本文关键字：ASPxPageControl 访问 组件 选项 于两个 标签      更新时间：2023-09-26

当ASPxPageControl两个标签页中时，我无法访问ASPxComboBox组件。所以我用字符串将这个函数添加到客户端事件中。格式：

function(s, e) {{ 
    if (window['{1}']) {{ 
        {0}.SetSelectedItem(
            {0}.FindItemByText(
                {2}.GetText()
            )
        ); 
        {0}.Focus(); 
        {3}.PerformCallback(
            {0}.GetSelectedItem().value
        ); 
    }} 
}}

首先在一个标签页然后在另一个页面上触发此功能，我得到错误：

Microsoft JScript runtime error: Unable to get value of the property 'SetSelectedItem': object is null or undefined

为什么会这样？切换选项卡后，我可以以某种方式访问该组合框吗？
顺便说一句，ASPxPopupControl apears在两个选项卡上打开。

更多背景：

0 is ASPxClientControl.GetControlCollection().Get('<%=ASPxComboBox_Views.ClientID%>'), (compiles to ctl00_ctl00_ASPxSplitter_Main_ContentPlaceHolderMain_ContentProgramMain_ASPxRoundPanelMain_ASPxPageControl_Main_ASPxCallbackPanel_Redagavimas_ASPxCallbackPanel_RedagavimasGrid_GridLayout_Redagavimas_ASPxPopupControl_Layout_ASPxCallbackPanel_Views_ASPxComboBox_Views )
1 is ASPxClientControl.GetControlCollection().Get('<%=ASPxComboBox_Views.ClientInstanceName%>'), (compiles to cbViews )
2 is ASPxClientControl.GetControlCollection().Get('<%=GetClientStr(ASPxHyperLink_Desc.ClientID%>'), (compiles to ctl00_ctl00_ASPxSplitter_Main_ContentPlaceHolderMain_ContentProgramMain_ASPxRoundPanelMain_ASPxPageControl_Main_ASPxCallbackPanel_Redagavimas_ASPxCallbackPanel_RedagavimasGrid_GridLayout_Redagavimas_ASPxHyperLink_Desc )
3 is ASPxClientControl.GetControlCollection().Get('<%=ASPxCallbackPanel_Menu.ClientID%>'), (compiles to ctl00_ctl00_ASPxSplitter_Main_ContentPlaceHolderMain_ContentProgramMain_ASPxRoundPanelMain_ASPxPageControl_Main_ASPxCallbackPanel_Redagavimas_ASPxCallbackPanel_RedagavimasGrid_GridLayout_Redagavimas_ASPxPopupControl_Layout_ASPxCallbackPanel_Menu )

如果ASPxComboBox_Views在ASPxPageControl选项卡中，则它不起作用。准确地说，我的页面看起来像这样：

<..>
<dx:ASPxPageControl ID="ASPxPageControl_Main">
    <TabPages>
        <dx:TabPage><..>
            <dx:ASPxGridView ID="ASPxGridView_Naudojimas">
            //From here starts partial page which is one for both tabpages
            <dx:ASPxPopupControl ID="ASPxPopupControl_Layout">
                <ContentCollection>
                    <dx:PopupControlContentControl ID="PopupControlContentControl_Layout">
                        <div><table><tr><td align="left" width="100%">
                            <dx:ASPxCallbackPanel ID="ASPxCallbackPanel_Views">
                                <PanelCollection>
                                    <dx:PanelContent ID="PanelContent1">
                                            <dx:ASPxComboBox ID="ASPxComboBox_Views" runat="server" ...>
        </dx:TabPage>
        <dx:TabPage><..>
            <dx:ASPxGridView ID="ASPxGridView_Redagavimas">
            //From here starts partial page which is one for both tabpages
            <dx:ASPxPopupControl ID="ASPxPopupControl_Layout">
                <ContentCollection>
                    <dx:PopupControlContentControl ID="PopupControlContentControl_Layout">
                        <div><table><tr><td align="left" width="100%">
                            <dx:ASPxCallbackPanel ID="ASPxCallbackPanel_Views">
                                <PanelCollection>
                                    <dx:PanelContent ID="PanelContent1">
                                            <dx:ASPxComboBox ID="ASPxComboBox_Views" runat="server" TextField="Description" ValueField="FullName" ClientInstanceName="cbViews" TextFormatString="{0}">
(deleted some properties just to be easier to read here)

您应该设置在客户端使用的所有控件的 ClientInstanceName。 

<dx:ASPxCallbackPanel ClientInstanceName="cbPanel1" ...>
<dx:ASPxHyperLink ClientInstanceName="hyperlink1" ..../>

然后： 

function(s, e) {{ 
    if (window.{0}) {{ 
        {0}.SetSelectedItem(
            {0}.FindItemByText(
                {1}.GetText()
            )
        ); 
        {0}.Focus(); 
        {2}.PerformCallback(
            {0}.GetSelectedItem().value
        ); 
    }} 
}}

哪里：
0 - 组合框客户端实例名称
1 - 超链接客户端实例名称
2 - 回调面板客户端实例名称

你真的应该访问Niranjan发布的链接。

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