Telerik RadAjaxManager在页面加载时显示/隐藏控件时出现问题
我有带下拉列表、标签和文本框的网络表单。如下图所示:Telerik RadAjaxManager在页面加载时显示/隐藏控件时出现问题,telerik,radajaxmanager,Telerik,Radajaxmanager,我有带下拉列表、标签和文本框的网络表单。如下图所示: <asp:DropDownList ID="ddlTest" runat="server" AutoPostBack="true"> </asp:DropDownList> <asp:Label ID="lblTest" runat="server" Text="Some text"> </asp:Label> <asp:TextBox ID="edtTest" runat="serv
<asp:DropDownList ID="ddlTest" runat="server" AutoPostBack="true">
</asp:DropDownList>
<asp:Label ID="lblTest" runat="server" Text="Some text">
</asp:Label>
<asp:TextBox ID="edtTest" runat="server">
</asp:TextBox>
它工作正常,但现在我想在加载页面时调用SetupVisibility:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
SetupVisibility()
End Sub
在这种情况下会出现问题:
Microsoft JScript-运行时错误:无法使用ID:ctl00\u CPH1\u lblTest更新控件。控件不存在。
问题出在哪里页面初始化时会触发页面初始化。在此事件期间,无法保证已创建控件
尝试将您的代码放入页面加载,因为此时保证已创建控件。我已经解决了这个问题。我已将文本框和标签包装到div和panel中:
<div id="panelTest_DIV" runat="server">
<asp:Panel ID="panelTest" runat="server">
<asp:Label ID="lblTest" runat="server" Text="Some text..."></asp:Label><br />
<asp:TextBox ID="edtTest" runat="server"></asp:TextBox>
</asp:Panel>
</div>
和AjaxManager:
<rad:AjaxSetting AjaxControlID="ddlTest">
<UpdatedControls>
<rad:AjaxUpdatedControl ControlID="panelTest_DIV" />
</UpdatedControls>
</rad:AjaxSetting>
内部
SetupVisibility()
I设置panelTest.Visibility
。它解决了问题。我已经在页面加载中完成了。我刚才问错了。更正。
<div id="panelTest_DIV" runat="server">
<asp:Panel ID="panelTest" runat="server">
<asp:Label ID="lblTest" runat="server" Text="Some text..."></asp:Label><br />
<asp:TextBox ID="edtTest" runat="server"></asp:TextBox>
</asp:Panel>
</div>
<rad:AjaxSetting AjaxControlID="ddlTest">
<UpdatedControls>
<rad:AjaxUpdatedControl ControlID="panelTest_DIV" />
</UpdatedControls>
</rad:AjaxSetting>