无法使用C#访问代码中的页面中的某些元素

Question

以下代码显示了我的网页的一部分.

<h3 ID = "pageno">Page <%=PageNumber%> of <%=MaxPageNumber()%></h3> 

<asp:Button ID="btnPrevPage" runat="server" Text="Prev Page" Class="Shape1" OnClick="onPrevPageClick" />  
<asp:Button ID="btnNextPage" runat="server" Text="Next Page" Class="Shape1" OnClick="onNextPageClick" />

在后面的代码中,我使用以下代码.

btnPrevPage.Visible = false;
btnNextPage.Visible = false;
pageno.Visible = false;

问题是按钮被隐藏而第三行隐藏页面时没有,当我在代码中包含它时,它会抛出以下错误 CS0103:当前上下文中不存在名称'pageno'.我该如何解决？

完整堆栈跟踪如下

    Compilation Error

Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately. 

Compiler Error Message: CS0103: The name 'pageno' does not exist in the current context

Source Error:


Line 37:        BlogEntries1.SetData(myDataSet, "");
Line 38:        
Line 39:        pageno.Visible = false;
Line 40:        btnPrevPage.Visible = false;
Line 41:        btnNextPage.Visible = false;

Source File: c:\Inetpub\wwwroot\casts-alt\blog\blog2.aspx.cs    Line: 39 

Answer 1

您需要添加runat属性才能访问后面的代码中的元素

 <h3 ID = "pageno" runat="server">Page <%=PageNumber%> of <%=MaxPageNumber()%></h3>