如何隐藏加载内容页面上的母版div? [英] how to hide a div of master page on load content page ?

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问题描述

 受保护的  Sub  Page_Load( ByVal 发​​件人作为 对象 ByVal  e  As  System.EventArgs)句柄  .Load 

txtUsername.Focus()
.Master.FindControl( NavigationMenu)。Visible = False
.Master.FindControl( btnsignup) .Visible = True
.Master.FindControl( btnlogout)。 Visible = False

Me .Master.FindControl( Label2)。Visible = False
< span class =code-keyword> Me .Master.FindControl( lblloginuser ).Visible = False

结束 Sub











这些都工作得很好但是当我在div上应用它时错误

对象引用未设置为对象的实例。



Me.Master.FindControl(divwelcome)。可见=假



我该怎么做

plz help



谢谢

解决方案

Hello Neeraj,



试试这个

在此页面的页面加载事件中添加以下代码

  Dim  navDiv 作为 HtmlContainerControl =  DirectCast  .Master.FindControl(  divwelcome),HtmlContainerControl)
navDiv.Visible = 错误









检查aspx的id和runat =server



< div id =divwelcomerunat =server >



最好的:)请回来寻求支持。


我们应该在div中使用runat =server

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

       txtUsername.Focus()
       Me.Master.FindControl("NavigationMenu").Visible = False
       Me.Master.FindControl("btnsignup").Visible = True
       Me.Master.FindControl("btnlogout").Visible = False
       
       Me.Master.FindControl("Label2").Visible = False
       Me.Master.FindControl("lblloginuser").Visible = False

   End Sub






these all are worked fine but when i'm apply this on div then error
Object reference not set to an instance of an object.

Me.Master.FindControl("divwelcome").Visible = False

what me should to do
plz help

thanks

解决方案

Hello Neeraj,

Try this
In the page load event of this page add the following code

Dim navDiv As HtmlContainerControl = DirectCast(Me.Master.FindControl("divwelcome"), HtmlContainerControl)
navDiv.Visible = False



Or

check the aspx for id and runat= "server"

<div id="divwelcome" runat="server">

All the best:) pls write back for support.


we should use runat="server" in div


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