blocks|key|3413589|text|一种方法是使用javascript+(Jquery)来解决这个问题：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3413590|$('.NormalUser').hide();|code-block|syntax|javascript|3413591|http://api.jquery.com/hide/|offset|length|3413592|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|0|R|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|S|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|T|8|@]|9|@$I|U|J|V|1|W]]|A|$]]|$1|K|3|-4|5|6|7|X|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|H]]]]

One way would be to solve this problem with javascript (jquery):

<pre><code>$('.NormalUser').hide();
</code></pre>

<a href="http://api.jquery.com/hide/" rel="nofollow">http://api.jquery.com/hide/</a>

blocks|key|414312|text|您可以在母版页中创建公共属性，即|type|unstyled|depth|inlineStyleRanges|entityRanges|data|414313|public+bool+ShowPanel
{
++++set
++++{
++++++++NormalUser.Visible+=+value;
++++}
}|code-block|syntax|javascript|414314|然后这样叫它|414315|if+(Page.Master+is+NameOfMasterPage)
{
++++((NameOfMasterPage)Page.Master).ShowPanel+=+false;
}|414316|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

You could create a public property in you Master Page i.e

<pre><code>public bool ShowPanel
{
 set
 {
 NormalUser.Visible = value;
 }
}
</code></pre>

And call it like this

<pre><code>if (Page.Master is NameOfMasterPage)
{
 ((NameOfMasterPage)Page.Master).ShowPanel = false;
}
</code></pre>

blocks|key|414320|text|由于面板控件位于ContentPlaceHolder控件内，因此必须首先获取对ContentPlaceHolder的引用，然后使用其FindControl方法来定位TextBox控件。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|414321|ContentPlaceHolder+mpContentPlaceHolder;
Panel+pn;
mpContentPlaceHolder+=+(ContentPlaceHolder)Master.FindControl("PHMainBlock");
if(mpContentPlaceHolder+!=+null)
{
++++pn+=+(Panel)+mpContentPlaceHolder.FindControl("NormalUser");
++++pn.Visible+=+false;
}|code-block|syntax|javascript|414322|http://msdn.microsoft.com/en-us/library/xxwa0ff0.aspx|offset|length|414323|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|0|1H|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|S|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|T|8|@]|9|@$I|U|J|V|1|W]]|A|$]]|$1|K|3|-4|5|6|7|X|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|H]]]]

Because the Panel control is inside a ContentPlaceHolder control, you must first get a reference to the ContentPlaceHolder and then use its FindControl method to locate the TextBox control.

<pre><code>ContentPlaceHolder mpContentPlaceHolder;
Panel pn;
mpContentPlaceHolder = (ContentPlaceHolder)Master.FindControl("PHMainBlock");
if(mpContentPlaceHolder != null)
{
 pn = (Panel) mpContentPlaceHolder.FindControl("NormalUser");
 pn.Visible = false;
}
</code></pre>

<a href="http://msdn.microsoft.com/en-us/library/xxwa0ff0.aspx" rel="nofollow">http://msdn.microsoft.com/en-us/library/xxwa0ff0.aspx</a>

blocks|key|5525552|text|下面是我如何做类似的事情，它工作得很好：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5525553|if+(Page.Master+!=+null)
{
++++var+tempPanel+=+Page.Master.FindControl("MessagePanel")+as+UpdatePanel;
++++if+(tempPanel+!=+null)
++++++++tempPanel.Visible+=+true;


++++var+temp+=+Page.Master.FindControl("MessageForUser")+as+MessageToUser;
++++if+(temp+!=+null)
++++++++temp.PostWarningMessage(message,+msgInterval);
}|code-block|syntax|javascript|5525554|但是，我将"MessagePanel“和"MessageForUser”作为ContentPlaceHolder上的控件。这是我的标记：|5525555|<asp:UpdatePanel+runat="server"+Visible="true"+ID="MessagePanel"+>
++++<ContentTemplate>
++++++++<msg:MainMessage+ID="MessageForUser"+runat="server"+Visible="true"+/>++
++++++++<br+/>
++++</ContentTemplate>
</asp:UpdatePanel>
<asp:ContentPlaceHolder+ID="cphContent"+runat="server"+Visible="true">++++++++++++++
</asp:ContentPlaceHolder>|5525556|如果您将面板放在标记内，那么您应该能够在不需要Page.Master.FindControl的情况下引用面板。|5525557|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

Here's how I do something similar and it works fine:

<pre><code>if (Page.Master != null)
{
 var tempPanel = Page.Master.FindControl("MessagePanel") as UpdatePanel;
 if (tempPanel != null)
 tempPanel.Visible = true;


 var temp = Page.Master.FindControl("MessageForUser") as MessageToUser;
 if (temp != null)
 temp.PostWarningMessage(message, msgInterval);
}
</code></pre>

However, I have "MessagePanel" and "MessageForUser" as controls right above the ContentPlaceHolder. Here's my markup:

<pre><code>&lt;asp:UpdatePanel runat="server" Visible="true" ID="MessagePanel" &gt;
 &lt;ContentTemplate&gt;
 &lt;msg:MainMessage ID="MessageForUser" runat="server" Visible="true" /&gt; 
 &lt;br /&gt;
 &lt;/ContentTemplate&gt;
&lt;/asp:UpdatePanel&gt;
&lt;asp:ContentPlaceHolder ID="cphContent" runat="server" Visible="true"&gt; 
&lt;/asp:ContentPlaceHolder&gt;
</code></pre>

If you have your Panel inside of a tag, then you should be able to reference the panel without needing Page.Master.FindControl.

I have a master page file that contains a 2 menu's in a 2 panel controls.
I also use a control to check if user is logged in and get the type of user.

Deppending on the type I want to show / hide the panel. The control itself is not referenced in the master page but dynamically through the CMS System.

I want to use findcontrol in the user control to find the panel control in the master page. I have tried different methods but all come back with null.

The content placeholder in the master page is 
 asp:Content runat="server" ContentPlaceHolderID="PHMainBlock"

and the control is called
 asp:Panel ID="NormalUser" runat="server"

I have tried using the code....

<pre><code>Panel ph = (Panel)Page.Master.FindControl("NormalUser");
ph.Visible = false;
</code></pre>

but brings back null, any help?

thanks..

Accessing Master page control in ascx file

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我有一个母版页文件，其中包含2个菜单的2个面板控件。我还使用一个控件来检查用户是否已登录，并获取用户的类型。依赖于我想要显示/隐藏面板的类型。控件本身不在母版页中引用，而是通过CMS系统动态引用。我想在用户控件中使用findcontrol来查找母版页中的面板控件。我尝试过不同的方法，但都返回了null。母版页中的内容占...

问访问ascx文件中的母版页控件
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