[英]Hide Panel on Child MasterPage Inside MasterPage ContentPlaceHolder using Child Content Page
我試圖在各處找到這種解決方案,但是無法使其正常工作。
我有以下代碼。
MasterPage.master:
<%@ Master Language="C#" AutoEventWireup="true" CodeFile="MasterPage.master.cs" Inherits="My_MasterPage" %>
<asp:ContentPlaceHolder id="ContentPlaceHolder1" runat="server"></asp:ContentPlaceHolder>
ChildMasterPage.master:
<%@ Master Language="C#" MasterPageFile="~/MasterPage.master" AutoEventWireup="true" CodeFile="ChildMasterPage.master.cs" Inherits="My_ChildMasterPage" %>
<%@ Register TagPrefix="uc1" TagName="FileDirectoryOrganizer" Src="~/Controls/my.ascx" %>
<asp:Content ID="Content7" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
<asp:panel id="SideNav" runat="server">
<aside id="sideBar">
There are 2 User Controls <asp:uc1> inside of this area
</aside>
</asp:panel>
<div>
<asp:ContentPlaceHolder ID="contentBody" runat="server" />
<hr />
<h3>Related Topics</h3>
</div>
</asp:Content>
my.aspx:
<%@ Page Title="" Language="C#" MasterPageFile="~/SubDirectory/ChildMasterPage.master" AutoEventWireup="true" CodeFile="my.aspx.cs" Inherits="SubDirectory_my" %>
<%@ MasterType VirtualPath="~/SubDirectory/ChildMasterPage.master" %>
<%@ Reference VirtualPath="~/MasterPage.master" %>
<asp:Content ID="Content1" ContentPlaceHolderID="contentBody" Runat="Server">
</asp:Content>
我在my.aspx代碼中嘗試了以下操作,以從ChildMasterPage.master隱藏“ SideNav”面板:
1)
protected void Page_Load(object sender, EventArgs e)
{
ContentPlaceHolder cpHolder = this.Master.FindControl("Content7") as ContentPlaceHolder;
Panel p = cpHolder.FindControl("SideNav") as Panel;
p.Visible = false;
}
2)
protected void Page_Load(object sender, EventArgs e)
{
ContentPlaceHolder cpHolder = this.Master.FindControl("ContentPlaceHolder1") as ContentPlaceHolder;
Panel p = cpHolder.FindControl("SideNav") as Panel;
p.Visible = false;
}
3)
protected void Page_Load(object sender, EventArgs e)
{
Panel p = this.Master.FindControl("SideNav") as Panel;
p.Visible = false;
}
當嘗試加載使用ChildMasterPage的aspx頁面時,所有這些給了我以下錯誤:
500 - Internal server error.
There is a problem with the resource you are looking for, and it cannot be displayed.
最終,我希望它不顯示任何樣式,以便在aspx頁面上不使用空格。 這樣的事情,給了我與上面相同的錯誤:
protected void Page_Load(object sender, EventArgs e)
{
((Panel)this.Page.Master.FindControl("SideNav")).Style.Add("display", "none");
}
預先感謝您提供的任何幫助。 另外,如果您已經在這里回答了這個問題,我也表示歉意,但是我找不到它。 至少沒有任何效果。 我對C#仍然不太滿意,但是我到了。
謝謝
標記
我認為您在第一種方法中已將Content
控件類型轉換為ContentPlaceHolder
控件。
我相信代碼應如下所示:
Content cpHolder = this.Master.FindControl("Content7") as Content;
希望這會有所幫助!
我沒有嘗試強迫my.aspx.cs在ChildMasterPage.master上“查看”面板,而是執行以下操作:
my.aspx.cs
public partial class SubDirectory_my : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
My_ChildMasterPage hideMySideBar = this.Master;
hideMySideBar.HideSideBar();
}
ChildMasterPage.master
public void HideSideBar()
{
SideNav.Visible = false;
}
這會將子級母版頁的類強制轉換為新變量,然后該變量可以作用於該子級,或從后面的my.aspx代碼中調用子級母版頁代碼中的函數。 感謝我的同事弄清楚這一點。
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