findcontrol()方法与暴露母板属性修改法的运用

findcontrol（）方法可以在内容页中修改母板页中控件的属性。它根据控件的唯一的ID在命名容器中查找控件。此方法返回对控件的引用。

代码示例：

<%@ Master Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head >
    <style type="text/css">
        html
        {
            background-color:silver;
        }
        .content
        {
            margin:auto;
            width:700px;
            background-color:white;
            padding:10px;
        }
        h1
        {
            border-bottom:solid 1px blue;
        }

    </style>
    <title>Find Master</title>
</head>
<body>
    <form >
    <div class="content">
    <h1><asp:Literal ID="ltlBodyTitle" runat="server" /></h1>
    <asp:contentplaceholder

        runat="server" />
    </div>
    </form>
</body>
</html>

<%@ Page Language="C#" MasterPageFile="~/FindMaster.master" %>
<script runat="server">

    void Page_Load()
    {
        if (!Page.IsPostBack)
        {
            Literal ltlBodyTitle = (Literal)Master.FindControl("ltlBodyTitle");
            ltlBodyTitle.Text = "the title";
        }
    }
</script>
<asp:Content
    ID="Content1"
    ContentPlaceHolderID="ContentPlaceHolder1"
    Runat="Server">
    Content, Content, Content, Content
    <br />Content, Content, Content, Content
    <br />Content, Content, Content, Content
    <br />Content, Content, Content, Content
    <br />Content, Content, Content, Content
</asp:Content>

暴露母板属性修改：

<%@ Master Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<script runat="server">

    public string BodyTitle
    {
        get { return ltlBodyTitle.Text; }
        set { ltlBodyTitle.Text = value; }
    }
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head >
    <style type="text/css">
        html
        {
            background-color:silver;
        }
        .content
        {
            margin:auto;
            width:700px;
            background-color:white;
            padding:10px;
        }
        h1
        {
            border-bottom:solid 1px blue;
        }
    </style>
    <title>Property Master</title>
</head>
<body>
    <form >
    <div class="content">
    <h1><asp:Literal ID="ltlBodyTitle" runat="server" /></h1>
    <asp:contentplaceholder

        runat="server" />
    </div>
    </form>
</body>
</html>

<%@ Page Language="C#" MasterPageFile="~/PropertyMaster.master" %>
<%@ MasterType VirtualPath="~/PropertyMaster.master" %>
<script runat="server">

    void Page_Load()
    {
        if (!Page.IsPostBack)
        {
            Master.BodyTitle = "The Body Title";
        }
    }
</script>
<asp:Content
    ID="Content1"
    ContentPlaceHolderID="ContentPlaceHolder1"
    Runat="Server">
    Content, Content, Content, Content
    <br />Content, Content, Content, Content
    <br />Content, Content, Content, Content
    <br />Content, Content, Content, Content
    <br />Content, Content, Content, Content
</asp:Content>