从内容页在母版页上设置属性值

将页面指令添加到子页面:

<%@ MasterType VirtualPath="~/MasterPage.master" %>

然后将属性添加到母版页:

public string Section { get; set; }

您可以通过以下方式访问此属性:

Master.Section = "blog";

((MyMasterPageType)Page.Master).Roles = "blah blah";

在母版页中创建属性,然后从内容页访问该属性:

母版页:

public partial class BasePage : System.Web.UI.MasterPage
{
    private string[] _RequiredRoles = null;

    public string[] RequiredRoles
    {
        get { return _RequiredRoles; }
        set { _RequiredRoles = value; }
    }
}

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load()
    {
        Master.RequiredRoles = new string[] { /*set appropriate roles*/ };
    }
}

public abstract class BasePage : Page
{
    protected abstract string[] RequiredRoles { get; }

    protected override void OnLoad(EventArgs e)
    {
        base.OnLoad(e);

        // display the required roles in a master page
        if (this.Master != null) {
            // value-assignment
        }

    }
}

然后我让每个页面都继承自BasePage,并定义一个RequiredRoles

public partial class _Default : BasePage
{
    protected override string[] RequiredRoles
    {
        get { return new[] { "Admin", "Moderator" }; }
    }
}

这具有清洁和干燥的优点,可以去除加载处理程序代码。从BasePage继承的每个页面都需要定义一个“RequiredRoles”,否则它将无法编译。

CType(Master.FindControl(“lblName”),Label.Text=txtId.Text CType(Master.FindControl(“pnllogined”),Panel.Visible=True