如何使Textblock从子页面可见到父页面 [英] How to make Textblock visible from child page into parent page

问题描述

大家好

我正在使用Silverlight 5，并且具有轮询双工wcf服务来管理建筑物中的灯光.

我有2页，可以说Parent.xaml和Child.xaml.孩子在父母里面有框架.对于孩子，我希望在父"页面中显示或不显示文本块.我尝试在子级"页面的父级"页面上调用公共方法，但是可见性设置为可见"，但屏幕上没有任何变化.就像Textblock在某些东西后面，或者我正在尝试在另一个线程上进行更改....

正确设置为可见"后，为什么此文本块不会出现在我的屏幕上?！?

Hi guys

I work on silverlight 5 and have a polling duplex wcf service to manage lights in a building.

I''ve 2 pages, lets say Parent.xaml and Child.xaml. Child is inside Parent with a frame. From Child I''d like to make visible or not a Textblock in Parent page. I try calling a public method on Parent page from Child page, but the visibility is set to Visible but nothing change on screen. It''s like the Textblock was behind something or I was trying make changes on another thread....

Why does this textblock don''t appear on my screen when it''s correctly set to Visible?!?

public void InfoIsVisible(bool visibility)
        {
            if (visibility == true)
            {
                proxy.Abort();
                loadInfos();

                txtConnection.Visibility = Visibility.Visible;

                error.Text("Msg state : " + txtConnection.Visibility.ToString());
                error.Show();
            }
            else
            {
                txtConnection.Visibility = Visibility.Collapsed;
            }
        }

推荐答案

尝试以下解决方案:

Hi,try this solution:

public void InfoIsVisible(bool visibility)
        {
            if (visibility == true)
            {
                proxy.Abort();
                loadInfos();

                txtConnection.Visibility = Visibility.Visible;

                error.Text("Msg state : " + txtConnection.Visibility.ToString());
                error.Show();
            }
            else
            {
                MainPage m = (MainPage)Application.Current.RootVisual;
                m.txtConnection.Visibility = Visibility.Collapsed;
            }
        }

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