How to make Textblock visible from child page into parent page

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4.00/5 (1 vote)

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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?!?

C#

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;
            }
        }

Posted 16-Aug-12 21:14pm

Member 8295307

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Sangramsingh Pawar 17-Aug-12 3:39am

put your code in which InfoIsVisible() called in your child page

1 solution

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1897 · Accepted Answer · 2012-08-16T21:44:00

Solution 1

Hi,try this solution:

C#

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;
            }
        }

Posted 16-Aug-12 21:44pm

1897

Comments

Sangramsingh Pawar 17-Aug-12 3:47am

good ans My 5+

Member 8295307 17-Aug-12 4:39am

Hi I try your solution like this, but get an error : Unable to cast MainPage in Navigation.Automation

MainPage contains Automation (Page type, the Parent in my explanation) who contains Lumiere (Page type, the Child who wants to interact with the Parent)

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

//MainPage m = (MainPage)Application.Current.RootVisual;
Automation aut = (Automation)Application.Current.RootVisual;
aut.txtConnection.Visibility = Visibility.Visible;

error.Text("état du msg : " + txtConnection.Visibility.ToString());
error.Show();
}
else
{
txtConnection.Visibility = Visibility.Collapsed;
}
}

Member 8295307 17-Aug-12 6:35am

OK I change a litle bit the config and put txtConnection on the MainPage and it's working. Thanks for your help