How do I change the Visibility of System.Windows.Control.Label ?

Question

0.00/5 (No votes)

See more:

XML

<StackPanel Orientation="Horizontal">
    <Label Name="status" Content="" Width="62" Background="Green" Height="38"></Label>
</StackPanel>

I would like to change the visibility of the 'status' Label from my C# code, if certain conditions are satisfied then I want to display the 'status' element else I want to hide it.

I am able to access the 'status' variable inside any method of MainWindow class, but I want to access it in some other class under the same namespace.

Posted 20-Feb-14 21:48pm

Guru Swaroop

Updated 25-Feb-14 17:13pm

v4

Add a Solution

Comments

agent_kruger 21-Feb-14 3:50am

i think so, the language you are using is ASP.Net?

Guru Swaroop 21-Feb-14 11:04am

Sorry I am using .NET framework 4.0 and not ASP.NET

agent_kruger 21-Feb-14 11:31am

no the language you are developing the software in?

Guru Swaroop 21-Feb-14 22:10pm

I am developing the software in C#, on Visual Studio 2010 using WPF Application

Guru Swaroop 21-Feb-14 22:10pm

I am developing the software in C#, on Visual Studio 2010 using WPF Application

4 solutions

Solution 1

Try:

C#

status.Visibility = Visibility.Hidden;

Or:

C#

status.Visibility = Visibility.Visible;

Posted 20-Feb-14 21:55pm

OriginalGriff

Comments

Guru Swaroop 21-Feb-14 4:02am

Well this is not working since I am not accessing these variables inside MainWindow class, but rather I want to access them in some other class under same namespace.

OriginalGriff 21-Feb-14 4:18am

Then you have to add properties or methods to your MainWindow class to manipulate them, and access those via the MainWindow instance.

Guru Swaroop 21-Feb-14 5:52am

Yeah.. I just tried it, but It is not getting modified.

OriginalGriff 21-Feb-14 5:57am

What exactly did you try?
Show the code, please!

Guru Swaroop 21-Feb-14 10:36am

In the MainWindow.xaml.cs file :

namespace FaceTrackingBasics
{ ...
...
public partial class MainWindow : Window
{ ...
...
public void ChangeVisibility()
{
this.status.Visibility = System.Windows.Visibility.Hidden;
}
}
...
...
}

In the ExpressionRecognition.cs file :

namespace FaceTrackingBasics
{ ...
...
public class SkeletonFaceTracker : IDisposable
{ private static MainWindow win = new MainWindow();
...
...
private void displayExpression(EnumIndexableCollection<animationunit,float> animUnits)
{
int expression = -1;

expression = exp.NearestNeighbourClassifier(new AnimationCoefficient(animUnits.ToArray()), 3);

win.ChangeVisibility();
}
}
}

Well I think the way I am trying to instantiate the MainWindow in SkeletonFaceTracker is incorrect, though visual studio 2010 is not showing any error.

OriginalGriff 21-Feb-14 10:45am

The name "MainWindow" does kinda imply that it is you main window - i.e. it is the basis of your application. So why are you doing this:
private static MainWindow win = new MainWindow();
inside your SkeletonFaceTracker class? Any instance you from there will not be the same as the MainWindow you are displaying - you don't even display the SkeletonFaceTracker version!

You need to either get hold of the actual instance that is being displayed (poor idea from an OOPs POV) or better create an event in your SkeletonFaceTracker class which the MainWindow handles. SkeletonFaceTracker then raises the event and teh MainWindow itself controls teh visibility.

It's Winforms based, not WPF, but have a look at this:
http://www.codeproject.com/Tips/548131/Transferring-information-between-two-forms-Part-2
It shows you what I mean.

Guru Swaroop 23-Feb-14 1:10am

Yeah... This technique of using Events to send information between classes really helps.

Solution 4

See the example[^] given.

-KR

Posted 21-Feb-14 5:11am

Krunal Rohit

Solution 2

status.Visibility=System.Windows.Visibility.Hidden;

Posted 20-Feb-14 22:41pm

amaresh madivalar

Updated 21-Feb-14 0:08am

v2

Comments

Guru Swaroop 21-Feb-14 5:07am

same problem as mentioned earlier... cannot access status.Visibility

OriginalGriff 21-Feb-14 5:59am

Reason for my vote of one: duplication of existing answer, posted an hour earlier...
This can be taken as rep hunting and abuse, so I would strongly suggest that you try hard to ensure it doesn't happen again...

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Guru Swaroop · Accepted Answer · 2014-02-22T19:44:00

The solution to this problem is achieved by making use of Events, to send information from one class to another, as was rightly pointed out by OriginalGriff in one of the previous comments, have a look at this article authored by OriginalGriff :

Transferring information between two forms, Part 2: Child to Parent[^]

Another useful article which introduces to us the concept of Events is :
Delegates - a 15 minutes quick start tutorial[^]

The solution to this problem can be summarized as follows:

All the variables which are defined in the MainWindow.xaml file are accessible only in MainWindow class which is present in MainWindow.xaml.cs, so to access these variables in any other class in the same project,we have to make use of Events. We can trigger the Event in that class where we want to access the variables of MainWindow.xaml and handle that Event in MainWindow class. Thats it.

How do I change the Visibility of System.Windows.Control.Label ?

4 solutions

Solution 1

Solution 4

Solution 5

Solution 2

Add your solution here

Preview 0

Existing Members

...or Join us