C#•2y ago

✅ [wpf] how to solve autometically closed new window when I create new window..

In StickyNotesView.xaml , I create new Window but If I click '+' that new window not only undisplayed but also programm app is closed too . why? I just fixed my xaml code <Grid IsHitTestVisible="True" > <TextBox Name="SubTextBox" IsHitTestVisible="True" TextChanged="TextBox_Changed"></TextBox> </Grid> if I remve <Grid> </Grid> and just reamin TextBox, then the problem is solved. but I wanna add button. so I should use Grid this panel. First Image is that removed Grid. so new window is displayed. but If i use upper <Grid> </Grid> then New Window is not displayed and program down. I did dbug but when dbug , that new window is displayed.,... it is weird.

32 Replies

JJOP•2y ago

this is my xaml code for creating new window's content like textBox, button.

HimmDawg•2y ago

First of all: $code

MODiX•2y ago

To post C# code type the following: ```cs // code here ``` Get an example by typing $codegif in chat If your code is too long, post it to: https://paste.mod.gg/

HimmDawg•2y ago

Second, if everything closes out of nowhere, then it seems like your App crashed Can you paste the code that executes after pressing the + Button?

JJOP•2y ago

First of all I got it error msg

JJOP•2y ago

JJOP•2y ago

. OK I try it

HimmDawg•2y ago

$codegif

MODiX•2y ago

https://cdn.discordapp.com/attachments/364492811489509376/892176158312001586/code.gif

HimmDawg•2y ago

This might make it clearer 🙂

JJOP•2y ago

https://paste.mod.gg/idfkcjivtipf/3

BlazeBin - idfkcjivtipf

A tool for sharing your source code with the world!

JJOP•2y ago

Problem is that StickyNotesView.xaml and cs file

HimmDawg•2y ago

private void newWindow() 
{
  Window win = new Window();
  _Linq.Add(new Linq { win = win, textBlock = _textBlock });
  win.Width = 300;
  win.Height = 300;

  //linq.Add(new Linq { win = win, textBlock = _textBlock });

  SubTextBox.Foreground = new SolidColorBrush(Colors.White);
  SubTextBox.Background = new SolidColorBrush(Colors.Black);
  SubTextBox.TextWrapping = TextWrapping.Wrap;
  SubTextBox.AcceptsReturn = true;  // 개행문자.
  // ==================== PROBLEM HERE =====================
  win.Content = SubTextBox;
  // =======================================================

  win.WindowStyle = WindowStyle.ThreeDBorderWindow;
  win.Show();
}

private void newWindow() 
{
  Window win = new Window();
  _Linq.Add(new Linq { win = win, textBlock = _textBlock });
  win.Width = 300;
  win.Height = 300;

  //linq.Add(new Linq { win = win, textBlock = _textBlock });

  SubTextBox.Foreground = new SolidColorBrush(Colors.White);
  SubTextBox.Background = new SolidColorBrush(Colors.Black);
  SubTextBox.TextWrapping = TextWrapping.Wrap;
  SubTextBox.AcceptsReturn = true;  // 개행문자.
  // ==================== PROBLEM HERE =====================
  win.Content = SubTextBox;
  // =======================================================

  win.WindowStyle = WindowStyle.ThreeDBorderWindow;
  win.Show();
}

So your SubTextBox is already part of a StickyNotesView (as seen in StickyNotesView.xaml) You cant have a control that is child of two different Windows / Controls I suppose you want to create another textbox in that newly created window

JJOP•2y ago

the control you saying is what? Actully first I made Control wpf page named StickyNotesView.xaml but later I changed Control to Window by writing Window in xaml and cs

JJOP•2y ago

HimmDawg•2y ago

<Window x:Class="StickyNotes.App.StickyNotesView"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
        xmlns:local="clr-namespace:StickyNotes.App"
        mc:Ignorable="d" 
        Name="myWindow"
        d:DesignHeight="200" d:DesignWidth="200">
    <Grid>
        <TextBox Name="SubTextBox" 
             IsHitTestVisible="True" 
                 TextChanged="TextBox_Changed">
        </TextBox>
    </Grid>
</Window>

<Window x:Class="StickyNotes.App.StickyNotesView"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
        xmlns:local="clr-namespace:StickyNotes.App"
        mc:Ignorable="d" 
        Name="myWindow"
        d:DesignHeight="200" d:DesignWidth="200">
    <Grid>
        <TextBox Name="SubTextBox" 
             IsHitTestVisible="True" 
                 TextChanged="TextBox_Changed">
        </TextBox>
    </Grid>
</Window>

You see that TextBox there? That's in your StickyNotesView

JJOP•2y ago

yes

HimmDawg•2y ago

What's also in your StickyNotesView is this

public StickyNotesView(TextBlock textBlock, List<Linq> linq)
{
  InitializeComponent();
  _textBlock = textBlock;
  _Linq = linq;  // _Linq references the linq in the Main view. When _Linq element is deleted, linq is also deleted
  newWindow();
}

public StickyNotesView(TextBlock textBlock, List<Linq> linq)
{
  InitializeComponent();
  _textBlock = textBlock;
  _Linq = linq;  // _Linq references the linq in the Main view. When _Linq element is deleted, linq is also deleted
  newWindow();
}

And there, newWindow() is called. at this point we know that we have a Window that contains a textbox with the name "SubTextBox"

JJOP•2y ago

yes

HimmDawg•2y ago

Now what happens in newWindow()? Exactly what I pointed out earlier: Since SubTextBox is already part of the Window we are currently at, it cannot be made the child of another Window But this is what you tried with this line of code win.Content = SubTextBox;

JJOP•2y ago

so win.Content = SubTextBox is that issue right?

HimmDawg•2y ago

Yes. That's what Visual Studio pointed out as well 🙂

JJOP•2y ago

and this is point right?

HimmDawg•2y ago

Pardon?

JJOP•2y ago

You said " You cant have a control that is child of two different Windows / Controls " so it is point in my code issue

HimmDawg•2y ago

I think i dont understand what you mean with "it is point" 🙁

JJOP•2y ago

Ah , I said main point (important point in this issue) like heart in human , An important issue for resolution. anyway thanks ! I try dbug ! But

JJOP•2y ago

when I remove Grid panel, then it is work well

JJOP•2y ago

eventhough I didn't fix problem that you point out

JJOP•2y ago

JJOP•2y ago

before I understood and resolved it ! I thought present window's item can use other window if that other window created in the same file like StickyNotesView.xaml.cs, however I wrong, thanks to you

HimmDawg•2y ago

Nice one

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✅ [wpf] how to solve autometically closed new window when I create new window..