WPF Discussion Boards

Re: create a button dynamically

Mark Salsbery16-Mar-09 5:42

Mark Salsbery

16-Mar-09 5:42

You want to write the code in XAML only?

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: create a button dynamically

anishkannan16-Mar-09 6:54

anishkannan

16-Mar-09 6:54

i want the concept of dynamic control creation and that control must
have the style.

Thanks...

Re: create a button dynamically

Eslam Afifi16-Mar-09 7:49

Eslam Afifi

16-Mar-09 7:49

Like this?

<Window x:Class="WpfApplication1.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Window1" Height="600" Width="300">
    <Grid>
        <Grid.Resources>
            <Style TargetType="{x:Type Button}">
                <Setter Property="Background" Value="Azure" />
            </Style>
        </Grid.Resources>

        <Grid.RowDefinitions>
            <RowDefinition />
            <RowDefinition Height="Auto" />
        </Grid.RowDefinitions>

        <Grid.Children>
            <StackPanel x:Name="stack" />
            <Button HorizontalAlignment="Center" Grid.Row="1" Content="Add button" Click="Button_Click" />
        </Grid.Children>
    </Grid>
</Window>

using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;

namespace WpfApplication1
{
    /// <summary>
    /// Interaction logic for Window1.xaml
    /// </summary>
    public partial class Window1 : Window
    {
        public Window1()
        {
            InitializeComponent();
        }

        private void Button_Click(object sender, RoutedEventArgs e)
        {
            var button = new Button() { Content = "Newly added button" };

            var rnd = new Random(DateTime.Now.ToBinary().GetHashCode());
            switch (rnd.Next(3))
            {
                case 0:
                    button.Background = Brushes.BlueViolet;
                    break;
                case 1:
                    var style = new Style();
                    style.Setters.Add(new Setter(Button.BackgroundProperty, Brushes.DarkBlue));
                    button.Style = style;
                    break;
            }

            stack.Children.Add(button);
        }
    }
}

Eslam Afifi

Re: create a button dynamically

Eslam Afifi16-Mar-09 12:25

Eslam Afifi

16-Mar-09 12:25

I discourage the use of this method unless you really "really" have to put your class in a single xaml file. I can't even think of a scenario where you'd have to use this method.

I've just found out that you can place both the markup and the code in the xaml file.

<Window x:Class="WpfApplication1.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Window1" Height="600" Width="300">
    <Grid>
        <Grid.Resources>
            <Style TargetType="{x:Type Button}">
                <Setter Property="Background" Value="Azure" />
            </Style>
        </Grid.Resources>

        <Grid.RowDefinitions>
            <RowDefinition />
            <RowDefinition Height="Auto" />
        </Grid.RowDefinitions>

        <Grid.Children>
            <StackPanel x:Name="stack" />
            <Button HorizontalAlignment="Center" Grid.Row="1" Content="Add button" Click="Button_Click" />
        </Grid.Children>
    </Grid>


    <x:Code>
        <![CDATA[
            public Window1()
            {
                InitializeComponent();
            }

            private void Button_Click(object sender, RoutedEventArgs e)
            {
                var button = new Button() { Content = "Newly added button" };
                var rnd = new Random(DateTime.Now.ToBinary().GetHashCode());
                
                switch (rnd.Next(3))
                {
                    case 0:
                        button.Background = Brushes.BlueViolet;
                        break;
                    case 1:
                        var style = new Style();
                        style.Setters.Add(new Setter(Button.BackgroundProperty, Brushes.DarkBlue));
                        button.Style = style;
                        break;
                }

                stack.Children.Add(button);
            }
        ]]>
    </x:Code>
</Window>

You don't have to place the code in a CDATA section. You even can do this.

<Window x:Class="WpfApplication1.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Window1" Height="600" Width="300">
    <Grid>
        <Grid.Resources>
            <Style TargetType="{x:Type Button}">
                <Setter Property="Background" Value="Azure" />
            </Style>
        </Grid.Resources>

        <Grid.RowDefinitions>
            <RowDefinition />
            <RowDefinition Height="Auto" />
        </Grid.RowDefinitions>

        <Grid.Children>
            <StackPanel x:Name="stack" />

            <x:Code>
                public Window1()
            {
                InitializeComponent();
            }

            private void Button_Click(object sender, RoutedEventArgs e)
            {
                var button = new Button() { Content = "Newly added button" };
                var rnd = new Random(DateTime.Now.ToBinary().GetHashCode());
                
                switch (rnd.Next(3))
            </x:Code>

            <Button HorizontalAlignment="Center" Grid.Row="1" Content="Add button" Click="Button_Click" />
        </Grid.Children>
    </Grid>

    <x:Code>
                {
                    case 0:
                        button.Background = Brushes.BlueViolet;
                        break;
                    case 1:
                        var style = new Style();
                        style.Setters.Add(new Setter(Button.BackgroundProperty, Brushes.DarkBlue));
                        button.Style = style;
                        break;
                }

                stack.Children.Add(button);
            }
    </x:Code>
</Window>

Eslam Afifi

Re: create a button dynamically

anishkannan16-Mar-09 18:57

anishkannan

16-Mar-09 18:57

Thank you for Replay

That code is enough. what i am expecting.

And I have another one doubt. How can use wpf in MVP/MVC

design pattern.

Thanks...

Re: create a button dynamically

Eslam Afifi16-Mar-09 23:07

Eslam Afifi

16-Mar-09 23:07

I learned the MVVM pattern from this article[^].
Read this[^] too.

Eslam Afifi

New article to help you answer your questions on WPF

TechiGIRL15-Mar-09 21:20

TechiGIRL

15-Mar-09 21:20

Hello!
I found new article on WPF development for visualization cartographical objects. Really interesting and useful one. Do want to share it with all of you! Here is a direct link
http://techzone.enterra-inc.com/architecture/cartographical-objects-visualization-using-wpf/[^]f/

Enjoy reading!
and let's discuss it here!

Re: New article to help you answer your questions on WPF

TechiGIRL25-Mar-09 22:33

TechiGIRL

25-Mar-09 22:33

and here is a continuation for the article
direct link is here http://techzone.enterra-inc.com/architecture/algorythm-of-defining-plain-polygon-signature-point/[^]

WPf trreview Insertion with binding

thangavel198715-Mar-09 21:03

thangavel1987

15-Mar-09 21:03

I have to insert items to treeview . using data binding . i am new to WPF
Pls anyone help me
my code is

<treeview itemssource="{Binding CategoryRecordList}" name="CategoryList<br mode=" hold=" /><br mode=">

Re: WPf trreview Insertion with binding

ABitSmart15-Mar-09 21:42

ABitSmart

15-Mar-09 21:42

See here[^], here[^] and here[^]

Re: WPf trreview Insertion with binding

Eslam Afifi16-Mar-09 1:51

Eslam Afifi

16-Mar-09 1:51

I recommend you read this article[^].

Eslam Afifi

Popup window in silverlight

sumit703415-Mar-09 19:31

sumit7034

15-Mar-09 19:31

Hi I have two xaml file in my project Page.xaml and page2.xaml.
I want when user click on button from page.xaml then new popup window will be open for page2.xml. I have searched some examples but they open it in a same window.

Please Help

Thanks in advance

Re: Popup window in silverlight

Pete O'Hanlon15-Mar-09 23:02

Pete O'Hanlon

15-Mar-09 23:02

You have to open the second window in a dialog, see here[^] for details.

"WPF has many lovers. It's a veritable porn star!" - Josh Smith

As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.

My blog | My articles | MoXAML PowerToys

Re: Popup window in silverlight

sumit703415-Mar-09 23:45

sumit7034

15-Mar-09 23:45

Thanks for the reply
But still the second window is opened in the same page.
Is there any way to open it in a other window?

Re: Popup window in silverlight

Mark Salsbery16-Mar-09 6:25

Mark Salsbery

16-Mar-09 6:25

There's no "other window"s in Silverlight.

Windows are controlled by the browser, so if you want a new window you
could use something like HtmlPage.PopupWindow[^] or HtmlWindow.Navigate[^]

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: Popup window in silverlight

Braulio Dez1-Apr-09 6:02

Braulio Dez

1-Apr-09 6:02

The popups that you can create are on the same page (like AJAX Modal Dialogs).

You can open a popup calling from Silverlight a javascript function, but they will be an HTML popup (altough you can initialize inside another XAP application).

HTH
Braulio

/// -------------------------
     Braulio Díez

     DBSchemaEditor.com
     Free Silverlight based DB Schema Modeling Tool
/// -------------------------

WPF Weird behavior or me? [modified]

Mike Hankey15-Mar-09 13:07

Mike Hankey

15-Mar-09 13:07

Hey y'all has anyone else run across this problem? and if so is there a work around?

I have a ResourceDictioinary where I have a linear brush declared;

<LinearGradientBrush x:Key="BlueLinearBrush" EndPoint="0.5,1" StartPoint="0.5,0">
    <gradientstop color="PowderBlue" offset="0" />
     <gradientstop color="SteelBlue" offset="1" />
</LinearGradientBrush>

and a style that uses the Brush

<style x:key="CustomBorderStyle" targettype="{x:Type Border}">
    <setter property="Background" value="{StaticResource BlueLinearBrush}" />
   .....
</style>

In my App.xaml file I have cone the MergeDictioinaires

then in my code I use it:

.....
 <border horizontalalignment="Stretch">Style="{StaticResource CustomBorderStyle}">
     <textblock text="{Binding Path=Name}" horizontalalignment="Center" fontweight="Bold" />
 </border>
.....

but it gives me problems here?

I've googled and the examples I've found say this is legal as seen here[^]. The app runs fine but its annoying because I can't see the design or look at properties because of the error.

WTF?
Mike

"It doesn't matter how big a ranch ya' own, or how many cows ya' brand, the size of your funeral is still gonna depend on the weather." -Harry Truman.

Semper Fi
http://www.hq4thmarinescomm.com[^]
My Site

modified on Sunday, March 15, 2009 8:26 PM

Re: WPF Weird behavior or me?

Mark Salsbery15-Mar-09 18:45

Mark Salsbery

15-Mar-09 18:45

Mike Hankey wrote:
WTF?

No. That's "WPF" Smile | :)

I plugged your brush and style code in without using merged dictionaries (just put
it in the Application.Resources). Aside from the typo:

<border horizontalalignment="Stretch">Style="{StaticResource CustomBorderStyle}">

which should be:

<border horizontalalignment="Stretch" Style="{StaticResource CustomBorderStyle}">

it worked fine.

What's the error?

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: WPF Weird behavior or me?

Mike Hankey16-Mar-09 1:48

Mike Hankey

16-Mar-09 1:48

Thanks for your input Mark. See the response I gave to Pete.

Mike

"It doesn't matter how big a ranch ya' own, or how many cows ya' brand, the size of your funeral is still gonna depend on the weather." -Harry Truman.

Semper Fi
http://www.hq4thmarinescomm.com[^]
My Site

Re: WPF Weird behavior or me? [modified]

Pete O'Hanlon15-Mar-09 22:44

Pete O'Hanlon

15-Mar-09 22:44

Mike - what error do you get? Apart from the invalid markup here horizontalalignment="Stretch">;Style="{StaticResource CustomBorderStyle}", this all looks perfectly legal (assuming, of course, that you have just made a mistake typing your markup in here because XAML is case sensitive, so textbox is not the same as TextBox).

"WPF has many lovers. It's a veritable porn star!" - Josh Smith

As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.

My blog | My articles | MoXAML PowerToys

modified on Monday, March 16, 2009 4:52 AM

Re: WPF Weird behavior or me?

Mike Hankey16-Mar-09 1:47

Mike Hankey

16-Mar-09 1:47

Thanks for your input Pete,

Pete O'Hanlon wrote:
horizontalalignment="Stretch">;Style="{StaticResource CustomBorderStyle}"

I'm a terrible typer...I was going back and adding the < and > 's and produced the typo.

I get these error periodically when working with UserControls, which is where the style is used and I get 3 errors.

Could not create instance of ProjectView (my user control)
Value TaskMgrResourceDictionary.xaml cannot be assigned to property 'Source'. The resource dictionary XAML file has errors and cannot be loaded.
The application XAML file failed to load. Fix errors in the application XAML before opening the XAML files.

Like you if I strip this code out and and use it in line it works great. Its in several locations also, and all are user controls? Except for the MainWindow not showing because of the errors in the user controls.

Thanks,
Mike

"It doesn't matter how big a ranch ya' own, or how many cows ya' brand, the size of your funeral is still gonna depend on the weather." -Harry Truman.

Semper Fi
http://www.hq4thmarinescomm.com[^]
My Site

Re: WPF Weird behavior or me?

Mark Salsbery16-Mar-09 5:38

Mark Salsbery

16-Mar-09 5:38

Mike Hankey wrote:
Value TaskMgrResourceDictionary.xaml cannot be assigned to property 'Source'. The resource dictionary XAML file has errors and cannot be loaded.

Since it works inline, your problem seems to be in the resources, as
indicated by the errors. That's probably a good place to look for errors Smile | :)

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: WPF Weird behavior or me?

Mike Hankey16-Mar-09 10:41

Mike Hankey

16-Mar-09 10:41

Mark,

I had this problem using a DataGrid control and turned out that I could remove the code that styled the headers and it worked for a while then quit again a short time later. I'm thinking it has something to do with UserControls but not quite sure. The reason I posted this question was to see if anyone else had had this problem using UserControls in their app. I've heard that there are problems using them and was wanting to see if this was one of them.

Thanks,
Mike

"It doesn't matter how big a ranch ya' own, or how many cows ya' brand, the size of your funeral is still gonna depend on the weather." -Harry Truman.

Semper Fi
http://www.hq4thmarinescomm.com[^]
My Site

Re: WPF Weird behavior or me?

Pete O'Hanlon16-Mar-09 11:21

Pete O'Hanlon

16-Mar-09 11:21

I use UserControls extensively and I've never had any problems with them. The only thing I can think of is that you might have a problem with the way they have been registered when you have merged your ResourceDictionaries.

"WPF has many lovers. It's a veritable porn star!" - Josh Smith

As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.

My blog | My articles | MoXAML PowerToys

Re: WPF Weird behavior or me?

Mike Hankey16-Mar-09 11:46

Mike Hankey

16-Mar-09 11:46

Operator error, surely not. Smile | :)

This is my app.xaml file.

<Application x:Class="WpfTaskManager.App"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    
   <Application.Resources>        
    	<ResourceDictionary>
    		<ResourceDictionary.MergedDictionaries>
    			<ResourceDictionary Source="TaskMgrResourceDictionary.xaml"/>
    		</ResourceDictionary.MergedDictionaries>
    	</ResourceDictionary>     
    </Application.Resources>
</Application>

Appreciate the input. You've convinced me that I am the cause of the problem so will get with the program and find it. Didn't want to pull my hair out over this one, (as I get older and my hair thinner I have to be careful of the problems involving hair pulling. Smile | :)

, if it wasn't something that I had done.

Thanks,
Mike

"It doesn't matter how big a ranch ya' own, or how many cows ya' brand, the size of your funeral is still gonna depend on the weather." -Harry Truman.

Semper Fi
http://www.hq4thmarinescomm.com[^]
My Site

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