Adjusting Panels in WPF programatically ? - WPF Discussion Boards

Re: Custom classes in XAML - Assign properties after parents set

Ian Shlasko4-Aug-09 12:14

4-Aug-09 12:14

Was trying to avoid using DependencyProperties for everything. The model itself is going to have hundreds of fields (Some of my custom classes generate groups of others - Think reporting tool), so I was leaning toward a create-and-forget layout.

I did some more research, and it seems WPF actually DOES do a top-down loading order, but only for classes derived from FrameworkElement (There's an attribute that only affects those).

I used a different strategy, first letting it be created bottom-up style, then manually traversing it top-down to apply the properties. It's not as clean, but it works.

Proud to have finally moved to the A-Ark. Which one are you in?
Developer, Author (Guardians of Xen)

Re: Custom classes in XAML - Assign properties after parents set

Super Lloyd4-Aug-09 13:06

Super Lloyd

4-Aug-09 13:06

I also mentioned INotifyPropertyChanged, did you notice?
All my model class are plain CLR object now.
But I do implement INotifyPropertyChanged, and it works like a charm, and tracks my change!
No need for DependencyProperty.
Better your UI update as does your model with that!

A train station is where the train stops. A bus station is where the bus stops. On my desk, I have a work station....
_________________________________________________________
My programs never have bugs, they just develop random features.

Re: Custom classes in XAML - Assign properties after parents set

Ian Shlasko4-Aug-09 15:57

Ian Shlasko

4-Aug-09 15:57

That would work, but it's geared more for a one-time load than real-time updates.

Here's a better example of how it works:

<RegionElement Style="B=LR">
   <Cell>Some Text</Cell>
   <Cell Style="B=TB">Middle cell</Cell>
   <Cell>Other text</Cell>
</RegionElement>

I have my own codes set up for styles, so I can define them easily as strings, but as a quick summary, "B" stands for border, and it takes L,T,R,B for the sides (Among other things)...

So the idea here is that the RegionElement gets defined, and gets a style set, so it knows that it and everything inside it will by default have borders on the left and right sides.

Then the middle cell gets defined, and has a style for borders on the top and bottom.   Now, it can look up to its parent element (Only one level up in this case) and see that it should start with left and right... It combines the two, and puts a border on all four sides.

What REALLY happens is that the middle cell gets a style of "TB" (Top/bottom), but doesn't have a parent yet, because WPF set the properties before adding it to the RegionElement.   It has no parent, so just uses left/right, and never sees top/bottom.

My solution was to give the base class for GridElements an Initialize() method, so the style is first just stored as a string, and then when the model is put together, an Initialize() call runs down the tree and does the processing on that style.

It's not ideal, but going the INotifyPropertyChanged route adds more overhead than is warranted, as this was never intended to be updated in real-time.

(This framework is starting to come together really nicely... Wish I could release it on CP, but it's work-for-hire, so not mine to give away)

Proud to have finally moved to the A-Ark. Which one are you in?
Developer, Author (Guardians of Xen)

How can I cache data in WPF application?

Kunal Chowdhury «IN»3-Aug-09 1:06

Kunal Chowdhury «IN»

3-Aug-09 1:06

Hi, I am using WPF 3.5 SP1 to build Desktop based application.

I want to make my application such that, it can check for the online status. If internet connection is available, it will call the WCF service & cache the data locally. If internet connection is not available, it will peek up the data from the local cache. If my application closed & then restarted after 5 days it should remain the cache & display data from that. Only if internet connection is available it will fetch the new data.

Is it possible in WPF? If so, how can I achieve this? Please share the link/code for achieving this...

Regards,
- Kunal Chowdhury (My Blog)

Re: How can I cache data in WPF application?

Pete O'Hanlon3-Aug-09 1:32

Pete O'Hanlon

3-Aug-09 1:32

If I were you I'd look into using Microsoft's Sync Framework[^], which was designed to cope with tasks like this. Here's a sample using it[^].

"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 | Onyx

Re: How can I cache data in WPF application?

Kunal Chowdhury «IN»3-Aug-09 2:43

Kunal Chowdhury «IN»

3-Aug-09 2:43

Thanks Pete O'Hanlon. Exactly the same thing I was looking around...

Regards,
- Kunal Chowdhury (My Blog)

How to Give Header in multicolunm TreeView and also implement sorting algo?

sachinjadhavcm2-Aug-09 23:54

sachinjadhavcm

2-Aug-09 23:54

Hi!

i have created tree view demo in WPF by Using sir Josh Smith sample code but i want to give header and when header is clicked it sort data. i want to create demo like this

header1………….header2……….header3

-parent1…………..parent2………..parent3

…-child1……………-child1………….child1

……child1……………-child1…………child1

-parent2…………..parent2………..parent2

…-child2……………-child2………….child2

……child……………-child2…………child2

parent3…………….parent3………..parent3

plz suggest any link or samples code.
thank you!

Adjusting Panels in WPF programatically ?

Krishna Aditya2-Aug-09 20:31

Krishna Aditya

2-Aug-09 20:31

Hi,

I am working on WPF controls, I have a halt at adjusting one of the controls programatically.
I have 2 radiobuttons (rdbtn1, rdbtn2) and a dockpanel(2 controls) with a stackpanel(with textbox and button)a another stackpanel(with 2 textboxes).

so the panels are placed at (40,10,0,0) and (40,150,0,0) with panel1 above and panel2 below it.

actually the problem is selecting one of radiobuttons .
if i select rdbtn2, the panel1 shuld be invisible and the panel2 should stretch (not shift, which mean if the panel2 height is 200 and it should stretch its starting point in vertical to 10 and its lower limit should be same , making total height of 140 + 200 )to the panel1 starting location .

so, only panel2 shuld be visible. how to do this programatically in C#?

Please help..

Thank you,
Ramm

Re: Adjusting Panels in WPF programatically ?

Christian Graus2-Aug-09 22:02

Christian Graus

2-Aug-09 22:02

I would put them in a stackpanel or a grid, and try to set them up so their size is determined by the available space, so that when you collapse one, the other would fill the space.

Christian Graus

Driven to the arms of OSX by Vista.

Read my blog to find out how I've worked around bugs in Microsoft tools and frameworks.

Global Styles - Update

#realJSOP2-Aug-09 1:02

#realJSOP

2-Aug-09 1:02

Okay, I found out what's eating my (non-keyed) global style. I had this in my app.xaml (my global textbox style is in Styles.xaml):

<ResourceDictionary Source="/PresentationFramework.Aero;V3.0.0.0;31bf3856ad364e35;component/themes/aero.normalcolor.xaml" >
    <ResourceDictionary.MergedDictionaries>
        <ResourceDictionary Source="/WpfTest;component/Dictionaries/Resources.xaml" />
        <ResourceDictionary Source="/WpfTest;component/Dictionaries/Styles.xaml" />
    </ResourceDictionary.MergedDictionaries>
</ResourceDictionary>

When I changed it to this, all of a sudden my style started to work as expected:

<ResourceDictionary>
    <ResourceDictionary.MergedDictionaries>
        <ResourceDictionary Source="/WpfTest;component/Dictionaries/Resources.xaml" />
        <ResourceDictionary Source="/WpfTest;component/Dictionaries/Styles.xaml" />
    </ResourceDictionary.MergedDictionaries>
</ResourceDictionary>

0) Why does this work like this? Is it a bug or "as designed"?

1) The reason I was adding the aero.normalcolor resource dictionary was to force XP to use the aero theme. How do I force the aero look and still be able to use my own global style overrides? Can I do this and get the same results?

<ResourceDictionary>
    <ResourceDictionary.MergedDictionaries>
        <ResourceDictionary Source="/PresentationFramework.Aero;V3.0.0.0;31bf3856ad364e35;component/themes/aero.normalcolor.xaml" />
        <ResourceDictionary Source="/WpfTest;component/Dictionaries/Resources.xaml" />
        <ResourceDictionary Source="/WpfTest;component/Dictionaries/Styles.xaml" />
    </ResourceDictionary.MergedDictionaries>
</ResourceDictionary>

"Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
-----
"...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001

How to display a document in silverlight?

CBenac31-Jul-09 14:27

CBenac

31-Jul-09 14:27

Sadly, I found out that SL 3 doesn't support the FlowDocument.
I need to load a xaml file from the server into the client browser. No problem doing that using the webservice. The problem is how to display the file in a page and allow for printing.

NOTE: The xaml file is actually a simple table having 2 columns and several rows with simple text attributes

Re: How to display a document in silverlight?

Michael Sync31-Jul-09 18:21

Michael Sync

31-Jul-09 18:21

You can use

XamlReader.Load()

.

Hope it helps.

Thanks and Regards,
Michael Sync ( Blog: http://michaelsync.net)

Microsoft MVP (Silverlight), WPF/Silverlight Insiders

Use Themes?

#realJSOP31-Jul-09 1:09

#realJSOP

31-Jul-09 1:09

We have a number of button images used in our app. As expected, management isn't sure that it's happy with the current images, so I am trying to come up with several different sets that can easily be swapped into the application. What's the best way to go about doing this? Is "use themes" the answer? If so, can someone steer me to relevant discussions/examples?

Re: Use Themes?

Super Lloyd31-Jul-09 1:52

Super Lloyd

31-Jul-09 1:52

I'm not sure how theming work, never did it myself.
Although this codeplex library can help perhaps?
http://wpfthemes.codeplex.com/[^]

In my case I use object template in the App resource if I want to change the look of the object.

But your case is a it different.
You don't specially want to change the look of button in general (or so it seems) but of individual button in particular...

Maybe their image content or whatever could be:
<Button Content="{StaticResource buttonFooContent}">

And then in you app resource you can define
<SomeUI x:Key="buttonFooContent" x:Shared="true" />

and you can change the content anytime in the App resource file and everyone will get it!
How about that?! Smile | :)

Re: Use Themes?

Pete O'Hanlon31-Jul-09 1:53

Pete O'Hanlon

31-Jul-09 1:53

This[^] article isn't a bad start.

"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 | Onyx

How to add silverlight.

Blikkies30-Jul-09 21:20

Blikkies

30-Jul-09 21:20

Hey all

Im new to silverlight, just want to know how to embed or add silverlight to an existing ASP.net project. In flash you only use the following code:

<object width="871px" height="400px">
                <param name="aa" value="aa.swf" />
                <embed src="flash\aa.swf" width="871px" height="400px"></embed>
            </object>

Can someone tell me how do it with Silverlight.

Thanx

Re: How to add silverlight.

Mark Salsbery31-Jul-09 5:08

Mark Salsbery

31-Jul-09 5:08

Integrating Silverlight with a Web Page[^]

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

Re: How to add silverlight.

Blikkies2-Aug-09 8:17

Blikkies

2-Aug-09 8:17

Thanks!

Use XAML file as vector image

Jack Valmadre30-Jul-09 12:01

Jack Valmadre

30-Jul-09 12:01

Hi,

I have a few vector images in XAML format that I'd like to display in my application. So far I've been able to do this using:

private XmlReader reader_;
private UIElement control_;
...
reader_ = XmlReader.Create(filename_);
control_ = (UIElement)XamlReader.Load(reader_);

Then having a Control property:

public UIElement Control
{
    get
    {
        return control_;
    }
}

And binding to this as below:

<DataTemplate DataType="{x:Type local:Tile}">
  ...
    <Viewbox>
      <Label Content="{Binding Control}" />
    </Viewbox>
  ...

This works, but when I try and display the control in multiple controls in the same window, only one will appear. I was able to fix it by doing this:

public UIElement Control
{
    get
    {
        XmlReader reader = XmlReader.Create(filename_);
        return (UIElement)XamlReader.Load(reader);
    }
}

But I'd really like to avoid parsing the XAML and reloading the control every time I use it! This is my first WPF project. Can someone recommend a better way of doing this?

Cheers!

Jack

Re: Use XAML file as vector image

Christian Graus30-Jul-09 13:57

Christian Graus

30-Jul-09 13:57

I define my vector images as resources, then create controls which point to that resource for their background property, from memory.

Christian Graus

Driven to the arms of OSX by Vista.

Read my blog to find out how I've worked around bugs in Microsoft tools and frameworks.

How to define windows property in resourcedictionary

vidster30-Jul-09 3:23

vidster

30-Jul-09 3:23

I'm just looking into using WPF and have a simple problem.

I just want to style a treeview control, but when I add the styling to my resource dictionary, I get error :

"The attached property 'Window.Resources' is not defined on 'ResourceDictionary' or one of its base classes."

The xml is :

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">

<Window.Resources>

<Style TargetType="{x:Type TreeViewItem}">

..........

</Style>

</Window.Resources>

</ResourceDictionary>

Re: How to define windows property in resourcedictionary

Pete O'Hanlon30-Jul-09 4:35

Pete O'Hanlon

30-Jul-09 4:35

Window.Resources is needed to define a resource in your Window XAML (in the same way as UserControl.Resources is used in a UserControl, and so on). You don't need this in a resource dictionary, so you need to remove the lines

:<Window.Resources>

and

</Window.Resources>

"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 | Onyx

Re: How to define windows property in resourcedictionary [modified]

vidster30-Jul-09 5:37

vidster

30-Jul-09 5:37

I want to keep styling seperate. I have defined the resourcedictionary in the Application XAML, so it should work?

I have been following this tutorial :

http://blogs.vbcity.com/xtab/archive/2007/09/10/8693.aspx[^]

modified on Thursday, July 30, 2009 12:09 PM

Re: How to define windows property in resourcedictionary

Pete O'Hanlon30-Jul-09 8:46

Pete O'Hanlon

30-Jul-09 8:46

vidster wrote:
I have defined the resourcedictionary in the Application XAML, so it should work?

That's right. Just remember that it's an application resource, so you don't have to wrap it in a container Resources section such as a Window.Resources.

"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 | Onyx

Re: How to define windows property in resourcedictionary

vidster30-Jul-09 23:21

vidster

30-Jul-09 23:21

Yes, but I'm not setting the style in the Application XAML, I just want to point it to my resource dictionary (Styles.XAML) :

<Application.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="Styles.xaml" />
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Application.Resources>

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