Use .XAP file in ASP.Net Website - WPF Discussion Boards

RugbyLeague2-Apr-09 4:09

2-Apr-09 4:09

If I insert the following bit of XAML:

<TextBlock Background="AliceBlue" DataContext="{Binding FOO}"<br />
           Text="{Binding StringFormat='Selected: {0:N0}', Path=BAR}"/ >

there is nothing in my project called FOO and certainly nothing called BAR - yet there is no error - nothing in output - the whole thing is just ignored.

Why does WPF ignore stuff?

Re: Why does WPF ignore stuff?

Pete O'Hanlon2-Apr-09 4:42

Pete O'Hanlon

2-Apr-09 4:42

I'm surprised that you haven't seen something in your Output window. What you might want to do, is use the diagnostics attached property:

<TextBlock Background="AliceBlue" DataContext="{Binding FOO, diag:PresentationTraceSources.TraceLevel=High}"
Text="{Binding StringFormat='Selected: {0:N0}', 
Path=BAR, diag:PresentationTraceSources.TraceLevel=High}"/ >

To add this in, you need to map to the diagnostics namespace:

xmlns:diag="clr-namespace:System.Diagnostics;assembly=WindowsBase"

This feature was introduced in .NET 3.5.

"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: Why does WPF ignore stuff?

RugbyLeague2-Apr-09 4:46

RugbyLeague

2-Apr-09 4:46

Thanks, it appears I was missing

DataContext="{Binding RelativeSource={RelativeSource self}}

at the top of the tree but why that should mean WPF just ignores stuff is beyond me. Still, it only wasted a few hours - it's a good job there is no swear jar here.

Re: Why does WPF ignore stuff?

Mark Salsbery2-Apr-09 5:35

Mark Salsbery

2-Apr-09 5:35

It's ignored by design. If the binding path doesn't exist then
it is quietly ignored. If the result is nothing to render, then
you're not going to see anything Smile | :)

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

Re: Why does WPF ignore stuff?

RugbyLeague2-Apr-09 5:39

RugbyLeague

2-Apr-09 5:39

Thanks for the info.

I am sure that decision made sense to somebody - I have just spent ages messing around with my layout wondering why on earth a textblock wasn't showing - I mean everything compiled, there was no output messages so it had to be layout right? I will know better next time I suppose.

Re: Why does WPF ignore stuff?

Mark Salsbery2-Apr-09 5:49

Mark Salsbery

2-Apr-09 5:49

RugbyLeague wrote:
I have just spent ages messing around with my layout wondering why on earth a textblock wasn't showing

Simply putting some static text like Text="Test" would have immediately shown
whether it was a layout or a binding problem... Poke tongue | ;-P

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

Re: Why does WPF ignore stuff?

RugbyLeague2-Apr-09 5:51

RugbyLeague

2-Apr-09 5:51

That's the first thing I did - it appeared as expected - but I refused to believe it Laugh | :laugh:

Use .XAP file in ASP.Net Website

pavanip2-Apr-09 2:42

pavanip

2-Apr-09 2:42

Hi,

I am facing problem with using .XAP file in ASP.Net Website. I have written the following code to use .XAP in .Aspx page
<form id="form1" runat="server">
<div style="height:100%; background-color:#282828;" align="right">

<table width="100%" border="0" align="center" cellpadding="0" cellspacing="0">
<tr>
<td width="1%"></td>
</tr>
<tr>
<td width="1%">
<div style="height:100%; background-color:#282828;" align="right">--%>
<asp:Silverlight ID="Xaml1" runat="server" Source="~/ClientBin/SilverlightApplication.xap" MinimumVersion="2.0.31005.0" Width="100%" Height="100%" />
</div>
</td>
</tr>
<table>
If i write like that is only assigned to particular row but i want it for whole page. If I write <asp:silverlight> control after form tag then the silverlight content is assigned above the table and the table data seperated from silverlight content.
Please see the below link to drag and drop videos but that drag and drop videos is not working outside that row only within that row.
http://219.91.199.132/silverl/home.aspx
Can you please guide me how to user .XAP file to whole aspx page.

Thanks in Advance
Pavani

Re: Use .XAP file in ASP.Net Website

Mark Salsbery2-Apr-09 5:21

Mark Salsbery

2-Apr-09 5:21

pavanip wrote:
Can you please guide me how to user .XAP file to whole aspx page.

Do you want the Silverlight plugin to take up the entire browser window or
a cell in an HTML table?

Regardless, this isn't really a Silverlight question - you may get better response
on the Web Development board for HTML questions.

Mark

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

WPF codes to play a RTSP multicast or unicast video stream

jklanka1-Apr-09 21:48

jklanka

1-Apr-09 21:48

Hi

Are there any code sample for playing a rtsp or udp stream. I have live555 rtsp streaming server setup in my pc and like to play the stream using a wpf code sample using vs2008.

Will this support. How can I do this.

Please help

Keep element in canvas when dragging it

Pauwels Bart1-Apr-09 20:19

Pauwels Bart

1-Apr-09 20:19

Hi,

I use adorners to move elements in a canvas but I want that those elements stay in the canvas bounderies. So when I drag an element over one of the bounderies, it should stay against that boundery and not cross it.

Now I only check the top and left bounderies with the Canvas.GetLeft and Canvas.GetTop. The width and height of the canvas is variable. Anybody has an idea how I can prevent the elements to cross the right and bottom bounderies?

Thx

Re: Keep element in canvas when dragging it

ABitSmart1-Apr-09 21:17

ABitSmart

1-Apr-09 21:17

Have you tried ClipToBounds[^] ?

How are you implementing the drag/drop ?

Re: Keep element in canvas when dragging it

Pauwels Bart1-Apr-09 23:30

Pauwels Bart

1-Apr-09 23:30

I hadn't tried it before but ClipToBounds doesn't work.

When I add a new UIElement (like an image) to the Canvas, I adorn it. That adorner adds a Thumb to each side of the UIElement and that thumbs handles the drag function.

// Handler for moving.
private void HandleMove(object sender, DragDeltaEventArgs args)
{
    // Horizontal position.
    if (StanagCanvas.GetLeft(this.AdornedElement) + args.HorizontalChange < 0)
    {
        // Crossing left boundary.
        StanagCanvas.SetLeft(this.AdornedElement, 0);
    }
    else if (StanagCanvas.GetRight(this.AdornedElement) - args.HorizontalChange < 0)
    {
        // Crossing right boundary.
        StanagCanvas.SetRight(this.AdornedElement, 0);
    }
    else
    {
        StanagCanvas.SetLeft(this.AdornedElement, StanagCanvas.GetLeft(this.AdornedElement) + args.HorizontalChange);
    }

    // Vertical position.
    if (StanagCanvas.GetTop(this.AdornedElement) + args.VerticalChange < 0)
    {
        // Crossing top boundary.
        StanagCanvas.SetTop(this.AdornedElement, 0);
    }
    else if (StanagCanvas.GetBottom(this.AdornedElement) - args.VerticalChange < 0)
    {
        // Crossing bottom boundary.
        StanagCanvas.SetBottom(this.AdornedElement, 0);
    }
    else
    {
        StanagCanvas.SetTop(this.AdornedElement, StanagCanvas.GetTop(this.AdornedElement) + args.VerticalChange);
    }
}

(StanagCanvas derives from Canvas)

Offcourse the Right and Bottom properties don't work because I allready use the Left and Top properties. The element doesn't cross the left and top boundery of the canvas.

I hope this is enough information.

Re: Keep element in canvas when dragging it

ABitSmart2-Apr-09 5:05

ABitSmart

2-Apr-09 5:05

You could do it without the Right/Top properties. Something like,

else if ( (StanagCanvas.GetLeft(this.AdornedElement) + this.AdornedElement.Width + args.HorizontalChange) > yourCanvas.Width )
{
    // Crossing right boundary.
    StanagCanvas.SetLeft(this.AdornedElement, yourCanvas.Width - this.AdornedElement.Width);
}

Re: Keep element in canvas when dragging it

Pauwels Bart2-Apr-09 7:22

Pauwels Bart

2-Apr-09 7:22

I tried that already. The problem with that is that I don't have a reference to the canvas so I can't get the width of it. Or am I totally wrong Confused | :confused:

(It is weekend now for me so I can't recheck it but in a few days my mind is clear again and I can get a fresh start)

That adorner class (derives from Adorner like you know) is separated from my canvas class. I only call it when initializing a new UIElement on the canvas to adorn that element (and it stays adorned until I close the program or the UIElement is deleted). I guess that after I have added the adorner, that adorner only knows his element (this.AdornedElement) and nothing else. The actions I take from then with that adorner, can only affect Attached Properties (Like SetLeft, ... + I have made some extra attached properties in my Canvas class).

I can be totally wrong. If you want to know, I'm only programming for a few months without a proper eduction for it (I had programming on school but only basics). I'm learning it all myself (C# and WPF) and I need to make program for a company where I'm kind of an intern (1 year internship in a foreign country after getting my degree to get some experience before going to work in my own country).

Hope you can say that I'm wrong and it is that simple (but I missed something) Poke tongue | ;-P

Re: Keep element in canvas when dragging it [modified]

ABitSmart2-Apr-09 7:50

ABitSmart

2-Apr-09 7:50

Pauwels Bart wrote:
private void HandleMove(object sender, DragDeltaEventArgs args)

Who is the sender ? Is it the element in canvas ? If yes, you can do something like this,

FrameworkElement parent = ((sender as FrameworkElement).Parent as FrameworkElement;
//((sender as FrameworkElement).Parent should give you the Canvas

EDIT: forgot to mention, you can then get the Width parent.Width

modified on Thursday, April 2, 2009 2:15 PM

Re: Keep element in canvas when dragging it

Pauwels Bart2-Apr-09 8:45

Pauwels Bart

2-Apr-09 8:45

That looks like a good answer Big Grin | :-D

I have tried to call the parent with the sender but that didn't work. That was probably because I didn't parse it as a FrameworkElement or something like that.

I wouldn't know what to do if this site and forum didn't exists. Thx very much for the help. Thumbs Up | :thumbsup:

I will try it and let you know if it worked!

Re: Keep element in canvas when dragging it

Pauwels Bart4-Apr-09 18:32

Pauwels Bart

4-Apr-09 18:32

Ok, the sender was not the element in the canvas but the thumb. Luckely I can get the element with "this.AdornedElement" (standard build-in adorner function to get the adorned element).

So, the solution was:

  // Handler for moving.
  private void HandleMove(object sender, DragDeltaEventArgs args)
  {
      FrameworkElement element = this.AdornedElement as FrameworkElement;
      StanagCanvas stanagCanvas = element.Parent as StanagCanvas;

      // Horizontal position.
      if (StanagCanvas.GetLeft(element) + args.HorizontalChange < 0)
      {
          // Crossing left boundary.
          StanagCanvas.SetLeft(element, 0);
      }
      else if (StanagCanvas.GetLeft(element) + element.Width + args.HorizontalChange > stanagCanvas.Width)
      {
          // Crossing right boundary.
          StanagCanvas.SetLeft(element, stanagCanvas.Width - element.Width);
      }
      else
      {
          StanagCanvas.SetLeft(element, StanagCanvas.GetLeft(element) + args.HorizontalChange);
      }

      // Vertical position.
      if (StanagCanvas.GetTop(element) + args.VerticalChange < 0)
      {
          // Crossing top boundary.
          StanagCanvas.SetTop(element, 0);
      }
      else if (StanagCanvas.GetTop(element) + element.Height + args.VerticalChange > stanagCanvas.Height)
      {
          // Crossing bottom boundary.
          StanagCanvas.SetBottom(element, stanagCanvas.Height - element.Height);
      }
      else
      {
          StanagCanvas.SetTop(element, StanagCanvas.GetTop(element) + args.VerticalChange);
      }
}

I just made it to difficult and overlooked this simple sollution! Now the element stays within the bounderies of the canvas.

thx ABitSmart

Re: Keep element in canvas when dragging it

ABitSmart4-Apr-09 19:42

ABitSmart

4-Apr-09 19:42

That's great Smile | :)

Looking at your code, when it crosses the bottom boundary, you are setting the Bottom. Shouldn't it be SetTop ?

Re: Keep element in canvas when dragging it

Pauwels Bart4-Apr-09 19:54

Pauwels Bart

4-Apr-09 19:54

How could I have missed that!

WPF or Windows Forms

dfreeser1-Apr-09 12:00

dfreeser

1-Apr-09 12:00

Any insight for a small civil engineering program.

It will have 4 forms(excluding open/close dialog boxes) and will run in C#:
Main - menubar, tabstrip, Datagrid and a couple buttons
Chart Form - Graphics form to display a generated flow chart
Project form - basically a glorified dialog box for project info
Report Form - basically just a .doc file holder

If I go the WPF route I would like to produce my own style (kinda like Vista but not so heavy).

I don't have much experience with WPF besides tutorials and articles and I just want some personal experiences to help me make an informed decision.

Re: WPF or Windows Forms

Pete O'Hanlon1-Apr-09 22:03

Pete O'Hanlon

1-Apr-09 22:03

This is a fairly straightforward application, and shouldn't present you with too much trouble. If you adopt MVVM as your main design pattern, you'll find that it's easy to debug and test because you'll test your business logic in isolation from the way that it's presented.

You'll find it easier to code up a flow chart in WPF than you would in WinForms - so much of the graphics subsystem has been designed to make it easier to use (once you have experience). I would state though, that if you have experience in WinForms and none in WPF then you've got a steep learning curve ahead of you, and I'd get my feet wet on a couple of small applications first before tackling this one, so you might be better off using WinForms if that's what you're used to. If you don't have extensive experience in WinForms, I'd definitely recommend taking the plunge into WPF. Actually, I'd recommend it anyway, but I am a WPF nut.

"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: WPF or Windows Forms

RugbyLeague2-Apr-09 5:40

RugbyLeague

2-Apr-09 5:40

If you have swear jar in your office go with WinForms - otherwise WPF is worth a go but be prepared to climb a mountain

Re: WPF or Windows Forms

dfreeser2-Apr-09 5:56

dfreeser

2-Apr-09 5:56

Thank for the responses. Ive been messing around with WPF and I feel its the way I'm going to go. I just don't like stepping into aging standards. WPF is is! I'm sure I'll be back with plenty of questions. Thanks.

Set style definition dynamically

salon1-Apr-09 3:46

salon

1-Apr-09 3:46

I have abutton control, there are some style properties which can be set in App.xaml like this

Style x:Key="ButtonStyle" TargetType="Button">
                <Setter Property="HorizontalAlignment" Value="Right"/>
                <Setter Property="Width" Value="50"/>
                <Setter Property="Height" Value="20"/>
                <Setter Property="VerticalAlignment" Value="Bottom"/>
                <Setter Property="Foreground" Value="Red"/>
            </Style>

and give in button control as

Style="{StaticResource ButtonStyle}"

or in xaml.cs file as

btnTest.Style = (Style)(Application.Current.Resources["ButtonStyle"]);

But I want to generate this style dynamically and save it in a string and extract the style object from that string and apply it to the Button control.
In other words I want to take style from a string not from App.xaml.
Is it possible in Silverlight 2.0?

Thanks in advance,

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