Re: What is the Exact use of WF??? - WPF Discussion Boards

What is the Exact use of WF???

30-Mar-09 6:06

In theory you could use a C++/CLI DLL in Silverlight but you'd
have to do the following:

Compile with /clr:pure
Eliminate all references to .NET framework assemblies
Only reference Silverlight framework assemblies
Eliminate any use of the CRT (C runtime)

At that point you essentially have C# so you're not getting any benefit from C++.

Even if you do all of the above, I've heard it still won't work properly
because the MSIL produced by the C++ compiler has some incompatibility with
the Silverlight "runtime".

Give it a try if you want, but it's currently not supported.

Just use C# Smile | :)

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

Narendra Reddy Vajrala24-Mar-09 2:18

Narendra Reddy Vajrala

24-Mar-09 2:18

Hi,
I want to know the Exact use and purpose of Windows Workflow Foundation?
i gone through many articles, in that they explain their own examples only but no one describe about WF and WF uses.

Please Explain Purpose of WF.

Please dont give links, In that they explain with an example only.

Thanks In Advance.
--Naren
Wink | ;)

#realJSOP24-Mar-09 2:58

#realJSOP

24-Mar-09 2:58

Like its bastard cousin (WPF), it's main purpose is to slow development to a crawl while you search in vain for answers to your inevitable questions. If and when you ever get your application finished, its secondary purpose kicks in, obfuscating the programs intended purpose and making maintenance more difficult because Microsoft abandoned the framework soon after introducing it (like they're doing to LINQ, and soon, WPF).

"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

Kevin McFarlane24-Mar-09 5:30

Kevin McFarlane

24-Mar-09 5:30

John Simmons / outlaw programmer wrote:
because Microsoft abandoned the framework soon after introducing it (like they're doing to LINQ, and soon, WPF)

Where did you read that?

Kevin

#realJSOP24-Mar-09 6:14

#realJSOP

24-Mar-09 6:14

I read a blog somewhere today that said Microsoft was pushing silverlight and would soon abandon WPF.

Don't ask me where, because I don't recall (and thought it was kind of absurd myself).

Mark Salsbery24-Mar-09 6:29

24-Mar-09 6:29

I know I don't have to state this, but I will anyway -
Silverlight can't replace WPF - they aren't even the same "technologies".

So your frustrations with learning a new framework (which I bet you'll soon
find much more flexible than Windows Forms) has led you to rehashing garbage
you read on the internet? Laugh | :laugh:

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

#realJSOP24-Mar-09 9:51

#realJSOP

24-Mar-09 9:51

I tend to lash out at any moving object when I'm pissed off. Smile | :)

Of course, I know that silverlight can't replace WPF, but we all know about Microsoft's tendency toward platform/framework/paradigm abandonment, so I figured I'd ping on it.

Kevin McFarlane24-Mar-09 6:49

Kevin McFarlane

24-Mar-09 6:49

Well, they almsot certainly won't be abandoning LINQ anytime soon. It's part of the core languages. Maybe you're thinking of Linq to SQL vs. Linq to Entities?

As for WF, it is being pushed out to more and more products. Whether anyone is using it or not is another matter. Smile | :)

However, WF and WCF are becoming more intertwined and the new Oslo modelling platform is heavy on WF. My impression is that WF is intended to be analogous to WPF/Silverlight in the following way.

WPF/Silverlight is intended to allow easier partition of work between developer and designer.
WF is intended to allow easier partition of work between developer and business analyst.

There is an Oslo whitepaper that provides an illustration of this scenario.

Kevin

Kevin McFarlane24-Mar-09 7:08

Kevin McFarlane

24-Mar-09 7:08

This describes one scenario...

Creating Modern Applications: Workflows, Services, and Models [^]

You may be none the wiser but at least the diagrams are pretty. Laugh | :laugh:

Kevin

snowwolfchicago27-Mar-09 13:11

snowwolfchicago

27-Mar-09 13:11

Hi Naren,

WF deals with two kinds of workflow models:
1. Sequential workflow
2. State machine workflow

The main benefit is to visualize your design, because in WF, your workflow diagram (either flowchart or state diagram) is your code. It's easier to change and to document. Every time when you change your diagram, your code will be changed automatically. This way, you can focus on important logical design without having to deal with detailed issues.

Hope this helps a little bit.

Jie

Narendra Reddy Vajrala30-Mar-09 5:39

Narendra Reddy Vajrala

30-Mar-09 5:39

hi,

i added a windows application to my WF solution. that application i already done with c#.net.
now i have to do the same again in WF? or no need?
because we have to show flow through win forms also.

Thanks & Regards
--Naren
Blush | :O

WPF Setup

GomathiR24-Mar-09 1:21

GomathiR

24-Mar-09 1:21

Hi,
I created one wpf application and published it. When i run it from another system thar doesn't have Dotnet framework installed, it show me an error(Prerequisite- dotnet framework 3.0 &Windows installer). Any idea regarding this.

Gomathi R

Pete O'Hanlon24-Mar-09 1:28

Pete O'Hanlon

24-Mar-09 1:28

You could deploy it using ClickOnce, which would download the relevant framework, or you could add the framework in as a required resource into the installer for your project, or you could supply the link for the user to download and install the framework.

"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

GomathiR24-Mar-09 19:18

GomathiR

24-Mar-09 19:18

Hi,
I selected framework as a required resource. But even then the error appears.I created setup. but if we run it using the setup the UI gets collapsed.

Gomathi R

Pete O'Hanlon25-Mar-09 22:43

Pete O'Hanlon

25-Mar-09 22:43

GomathiR wrote:
if we run it using the setup the UI gets collapsed.

I'm not sure what that means. If you're having trouble with the deployment, use ClickOnce and let the user download your application from a central server.

"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

Michael Bookatz24-Mar-09 5:32

Michael Bookatz

24-Mar-09 5:32

Install .net - I mean if it's a .net application then you're going to need .net installed

ramz_g25-Mar-09 20:33

ramz_g

25-Mar-09 20:33

To run applications developed in WPF, u need to install the .NET framework which is available for download. U must download and install it on the target computer to make your application run.

problem in scroll

amer shammout24-Mar-09 0:40

amer shammout

24-Mar-09 0:40

I create a control in wpf that use treeview and pubulate node by code
Now :
the problem is when I drag the scroll it doesn't work but it work when i use the mouse scroll or when use the arrows of scroll

XmlWriter

Ranger4923-Mar-09 22:28

23-Mar-09 22:28

using System;<br />
using System.Text;<br />
using System.Collections.Generic;<br />
using System.IO;<br />
using System.Net;<br />
using System.Windows;<br />
using System.Windows.Controls;<br />
using System.Windows.Documents;<br />
using System.Windows.Input;<br />
using System.Windows.Media;<br />
using System.Windows.Media.Animation;<br />
using System.Windows.Shapes;<br />
using System.Xml;<br />
using System.Xml.Linq;<br />
 <br />
<br />
namespace SilverlightApplication1<br />
{<br />
      public partial class Page : UserControl<br />
      {<br />
            public Page()<br />
            {<br />
                 InitializeComponent();<br />
<br />
                  StringBuilder sb = new StringBuilder();<br />
                  XmlWriterSettings xws = new XmlWriterSettings();<br />
                  xws.OmitXmlDeclaration = true;<br />
                  xws.Indent = true;<br />
<br />
                   using (XmlWriter xw = XmlWriter.Create(sb, xws))<br />
                  {<br />
                        XDocument xd = new XDocument(

I tried with this code to wite an XML file to the server (local host). But that VWDExpress doesn't see the XmlWriterSettings and XmlWriter. I think I am using the wrong references. Can anybody tell me in what reference XmlWriterSettings and XmlWriter can be found?

Thanks,
Ranger.

PS, If anybody can get me a sample project I would appreciate it.

Ranger4923-Mar-09 23:42

23-Mar-09 23:42

I just discovered that I hadn't included a using System.Xml; line in the header.

But where do you specify the filename of the xml-file you are trying to save?

Ranger.

Ranger4924-Mar-09 4:02

24-Mar-09 4:02

using System;<br />
using System.Text;<br />
using System.Collections.Generic;<br />
using System.Linq;<br />
using System.Xml.Linq;<br />
using System.Xml;<br />
using System.Net;<br />
using System.Windows;<br />
using System.Windows.Controls;<br />
using System.Windows.Documents;<br />
using System.Windows.Input;<br />
using System.Windows.Media;<br />
using System.Windows.Media.Animation;<br />
using System.Windows.Shapes;<br />
using System.IO;<br />
<br />
namespace LinqToXmlSilverlight090322<br />
{<br />
    public partial class Page : UserControl<br />
    {<br />
        public Page()<br />
        {<br />
            InitializeComponent();<br />
<br />
            StringBuilder sb = new StringBuilder("test.xml", 10);<br />
            XmlWriterSettings xws = new XmlWriterSettings();<br />
            xws.OmitXmlDeclaration = true;<br />
            xws.Indent = true;<br />
<br />
            using (XmlWriter xw = XmlWriter.Create(sb, xws))<br />
            {<br />
<br />
                XDocument xd = new XDocument(<br />
                    new XElement("MyFractals",<br />
                        new XElement("first",<br />
                            new XAttribute("range", "1,5"),<br />
                            new XAttribute("startRe", "1,0"),<br />
                            new XAttribute("startIm", "-0,7"),<br />
                            new XAttribute("startColor", "100")<br />
                    ),<br />
                    new XElement("second",<br />
                            new XAttribute("range", "0,5"),<br />
                            new XAttribute("startRe", "0,105"),<br />
                            new XAttribute("startIm", "-0,6"),<br />
                            new XAttribute("startColor", "160")<br />
                    ),<br />
                    new XElement("third",<br />
                            new XAttribute("range", "0,75"),<br />
                            new XAttribute("startRe", "0,5"),<br />
                            new XAttribute("startIm", "0,204"),<br />
                            new XAttribute("startColor", "60")<br />
                            )<br />
                    )<br />
                );<br />
<br />
                xd.Save(xw);<br />
            }<br />
<br />
            using (XmlReader reader = XmlReader.Create(new StringReader(sb.ToString())))<br />
            {<br />
                XDocument xd2 = XDocument.Load(reader);<br />
                XElement rt = xd2.Element(XName.Get("MyFractals"));<br />
                        var xyz = from e in rt.Elements()<br />
                        select e;<br />
                //foreach (XElement x in xyz)<br />
            }<br />
        }<br />
    }<br />
}

Why doesn't this work? There is no test.xml file created and when the program tries to open the xml file (which I manually placed) I get an error message saying 'line 1 character 1 illegal character'.
Is there anybody who could tell me how to get this to work?
Thanks,
Ranger.

Mark Salsbery24-Mar-09 6:17

24-Mar-09 6:17

Ranger49 wrote:
There is no test.xml file created

The XmlWriter you are using should be writing the XML to the StringBuilder,
not to a file.

In Silverlight 2, the only access you have to the user's local hard disk
is using Isolated Storage:

How to: Save XMLWriter Content to Isolated Storage[^]

Ranger49 wrote:
I get an error message saying 'line 1 character 1 illegal character'.

Probably because your StringBuilder has "test.xml" at the beginning of its contents,
which isn't valid XML.

Mark

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

Ranger4924-Mar-09 6:22

24-Mar-09 6:22

Ok, I see...

What I would want to do is write an XML file with data to the server where the Silverlight application is situated.

Is this possible at all? Or is the only option Isolated Storage on the computer of the person who is viewing the Silverlight application?

Thanks!

Ranger.

Mark Salsbery24-Mar-09 6:34

24-Mar-09 6:34

Silverlight runs entirely on the client side.

To write to a server, you'll need to send it to the server.

Here's some info on ways to do that:

Silverlight Networking and Communication[^]

Mark

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

Ranger4924-Mar-09 6:41