WPF Discussion Boards

ABitSmart30-Jun-09 21:37

ABitSmart

30-Jun-09 21:37

But you have not bound any property of the collection to the ListBox item. How do you expect the collection to change?

Member 367392230-Jun-09 22:45

Member 3673922

30-Jun-09 22:45

Hi,
We are doing the binding as below:

<eclp:EclpList Name="eclpList" Margin="5" Height="Auto" Width="100" ItemsSource="{Binding}" DisplayMemberPath="Name" SelectionChanged="cmb_SelectionChanged" />

See if this can give any ideas..

Thnx
Ritesh

Member 367392230-Jun-09 21:05

Member 3673922

30-Jun-09 21:05

Actually TextBox will be hidden & will be visible on DoubleClick. At that time, I want the content of ListBox item to be modified in Textbox & after lostfocus of TextBox, it should update ListBox Item & again becomes hidden.
This works for unbound list but for bound list, I need your suggestions.

ABitSmart30-Jun-09 21:35

ABitSmart

30-Jun-09 21:35

You should try something like this Link[^]

Databinding textbox to double

Member 367392230-Jun-09 20:56

Member 3673922

30-Jun-09 20:56

Hi,
I am facing the similar kind of issue. But I am actually changing the controTemplate of ListBoxItem itself with ContentPresenter & a TextBox.
I did the same thing as per the posted contents but it did not work with the binded list. I have given something like below in the ControlTemplate of ListBox Item.

<ContentPresenter x:Name="displayTextBlock" Grid.Column="0" Grid.ColumnSpan="1" Margin="11,5,11,5" HorizontalAlignment="Stretch"/>

<TextBox x:Name="listItemTextBox" Padding="11,5,11,5" HorizontalAlignment="Stretch"
                                                                                          Background="Transparent"
                                                                                          Grid.Column="0"
                                                                                          Visibility="Collapsed" Grid.ColumnSpan="1"
                                                                                       Text="{Binding Path=Content, ElementName=displayTextBlock, Mode=TwoWay, UpdateSourceTrigger=LostFocus}" />

Kindly suggest.

Thnx,
Ritesh

ErikZ24-Mar-09 2:46

ErikZ

24-Mar-09 2:46

Hi,

I'm trying WPF and databinding....and I've run into a simple(I suppose) problem. Hopefully someone cam point me in the right direction.
If I declare a double like this i window.resources:

<System:Double x:Key="myValue">10</System:Double>

How can I bind a textboxs textproperty to it?

Pete O'Hanlon24-Mar-09 3:56

Pete O'Hanlon

24-Mar-09 3:56

Here's a sample:

<Page
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  xmlns:System="clr-namespace:System;assembly=mscorlib"
>
  <Page.Resources>
    <System:Double x:Key="myValue">10</System:Double>
  </Page.Resources>
  <Grid>  
    <TextBox Text="{Binding Source={StaticResource myValue}, Mode=OneWay}" />
  </Grid>
</Page>

"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

ErikZ24-Mar-09 4:01

ErikZ

24-Mar-09 4:01

Thank you very much, but how about TwoWay binding? Why doesnt that work? If I create a simple class and have a property of type double and bind to that property it works fine.

Pete O'Hanlon24-Mar-09 4:18

Pete O'Hanlon

24-Mar-09 4:18

It won't work in this sample because you don't have a variable backer to bind into - it's a StaticResource. If you had a variable the two way binding would work.

"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

What is the Exact use of WF???

ErikZ24-Mar-09 20:06

ErikZ

24-Mar-09 20:06

Hmmmm....I've probably missunderstood something here.... Smile | :)

I thought that I declared a variable, but it looks lite I can treat these declarations as "const"s....

How about DynamicResource, can I use that instead?

silverlight and dlls

VCsamir24-Mar-09 2:24

VCsamir

24-Mar-09 2:24

hi all,

with Silver3.0 can we use managed VC++ Dll or C# Dll as we can can use in WPF
using HndHost??

Thanks in Advance

Samir Satardekar

Re: silverlight and dlls

Mark Salsbery24-Mar-09 6:01

Mark Salsbery

24-Mar-09 6:01

The requirements will be the same - you can use any .NET assembly
that targets the Silverlight .NET framework library.

Mark

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

Re: silverlight and dlls

VCsamir30-Mar-09 0:49

VCsamir

30-Mar-09 0:49

Hi Sir Mark,
I have created a Dll using VC++ and build it with clr option. i add the following lines
to access it in my C# forms
namespace a
{
public ref class b
{
public: void funccall()
{
//call to class
}
}
};

can i use this dll in my silverlight project??

i have tried the convert .net assembly to silverlight Assembly
Converting .NET Assemblies to Silverlight Assemblies[^]

This does work for VC# dlls but fails for VC++

Thnks in Advance..

Regards
Samir

Re: silverlight and dlls

Mark Salsbery30-Mar-09 6:06

Mark Salsbery

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

Mark Salsbery

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