Re: Binding to a property of the page in XAML - WPF Discussion Boards

How to save image in a folder in silver light

Nekkantidivya7-Aug-09 19:38

7-Aug-09 19:38

Hi,

I am working on a silver light projrct.In this I need to upload an image and save it in a folder in the server(i.e., in a folder in the application). I want this funtion to be done on button click. So I cannot use file upload control. For getting the images I used open dialog. Now I have to sae the image.

If anyone have any idea to save the image to folder please reply me.

Thanks in advance.

Re: How to save image in a folder in silver light

Michael Sync8-Aug-09 6:19

Michael Sync

8-Aug-09 6:19

If you are selecting a file by using OpenFileDialog then you will get the stream, right?

So, you can do http-post this stream to your web service.

Please check this example:

Silverlight File Upload[^]

Note: It's not possible to do without using any web service.

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

Microsoft MVP (Silverlight), WPF/Silverlight Insiders

Re: How to save image in a folder in silver light

Jeremy Likness13-Aug-09 5:34

Jeremy Likness

13-Aug-09 5:34

You'll need to wire in a WCF service at the server side. The service would take the file information and byte array, then store it locally.

In your Silverlight application, you'll reference the service, then take your image data and send it.

To get to the image data, most likely you'll send it into a WriteableBitmap and then parse the Pixels array ... you can either format it on the Silverlight side and send it down, or send it raw and handle formatting on the server. Perhaps simple compression in the client, then uncompress and format into JPEG/PNG/etc on the server would be fine.

Jeremy Likness
Latest Article: Whats in Your Collection? Part 1 of 3: Interfaces
Blog: C#er : IMage

Binding to a property of the page in XAML

gantww7-Aug-09 15:01

gantww

7-Aug-09 15:01

Hello all,
I have a small bit of silverlight code that pulls some data down from a silverlight-enabled web service and binds to it. I'm currently doing the bulk of the work in the constructor. Once the data is down, I bind to it in a couple of places and it is also accessible via a property on the code behind. However, I also have some controls that need to bind to this property in order to provide a list of values on screen. Is there a way to do this with the XAML binding syntax, or do I need to do this in the code behind?

Thanks,
Will

Re: Binding to a property of the page in XAML

Michael Sync8-Aug-09 6:15

Michael Sync

8-Aug-09 6:15

What about this?

For example:

<UserControl ...
   xmlns:model=".........."
>
<UserControl.DataContext>
<model:YourClass/>
<UserControl.DataContext>

<ListBox ItemSource="{Binding YourPropertyOfYourClass}" />

</UserControl>

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

Microsoft MVP (Silverlight), WPF/Silverlight Insiders

Re: Binding to a property of the page in XAML

gantww10-Aug-09 16:48

gantww

10-Aug-09 16:48

Sorry about the slow response, it took longer to recover from vacation than I thought (I had to wait until I was off to have time to start learning silverlight).

Your suggestion worked, so that means I don't understand the whole DataContext thing like I thought I did. I thought the control got it from whatever control contained it, but that is apparently not the case. Strange.

Anyway, thanks for the help, I really appreciate it.

Re: Binding to a property of the page in XAML

gantww10-Aug-09 17:05

gantww

10-Aug-09 17:05

Ugh. I told you wrong. I forgot I had put some hackish stuff in the code behind that set the ItemsSource.

Here's roughly what I have. It's buried down in one cell of a datagrid that is in a cell of another datagrid on the page.
<ComboBox x:Name="cboTextColor" SelectedItem="{Binding Color}" Grid.Row="2" Grid.Column="1">

<ComboBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<Rectangle Fill="{Binding Color}" Width="25"/>
<TextBlock Text="{Binding ColorName}"/>
</StackPanel>
</DataTemplate>
</ComboBox.ItemTemplate>
</ComboBox>

There is a regular .NET property on the code behind page called ProductColors. It is currently an ObservableCollection<colorentry> (where ColorEntry has an id, a color code, and a description). It seems like I should be able to bind to it by doing something like:
<ComboBox ItemsSource={Binding ProductColors}" />
However, even though the list has two items in it, nothing shows in the drop down.

Does this need to be a dependency property or something for binding to work?

Re: Binding to a property of the page in XAML

Mark Salsbery11-Aug-09 5:53

Mark Salsbery

11-Aug-09 5:53

gantww wrote:
It seems like I should be able to bind to it by doing something like:
<combobox itemssource="{Binding" productcolors}"="">

That depends on what "ProductColors" is. Assuming it's a collection of
ColorEntry objects, you still need a data context set somewhere so the system
knows where to find the ProductColors object to bind to.

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

Bind variable number of columns in ListView

Jack Valmadre7-Aug-09 12:01

Jack Valmadre

7-Aug-09 12:01

Hi
I'm creating a program to manage a competition which has several rounds. I have a class PreliminaryCompetition which contains a list of Teams and a list of Rounds, each Round containing a Result for each Team. I'd like to display the results of all rounds in a ListView control which has two columns to display team name and school name, followed by N columns to display results from N rounds. Is it possible to do this automagically with WPF binding? What do I have to implement to achieve this? (apologies - I'm a WPF noob)

Thanks

Jack

How awesome would it be if...

Mike Marynowski7-Aug-09 6:40

Mike Marynowski

7-Aug-09 6:40

...someone wrote a Flash-based Silverlight engine. I'm sure that's not what Microsoft wants, but it would be instant ubiquity for Silverlight.

Flash has that fancy new native C converter, so I don't see performance being a huuuge issue. Considering MoonLight is open source, a ton of ground work has already been laid down.

Anybody up for a challenge? haha