Silverlight with Ruby on Rails? An unholy union? - WPF Discussion Boards

Pete O'Hanlon24-Jan-11 22:09

24-Jan-11 22:09

Ah yes. One of the more unhelpful messages. You'll need to use WCF tracing to identify what's really going on. You'll need to add the following to your config file:

<system.serviceModel>
  <diagnostics>
    <messageLogging logEntireMessage="true" logMalformedMessages="true" logMessagesAtServiceLevel="true" logMessagesAtTransportLevel="true" />
  </diagnostics>
  <serviceHostingEnvironment aspNetCompatibilityEnabled="true"/>
</system.serviceModel>
<system.diagnostics>
  <sources>
    <source name="System.ServiceModel" switchValue="Verbose, ActivityTracing">
      <listeners>
        <add type="System.Diagnostics.DefaultTraceListener" name="Default">
          <filter type="" />
        </add>
        <add type="System.Diagnostics.ConsoleTraceListener" name="console">
          <filter type="" />
        </add>
        <add name="ServiceModelTraceListener">
          <filter type="" />
        </add>
      </listeners>
    </source>
    <source name="System.ServiceModel.MessageLogging" switchValue="Verbose, ActivityTracing">
      <listeners>
        <add type="System.Diagnostics.DefaultTraceListener" name="Default">
          <filter type="" />
        </add>
        <add type="System.Diagnostics.ConsoleTraceListener" name="console">
          <filter type="" />
        </add>
        <add name="ServiceModelMessageLoggingListener">
          <filter type="" />
        </add>
      </listeners>
  </source>
</sources>
<sharedListeners>
  <add initializeData="C:\logging\wcftracesvc.log"
    type="System.Diagnostics.XmlWriterTraceListener, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"
    name="ServiceModelTraceListener" traceOutputOptions="Timestamp">
    <filter type="" />
  </add>
  <add initializeData="C:\logging\wcfmsgsvc.log"
    type="System.Diagnostics.XmlWriterTraceListener, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"
    name="ServiceModelMessageLoggingListener" traceOutputOptions="Timestamp">
    <filter type="" />
  </add>
</sharedListeners>
<trace autoflush="true" />
</system.diagnostics>

Santhosh Sebastian Mattathil

Santhosh Sebastian Mattathil24-Jan-11 22:12

24-Jan-11 22:12

Hi Pete..
Thanks again.. Smile | :)

But one other query : does the SL datagrid has any limit on its maximum record size..

Santhosh

Pete O'Hanlon24-Jan-11 23:46

24-Jan-11 23:46

No. The only limit you'll run into with the datagrid is memory.

I'm not a stalker, I just know things. Oh by the way, you're out of milk.

Forgive your enemies - it messes with their heads

Abhinav S25-Jan-11 18:27

Abhinav S

25-Jan-11 18:27

No the SL Datagrid does not have a maximum limit.

The funniest thing about this particular signature is that by the time you realise it doesn't say anything it's too late to stop reading it.

My latest tip/trick

Ibrahim.Poonawala1-Feb-11 4:35

Ibrahim.Poonawala

1-Feb-11 4:35

WHICH ERROR?

Pete O'Hanlon1-Feb-11 4:36

1-Feb-11 4:36

This[^] one, and please don't shout.

I'm not a stalker, I just know things. Oh by the way, you're out of milk.

Forgive your enemies - it messes with their heads

Silverlight with Ruby on Rails? An unholy union?

RB@Emphasys23-Jan-11 20:18

RB@Emphasys

23-Jan-11 20:18

Hey Guys,

I've written a few silverlight apps thus far primarily using RIA services and the entity framework. We're currently looking at marrying some of our ruby on rails applications possibly through exposed web services and comsuming those services with silverlight. I've found some examples mainly using iron ruby which seems to be shelved for the time being. My question is, has anyone tried this? Is it possible to consume ruby on rails services via silverlight possibly just through consuming a rest service? I really appreciate your thoughts and opinions as we're evaluating options.

Regards,
Ryan

MVVM Model Sample [modified]

Eric Goedhart22-Jan-11 4:05

Eric Goedhart

22-Jan-11 4:05

Hi,

I'm not sure if this is a repost but since I could't find a reference to this video I found and replicated to see if it worked (it did) I want to post a link to this MVVM in WPF and Silverlight
sample (8 video sessions in total) that I think can be of great help for those who don't know this sample and are trying to get MVVM working.
When recreating this sample (source code is available for download) it's important to think about the using directives since it's not alway's clear that these are added while watching the video.

[Link]

With friendly greetings, Smile | :)

Eric Goedhart

modified on Saturday, January 22, 2011 10:27 AM

Re: MVVM Model Sample

Abhinav S23-Jan-11 18:51

Abhinav S

23-Jan-11 18:51

It might be more helpful if you post this as a tip/trick rather than in the question answer forum.
It will get lost here.

The funniest thing about this particular signature is that by the time you realise it doesn't say anything it's too late to stop reading it.

My latest tip/trick

Attempted to read or write protected memory. This is often an indication that other memory is corrupt.

εїзεїзεїз21-Jan-11 20:21

εїзεїзεїз

21-Jan-11 20:21

Thanks in advance.

Getting this Error in Visual Studio 2008 Silver Light Application

Attempted to read or write protected memory. This is often an indication that other memory is corrupt.

when Clicking on the Page of the Project any suggestion/help will be appreciated

SOFTDEV

Luck in life always exists in the form of an abstract class that cannot be instantiated directly and needs to be inherited by hard work and dedication.

Re: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.

dasblinkenlight23-Jan-11 8:21

dasblinkenlight

23-Jan-11 8:21

This error appeared randomly back when I was using VS 2008, but now that we switched to VS 2010 the problem never re-appeared.

This is nearly certainly an internal exception of VS 2008, so it has nothing to do with what you are doing. Some people report this error[^] when there is mismatch in Silverlight versions (3 vs. 4). Some people report fixing a similar problem by resetting import/export settings[^], but I don't know if it is going to work for you.

RadioButton, GroupName, and Guid

Frank W. Wu21-Jan-11 4:56

Frank W. Wu

21-Jan-11 4:56

I created a list of RadioButtons in a template. Multiple instances will be created for the template. Therefore the GroupName of the RadioButton can’t be the same for each instance. My approach is to use Guid.NewGuid in XAML. However, I can’t workout the syntax of it. I found a post about it but it doesn’t work. Any idea? Or any other idea to make GroupName works for multiple instances? Thanks in Advance!

Iterate DataGrid in Silverlight web application.

Sunil G 321-Jan-11 0:10

Sunil G 3

21-Jan-11 0:10

Hi All,

I want to iterate all the rows of the DataGrid in my SilverLight web application..

Can anyone tell me how to iterate?

I have googled, but no luck....

Thanks,
Sunil G.

Re: Iterate DataGrid in Silverlight web application.

Pete O'Hanlon21-Jan-11 0:57

21-Jan-11 0:57

The usual way is not to work against the rows, but rather to work against the underlying data. With Silverlight and WPF it pays to stop thinking in the old ways of doing things, and embrace the rich databinding support along with a pattern such as MVVM.

I'm not a stalker, I just know things. Oh by the way, you're out of milk.

Forgive your enemies - it messes with their heads

Re: Iterate DataGrid in Silverlight web application.

Mycroft Holmes21-Jan-11 17:00

Mycroft Holmes

21-Jan-11 17:00

I found an exception to that particular rule. There does not seem to be a reasonable way to bind the SelectedItems of the gridview, I'm iterating them in the code behind and stuffing a list<> in the viewmodel.

Never underestimate the power of human stupidity
RAH

Re: Iterate DataGrid in Silverlight web application.

Pete O'Hanlon22-Jan-11 9:16

22-Jan-11 9:16

You could do it by having an

IsSelected

property and update that if it's selected.

I'm not a stalker, I just know things. Oh by the way, you're out of milk.

Forgive your enemies - it messes with their heads

Re: Iterate DataGrid in Silverlight web application.

Mycroft Holmes21-Jan-11 17:01

Mycroft Holmes

21-Jan-11 17:01

Sunil G 3 wrote:
I have googled, but no luck....

Thats b/c is is WRONG, as Pete suggested use the underlying data collection

Never underestimate the power of human stupidity
RAH

Assign a context to a UI Element

Adrian020-Jan-11 21:36

Adrian0

20-Jan-11 21:36

I have several pairs of TextBlock and an Image next to each other. OnMouseLeftButtonDown I want to modify the TextBlock. That is some standard situation, but in this case I don't want to add an EventHandler to each image as there are many of them.

How can I user only one Handler and change the corresponding TextBlock. I've tried to add some DataContext to the image but it did not work out.

Can anyone give me some help?
Thanks!

dasblinkenlight21-Jan-11 3:16

dasblinkenlight

21-Jan-11 3:16

You can use the Tag tag to store additional info with your images, for example:

XML

<Image Tag="textbox1" MouseLeftButtonDown="Image_MouseLeftButtonDown"  />
<Image Tag="textbox2" MouseLeftButtonDown="Image_MouseLeftButtonDown"  />

Now you can access the tag in your event handler, and act based on its value:

private void Image_MouseLeftButtonDown(object sender, MouseButtonEventArgs e) {
    var textboxName = ((Image) sender).Tag;
    // pick a text box based on the tag
}

Adrian021-Jan-11 3:30

Adrian0

21-Jan-11 3:30

Hi dasblinkenlight,

thank you for your reply. This might be a solution. Would be great to access the textbox directly when an event is fired. Otherwise I need to put all textboxes in an array or not?

I thought of something like this below.

<TextBox x:Name="UserNameTB" />
<TextBox x:Name="AddressTB" />
<Image Source="..." MouseLeftButtonDown="editText_MouseLeftButtonDown" Tag="{UserNameTB}"/>
<Image Source="..." MouseLeftButtonDown="editText_MouseLeftButtonDown" Tag="{AddressTB}"/>

Is it possible to access it like this??

TextBox userNameTB = ((sender as Image).Tag) as TextBox);

Tried some combinations but with no luck.

Greets
Adrian

dasblinkenlight21-Jan-11 4:00

dasblinkenlight

21-Jan-11 4:00

Yes, that trick ought to work! I verified that your code works with a slightly modified XAML (I used SilverLight 4):

XML

<Image Source="..." MouseLeftButtonDown="editText_MouseLeftButtonDown" Tag="{Binding ElementName=UserNameTB}"/>
<Image Source="..." MouseLeftButtonDown="editText_MouseLeftButtonDown" Tag="{Binding ElementName=AddressTB}"/>

Pete O'Hanlon21-Jan-11 3:40

21-Jan-11 3:40

If I were doing this, I'd have a collection containing the details of the image, and a text item representing the text you want to display in the TextBlock. Then, I'd bind to this using something like a ListView.

In other words, I'd use MVVM to cope with this. I suggest that you have a look into this, and simplify the problem hugely.

I'm not a stalker, I just know things. Oh by the way, you're out of milk.

Forgive your enemies - it messes with their heads