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Hello,
Thanks for the response. I am calling this method in the button click event and instantiated the SaveFileDialog in the same. Still got the error.
Thanks...
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This[^] might help/
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.
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Hi ,
I have a WPF - window, contains a StackPanel (designed in xmal, where height and width are Auto = 0). In code reading an image folder and adding the files to stackPanel. While adding files to image control, created a border object and intern created the image object and fina tlly adding the border to stackpanel.
Now when i try to resize the window, the stackpanel stays same size , as the image control width and hight are fixed thou the stackpanel is auto size.
below is the code snip ,
//after reading the image files, add it to stack panel
foreach (string strFile in ArrStrFiles)
{
// display the file names here
BitmapImage bi = new BitmapImage();
bi.BeginInit();
bi.CacheOption = BitmapCacheOption.OnLoad;
bi.UriSource = new Uri(strFile);
bi.EndInit();
Image img = new Image();
img.Source = bi;
img.Width = 170;
img.Height = stkPanl.ActualHeight;
img.Stretch = Stretch.Fill;
img.HorizontalAlignment = HorizontalAlignment.Stretch;
img.VerticalAlignment = VerticalAlignment.Stretch;
Border border = new Border();
border.Background = new SolidColorBrush(Colors.Black);
border.BorderThickness = new Thickness(5);
border.BorderBrush = new SolidColorBrush(Colors.Black);
border.Child = img;
stkPanl.Children.Add(border);
}
xmal :
<window ...="">
<grid>
<local:scrollviewerex x:name="scrollViewerEx" margin="92.664,0,92.349,7.137" verticalscrollbarvisibility="Hidden"
="" horizontalscrollbarvisibility="Hidden" verticalalignment="Bottom" background="Black" rendertransformorigin="0.5,0.5">
<local:scrollviewerex.rendertransform>
<transformgroup>
<scaletransform="">
<skewtransform>
<rotatetransform angle="360.216">
<translatetransform>
<stackpanel x:name="stkPanl" background="Black" orientation="Horizontal" rendertransformorigin="0.5,0.5">
Plz let me know how we can resize the stackPanel when the image is added thru code.
thanks
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Xmal Part missed :
<window> ..
<grid>
<local:scrollviewerex x:name="scrollViewerEx" margin="92.664,0,92.349,7.137" verticalscrollbarvisibility="Hidden"
="" horizontalscrollbarvisibility="Hidden" verticalalignment="Bottom" background="Black" rendertransformorigin="0.5,0.5">
<local:scrollviewerex.rendertransform>
<transformgroup>
<scaletransform>
<skewtransform>
<rotatetransform angle="360.216">
<translatetransform>
<stackpanel x:name="stkPanl" background="Black" orientation="Horizontal" rendertransformorigin="0.5,0.5">
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Hi,
Can anyone tell me how to check the duplicate data is present in listbox itemtemplate..
i have listbox, where i need to check whether the data enterred by the user in textbox is duplicate or not, how to do it..
my code is like this..
<ListBox x:Name="lbDirectiveList" MaxHeight="200" SelectionChanged="lbDirectiveList_SelectionChanged" SelectionMode="Single" ScrollViewer.VerticalScrollBarVisibility="Auto">
<ListBox.ItemTemplate>
<DataTemplate>
<Grid Margin="4">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="10" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<TextBlock Text="{Binding Path=DirectiveName}" Grid.Column="0" FontWeight="Bold" MinWidth="180"/>
<TextBlock Text=" - " Grid.Column="1"/>
<TextBlock Grid.Column="2" Text="{Binding Path=Descr }" />
</Grid>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
ObservableCollection<Directive> listdata=new ObservableCollection<Directive>();
class Directive
{
public string DirectiveName { get; set; }
public string Descr { get; set; }
}
Directive lstdir=new Directive {DirectiveName=txt1.Text.Trim(),Descr=txt2.Text.Trim()};
void Add(object sender,RoutedEventArgs e)
{
if(!listdata.Contains(lstdir))
{MessageBox.Show("Insert");}
else MessageBox.Show("Duplicate Data");
}
it is taking the duplicate value, after using the above code...
so any help on this...
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In the code where you bind the property of the textbox, write some code to check if if the text box value is already contained within the collection that binds to the listbox. You can then handle the duplicate as you like.
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.
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hi, i have used the code like the way u said, still its not running the code inside it(if Condition)...
Directive lstdir = new Directive { DirectiveName = txtDirectiveName.Text.Trim(), DirectiveDescription = txtDirectiveDescription.Text.Trim() };
if (txtDirectiveName.Text != lstdir.DirectiveName && txtDirectiveDescription.Text != lstdir.DirectiveDescription)
{
MessageBox.Show("Execute");
}
else MessageBox.Show("Duplicate Data")
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Hello,
I have a UserControl that exposes a Selection property:
public partial class FeatureSelectionControl : UserControl
{
public string[] Selection
{
get { return (string[])GetValue(SelectionProperty); }
set { SetValue(SelectionProperty, value); }
}
public static readonly DependencyProperty SelectionProperty =
DependencyProperty.Register("Selection", typeof(string[]), typeof(FeatureSelectionControl), new UIPropertyMetadata(new string[] { }));
I want to use it in a window and bind the control's property to one of the window's properties:
<Window Name="Window" ...>
<local:FeatureSelectionControl Selection="{Binding ElementName=Window,Path=CustomerGroups}" ...>
</local:FeatureSelectionControl>
Code behind:
public partial class WindowCounterpartyGroupRiskReview : Window
{
public WindowCounterpartyGroupRiskReview()
{
CustomerGroups = new string[] { };
InitializeComponent();
}
public string[] CustomerGroups { get; set; }
This crashes with a "first chance exception of type 'System.NullReferenceException' occurred in PresentationFramework.dll Additional information: Object reference not set to an instance of an object". STack trace is:
PresentationFramework.dll!System.Windows.Markup.BamlRecordReader.ProvideValueFromMarkupExtension(System.Windows.Markup.MarkupExtension markupExtension = null, object obj = {System.Windows.Markup.BamlCollectionHolder}, object member = null) + 0x52 bytes
PresentationFramework.dll!System.Windows.Markup.BamlRecordReader.ReadPropertyArrayEndRecord() + 0x5f bytes
PresentationFramework.dll!System.Windows.Markup.BamlRecordReader.ReadRecord(System.Windows.Markup.BamlRecord bamlRecord) + 0x636 bytes
PresentationFramework.dll!System.Windows.Markup.BamlRecordReader.Read(bool singleRecord = false) + 0x1c bytes
PresentationFramework.dll!System.Windows.Markup.TreeBuilderBamlTranslator.ParseFragment() + 0xc9 bytes
PresentationFramework.dll!System.Windows.Markup.TreeBuilder.Parse() + 0xf bytes
PresentationFramework.dll!System.Windows.Markup.XamlReader.LoadBaml(System.IO.Stream stream, System.Windows.Markup.ParserContext parserContext, object parent, bool closeStream) + 0xc7 bytes
PresentationFramework.dll!System.Windows.Application.LoadComponent(object component, System.Uri resourceLocator) + 0x16e bytes
> CRRT.exe!CRRT.WindowCounterpartyGroupRiskReview.InitializeComponent() Line 1 + 0xb bytes C#
However, when I change my code and make the property a mere string, I don't get an exception and everything works as expected.
Any idea ?
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Ok I found the solution here: use a List<string> instead of a string[].
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Hello,
I'm having some difficulty retrieving JSON formatted data returned from a remote server. I'm using Silverlight 4 in VS 2010. My code is as follows:
byte[] response = new byte[32768];
SocketAsyncEventArgs e = new SocketAsyncEventArgs();
e.SetBuffer(response, 0, response.Length);
soc.ReceiveAsync(e);
string data = Encoding.UTF8.GetString(e.Buffer, e.Offset, e.BytesTransferred).Trim(new char[] { '\0' });
If I uncomment the call to Sleep for 4 or 5 seconds, then my string variable "data" populates consistently. However, if I don't Sleep, then after a few times of receiving updates, the variable "data" is consistently empty (although there is data in the buffer). Basically, I have to slow the whole process down in order to get my updates. That's not an acceptable solution though, as I'm dealing with market data which needs to be processed in real-time.
Incidentally, nearly identical code works without the call to Sleep in a console app I wrote against the same remote server. In that case, the following works perfectly:
byte[] snapBytes = new byte[32768];
soc.Receive(snapBytes);
String data = Encoding.ASCII.GetString(snapBytes).Trim(new char[] { '\0' });
Thanks in advance for any thoughts or ideas.
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Well, yeah...
Do you understand what the "Async" in "ReceiveAsync" is supposed to do? Its an asynchronous function meaning its non blocking. So when you call soc.ReceiveAsync() it IMMEDIATELY goes to the next line and the buffer will be filled to a random length depending on millions of things.
This is used so you don't hang your GUI and don't need to handle multi-threading yourself.
You need to wait til the call is *really* done. For instance, by subscribing to the SocketAsyncEventArgs.Completed event  .
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Hello,
Anyone can tell me advantages using PRISM in Silverlight.
And Which design pattern is suitable for PRISM....Its MVVM?
Thanks & Regards...
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Code Project author and Prism team member Karl Shifflett has literally written the book on Prism development. Check out his blog[^], and order the book.
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MVVM does complement Prism.
Prism give you an opportunity to work in a more decoupled UI / code environment while giving you necessary framework features to call these framework features.
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.
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Hi,
I have just started learning WPF and exploring more on WPF controls.
Can any one help how to display popup? I have used TextBlock under popup control as below :
<pre> <Popup StaysOpen="True">
<TextBlock Name="txtBlock1">
This is simple PopUp in WPF..
</TextBlock>
</Popup></pre>
But how to trigger this popup?
Thanks and regards,
Rahul Chitte
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Popups are shown with the IsOpen method.
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Two ways:
1) Give it a name (The Popup itself, not just the TextBlock), and open it in the code-behind
2) (The preferred method) Bind the Popup's IsOpen property to something else, such as a toggle button or a boolean field on your underlying model.
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This sample [^]could help you out.
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.
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That's a good example! 
People with high attitude deserve the standing ovation of our highest finger!
My Blog![ ^]
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Thank you Tarun.
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.
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OK; I have digested the depressing news I got in my "Data Access for Dummies" thread below and accepted that I need to create a Silverlight 4 client app and a WCF host service that supplies the data.
SFSG!
Of course, I want to create a common class library containing the DTO class definitions so that the host and the client can share the same definitions.
BUT!!! If I create a Silverlight class library, I can't use Ado objects to access the db (which I want to do), and if I create a "normal" windows class library, I can't reference it in my Silverlight client app.
So how can I do that???
Beidh ceol, caint agus craic againn - Seán Bán Breathnach
-----
Don't tell my folks I'm a computer programmer - They think I'm a piano player in a cat house...
-----
Da mihi sis crustum Etruscum cum omnibus in eo!
-----
Everybody is ignorant, only on different subjects - Will Rogers, 1924
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Do you know how WCF works? I'm not being funny, I'm just trying to find a common basepoint here. If you have your Silverlight app needing to know about Ado types, then you have just put a hard dependency in which means that your service could not be consumed by other types of systems (such as Java ones) that have no knowledge of the Ado types.
You create your model as a DataContract. Here's an example:
namespace WcfServer
{
using System;
using System.Runtime.Serialization;
[DataContract]
public class Customer
{
[DataMember]
public string Forename { get; set; }
[DataMember]
public string Surname { get; set; }
[DataMember]
public DateTime DateOfBirth { get; set; }
[DataMember]
public int Id { get; internal set; }
}
}As you can see, it's POCO. Now, the point here is that you don't add this as a class library into your Silverlight application. What you do, is import the service reference into your Silverlight application, so it gets access to the contract (and all the other gubbins it needs, such as the OperationContract). You now have a nice separation in place which means that you can leverage things such as web farms to manage scalability of your service.
As you are new at this, I would recommend buying a book and reading up on this. There's a lot to it, and it's well worth the investment. The book I usually recommend for Silverlight is Silverlight 4 Unleashed[^] by MVP and Mix speaker, Laurent Bugnion.
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All this is quite new to me, I've never used neither Silverlight nor WCF before and my knowledge about those techniques is quite limited, hence the stupid questions.
Thanks for having patience with me, though. I get your point above to a certain point. But isn't it so (with reference to your example) that the Customer class with its DataContract attributes needs to be defined and have identical definitions on both sides of the WCF wall? That is at least what I seem to recall having read somewhere.
Thanks for the book recommendation. I actually ordered that very book yesterday. But since it's going to take some time for it to arrive, I thought I'd get going by asking stupid questions in this Forum in the meanwhile... 
Beidh ceol, caint agus craic againn - Seán Bán Breathnach
-----
Don't tell my folks I'm a computer programmer - They think I'm a piano player in a cat house...
-----
Da mihi sis crustum Etruscum cum omnibus in eo!
-----
Everybody is ignorant, only on different subjects - Will Rogers, 1924
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Johnny J. wrote: But isn't it so (with reference to your example) that the Customer class with
its DataContract attributes needs to be defined and have identical definitions
on both sides of the WCF wall?
Yes, but when you import the service reference, that comes with it. In other words, the proxy implementation that your Silverlight service calls is created for you - that's cool.
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