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• XAML Binding to property

  - by imslavko

  I have check box in my XAML+C# Windows Store application. Also I have bool property: WindowsStoreTestApp.SessionData.RememberUser which is public and static. I want check box's property IsChecked to be consistent (or binded, or mapped) to this bool property. I tried this: XAML <CheckBox x:Name="chbRemember1" IsChecked="{Binding Mode=TwoWay}"/> C# chbRemember1.DataContext = SessionData.RememberUser; Code for property: namespace WindowsStoreTestApp { public class SessionData { public static bool RememberUser { get; set; } } } But it doesn't seem to work. Can you help me?

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• WPF Binding to change fill color of ellipse

  - by user294382

  Probably a simple question but: How do I programmatically change the color of an ellipse that is defined in XAML based on a variable? Everything I've read on binding is based on collections and lists -can't I set it simply (and literally) based on the value of a string variable? string color = "red" color = "#FF0000"

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• WPF DataGrid binding to UserControl

  - by Trindaz

  I have a DataGrid with one column using a UserControl via a styled DataGridTemplateColumn. I can't seem to get the UserControl to 'see' the object that is in it's containing DataGridCell though. What kind of bindings can I create on the TextBox in my UserControl so that it can look up and see that object?! My UserControl and TemplateColumn Style are defined as: <Window.Resources> <local:UCTest x:Key="UCTest" /> <Style x:Key="TestStyle" TargetType="{x:Type WpfToolkit:DataGridCell}"> <Style.Setters> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type WpfToolkit:DataGridCell}"> <Grid Background="{Binding RelativeSource={RelativeSource TemplatedParent}, Converter={StaticResource drc}, Path=DataContext}"> <Grid.ColumnDefinitions> <ColumnDefinition/> <ColumnDefinition/> </Grid.ColumnDefinitions> <local:UCTest /> </Grid> </ControlTemplate> </Setter.Value> </Setter> </Style.Setters> </Style> </Window.Resources> and my sample DataGrid is defined as: <WpfToolkit:DataGrid Name="dgSampleData" ItemsSource="{Binding}" AutoGenerateColumns="True" Margin="0,75,0,0"> <WpfToolkit:DataGrid.Columns> <WpfToolkit:DataGridTemplateColumn Header="Col2" CellStyle="{StaticResource TestStyle}" /> </WpfToolkit:DataGrid.Columns> </WpfToolkit:DataGrid> and my User Control is defined in a separate file as: <UserControl x:Class="UCTest" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:local="clr-namespace:WpfApplication1" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Width="104" Height="51"> <UserControl.Resources> <local:DataRowConverter x:Key="drc" /> </UserControl.Resources> <Grid> <TextBox Margin="12,12,-155,16" Name="TextBox1" Text="" /> </Grid> EDIT: My implementation of TestClass, which has the Test Property, which I want UCTest.TextBox1 to bind do: Public Class TestClass Private _Test As String = "Hello World Property!" Public Property Test() As String Get Return _Test End Get Set(ByVal value As String) _Test = value End Set End Property End Class Thanks in advance!

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• Binding to the selected item in an ItemsControl

  - by Jensen

  I created a custom ComboBox as follows: (note, code is not correct but you should get the general idea.) The ComboBox contains 2 dependency properties which matter: TitleText and DescriptionText. <Grid> <TextBlock x:Name="Title"/> <Grid x:Name="CBG"> <ToggleButton/> <ContentPresenter/> <Popup/> </Grid> </Grid> I want to use this ComboBox to display a wide range of options. I created a class called Setting which inherits from DependencyObject to create usable items, I created a DataTemplate to bind the contents of this Settings object to my ComboBox and created a UserControl which contains an ItemControl which has as a template my previously mentioned DataTemplate. I can fill it with Setting objects. <DataTemplate x:Key="myDataTemplate"> <ComboBox TitleText="{Binding Title}" DescriptionText="{Binding DescriptionText}"/> </DataTemplate> <UserControl> <Grid> <StackPanel Grid.Column="0"> <ItemsControl Template="{StaticResource myDataTemplate}"> <Item> <Setting Title="Foo" Description="Bar"> <Option>Yes</Option><Option>No</Option> </Setting> </Item> </ItemsControl> </StackPanel> <StackPanel Grid.Column="1"> <TextBlock x:Name="Description"/> </StackPanel> </Grid> </UserControl> I would like to have the DescriptionText of the selected ComboBox (selected by either the IsFocus of the ComboBox control or the IsOpen property of the popup) to be placed in the Description TextBlock in my UserControl. One way I managed to achieve this was replacing my ItemsControl by a ListBox but this caused several issues: it always showed a scrollbar even though I disabled it, it wouldn't catch focus when my popup was open but only when I explicitly selected the item in my ListBox, when I enabled the OverridesDefaultStyle property the contents of the ListBox wouldn't show up at all, I had to re-theme the ListBox control to match my UserControl layout... What's the best and easiest way to get my DescriptionText to show up without using a ListBox or creating a custom Selector control (as that had the same effect as a ListBox)? The goal at the end is to loop through all the items (maybe get them into an ObservableCollection or some sort and to save them into my settings file.

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• WPF Binding Syntax Question

  - by Gurdas Nijor

  I've seen this syntax show up, and have tried to google for it's definition to no avail; what does it mean when a dp is bound this way? <Grid> <ContentControl Content="{Binding}"/> </Grid> I was under the assumption that you have to bind to some property on the DataContext, or another element, but this appears to bind to nothing.

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• Binding Setter.Value from code

  - by chaiguy

  In XAML I can write something like this: <Setter Property="PropertyName" Value="{Binding ...}" /> How would I do this in code? I've constructed bindings in code before, but I can't seem to find any static ValueProperty object on the Setter class to pass to BindingOperations.SetBinding().

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• WPF binding not updating until after another action

  - by Matthew Stanford

  I have an observable collection bound to a listbox in WPF. One of the options in the window is to use an OpenFileDialog to add an item to the listbox with certain properties. When I use the OpenFileDialog it immeditaely sets two of the properties of the new item in the observable collection. I am using INotifyPropertyChanged to update the listbox. These two new properties are set correctly and now the listbox should display the title contained in the new title property and the title textbox which is bound to the listbox should display the new title as well. However, neither displays the new title upon the closing of the OpenFileDialog and when I click on another item in the listbox and come back to the item I have just changed it updates the title textbox but the title displayed in the list box is not changed until i move the item in the list box that I want to change. Here is the Binding code. ItemsSource="{Binding Path=MyData, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" And here is the implementation of the browse button that is not working (L1 being the listbox) private void browse_Click(object sender, RoutedEventArgs e) { OpenFileDialog opf = new OpenFileDialog(); opf.ShowDialog(); MyData[L1.SelectedIndex].Title = System.IO.Path.GetFileNameWithoutExtension(opf.FileName); MyData[L1.SelectedIndex].Command = opf.FileName; } When I simply type in the text boxes and click out of them it updates the list box immediately with the new information I have put in. I also have a create new button and upon clicking it, it immediately adds a new item to the list box and updates its' properties. The only one that is not updating correctly is this peice of code I have given you. Thanks for your help. EDIT: Here is my implementation of INotifyPropertyChanged private OCLB _MyData; public OCLB MyData { get { return _MyData; } set { _MyData= value; FirePropertyNotifyChanged("MyData"); } } OCLB is the obserable collection. Here is the function FirePropertyNotifyChanged public event PropertyChangedEventHandler PropertyChanged; private void FirePropertyNotifyChanged(string propertyName) { if (PropertyChanged != null) { PropertyChanged(this, new PropertyChangedEventArgs(propertyName)); } } Each of these are in the partial class MainWindow for the wpf form. I also have a class for the MyData files (with 4 get/set functions) that are stored in the OCLB(observable collection). There is also a class with functions for the OCLB.

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• WPF: change binding properties for multiple controls

  - by Catalin DICU

  I'd like that all the Text bindings for the TextBoxes in my UserControl to have UpdateSourceTrigger=PropertyChanged, and ValidatesOnDataErrors=True How to do it ? I can think of a solution: use another class for bindings (a class inheriting Binding) but maybe there is another solution, maybe using a style or template ?

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• Binding to a RelativeSource Self in Silverlight

  - by Boris

  Hello, I am trying to bind a value of a slider control to a property that is in the same control: <Slider Value="{Binding Path=ValueProperty, RelativeSource={RelativeSource Self}}" Name="slider1" /> but it doesn't bind to a "ValuePropery"... What am I doing wrong?

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• Datatable binding to a form is not working

  - by saurabh

  Hi All i am having a form which are having 4 lables and these lables value are displayed in the 4 textboxs, i am using MVVM and binding these textboxs with the Datatble which is coming through the typed dataset not the problem here is when i add a new row in the datatable with default values of columns and update ui by calling onpropertychanged event from my viewmodel , these values are not getting reflected on the form. Before adding a new row in the table , i am removing all previous rows and then add. TIA. Saurabh

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• How do I use Flex's Binding in a Flash AS3 project

  - by Glycerine

  I have a flash app using the flex framework - I would like to bind a display object textField with data from my dataModel. How do I do this without the flex binding brackets "{ }" Thanks in advance everyone.

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• Default encoding type for wsHttp binding

  - by user102533

  My understanding was that the default encoding for wsHttp binding is text. However, when I use Fiddler to see the SOAP message, a part of it looks like this: <s:Envelope xmlns:s="http://www.w3.org/2003/05/soap-envelope" xmlns:a="http://www.w3.org/2005/08/addressing" xmlns:u="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd"><s:Header><a:Action s:mustUnderstand="1" u:Id="_2">http://tempuri.org/Services/MyContract/GetDataResponse</a:Action><a:RelatesTo u:Id="_3">urn:uuid:503c5525-f585-4ecd-ac09-24db78526952</a:RelatesTo><o:Security s:mustUnderstand="1" xmlns:o="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd"><u:Timestamp u:Id="uuid-8935f789-fbb7-4c69-9f67-7708373088c5-22"><u:Created>2010-03-08T19:15:50.852Z</u:Created><u:Expires>2010-03-08T19:20:50.852Z</u:Expires></u:Timestamp><c:DerivedKeyToken u:Id="uuid-8935f789-fbb7-4c69-9f67-7708373088c5-18" xmlns:c="http://schemas.xmlsoap.org/ws/2005/02/sc"><o:SecurityTokenReference><o:Reference URI="urn:uuid:b2cbfe07-8093-4f44-8a06-f8b062291643" ValueType="http://schemas.xmlsoap.org/ws/2005/02/sc/sct"/></o:SecurityTokenReference><c:Offset>0</c:Offset><c:Length>24</c:Length><c:Nonce>afOoDygRG7BW+q8+makVIA==</c:Nonce></c:DerivedKeyToken><c:DerivedKeyToken u:Id="uuid-8935f789-fbb7-4c69-9f67-7708373088c5-19" xmlns:c="http://schemas.xmlsoap.org/ws/2005/02/sc"><o:SecurityTokenReference><o:Reference URI="urn:uuid:b2cbfe07-8093-4f44-8a06-f8b062291643" ValueType="http://schemas.xmlsoap.org/ws/2005/02/sc/sct"/></o:SecurityTokenReference><c:Nonce>l4rFsdYKLJTK4tgUWrSBRw==</c:Nonce></c:DerivedKeyToken><e:ReferenceList xmlns:e="http://www.w3.org/2001/04/xmlenc#"><e:DataReference URI="#_1"/><e:DataReference URI="#_4"/></e:ReferenceList><e:EncryptedData Id="_4" Type="http://www.w3.org/2001/04/xmlenc#Element" xmlns:e="http://www.w3.org/2001/04/xmlenc#"><e:EncryptionMethod Algorithm="http://www.w3.org/2001/04/xmlenc#aes256-cbc"/><KeyInfo xmlns="http://www.w3.org/2000/09/xmldsig#"><o:SecurityTokenReference><o:Reference ValueType="http://schemas.xmlsoap.org/ws/2005/02/sc/dk" URI="#uuid-8935f789-fbb7-4c69-9f67-7708373088c5-19"/></o:SecurityTokenReference></KeyInfo><e:CipherData><e:CipherValue>dW8B7wGV9tYaxM5ADzY6UuEgB5TFzdy4BZjOtF0NEbHyNevCIAVHMoyA69U4oUjQHMJD5nHS0N4tnJqfJkYellKlpFZcwqruJ1J/TFx9uwLFFAwZ+dSfkDqgKu/1MFzVSY8eyeYKmbPbVEYOHr0lhw3+7wn5NQr3yxvCjlucTAdklIhD72YnVlSVapOW3zgysGt5hStyj+bmIz5hLGyyv6If4HzWjUiru8V3iMM/ss1I+i9sJOD013kr4zaaA937CN9+/aZ2wbDXnYj31UX49uE/vvt9Tl+c4SiydbiX7tp1eNSTx9Ms5O64gb3aUmHEAYOJ19XCrr756ssFZtaE7QOAoPQkFbx9zXy0mb9j1YoPQNG+JAcrN0yoRN1klhccmY+csfYXdq7YBB/KS+u2WnUjQ7SlNFy5qIPxuy5y0Jyedr2diPKLi0gUi+cK49BLQtG/XEShtxFaeMy7zZTrQADxww7kEkhvtmAlmyRbz3oGc+ This doesn't look like text encoding to me (Shouldn't text encoding send data in readable form)? What am I missing? Also, how do I setup binary encoding for wsHttp binding?

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• WPF Binding to code behind methods

  - by Matt B

  Hi all, This is annoying - I know how I'd do it in web... I have a wpf image and I want to bind it's source property to a method, and pass in a property from it's bound item. IE. <image source="GetMySource({binding name})" /> Where GetMySource is protected string GetMySource(string name) { return "images/"+name+".png"; }

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• WCF interoperability binding for duplex communication?

  - by mt_serg

  I have a wcf sevice and silverlight client. My contract has callbacks and therefore I implement PollingDuplexHttpBinding. Now, I want connect to wcf service from java or c++ code. What binding should I add to service config ?

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• 'Auto' value in binding property 'width'

  - by Ivan

  Must attach to the property Width, what I'm doing this: <ColumnDefinition Width="{Binding Path=TabPanelWidth, RelativeSource={RelativeSource TemplatedParent}}" /> - public float TabPanelWidth { get {return (float) GetValue (TabPanelWidthProperty);} set {SetValue (TabPanelWidthProperty, value);} } public static readonly DependencyProperty TabPanelWidthProperty = DependencyProperty.Register ("TabPanelWidth", typeof (float), typeof (BivTabControl), new UIPropertyMetadata (null)); But vozmozhnast need to set not only fixed values, but still a value of type: Auto, 0.5 *, and the like. Any ideas?

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• Binding Listbox Items

  - by Sergio

  Hi, I have a user with it's roles, it's an entitycollection. I have a ListBox that has all possible roles, and I have them like checkboxes, but I want to bind the IsChecked property of each one to check if the user has the role. Something like IsChecked={Binding Roles.Contains}

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• MVC-style model binding in WCF?

  - by Mark

  I want to bind POSTed form values to parameters in my WCF operation in the same way that ASP.Net MVC allows me to do. So, for example if my form has "customer.Name" and "customer.Age" parameters, I want to make a standard HTML POST to a named endpoint/operation that takes a customer parameter and have it instantiated and populated like MVC can do... It looks like I can use WebInvoke and its UriTemplate property to map simple parameters - does anyone know if a more MVC-like model-binding way is possible? Thanks, Mark.

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• Silverlight textblock binding question + MVVM

  - by AdrianDN

  Hello everyone, I'm trying to create a simple textblock control and I'm trying to insert a property from my ViewModel in the middle of the string. E.G. "Hello, My name is XX, bla, bla." (XX is a property from my ViewModel) <TextBlock Text="Hello, My name is {Binding SelectedUser.Name}, bla, bla." /> Is that possible? Regards, Adrian

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• python binding of variable to particular expression

  - by user209123

  I am developing a simple application which hava a file Constants.py containing all configuration, it is like this x = y during execution of program , the value of y changes , I want value of x o get updated too , automatically, this can be reffered as binding, how can I achieve this

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• WCFServiceException: Required attribute 'binding' not found.

  - by user359349

  Hi, My WCF Service when hosted is throwing an error: WCF Service PayThisException: Required attribute 'binding' not found. (C:\Temp\WCFVirtualDirPath\web.config line 278) Please help me with some solution. Cheers, Ravi Santlani

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• Binding Enum[] to ListBox

  - by Polaris

  Hello. I have next enumeration Enum rcCategory { Incoming, Internal, Outgoing } and I have property "categories" in my class which has rcCategory[] type. I would like to bind this property to the listBox. I use next code for this MyListBox.SetBinding (ListBox.ItemsSource, new Binding {Source= myClass.categories}); But this code doesnt work as expected. How Can I do this. My listBox always is empty but source property has value

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• Categories in static library for iPhone device 3.0

  - by Nick

  I have categories in my static library. Any application developer should set -ObjC flag to "Other Linker Flags" to use my static library properly. It works fine for iPhone device/iPhone Simulator 2.x and iPhone Simulator 3.0. But it crashes for iPhone device 3.0. As written in this article it is new linker bug. They suggest to use one more linker flag: -all_load. But when I add this flag, build fails too, because there are duplicate symbols. How to use categories in static libraries for iPhone device 3.0? Any suggestions?

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• DLL export of a static function

  - by Begbie00

  Hi all - I have the following static function: static inline HandVal StdDeck_StdRules_EVAL_N( StdDeck_CardMask cards, int n_cards ) Can I export this function in a DLL? If so, how? Thanks, Mike Background information: I'm doing this because the original source code came with a VS project designed to compile as a static (.lib) library. In order to use ctypes/Python, I'm converting the project to a DLL. I started a VS project as a DLL and imported the original source code. The project builds into a DLL, but none of the functions (including functions such as the one listed above) are exported (as confirmed by both the absence of dllexport in the source code and tools such as DLL Export Viewer). I tried to follow the general advice here (create an exportable wrapper function within the header) to no avail...functions still don't appear to be exported.

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• .NET: will Random.Random operate differently inside a static method

  - by Craig Johnston

  I am having difficulty with the following code which is inside a static method of a non-static class. int iRand; int rand; rand = new Random((int)DateTime.Now.Ticks); iRand = rand.Next(50000); The iRand number, along with some other values, are being inserted into a new row of an Access MDB table via OLEDB. The iRand number is being inserted into a field that is part of the primary key, and the insert attempt is throwing the following exception even though the iRand number is supposed to be random: System.Data.OleDb.OleDbException: The changes you requested to the table were not successful because they would create duplicate values in the index, primary key, or relationship. Change the data in the field or fields that contain duplicate data, remove the index, or redefine the index to permit duplicate entries and try again. Could the fact the method is static be making the iRand number stay the same, for some reason?

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• accessing a static property via COM

  - by joreg

  is it possible to access a static property of a COM object without creating an instance of the object? my situation is this: i have an unmanaged application (written in delphi). this application exposes a COM-based plugininterface. until now i only wrote managed plugins in c#. plugins provide their info (name, author, ..) via a static property that returns an instance of PluginInfo (which implements IPluginInfo). this static property i can access on the managed plugins using http://managedvcl.com. now i want to write unmanaged plugins on the same interface. i can load them using: plug := CreateComObject(TGuid) as IMyPlugInterface; and they run, but i don't know how to read out their PluginInfo. so the question again is: is there another way than implementing IPluginInfo in the plugin-class and only accessing the info after i have created an instance of the plugin?

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