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• Is this a good job description? What title would you give this position?

  - by Zack Peterson

  Department: Information Technology Reports To: Chief Information Officer Purpose: Company's ________________ is specifically engaged in the development of World Wide Web applications and distributed network applications. This person is concerned with all facets of the software development process and specializes in software product management. He or she contributes to projects in an application architect role and also performs individual programming tasks. Essential Duties & Responsibilities: This person is involved in all aspects of the software development process such as: Participation in software product definitions, including requirements analysis and specification Development and refinement of simulations or prototypes to confirm requirements Feasibility and cost-benefit analysis, including the choice of architecture and framework Application and database design Implementation (e.g. installation, configuration, customization, integration, data migration) Authoring of documentation needed by users and partners Testing, including defining/supporting acceptance testing and gathering feedback from pre-release testers Participation in software release and post-release activities, including support for product launch evangelism (e.g. developing demonstrations and/or samples) and subsequent product build/release cycles Maintenance Qualifications: Bachelor's degree in computer science or software engineering Several years of professional programming experience Proficiency in the general technology of the World Wide Web: Hypertext Transfer Protocol (HTTP) Hypertext Markup Language (HTML) JavaScript Cascading Style Sheets (CSS) Proficiency in the following principles, practices, and techniques: Accessibility Interoperability Usability Security (especially prevention of SQL injection and cross-site scripting (XSS) attacks) Object-oriented programming (e.g. encapsulation, inheritance, modularity, polymorphism, etc.) Relational database design (e.g. normalization, orthogonality) Search engine optimization (SEO) Asynchronous JavaScript and XML (AJAX) Proficiency in the following specific technologies utilized by Company: C# or Visual Basic .NET ADO.NET (including ADO.NET Entity Framework) ASP.NET (including ASP.NET MVC Framework) Windows Presentation Foundation (WPF) Language Integrated Query (LINQ) Extensible Application Markup Language (XAML) jQuery Transact-SQL (T-SQL) Microsoft Visual Studio Microsoft Internet Information Services (IIS) Microsoft SQL Server Adobe Photoshop

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• Bind a generic list to a listbox and also use a datatemplate

  - by muku

  Hello, I'm trying to implement something quite simple but I'm on my first steps in WPF and I'm having some problems. I have a class called Component which has a property called Vertices. Vertices is a generic List of type Point. What I want is to bind the vertices property to a listbox. This is easy by using this code in my XAML in the listbox declaration: ItemsSource="{Binding Path=Component.Vertices, Mode=OneWay, Converter={StaticResource verticesconverter},UpdateSourceTrigger=PropertyChanged}" The tricky part is when I try to create a datatemplate for the listbox. I want each row of the listbox to display a textbox with the values of the Vertex (Point.X, Point.Y) and a button to allow me to delete the item. Could you help me on the datatemplate definition. The code below doesn't work to bind the X,Y values into two separate textboxes. Could you point me on the mistake and why nothing is displayed in the textboxes? <ListBox ItemsSource="{Binding Path=Component.Vertices, Mode=OneWay,UpdateSourceTrigger=PropertyChanged}"> <ListBox.ItemTemplate> <DataTemplate> <StackPanel Orientation="Horizontal" Margin="0,10,0,0"> <TextBox Text="{Binding X}" MinWidth="35" MaxWidth="35"/> <TextBox Text="{Binding Y}" MinWidth="35" MaxWidth="35"/> </StackPanel> </DataTemplate> </ListBox.ItemTemplate> /ListBox>

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• Set button content in a label (custom control)

  - by user1881207

  Instead of voting negative this question, answer to tell me what's wrong! I want to set the Button Content in a label in the custom control, because when I use it, the Content property is not visible and the button is empty (no text). <Button x:Class="WpfApplication1.UserControl1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" mc:Ignorable="d" d:DesignHeight="35" d:DesignWidth="273" Content="Button"> <Button.Template> <ControlTemplate> <Grid> <Rectangle Name="rGridBack" StrokeThickness="1"> <Rectangle.Fill> <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0"> <GradientStop Color="#FF4D4D4D" Offset="1" /> <GradientStop Color="#FF404040" Offset="0" /> </LinearGradientBrush> </Rectangle.Fill> <Rectangle.Stroke> <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0"> <GradientStop Color="#FF4F4F4F" Offset="0" /> <GradientStop Color="#FF5B5B5B" Offset="1" /> </LinearGradientBrush> </Rectangle.Stroke> </Rectangle> <Rectangle Fill="#FF1E1E1E" Margin="1,1,1,1" Name="rThickness" /> <Rectangle Margin="2,2,2,2" Name="rGridTop" StrokeThickness="1"> <Rectangle.Fill> <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0"> <GradientStop Color="#FF68686C" Offset="0" /> <GradientStop Color="#FF474747" Offset="1" /> </LinearGradientBrush> </Rectangle.Fill> <Rectangle.Stroke> <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0"> <GradientStop Color="#FF7F7F7F" Offset="0" /> <GradientStop Color="#FF575757" Offset="1" /> </LinearGradientBrush> </Rectangle.Stroke> </Rectangle> <!--This label is where I want to set the Button.Content property--> <Label FontWeight="Normal" Foreground="White" HorizontalContentAlignment="Center" Name="tblckStep1Desc" Padding="0" VerticalContentAlignment="Center"> <Label.Effect> <DropShadowEffect BlurRadius="2" Color="Black" Direction="330" Opacity="0.7" ShadowDepth="1.5" /> </Label.Effect> </Label> </Grid> <ControlTemplate.Triggers> <Trigger Property="Button.Content" Value=""> <Setter Property="Content" TargetName="tblckStep1Desc"> </Setter> </Trigger> <Trigger Property="UIElement.IsMouseOver" Value="True"> <Setter Property="Shape.Fill" TargetName="rGridTop"> <Setter.Value> <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0"> <GradientStop Color="#FF838383" Offset="0" /> <GradientStop Color="#FF545454" Offset="1" /> </LinearGradientBrush> </Setter.Value> </Setter> <Setter Property="Shape.Stroke" TargetName="rGridTop"> <Setter.Value> <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0"> <GradientStop Color="#FF595959" Offset="1" /> <GradientStop Color="#FF929292" Offset="0" /> </LinearGradientBrush> </Setter.Value> </Setter> <Setter Property="Shape.Stroke" TargetName="rGridBack"> <Setter.Value> <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0"> <GradientStop Color="#FF414141" Offset="0" /> <GradientStop Color="#FF565656" Offset="1" /> </LinearGradientBrush> </Setter.Value> </Setter> <Setter Property="Shape.Fill" TargetName="rThickness"> <Setter.Value> <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0"> <GradientStop Color="#FF181818" Offset="1" /> <GradientStop Color="#FF181818" Offset="0" /> </LinearGradientBrush> </Setter.Value> </Setter> </Trigger> <Trigger Property="UIElement.IsEnabled" Value="False"> <Setter Property="Shape.Fill" TargetName="rGridTop"> <Setter.Value> <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0"> <GradientStop Color="#FF68686C" Offset="0" /> <GradientStop Color="#FF474747" Offset="1" /> </LinearGradientBrush> </Setter.Value> </Setter> <Setter Property="Shape.Stroke" TargetName="rGridTop"> <Setter.Value> <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0"> <GradientStop Color="#FF7F7F7F" Offset="0" /> <GradientStop Color="#FF575757" Offset="1" /> </LinearGradientBrush> </Setter.Value> </Setter> <Setter Property="Shape.Stroke" TargetName="rGridBack"> <Setter.Value> <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0"> <GradientStop Color="#FF4F4F4F" Offset="0" /> <GradientStop Color="#FF5B5B5B" Offset="1" /> </LinearGradientBrush> </Setter.Value> </Setter> <Setter Property="Shape.Fill" TargetName="rThickness"> <Setter.Value> <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0"> <GradientStop Color="#FF1E1E1E" Offset="1" /> <GradientStop Color="#FF1E1E1E" Offset="0" /> </LinearGradientBrush> </Setter.Value> </Setter> <Setter Property="Control.Foreground" TargetName="tblckStep1Desc"> <Setter.Value> <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0"> <GradientStop Color="#FF898989" Offset="1" /> <GradientStop Color="#FF898989" Offset="0" /> </LinearGradientBrush> </Setter.Value> </Setter> </Trigger> <Trigger Property="ButtonBase.IsPressed" Value="True"> <Setter Property="Shape.Fill" TargetName="rGridTop"> <Setter.Value> <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0"> <GradientStop Color="#FF313131" Offset="1" /> <GradientStop Color="#FF2E2E2E" Offset="0" /> </LinearGradientBrush> </Setter.Value> </Setter> <Setter Property="Shape.Stroke" TargetName="rGridTop"> <Setter.Value> <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0"> <GradientStop Color="#FF1F1F1F" Offset="1" /> <GradientStop Color="#FF1F1F1F" Offset="0" /> </LinearGradientBrush> </Setter.Value> </Setter> <Setter Property="Shape.Stroke" TargetName="rGridBack"> <Setter.Value> <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0"> <GradientStop Color="#FF414141" Offset="1" /> <GradientStop Color="#FF565656" Offset="0" /> </LinearGradientBrush> </Setter.Value> </Setter> <Setter Property="Shape.Fill" TargetName="rThickness"> <Setter.Value> <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0"> <GradientStop Color="#FF0C0C0C" Offset="1" /> <GradientStop Color="#FF0C0C0C" Offset="0" /> </LinearGradientBrush> </Setter.Value> </Setter> </Trigger> </ControlTemplate.Triggers> </ControlTemplate> </Button.Template> The button is based on Adobe CS5 suite on dialog forms, because a lot of code.

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• Validation L2S question

  - by user158020

  This may be a bit winded because I am new to wpf. I have created a partial class for an entity in my L2S class that is primarily used for validation. It implements the onchanging and onvalidate methods. I am trying to use the MVVM pattern, and in a window/view I have set the datacontext in the xaml: <Window.DataContext> <vm:StartViewModel /> </Window.DataContext> when a user leaves a required field in the view blank, the onchanging event of the partial class is fired when I close the form, not when I save the data. So, if a user leaves the textbox blank, the old value is retained and the onchaging method is fired, but I have no idea how to alert the user of the resulting error. here is my onchanging code in the partial class: partial void Ondocument_titleChanging(string value) { if (value.Length == 0) throw new Exception("Document title is required."); if (value.Length > 256) throw new Exception("Document title cannot be longer than 256 characters."); } throwing an exception doesn't notify the user of the error. it just allows the form to close and rejects the changes to the textbox. hope this makes sense... edit: this example was taken from Scott Guthries article here: http://aspalliance.com/1427_LINQ_to_SQL_Part_5__Binding_UI_using_the_ASPLinqDataSource_Control.5

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• Silverlight 3 data-binding child property doesn't update

  - by sonofpirate

  I have a Silverlight control that has my root ViewModel object as it's data source. The ViewModel exposes a list of Cards as well as a SelectedCard property which is bound to a drop-down list at the top of the view. I then have a form of sorts at the bottom that displays the properties of the SelectedCard. My XAML appears as (reduced for simplicity): <StackPanel Orientation="Vertical"> <ComboBox DisplayMemberPath="Name" ItemsSource="{Binding Path=Cards}" SelectedItem="{Binding Path=SelectedCard, Mode=TwoWay}" /> <TextBlock Text="{Binding Path=SelectedCard.Name}" /> <ListBox DisplayMemberPath="Name" ItemsSource="{Binding Path=SelectedCard.PendingTransactions}" /> </StackPanel> I would expect the TextBlock and ListBox to update whenever I select a new item in the ComboBox, but this is not the case. I'm sure it has to do with the fact that the TextBlock and ListBox are actually bound to properties of the SelectedCard so it is listening for property change notifications for the properties on that object. But, I would have thought that data-binding would be smart enough to recognize that the parent object in the binding expression had changed and update the entire binding. It bears noting that the PendingTransactions property (bound to the ListBox) is lazy-loaded. So, the first time I select an item in the ComboBox, I do make the async call and load the list and the UI updates to display the information corresponding to the selected item. However, when I reselect an item, the UI doesn't change! For example, if my original list contains three cards, I select the first card by default. Data-binding does attempt to access the PendingTransactions property on that Card object and updates the ListBox correctly. If I select the second card in the list, the same thing happens and I get the list of PendingTransactions for that card displayed. But, if I select the first card again, nothing changes in my UI! Setting a breakpoint, I am able to confirm that the SelectedCard property is being updated correctly. How can I make this work???

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• Is it OK to use WPF assemblies in a web app?

  - by Chris

  I have an ASP.NET MVC 2 app targeting .NET 4 that needs to be able to resize images on the fly and write them to the response. I have code that does this and it works. I am using System.Drawing.dll. However, I want to enhance my code so that not only am I resizing the image, but I am dropping it from 24bpp down to 4bit grayscale. I could not, for the life of me, find code on how to do this with System.Drawing.dll. But I did find a bunch of WPF stuff. This is my working/sample code (runs in LinqPad). // Load the original 24 bit image var bitmapImage = new BitmapImage(); bitmapImage.BeginInit(); bitmapImage.UriSource = new Uri(@"C:\Temp\Resized\18_appa2_015.png", UriKind.Absolute); //bitmapImage.DecodePixelWidth = 600; bitmapImage.EndInit(); // Create the destination image var formatConvertedBitmap = new FormatConvertedBitmap(); formatConvertedBitmap.BeginInit(); formatConvertedBitmap.Source = bitmapImage; formatConvertedBitmap.DestinationFormat = PixelFormats.Gray4; formatConvertedBitmap.EndInit(); // Encode and dump the image to disk var encoder = new PngBitmapEncoder(); encoder.Frames.Add(BitmapFrame.Create(formatConvertedBitmap)); using (var fileStream = File.Create(@"C:\Temp\Resized\18_appa2_015_s2.png")) { encoder.Save(fileStream); } It uses System.Xaml.dll, WindowsBase.dll, PresentationCore.dll, and PresentationFramework.dll. The namespaces used are: System.Windows.Controls, System.Windows.Media, and System.Windows.Media.Imaging. Is there any problem using these namespaces in my web application? It doesn't seem right. If anyone knows how to drop the bit depth without all this WPF stuff (which I barely understand, BTW) I would be thrilled to see that too.

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• WPF - List items not visible in Blend when 'DisplayMemberPath' is used

  - by Andy T

  Hi, We're currently working out how to implement MVVM and I've got to the point where I've got the MVVM Light Toolkit set up in blend and can specify dummy data to be supplied if running in Blend. All good. I've created a dummy list of data. The list contains 6 instances of a very simple class called DummyItem which has Age and Name properties. Here's the main code from my 'DummyList' class: public class DummyItem{ public string Name; public int Age; public DummyItem(string name, int age){ this.Name = name; this.Age = age; } } public class DummyList : ArrayList { public DummyList() { this.Add(new DummyItem("Dummy1", 00)); this.Add(new DummyItem("Dummy2", 01)); this.Add(new DummyItem("Dummy3", 02)); this.Add(new DummyItem("Dummy4", 03)); this.Add(new DummyItem("Dummy5", 04)); this.Add(new DummyItem("Dummy6", 05)); } } Here's the operative part of my XAML. The DataContext line does work and points to the correct ViewModel. <Grid x:Name="LayoutRoot"> <ListBox x:Name="ListViewBox" DataContext="{Binding Source={StaticResource Locator}, Path=ListViewModel}" ItemsSource="{Binding TheList}" DisplayMemberPath="Name"> </ListBox> </Grid> The problem is, when I add 'DisplayMemberPath', as I have above, then I can no longer see the list items in Blend. If I remove 'DisplayMemberPath', then I see a list of objects (DummyItem) with their full path. When the app is run, everything works perfectly. It's just that in Blend itself I cannot see the list items when I use 'DisplayMemberPath'. Anyone know why I can't see the items inside Blend itself when I use DisplayMemberPath? Thanks! AT

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• Strange Behaviour in DataGrid SilverLight 3 Control

  - by Asim Sajjad

  Here is the my Xaml Code. Here I have changed the Foreground of the cell depending on the current age of the person. <data:DataGridTemplateColumn Header="First Name" Width="150" MinWidth="150" CanUserReorder="False" SortMemberPath="FirstName"> <data:DataGridTemplateColumn.CellTemplate> <DataTemplate > <TextBlock Foreground ="{Binding Path=DateOfBirth,Mode=OneWay,Converter={StaticResource CellColor}}" Text="{Binding FirstName}" ToolTipService.ToolTip="{Binding FirstName}" FontFamily="Arial" FontSize="11" VerticalAlignment="Center" Margin="5,0,0,0" /> </DataTemplate> </data:DataGridTemplateColumn.CellTemplate> </data:DataGridTemplateColumn> <data:DataGridTextColumn Foreground ="{Binding Path=DateOfBirth,Mode=OneWay,Converter={StaticResource CellColor}}" Header="Last Name" Width="150" MinWidth="150" Binding="{Binding LastName}" CanUserSort="True" IsReadOnly="True" CanUserReorder="False"/> When I run the above code it return following Exception AG_E_PARSER_BAD_PROPERTY_VALU My question is that when I remove the Foreground converter from the DataGridTextColumn Column it runs fine As the Foreground converter is applied in the DataGridTemplateColumn Column which will not through excepction. But when I used same Converter to the DataGridTextColumn it throw execption why, can anyone know why is th is behaviour thanks in advance.

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• wpf 4 datagrid not highlighting row.

  - by SteveCav

  I have a shiny new wpf 4 datagrid, and no matter what I do I can't make the row highlight when the user clicks on a cell. It works on the empty "new record" row on the bottom, but not on rows with data (yes I've tried with and without readonly). My XAML is: <DataGrid AutoGenerateColumns="False" Background="Beige" Height="353" SelectionUnit="FullRow" SelectionMode="Single" AlternatingRowBackground="lightcyan" HorizontalAlignment="Left" Name="dgJobs" VerticalAlignment="Top" Width="1160"> <DataGrid.Columns> <DataGridTextColumn Header="Job ID" Width="80" Binding="{Binding JobID}" IsReadOnly="True"></DataGridTextColumn> <DataGridTextColumn Header="Site" Width="SizeToCells" Binding="{Binding AssetName}" IsReadOnly="True"></DataGridTextColumn> <DataGridTextColumn Header="Category" Width="SizeToCells" Binding="{Binding CategoryName}" IsReadOnly="True"></DataGridTextColumn> <DataGridTextColumn Header="Status" Width="SizeToCells" Binding="{Binding JobStatusDesc}" IsReadOnly="True"></DataGridTextColumn> <DataGridTextColumn Header="Reason" Width="SizeToCells" Binding="{Binding Reason}" IsReadOnly="True"></DataGridTextColumn> </DataGrid.Columns> </DataGrid> Nothing too fancy, it's quite plain really. I had themes enabled because I'm using a Fluent Ribbon elsewhere and it forces you to, but I tried turning that off and it had no effect. I have a 3.5 form in another app which is also very plain and you can highlight the row on it. Why on earth isn't this one working?

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• WPF ComboBox Binding

  - by MadSeb

  Hi So I have the following model: public class Person { public String FirstName { get; set; } public String LastName { get; set; } public String Address { get; set; } public String EMail { get; set; } public String Phone { get; set; } } public class Order { public Person Pers { get; set;} public Product Prod { get; set; } public List<Person> AllPersons { get; set; } public Order(Person person, Product prod ) { this.Pers = person; this.Prod = prod; AllPersons = database.Persons.GetAll(); } } And I have a WPF window used to edit an order. I set the DataContext to Order. public SetDisplay(Order ord) { DataContext = ord; } I have the following XAML: <ComboBox Name="myComboBox" SelectedItem = "{Binding Path=Pers, Mode=TwoWay}" ItemsSource = "{Binding Path=AllPersons, Mode=OneWay}" DisplayMemberPath = "FirstName" IsEditable="False" /> <Label Name="lblPersonName" Content = "{Binding Path=Pers.FirstName}" /> <Label Name="lblPersonLastName" Content = "{Binding Path=Pers.LastName}" /> <Label Name="lblPersonEMail" Content = "{Binding Path=Pers.EMail}" /> <Label Name="lblPersonAddress" Content = "{Binding Path=Pers.Address}" /> However, the binding does not seem to work.......When I change the selected item , the labels do not update .... Regards!! Any reply is appreciated !!

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• First test of a Windows Phone application

  - by Maurizio Reginelli

  I downloaded the Microsoft Visual Studio 2010 Express for Windows Phone and I wrote a simple application to make a first test of the emulator. In this application I have only a button with the property Content binded to a string called ButtonText and with the property Background binded to a SolidColorBrush named FillColor. I handled the Click event with this code: void MyButton_Click(object sender, RoutedEventArgs e) { if (toggle == true) { ButtonText = "Blue"; FillColor = new SolidColorBrush(Colors.Blue); } else { ButtonText = "Red"; FillColor = new SolidColorBrush(Colors.Red); } toggle = !toggle; } Unfortunately this doesn't work. While the Content of the Button changes each time the button is pressed, I cannot say the same for the Background which remains at the same color. Could you tell me what is wrong? Thank you. I also post the XAML: <Grid x:Name="ContentGrid" Grid.Row="1"> <Button Name="MyButton" Width="300" Height="300" Content="{Binding Path=ButtonText}" Background="{Binding Path=FillColor}" /> </Grid>

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• How to determine if the camera button is half pressed

  - by Matthew

  I am creating a small test camera application, and I would like to be able to implement a feature that allows focus text bars to be present on the screen while the hardware camera button is pressed half way down. I created a camera_ButtonHalfPress event to perform the focus action, but I am unsure of how to toggle the text bars I would like to show on the screen accordingly. Essentially, my goal would be to show the text bars while the camera button is pressed half way down, and then remove them if the button is pressed all the way or the button is released before being pressed all the way down. The button being released is the part I am having trouble with. What I have is as follows: MainPage.xaml.cs private void camera_ButtonHalfPress(object sender, EventArgs e) { //camera.Focus(); // Show the focus brackets. focusBrackets.Visibility = Visibility.Visible; } } private void camera_ButtonFullPress(object sender, EventArgs e) { // Hide the focus brackets. focusBrackets.Visibility = Visibility.Collapsed; camera.CaptureImage(); } } Currently, if the the user decides to release the camera button before it is pressed all the way, the focus brackets persist on the screen. How might I fix this issue?

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• Drag and Drop in Silverlight with F# and Asynchronous Workflows

  - by knotig

  Hello everyone! I'm trying to implement drag and drop in Silverlight using F# and asynchronous workflows. I'm simply trying to drag around a rectangle on the canvas, using two loops for the the two states (waiting and dragging), an idea I got from Tomas Petricek's book "Real-world Functional Programming", but I ran into a problem: Unlike WPF or WinForms, Silverlight's MouseEventArgs do not carry information about the button state, so I can't return from the drag-loop by checking if the left mouse button is no longer pressed. I only managed to solve this by introducing a mutable flag. Would anyone have a solution for this, that does not involve mutable state? Here's the relevant code part (please excuse the sloppy dragging code, which snaps the rectangle to the mouse pointer): type MainPage() as this = inherit UserControl() do Application.LoadComponent(this, new System.Uri("/SilverlightApplication1;component/Page.xaml", System.UriKind.Relative)) let layoutRoot : Canvas = downcast this.FindName("LayoutRoot") let rectangle1 : Rectangle = downcast this.FindName("Rectangle1") let mutable isDragged = false do rectangle1.MouseLeftButtonUp.Add(fun _ -> isDragged <- false) let rec drag() = async { let! args = layoutRoot.MouseMove |> Async.AwaitEvent if (isDragged) then Canvas.SetLeft(rectangle1, args.GetPosition(layoutRoot).X) Canvas.SetTop(rectangle1, args.GetPosition(layoutRoot).Y) return! drag() else return() } let wait() = async { while true do let! args = Async.AwaitEvent rectangle1.MouseLeftButtonDown isDragged <- true do! drag() } Async.StartImmediate(wait()) () Thank you very much for your time!

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• Appending string in NSXMLNode

  - by iSight

  Hi, When I call the method setStringValue:mCurrentString when is encountered, the child elements which are already attached to element are detached. Can any one suggest why it is happening so. The sample XML file goes like this: <?xml version="1.0" encoding="UTF-8"?> <Test xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" Version="1.0"> <Page Id="123-234-345-456-567"> <Word/> <Text Id="234-345-456-567-678" Left="120.789" Top="120.234657" Width="300.2390" Height="50.00"> <Content> <![CDATA[<FlowDocument FontFamily="Helvetica" FontSize="24" Foreground="#FFFFFF00" TextAlignment="Left" PagePadding="5,0,5,0" AllowDrop="True" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"><Paragraph><Run FontFamily="Helvetica" FontSize="24" Foreground="FF00B38D" xml:lang="en-gb">This is for Testing purpose</Run></Paragraph>]]></Content> <Stroke Color="#FF00B300" Width="10"/> </Text> <Image Id="345-456-567-678-789" Left="200.345" Top="350.678" Width="200.00" Height="200.00"> <Source>Bear.png</Source> </Image> </Page> <Page Id="345-897-123-756-098" Left="100.90" Top="200.098" Width="200.098" Height="50.09"> <Image Id="756-098-978-685-298" Left="12098" Top="340.87" Right="109.78" Height="100.987"> <Source>Flower.png</Source> </Image> </Page> </Test> This is the method i am using for an NSXMLElement object: [mCurrentElement setStringValue:mCurrentString];// mCurrentString is the string that obtained through delegate method.

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• WPF DataGridRow Template - how to achieve Selected event

  - by user1809972

  I would like to override the DataGridRow template depending on the datatype of object bound to the grid. If the type is label, it just shows a Label. Otehrwise, it shows the cells. Follwing is the xaml. <DataTrigger Binding="{Binding Path=IsLabel, UpdateSourceTrigger=PropertyChanged}" Value="True"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type DataGridRow}"> <Grid> <Label HorizontalAlignment="Center" Padding="3,3,3,3" FontWeight="Bold" Content="{Binding Id}"/> </Grid> </ControlTemplate> </Setter.Value> </Setter> </DataTrigger> The grid looks ok. But, when the Label is clicked, it doesnt raise the Selection changed event for the DataGridRow. How do I achieve this behaviour? This label should just behave as any other DataGridRow(with the default template). Thanks

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• Silverlight 4 ComboBox - Binding to Nullable data (tried TargetNullValue but not working as expected)

  - by Laurence

  (Please note - I am a Silverlight beginner and am looking for the simplest solution here, e.g. that doesn't involve writing/installing a replacement for the ComboBox control!) This is an issue with a Silverlight 4 application that uses the View Model (MVVM) approach. I have a simple form for editing a "Product" object. Product has a CategoryID property which is nullable (int?). A ComboBox is used to view and set the CategoryID - this is bound to an ObservableCollection of Categories. Product also has number of non-nullable properties bound to TextBoxes. I want the user to see "N/A" in the ComboBox for a product with no category, and to be use this "N/A" option to set CategoryID to null. So, I manually added a Category object with CategoryID=0 and CategoryName="N/A" to the collection; then I set TargetNullValue=0 in the SelectedValue Binding of the ComboBox. My thinking was - when the ComboBox SelectedValue was bound to a null CategoryID it would substitute zero, and therefore select the "N/A" option. When editing a Product with a non-null CategoryID, everything works. However when a null CategoryID is found, two problems occur: No option is selected in the ComboBox (its blank) The ComboBox binding seems broken from this point onwards - any Product I subsequently edit (incl. ones with a non-null CategoryID) have nothing selected in the ComboBox (its still populated with all categories - just no selected item). I've seen reports of problem #2 (here, here) but I was under the impression that #1 should have worked. What am I missing to get the "N/A" option to be selected? XAML for ComboBox: <ComboBox x:Name="cboCategory" ItemsSource="{Binding colCategories, Mode=OneWay}" SelectedValuePath="CategoryID" DisplayMemberPath="CategoryName" SelectedValue="{Binding CurrentProduct.CategoryID, Mode=TwoWay, TargetNullValue=0}" Height="24" Width="344"></ComboBox>

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• Binding update on adds news series to WPF Toolkit chart (instead of replacing/updating series)

  - by Mal Ross

  I'm currently recoding a bar chart in my app to make use of the Chart class in the WPF Toolkit. Using MVVM, I'm binding the ItemsSource of a ColumnSeries in my chart to a property on my viewmodel. Here's the relevant XAML: <charting:Chart> <charting:ColumnSeries ItemsSource="{Binding ScoreDistribution.ClassScores}" IndependentValuePath="ClassName" DependentValuePath="Score"/> </charting:Chart> And the property on the viewmodel: // NB: viewmodel derived from Josh Smith's BindableObject public class ExamResultsViewModel : BindableObject { // ... private ScoreDistributionByClass _scoreDistribution; public ScoreDistributionByClass ScoreDistribution { get { return _scoreDistribution; } set { if (_scoreDistribution == value) { return; } _scoreDistribution = value; RaisePropertyChanged(() => ScoreDistribution); } } However, when I update the ScoreDistribution property (by setting it to a new ScoreDistribution object), the chart gets an additional series (based on the new ScoreDistribution) as well as keeping the original series (based on the previous ScoreDistribution). To illustrate this, here are a couple of screenshots showing the chart before an update (with a single data point in ScoreDistribution.ClassScores) and after it (now with 3 data points in ScoreDistribution.ClassScores): Now, I realise there are other ways I could be doing this (e.g. changing the contents of the original ScoreDistribution object rather than replacing it entirely), but I don't understand why it's going wrong in its current form. Can anyone help?

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• placing pop up based on the mouse position(x,y)RSS Feed

  - by prince23

  hi, right now i am showing pop at the botton of the screen. i need to change them according to the value(x,y) whhere i have moved the mouse here i need to get the MouseEventArgs e postion that is its x:value and y:value based on that i need to place the pop up in the screen i need to get the mouse x, y postion? is it possiable to get its value? private void DG_LoadingRow(object sender, DataGridRowEventArgs e) { DataGridRow row = e.Row; int index = 0; foreach (DataGridColumn colGrid in DG.Columns) { if(colGrid .Header == "ID" || colGrid .Header == "Name") { FrameworkElement cellContent = colGrid .GetCellContent(e.Row); DataGridCell cell = cellContent.Parent as DataGridCell; cell.MouseEnter -= cell_MouseEnter; cell.MouseEnter += new MouseEventHandler(cell_MouseEnter); cell.MouseLeave -= cell_MouseLeave; cell.MouseLeave += new MouseEventHandler(cell_MouseLeave); } } } void cell_MouseLeave(object sender, MouseEventArgs e) { //Hide your popup } void cell_MouseEnter(object sender, MouseEventArgs e) { **// here i need to get the mouse position that is its x,y value based on that i can place my modal pop up in that postion. my pop is defined in xaml page here i will be assigning only its position where i need to place my modal pop up.** //

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• State Animation on ListBox ItemTemplate

  - by Peanut

  I have a listbox which reads from Observable collection, and is ItemTemplate'ed: <DataTemplate x:Key="DataTemplate1"> <Grid x:Name="grid" Height="47.333" Width="577" Opacity="0.495"> <Image HorizontalAlignment="Left" Margin="10.668,8,0,8" Width="34" Source="{Binding ImageLocation}"/> <TextBlock Margin="56,8,172.334,8" TextWrapping="Wrap" Text="{Binding ApplicationName}" FontSize="21.333"/> <Grid x:Name="grid1" HorizontalAlignment="Right" Margin="0,10.003,-0.009,11.33" Width="26" Opacity="0" RenderTransformOrigin="0.5,0.5"> <Image HorizontalAlignment="Stretch" Margin="0" Source="image/downloads.png" Stretch="Fill" MouseDown="Image_MouseDown" /> </Grid> </Grid> </DataTemplate> <ListBox x:Name="searchlist" Margin="8" ItemTemplate="{DynamicResource DataTemplate1}" ItemsSource="{Binding SearchResults}" SelectionChanged="searchlist_SelectionChanged" ItemContainerStyle="{DynamicResource ListBoxItemStyle1}" /> In general, my question is "What is the easiest way to do Animation on Particular Items in this listbox As they are selected? Basically the image inside the "grid1" will be setting its opacity to 1, slowly. I would prefer to use states, but I do not know of any way to just tell blend and xaml to "When a selected item is changed, change the image opacity to 1 over a period of .3 seconds". Infact, I have been doing this in the .cs file using the VisualStateManager. Also, there is another issue. When the selected index is changed, we goto the CS file and look at SelectedItem. SelectedItem returns an instance of the Object in which it was bound to (The object inside the observable collection), and NOT an instance of the DataTemplate/ListItem etc. So how am I able to pull the correct image out of this list? State animation with VisualStateManager I can handle fine if its just normal things, but when it comes to generated listboxes' items, I'm lost. Thanks

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• How to display objects with dynamic fields in wpf data grid?

  - by Oliver Hanappi

  Hi! I want to display and edit some objects in a WPF data grid and I'm looking for a good way to do so. All objects I want to display have the same fields, but every execution the fields of my objects can differ. Here is a piece of the interface to illustrate what I mean: public interface IMyObject { IEnumerable<string> GetFieldNames(); IEnumerable<Type> GetFieldTypes(); object GetField(string name); void SetField(string name, object value); } How can I generate a data grid which displays this kind of objects? I thought of XAML generation to define the columns, but I'm still facing the problem of accessing the fields. I think I could realize this with value converters, another option would be to dynamically create a type which exposes the dynamic fields with properties. Are there any other ways and which should I favor? I'm keen on hearing your opinions. Best Regards, Oliver Hanappi

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• WPF: How to bind and update display with DataContext

  - by Am

  I'm trying to do the following thing: I have a TabControl with several tabs. Each TabControlItem.Content points to PersonDetails which is a UserControl Each BookDetails has a dependency property called IsEditMode I want a control outside of the TabControl , named ToggleEditButton, to be updated whenever the selected tab changes. I thought I could do this by changing the ToggleEditButton data context, by it doesn't seem to work (but I'm new to WPF so I might way off) The code changing the data context: private void tabControl1_SelectionChanged(object sender, SelectionChangedEventArgs e) { if (e.Source is TabControl) { if (e.Source.Equals(tabControl1)) { if (tabControl1.SelectedItem is CloseableTabItem) { var tabItem = tabControl1.SelectedItem as CloseableTabItem; RibbonBook.DataContext = tabItem.Content as BookDetails; ribbonBar.SelectedTabItem = RibbonBook; } } } } The DependencyProperty under BookDetails: public static readonly DependencyProperty IsEditModeProperty = DependencyProperty.Register("IsEditMode", typeof (bool), typeof (BookDetails), new PropertyMetadata(true)); public bool IsEditMode { get { return (bool)GetValue(IsEditModeProperty); } set { SetValue(IsEditModeProperty, value); SetValue(IsViewModeProperty, !value); } } And the relevant XAML: <odc:RibbonTabItem Title="Book" Name="RibbonBook"> <odc:RibbonGroup Title="Details" Image="img/books2.png" IsDialogLauncherVisible="False"> <odc:RibbonToggleButton Content="Edit" Name="ToggleEditButton" odc:RibbonBar.MinSize="Medium" SmallImage="img/edit_16x16.png" LargeImage="img/edit_32x32.png" Click="Book_EditDetails" IsChecked="{Binding Path=IsEditMode, Mode=TwoWay}"/> ... There are two things I want to accomplish, Having the button reflect the IsEditMode for the visible tab, and have the button change the property value with no code behind (if posible) Any help would be greatly appriciated.

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• Can you open a form or window in an Outlook Addin (VSTO)

  - by dontpanic

  Hi, I am new to VSTO programming. I have created a basic addin for Outlook 2007 that monitors a folder containing XML text files which it opens and then sends them as an email, then deletes them. this all works fine. I want the user to be able to configure certain settings for the way the addin/program will operate, such as the folder that it will monitor, and other things. The logical way to do this is to create a menu item in the addin (which I have also done) that opens a windows form (or XAML window) that allows them to enter the parameters. In my addin I added a new item Windows Form, which worked, and the designer opened. However, in my addin code I cannot open the form. The Show() method normally associated with form objects is not available. Is this simply something you cannot do, or am I just doing it the wrong way? I have read about Outlook form regions, but these seemed to be attached to outlook items such as a new email, task, appointment etc... there doesnt seem to be a way to create a form region that can be opened in the main window of Outlook. Ideally, I would like to go with my original method of opening a new window from a menu item, but if this isnt possible I would like to hear other solutions. Thanks, Will.

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• Can a page opt out of IIS 7 compression?

  - by Glen Little

  My pages are automatically being compressed by IIS7 with GZIP. That is great... but, for one particular page, I need to stream it to the user, using Response.Flush() when needed. But when the output is being compressed, the IIS server seems to collect all my output until the page is done before compressing and sending it to the client. That nullifies my attempt to Flush the content out to the user. Is there a way that I can have this one page opt out of the compression? One possible option I've determined that if I manually set the content type to one that does not match the IIS configuration at c:\windows\system32\inetsrv\config\applicationhost.config, then IIS will not compress it. Eg. Response.ContentType = "x-text/html". This works okay with IE8, as it falls back to display the HTML. But Firefox will ask the user what to do with the unknown file type. This could work, if there was another Mime Type I could use that browsers would accept as HTML, that is not matched in the applicationhost.config. For reference, these are the mime types that will be compressed: <add mimeType="text/*" enabled="true" /> <add mimeType="message/*" enabled="true" /> <add mimeType="application/x-javascript" enabled="true" /> <add mimeType="application/atom+xml" enabled="true" /> <add mimeType="application/xaml+xml" enabled="true" /> Others options? Are there other options to opt out of compression?

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• How to display combo box as textbox in WPF via a style template trigger?

  - by Greg R

  I would like to display a combobox drop down list as a textbox when it's set to be read only. For some reason I can't seem to bind the text of the selected item in the combo box to the textbox. This is my XAML: <Style x:Key="EditableDropDown" TargetType="ComboBox"> <Style.Triggers> <Trigger Property="IsReadOnly" Value="True"> <Setter Property="Background" Value="#FFFFFF" /> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="ComboBox"> <TextBox Text="{TemplateBinding SelectedItem, Converter={StaticResource StringCaseConverter}}" BorderThickness="0" Background="Transparent" FontSize="{TemplateBinding FontSize}" HorizontalAlignment="{TemplateBinding HorizontalAlignment}" FontFamily="{TemplateBinding FontFamily}" Width="{TemplateBinding Width}" TextWrapping="Wrap"/> </ControlTemplate> </Setter.Value> </Setter> </Trigger> </Style.Triggers> </Style> <ComboBox IsReadOnly="{Binding ReadOnlyMode}" Style="{StaticResource EditableDropDown}" Margin="0 0 10 0"> <ComboBoxItem IsSelected="True">Test</ComboBoxItem> </ComboBox> When I do this, I get the following as the text: System.Windows.Controls.ComboBoxItem: Test I would really appreciate the help!

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• Silverlight 4: StackPanel doesn't resize, when content gets more narrow

  - by Aaginor

  I am using Silverlight 4 with Blend 4. I have a (horizontal) stackpanel that includes some TextBoxes and a Button. The stackpanel is set to stretch to the size that the content uses. The TextBoxes are on autosize too. When I add text to the Textboxes, the textbox size grows and the stackpanel grows too. So far so good. When I remove text from the textboxes, the textbox size shrinks (as excepted), but the stackpanel size doesn't. Is there any trick to make the stackpanel change size, when the content (textboxes) getting smaller? Thanks in advance, Frank Here is the XAML for the UserControl: <Grid x:Name="LayoutRoot"> <StackPanel x:Name="StackPanelBorder" Orientation="Horizontal"> <TextBox x:Name="TextBoxCharacteristicName" TextWrapping="Wrap" Text="Tex"> </TextBox> <TextBox x:Name="TextBoxSep" TextWrapping="Wrap" Text="=" IsReadOnly="True"> </TextBox> <Button x:Name="ButtonRemove" Content="-" Click="ButtonAddOrRemove_Click"> </Button> </StackPanel> </Grid>

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