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  • C# Custom Brush - I want two gradients chaining them together.

    - by Logan
    I am making a bar chart and I want two separate gradients for each bar. First I want a gradient to go from top to bottom solid red to transparent red. I want to paint over the top of that a gradient that goes from right to left, black to opaque. So - In the bottom left we should have; Bottom left - Alpha 0 Bottom right - Alpha 0 Top left - Alpha 255 Colour Red Top Right - Alpha 255 Colour Black So in effect I want to take a solid colour, add a left to right gradient to black then take the output of that and add a top to bottom gradient to transparency. All this and I want it to be in a single brush, is this even possible? Thanks!

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  • C# Dataset Dynamically Add DataColumn

    - by Wesley
    I am trying to add a extra column to a dataset after a query has completed. I have a database relationship of the following: Employees / \ Groups EmployeeGroups Empoyees holds all the data for that individual, I'll name the unique key the UserID. Groups holds all the groups that a employee can be a part of, i.e. Super User, Admin, User; etc. I will name the unique key GroupID EmployeeGroups holds all the associations of which groups each employee belongs too. (UserID | GroupID) What I am trying to accomplish is after querying for a all users I want to loop though each user and add what groups that user is a part of by adding a new column to the dataset named 'Groups' which is a string to insert the values of the next query to get all the groups that user is a part of. Then by user of databinding populate a listview with all employees and their group associations My code is as follows; Position 5 is the new column I am trying to add to the dataset. string theQuery = "select UserID, FirstName, LastName, EmployeeID, Active from Employees"; DataSet theEmployeeSet = itsDatabase.runQuery(theQuery); DataColumn theCol = new DataColumn("Groups", typeof(string)); theEmployeeSet.Tables[0].Columns.Add(theCol); foreach (DataRow theRow in theEmployeeSet.Tables[0].Rows) { theRow.ItemArray[5] = "1234"; } At the moment, the code will create the new column but when i assign the data to that column nothing will be assigned, what am I missing? If there is any further explination or information I can provide, please let me know. Thank you all

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  • How can I unattach an element from another element in the XAML tree?

    - by Edward Tanguay
    In my Silverlight application, I load all the images I need at application start and store them in a dictionary. Then as I need them I pick them out of the dictionary and attach them in XAML trees etc. However, I have the problem that if I attach an Image object to a Grid, then want to use that image again, it tells me: The image element is already a child of another element. How can I run through my dictionary and "detach all images from parent XAML elements"?

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  • Using CreateOrthographicOffCenter in XNA

    - by Jeffrey Kern
    I'm trying to figure out how to draw graphics in XNA, and someone else suggested this. But before I attempt to use this... If I create and use this camera, and set LEFT,TOP to 0 and WIDTH=256 and HEIGHT=240, anything I render to the screen will use these coordinates? So a box with a width and height of 1, if set to 0,0 will take up space from 0,0 to 1,1?

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  • DoubleAnimationUsingKeyFrames In C#

    - by Asim Sajjad
    Any one there you have used DoubleAnimationUsingKeyFrames in C# can he/she provide example code or link where I can find the solution. I know how to do in xaml but I want to do it in code using C#. how can i convert following xaml to C# <Storyboard x:Key="Storyboard1"> <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="border" Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[3].(TranslateTransform.X)"> <SplineDoubleKeyFrame KeyTime="00:00:00" Value="0"/> <SplineDoubleKeyFrame KeyTime="00:00:00.2000000" Value="100"/> </DoubleAnimationUsingKeyFrames> </Storyboard> thanks in advance

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  • Call Method from LinQ query.

    - by Jitendra Jadav
    Hello Everybody, I am using Linq query and call method Like.. oPwd = objDecryptor.DecryptIt((c.Password.ToString()) it will return null value. Means this will not working. how I Resolve this. Thanks.. var q = from s in db.User join c in db.EmailAccount on s.UserId equals c.UserId join d in db.POPSettings on c.PopSettingId equals d.POPSettingsId where s.UserId == UserId && c.EmailId == EmailId select new { oUserId = s.UserId, oUserName = s.Name, oEmailId = c.EmailId, oEmailAccId = c.EmailAccId, oPwd = objDecryptor.DecryptIt(c.Password.ToString()), oServerName = d.ServerName, oServerAdd = d.ServerAddress, oPOPSettingId = d.POPSettingsId, };

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  • How to programatically create a xaml panel with controls

    - by randy
    Hello, Is it possible to programatically create a new panel within a current document that contains duplicate elements? For example when the window loads I have a grid (one row) with three text fields, Fname01, Lname01, and DOB01, I would like to have a button that when clicked would append a new row to the grid with three new fields (Fname02, Lname02, and DOB02). Each time the button is clicked (addrow) a new row would be created. I am also interested to learn how these fields are identified within the xaml that would allow me to databind or programatically reference the created fields for insertion of the values into a database etc. Thank you in advance,

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  • Programmatically Binding to a Property

    - by M312V
    I know it's a generic title, but my question is specific. I think it will boil down to a question of practice. So, I have the following code: public class Component : UIElement { public Component() { this.InputBindings.Add(new MouseBinding(SomeCommandProperty, new MouseGesture(MouseAction.LeftClick))); } } I could easily aggregate the ViewModel that owns SomeCommandProperty into the Component class, but I'm currently waiving that option assuming there is another way. Component is a child of ComponentCollection which is child of a Grid which DataContext is the ViewModel. ComponentCollection as the name suggests contains a collection of Components. <Grid Name="myGrid"> <someNamespace:ComponentCollection x:Name="componentCollection"/> </Grid> It's the same scenario as the XAML below, but with TextBlock. I guess I'm trying to replicate what's being done in the XAML below programatically. Again, Component's top most ancestor's DataContext is set to ViewModel. <Grid Name="myGrid"> <TextBlock Text="SomeText"> <TextBlock.InputBindings> <MouseBinding Command="{Binding SomeCommandProperty}" MouseAction="LeftClick" /> </TextBlock.InputBindings> </TextBlock> </Grid> Update 1 Sorry, I'm unable to comment because I lack the reputation points. Basically, I have a custom control which inherit from a Panel which children are a collection of Component. It's not a hack, like I've mentioned, I could directly have access to SomeCommandProperty If I aggregate the ViewModel into Component. Doing so, however, feels icky. That is, having direct access to ViewModel from a Model. I guess the question I'm asking is. Given the situation that Component's parent UIElement's DataContext is set to ViewModel, is it possible to access SomeCommandProperty without Component owning a reference to the ViewModel that owns SomeCommandProperty? Programatically, that is. Using ItemsControl doesn't change the fact that I still need to bind SomeCommandProperty to each Items.

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  • Change the color of a SolidcolorBrush resource with a trigger?

    - by HolySamosa
    I have a user control that uses a brush resource like the following to provide the color for several elements in the control: <UserControl.Resources> <SolidColorBrush x:Key="BlackBrush" Color="Black"/> </UserControl.Resources> Now, I'd like to change the color of this resource with a trigger to provide a highlight when a certain condition occurs. Is this possible? If so, how? Thanks!

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  • Best method for Binding ComboBox

    - by LnDCobra
    I am going to be developing a large project which will include a large number of ComboBoxes. Most of these combo boxes will be bound to a database field which is a related to another daataset/table. For instance. I have the following 2 tables: Company {CompanyID, CompanyName, MainContact} Contacts {ContactID, ContactName} And when the user clicks to edit a company, A TextBox will be there to edit a company name, but also a ComboBox will be there. The way I am currently doing it is binding the ComboBox to the Contacts dataset, and manually updating the Company MainContact field in code behind. Is there anyway for me to bind the selected item to the Company MainContact field in XAML and the items to the ContactName and eliminate the code behind? Reason for this is when you start making 100's combo boxes all over the application it gets long winded each time creating code behind to do the update.

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  • User Control - dependency property to Change Image Issues

    - by mflair2000
    i'm having issues setting the Image from a dependency property. It seems like the trigger doesnt fire. I just want hide/show and image, or set the source if possible. public static readonly DependencyProperty HasSingleValueProperty = DependencyProperty.Register("HasSingleValue", typeof(bool), typeof(LevelControl), new FrameworkPropertyMetadata(false,FrameworkPropertyMetadataOptions.BindsTwoWayByDefault)); public bool HasSingleValue { get { return (bool)GetValue(HasSingleValueProperty); } set { SetValue(HasSingleValueProperty, value); } } public LevelControl() { this.InitializeComponent(); //this.DataContext = this; LayoutRoot.DataContext = this; } //Control Markup <Grid x:Name="LayoutRoot"> <Image x:Name="xGreenBarClientTX" HorizontalAlignment="Stretch" Height="13" Margin="7,8.5,7,0" Stretch="Fill" VerticalAlignment="Top" Width="47" Canvas.Left="181.67" d:LayoutOverrides="Height" > <Image.Style> <Style TargetType="{x:Type Image}"> <Style.Triggers> <DataTrigger Binding="{Binding HasSingleValue}" Value="True"> <Setter Property="Opacity" Value="100"/> </DataTrigger> <DataTrigger Binding="{Binding HasSingleValue}" Value="False"> <Setter Property="Opacity" Value="0"/> </DataTrigger> </Style.Triggers> </Style> </Image.Style> </Image>

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  • Closing a window when it's "no longer needed".

    - by Mason Blier
    This is kind of a hard question to describe, and I've searched for about an hour now to no avail. Essentially, picture a small 'flyout' window like the Windows 7 Wireless Control or the Volume Slider from the system tray(notification area). When you click on the icon, the application pops up with focus, and if you click off of it, the window destroys itself. I thought it woudl be easily solved by simply having my window destroy it self when it loses focus (I've been listening for WM_KILLFOCUS), but the problem is, if the icon is clicked, my window does not always get focus. Since this isn't the case, if the user clicks my icon, and then clicks away because it was a mistake (on the desktop say), then how can I set my app to close? I've tried messing with SPY++ but checking the volume control / wireless control apps are proving difficult as they disappear when I try to get their window/process handles. Thanks!

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  • 'Auto' option missing for TreeView subclass

    - by Jared
    I've created a custom control that subclasses TreeView. Right now it's completely empty, doesn't override anything. However when I place an instance in the designer the 'Auto' value for the Width and Height fields is no longer available as it is with the default TreeView. What am I missing?

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  • Same html file for different topics on Help Files

    - by Gpoy Gwapo
    I have a problem with the help files. For example i have this html file named search.html and there are 2 topics on my table of contents namely Name Search and Account Search. The same search.html will be used for the 2 topics. Now, i want to open the help file and point it to Name Search but instead, the treeview item that is opened on the table of contents is for the Account Search. How can i set it so that the the Name Search will be the one selected on the table of contents?

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  • Interpolating height for a point inside a grid based on a discrete height function.

    - by fastrack20
    Hi, I have been wracking my brain to come up with a solution to this problem. I have a lookup table that returns height values for various points (x,z) on the grid. For instance I can calculate the height at A, B, C and D in Figure 1. However, I am looking for a way to interpolate the height at P (which has a known (x,z)). The lookup table only has values at the grid intervals, and P lies between these intervals. I am trying to calculate values s and t such that: A'(s) = A + s(C-A) B'(t) = B + t(P-B) I would then use the these two equations to find the intersection point of B'(t) with A'(s) to find a point X on the line A-C. With this I can calculate the height at this point X and with that the height at point P. My issue lies in calculating the values for s and t. Any help would be greatly appreciated.

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  • DataTriggered animation is triggered only in the first time

    - by Pavel
    I just wanted to create very simple example of DataTriggers and animation. Two checkboxes and Rectangle. Checking the first cb makes the rectangle fade away. (CodeBehind var is true) Checking the second cb makes the rectangle come back. (var is false) App is loading - the rectangle is showing (true) Firs cb is checked by default. I'm checking second cb - rect is dissapearing. It's OK. But when I then check the first cb rect isn't showing up. But checking the second cb still makes rect show up and fade away. here's my xaml and code behind: <StackPanel> <RadioButton IsChecked="True" Checked="RadioButton_Checked"></RadioButton> <RadioButton Checked="RadioButton_Checked_1"></RadioButton> <Rectangle Name="r1" Width="100" Height="300" Fill="Green"> <Rectangle.Style> <Style TargetType="Rectangle"> <Style.Triggers> <DataTrigger Binding="{Binding Active}" Value="True"> <DataTrigger.EnterActions> <BeginStoryboard> <Storyboard> <DoubleAnimation Storyboard.TargetProperty="Opacity" From="0" To="1" Duration="0:0:1" /> </Storyboard> </BeginStoryboard> </DataTrigger.EnterActions> </DataTrigger> <DataTrigger Binding="{Binding Active}" Value="False"> <DataTrigger.EnterActions> <BeginStoryboard> <Storyboard> <DoubleAnimation Storyboard.TargetProperty="Opacity" From="1" To="0" Duration="0:0:1" /> </Storyboard> </BeginStoryboard> </DataTrigger.EnterActions> </DataTrigger> </Style.Triggers> </Style> </Rectangle.Style> </Rectangle> </StackPanel> public bool Active { get { return (bool) GetValue(ActiveProperty); } set { SetValue(ActiveProperty, value); } } public static readonly DependencyProperty ActiveProperty = DependencyProperty.Register("Active", typeof(bool), typeof(MainWindow), new UIPropertyMetadata(false)); private void RadioButton_Checked(object sender, RoutedEventArgs e) { Active = true; } private void RadioButton_Checked_1(object sender, RoutedEventArgs e) { Active = false; }

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  • What is the most mature library to render equirectangular images in Flash?

    - by Dave Viner
    I have a series of equirectangular images. I'd like to display them in a custom Flash player so that the user could see the spherical nature of the images, and "look up", "look down", "look left/right" (or pan, zoom, etc). (Note that I have a long series of images, so the library must allow for dynamic loading of the images themselves, rather than having the images "baked" into the SWF player.) What is the best library to manage the display of the equirectangular images in Flash? By "best", I mean the most mature, most reliable, most robust, and fastest performing. For reference, an example of an equirectangular image can be found at http://archive.bigben.id.au/tutorials/360/background/projections.html.

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  • Dispatcher.CurrentDispatcher?

    - by Mark
    If I do this... public PriorityQueue(Dispatcher dispatcher = null) { this.dispatcher = dispatcher ?? Dispatcher.CurrentDispatcher; } And then use it in a ViewModel (without passing any args) that is created through the XAML, this.dispatcher will point to the UI thread right?

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  • How can I bind dynamic data to DataGridTemplateColumn in code?

    - by TuomoT
    I'm using DataGrid from CodePlex. I have objects (ICustomTypeDescriptor) that have properties 'name' 'description' 'c' 'd' and so on (the names are dynamic, and so is the value) and they have information behind them. I have templates for different types. And if I have to list the properties of a single element I can just bind to the values in xaml and use datatemplateselector (in datagridtemplatecolumn) which will pick the correct template. However, when I'm listing several of the elements, how can I use the selectors and the templates? How do I get the correct property bound to the template (two-way)? When ignoring the need for different templates, using DataGridTextColumn with bindings is very simple (and works, see example below), is there any way to use similar approach with the DataGridTemplateColumn? foreach (String propertyName in listOfPropertyNames) { DataGridTextColumn textColumn = new DataGridTextColumn() { Header = propertyName, Binding = new Binding() { Path = new PropertyPath(propertyName) } }; DataGrid.Columns.Add(textColumn); }

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  • CommandManager "cannot resolve symbol"

    - by Budda
    After adding "RelayCommand" class (that uses CommandManager class) into my Silverlight App I've got an error: The name 'CommandManager' does not exist in the current context This class is a member of System.Windows.Input namespace that is in PresentationCore.dll assembly. The problem is that I can't add this dll into my app... I am having a strange assumption: this class (CommmandManager) can't be used in the Silverlight. Am I right? How can I implement MVVM-pattern (http://msdn.microsoft.com/en-us/magazine/dd419663.aspx)? Thanks.

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  • How do I determine inactivity in a MVVM application?

    - by Jordan
    I have an MVVM kiosk application that I need to restart when it has been inactive for a set amount of time. I'm using Prism and Unity to facilitate the MVVM pattern. I've got the restarting down and I even know how to handle the timer. What I want to know is how to know when activity, that is any mouse event, has taken occurred. The only way I know how to do that is by subscribing to the preview mouse events of the main window. That breaks MVVM thought, doesn't it? I've thought about exposing my window as an interface that exposes those events to my application, but that would require that the window implement that interface which also seems to break MVVM.

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  • Puzzle - Dynamically change data template control from another data template

    - by Burt
    I have a DataTemplate that contains an Expander with a border in the header. I want the header border to have round corners when collapsed and straight bottom corners when expanded. What would best practice be for achieving this (bonus points for code samples as I am new to XAML)? This is the template that holds the expander: <DataTemplate x:Key="A"> <StackPanel> <Expander Name="ProjectExpander" Header="{Binding .}" HeaderTemplate="{StaticResource B}" > <StackPanel> <Border CornerRadius="0,0,2,2"> This is the expander datatemplate: <DataTemplate x:Key="B"> <Border x:Name="ProjectExpanderHeader" CornerRadius="{Binding local:ItemUserControl.ProjectHeaderBorderRadius, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type ContentPresenter}}}" Background="{StaticResource ItemGradient}" HorizontalAlignment="{Binding HorizontalAlignment, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type ContentPresenter}}, Mode=OneWayToSource}"> <local:ItemContentsUserControl Height="30"/> </Border> </DataTemplate>

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