Wpf - Programmatically Set Height Of Row In XAML?
Jul 26, 2009
I'm doing a WPF project and decided to try it out with Visual Basic. So, basically I'm trying to set the height of a row in a Grid. I'm not great at programming but with C# I managed somehow to figure it out, without remembering how. It actually looks like an animation because when clicking the button, the height of one row smoothly goes down to 0. But I'm trying to even reach that property and I can't figure out the context. The row is called "AnimationRow" and I can reach that, but where do I set the height?
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Sep 17, 2009
I need to use the xaml writer to convert in string some controls. What I get is a string like this for example
[code]...
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Jan 7, 2012
Is is possible to do basic mathematical operations like addition, division etc. in XAML?For example, I want to set the height of a button to {Binding ElementName=MW,Path=Height}/2.
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Mar 30, 2012
how can i calculate the width of a circle at top + 1/3 height & top + 2/3 height?
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Apr 9, 2009
I have a treeview and text box below it... is it easy or even possible to allow a user to change the height of the treeview which will automatically change the height of the textbox so there is no gap between them?ie one gets bigger the other gets smaller etc etc
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Jan 8, 2012
I have been watching "absolute video tutorial". In those tutorials when doubled clicked on stuffs like "button" or "textbox", a code page appears named as "mainpage.xaml.cs" but when I use Visual Basics and do the same, on double click a page "mainpage.xaml.vb" appears. In this the coding stuffs are different. And when I write the same codes like in tutorial I get errors.
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Sep 14, 2009
Is there a way to access My.Resources thru Xaml?
Like this
<Image Source="{Binding MyImage,
Source={x:Static my:Resources},
Converter={StaticResource MyBitmapToImageSourceConverter}}" />
[Code]....
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Jul 27, 2009
I was just wondering if it's possible to animate the height of a grid using purely XAML? I looked at this tutorial[url]...
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Dec 8, 2010
I have a data source:
[Code]....
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Feb 4, 2012
How can I implement both of these ObservableCollections in my xaml? I want to have a listview with all my students, and another listview with all my teachers.For now I just made an example student and teacher object. Am I going about this the wrong way. Eventually I will pulling from a datatable, not sure how I would implement it to the ObservableCollection though.
Public Class PersonalViewModel
Public Sub New()
Dim obcollection1 As New ObservableCollection(Of Student)
[Code].....
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May 14, 2011
Following is the code I wrote for generating treeview hierarchy,
For Each k As KeyValuePair(Of String, GenreSet) In GenreSetDictionary
Dim t As New TreeNodeSet
t.Genre = True
[code]....
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Oct 7, 2009
I am new to WPF and XAML. I want to learn these for use in VB express 2008.Please guide me for some tutorials to start and progress in WPF and XAML.
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Feb 18, 2010
I've currently created the class below. For some reason though I can't access the properties I've created through my xaml style.
Public Class Ribbon : Inherits Button
Private mpopDropdown As Popup
Public Property Dropdown() As Popup
[Code].....
but they don't seem to expose the property either. I've also tagged the property as <Bindable(True)> but that didn't seem to do anything.
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Jan 18, 2012
Look at this simple bug :
<textblock (...) Width="0" />
Working great, the textBox appears to be 0px thin. Works with value like, 2, 3, 4...
Now that is NOT working :
<TextBlock (...) />
<TextBlock.Width>
<MultiBinding Converter="{StaticResource WidthConverter}">
[CODE]..................
Why can i set zero value to TextBox.Width in xaml and not in code behind ? By using a converter, when returing 0, the TextBlock.Width is not set to 0 but to "auto", i can read the text
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Sep 14, 2011
I want to bind data to an objectdataprovider.[code]...
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Apr 5, 2012
i created a Xaml screen with a border and a button.
Border - <Border x:Name="SideMenu" MinHeight="40" MaxHeight="400" Height="400" Opacity="0.2" BorderBrush="Black" BorderThickness="2" CornerRadius="5" VerticalAlignment="Top" Margin="1345,0,0,0" HorizontalAlignment="Left" Width="255" Visibility="Collapsed">
[Code]...
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Mar 30, 2010
What I am trying to accomplish: Create a dynamic bubble that expands on height and width depending on the amount of text in the bubble. What I researched so far: In a SO article they described utilizing the measurestring function to figure out the exact width or height so dynamic changes in the .cs to the width and height can be accomplished.
[Code]...
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Mar 5, 2009
here's what I'm trying to do:I have a Storyboard animation for an object done in Expression Blend. What I need is to be able to trigger that animation from the VB.net code
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May 17, 2012
I tried saving data from my rich text box using the TextRange to save in xamlpackage format, however my question is basic, what extension should the file have, if I use Xaml, the normal wpf xaml files would not be capable of opening as they are not xamlpackages
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May 8, 2010
I know I gotta get a book or something because things are just way too hard for me. But before that happens I have what I think should be an easy question.
I want to create a variable in xaml, the angle that a control is currently at, and then use this variable in my VB code (event handler).
Or even better can I, while in VB code, check the current angle a specific control is at so that I can add to the number when setting the new angle?
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Nov 18, 2010
I have a WPF app that is currently driven completely from XAML. All fields, datagrids everything are bound from XAML using ObjectDataProviders objects. I have a DataAccessLayer (DAL) imported into the project. The calls to retrieve data using the ODPs are being used to display the data are all working. Is it possibly to perform inserts, updates, deletes using the methods that exist in my DAL directly from the XAML? I am trying to avoid ANY code-behind here at all to keep the UI a separate entity. I cannot find any clear cut examples with insert, update, deletes on this.
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Sep 9, 2011
I have the below xaml that I am trying to bind to my class. I am having trouble getting the values to show up.
code]...
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Sep 24, 2010
I've gotten to a point where I'm trying to add a ComboBox to a UserControl, and to populate it from a collection which exists in code.
I've been getting along pretty much on monkey-see-monkey-do coding for the most part; copying and adapting existing code in order to get the next stage working, but this DataSource stuff has me stumped. I've been through a whole bunch of articles on MSDN this morning and am no closer to understanding than I was when I started.
Let me go through a few of the things that are messing with me, and hopefully you guys will be able to point me in the right direction:
1) None of the [UserControlName].vb files contains any code. All of the code for the UserControls is stored in [UserControlName]Model.vb files, and then code of the following sort is used:
<UserControl
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:l="clr-namespace:MySolution"
[Code]....
1.5) (using bullet points means I can't use <> brackets or code blocks later on. What the hell, markdown?) Anyway...
2) I'm pretty sure I only want a Static Source for the moment, as the items in the ComboBox aren't going to change during execution, at this time. Problem is, all the articles I can find about this are gigantic, complex things about creating XML readers, and populating DataGridViews and sorting data, and on and on and on. I just want to declare that I'm using a frealing List! A List I've already created in code.
So, yeah, I basically need to use a Public Property ComboBoxLines As List(Of String) from a class which isn't the same class as the UserControl itself as the DataSource for a ComboBox.
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Dec 15, 2009
i'm building a Videoplayer custom control (Project called WpfCustomControlLibrary1) and want to add a Load Command.This is what i have added in my class to get this Command:
Public Class VideoPlayer
Inherits Control
...
Public Shared ReadOnly LoadCommad As RoutedUICommand
....
[code].....
i get an error that he cant convert the string in the Attribute "Command" into an Object of the Type "System.Windows.Input.ICommand
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Jan 25, 2011
Visual Basic 2010. For a school assignment i had to make a application with XAML in it. I made the tutorial Math Quiz when starting up Visual Basic 2010. This was a Windows Form application that only needed VB programming language. Now i made the Math Quiz and finished it but there is no XAML included or what so ever. Can I still convert this to XAML or just see any XAML language somewhere. Cause I need to proove to my Teacher the application I made includes XAML.
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Jun 18, 2012
I am new to WPF and the MVVM design pattern this month, and more than a little out of practice in general. To learn, I've been playing around with textboxes, rectangles, and ways to display them in a window. I began with Ashley Davis' excellent "Simple Drag Selection in WPF" tutorial, which walks through creating a view model for a collection of rectangles, binding a listbox to said collection, and styling the listbox with a canvas, creating a data template for the rectangles, as well as basic "rubber band" selection logic.
I have since built on this tutorial to improve the drag selection so that it behaves much more like selection does in windows explorer, and to allow resizing the rectangles from the corners or edges.All was well until I changed the MainWindow.xaml in an effort to include a column on the side for various buttons and controls, thus moving the "editor surface" grid from inside a 1x1 grid on the main window to a column of a 1x2 grid, moving the data template to the grid's resources (since it will be the only element in the window that needs it). As soon as I did this, subroutines that I wrote which interact with the listbox started misbehaving--rubber band selection no longer works. There's no visual indication that listbox items are being selected (they were highlighted previously), and interrogating listBox.SelectedItems.Count after a drag-selection mouseUp event returns a zero.
After some experimentation, reading many questions on this site and sections of my WPF Unleashed book, and going over the msdn databinding overview, as of this morning I still cannot find my mistake(s). I believe it is a data binding mistake or incorrect data context.Some details about the view models involved:
DataFieldViewModel
...implements INotifyPropertyChanged and exposes properties for its (in this case a rectangle and a textbox) X,Y position, width, height, visibility, and selection status (a way to track it across several rubber band selection operations)
PageViewModel
...implements INotifyPropertyChanged, and has among other things an ObservableCollection of type DataFieldViewModel, called DataFields, and exposes it as a ReadOnly Property.Here's a look at MainWindow.xaml.vb and one of the broken subs:
Namespace EditorUI
'
' The main window of the editor.
[code]....
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Nov 16, 2010
I am trying to modify the MethodParameter directly in the XAML. I do have a working example where I am setting it from code. Code version is:
Dim odp As New ObjectDataProvider()
odp = FindResource("Products")
odp.MethodParameters.Clear()
odp.MethodParameters.Add(CType(txtCatId.Text, Integer))
ObjectDataProvider defined in XAML looks like this:
[Code]...
Is there anyway I can retrieve the value of my textbox (which is bound to a separate ObjectDataProvider and put that in place of the hardcoded "0" currently in my XAML? I am looking to have this be completely XAML driven and have not been able to get it working without the code change.
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Jun 20, 2011
I am having problems finding an named object declared in XAML in my codebehind file.I want to initalize a ViewModel from inside my View. However I also need a reference to the ViewModel in my code behind file (basically for navigation support, handling events, etc. that I cannot do easily from my ViewModel)[code]However I get a null reference exception when I'm trying to access the ViewModel in my code behind:[code]Some more research shows that the FindName call for "ViewModel" in InitalizeComponent returns null. I tried reading up on XAML namescopes etc. but as far as I see, this should be a simple case and just work, no?
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Apr 22, 2010
I have defined a StringCollection in the Project Settings.I want to use the values in a ComboBox.Is there a way to access it xamly?
I tried:
<CollectionViewSource Source="{x:Static src:MySettings.Default.MyCollection}" />
<CollectionViewSource
[code]....
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Sep 30, 2009
I am trying to bind a few values in xaml to variables declared in the code behind.
e.g.
vb.net
dim test as integer = 2
[code]....
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