Windows Presentation Foundation
A part of the .NET Framework that provides a unified programming model for building line-of-business desktop applications on Windows.
2,678 questions
1 answer
events in custom control in wpf
I've made this user control and it works well, I'm trying to covert it to a Custom Control, but I can't hook up my handler to those 3 events. any help will be appreciated. <Canvas x:Class="SMFU.UserControls.Public.MovableChildCanvas" …
asked 2020-06-11T16:58:09.337+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(297.6, 56.00000000000001%, 38%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EE%3C/text%3E%3C/svg%3E)
essamce
621
Reputation points
commented 2020-06-16T07:29:58.127+00:00
DaisyTian-1203
11,616
Reputation points
3 answers
Clarify INotifyCollectionChanged
I have a TreeView bound to an ObservableCollection with a ViewModel. The TreeView includes folder-like elements that will have child items. Most times opening the app we won't need to view those child items so I'm not filling them in when the app opens,…
asked 2020-06-11T12:01:25.887+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(25.6, 57.99999999999999%, 12%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EKK%3C/text%3E%3C/svg%3E)
Ken Krugh
116
Reputation points
commented 2020-06-16T05:20:16.797+00:00
Peter Fleischer (former MVP)
19,231
Reputation points
1 answer
Memory leak. Class with finalizer
Created a minimal reproducing application. Reproducing conditions: Visual Studio 2017 WPF application Launch the application under the debugger WPF window code (class with finalizer, very busy WPF main thread): code: using…
asked 2020-06-15T10:00:47.693+00:00
Igor Buchelnikov
1
Reputation point
commented 2020-06-15T14:17:58.28+00:00
Peter Fleischer (former MVP)
19,231
Reputation points
2 answers
One of the answers was accepted by the question author.
WPF custom data grid with button
In WPF xaml, I would like to make a custom data grid with button in cell. I want to create button(Say "Add" button) in the last cell of each row as shown in below pic. While pressing "add" button some operation will happen…
asked 2020-06-12T02:24:43.93+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(48, 3%, 14%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAM%3C/text%3E%3C/svg%3E)
Arun Menon
21
Reputation points
accepted 2020-06-15T07:27:56.813+00:00
Arun Menon
21
Reputation points
6 answers
One of the answers was accepted by the question author.
WPF BindingGroup Validation
I am using a StackPanel to host several TextBoxes that have validation rules attached. I also have a StackPanel.BindingGroup validation as follows: <StackPanel.BindingGroup> <BindingGroup Name="ValidateAllFields"…
asked 2020-06-09T02:02:00.597+00:00
Allanjb
246
Reputation points
answered 2020-06-15T04:40:01.893+00:00
Peter Fleischer (former MVP)
19,231
Reputation points
0 answers
Cross Origin Requests not working in Web Browser control - C# - WPF
Hi, I have a Web Browser control in my WPF application and its source is set to an URL that will load few icons and images from different domain than the Origin. All cross domain requests are not working. How can I enable cross domain requests in Web…
asked 2020-06-10T20:35:50.527+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(249.60000000000002, 12%, 34%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EMS%3C/text%3E%3C/svg%3E)
Manigandasuresh S
1
Reputation point
commented 2020-06-15T02:23:17.03+00:00
DaisyTian-1203
11,616
Reputation points
1 answer
How to display 3 single channel array in wpf?
I have 3 IntPtr Pointers of Red, Green, and Blue channels. I need to display these pointers as an RGB image. I know the width and height of the image. If I convert it as a single pointer it takes processing cost. Here is my Conversion Code, public…
asked 2020-06-12T10:31:41.967+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(3.2, 20%, 10%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ETP%3C/text%3E%3C/svg%3E)
Tamil Prakash S
1
Reputation point
answered 2020-06-14T15:41:43.49+00:00
Ken Tucker
5,846
Reputation points
1 answer
Custom Control edit template cause compilation failure in Visual Studio 2019 (version 16.7 Preview 2)
In Visual Studio 2019 version 16.7 Preview 2, while try to edit the template of my custom control using Edit Template option in designer which causes compilation failure due to empty properties fields generated. Please find the code genereate details. …
asked 2020-06-11T03:03:40.413+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(220.8, 23%, 31%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EMS%3C/text%3E%3C/svg%3E)
Magesh Sankar
31
Reputation points
commented 2020-06-12T08:12:22.35+00:00
DaisyTian-1203
11,616
Reputation points
1 answer
One of the answers was accepted by the question author.
TextBlock Right TextAligment Doesn't work inside a ScrollViewer
Hi, Im coding in XAML. Im trying to create a TextBlock inside a ScrollViewer with a Right Textaligment. but no matter what I put, when the text exceeds the width of the TextBlock, It always shows the text from the left to the right. Here is a piece…
asked 2020-06-11T10:54:37.5+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(169.60000000000002, 51%, 26%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EMC%3C/text%3E%3C/svg%3E)
Miguel Cortés Rodríguez
21
Reputation points
commented 2020-06-12T07:35:07.767+00:00
Miguel Cortés Rodríguez
21
Reputation points
1 answer
WPF, XAML, Combobox: Cannot find source for binding with reference
I have some comboboxes that use the same possible input values. Hence I tried to create a style and then set the style on my combo boxes. However, I am getting the error System.Windows.Data Error: 4 : Cannot find source for binding with reference…
asked 2020-06-12T06:23:47.837+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(182.40000000000003, 18%, 27%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EH%3C/text%3E%3C/svg%3E)
hfaun
1
Reputation point
answered 2020-06-12T06:51:32.247+00:00
Peter Fleischer (former MVP)
19,231
Reputation points
0 answers
ColumnSpan in Grid is not working properly when MaxWidth is 0 in VisualStudio 2019 (Version - 16.4.5)
In my project created in VisualStudio 2019 with version 16.4.5, I have some columndefintions in grid and also uses columnspanning. But when I set maxwidth as 0 for some definition, the columndefinitions are not spanned to full width properly. Code…
asked 2020-06-11T11:30:16.9+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(35.2, 85%, 13%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ESP%3C/text%3E%3C/svg%3E)
Shobika Palani
36
Reputation points
commented 2020-06-12T03:57:24.873+00:00
DaisyTian-1203
11,616
Reputation points
2 answers
One of the answers was accepted by the question author.
WPF TextBox Controls - How Hidden touch keyboard in touch screen
When I click TextBox in touch screen, System auto Popup soft Keyboard, What should I do,Hidden popup keyboard? Thanks
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(38.4, 91%, 13%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3E9%3C/text%3E%3C/svg%3E)
1 answer
Setting an Expander toDatagrid programmatically
I'm creating a runtime expander and I want to add to my datagrid. Here's the code: // Creazione Expander var expGrid = new Expander { Name = "exp" }; var expStackPanel = new StackPanel { Name = "expStackPanel", Height = 30,…
asked 2020-06-08T08:28:31.62+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(134.4, 24%, 23%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAS%3C/text%3E%3C/svg%3E)
Alberto Sartori
1
Reputation point
answered 2020-06-09T03:52:36.11+00:00
DaisyTian-1203
11,616
Reputation points
1 answer
WPF using sdk csproj with Desktop bridge
In preparation for converting my WPF app to .net core I changed the csproj to the sdk format. It compiles and run but the installer projects that create the package I use for side loading has an error specifying that my wpf project target net472. It…
asked 2020-06-05T00:20:08.41+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(300.8, 48%, 39%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAS%3C/text%3E%3C/svg%3E)
Avi Stokar
1
Reputation point
commented 2020-06-08T06:32:00.227+00:00
DaisyTian-1203
11,616
Reputation points
1 answer
Need to restrict mouser hover effect on touch action
I have an custom calendar control, I have highlighted day cell on mouser over, I need to restrict the mouse hover color applied to day cell when perform touch action in calendar.Please provide any suggestions on this. c# wpf touch
asked 2020-06-04T18:13:01.827+00:00
Magesh Sankar
31
Reputation points
commented 2020-06-05T08:18:15.027+00:00
Magesh Sankar
31
Reputation points
1 answer
XamlWriter image serialization isssue (InvalidOperationException: Property 'UriSource' or property 'StreamSource' must be set.)
Hi, i am using a ink canvas and added a image to it and then serialize using XamlWriter. Image img = new Image(); BitmapImage img = NImageHelper.GetBitmapImageFromString(ImageData, new Size(src.Width, src.Height)); img.Source = img; string Xml =…
asked 2020-06-03T11:03:49.647+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(144, 98%, 23%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ENK%3C/text%3E%3C/svg%3E)
Naveen Kumar R
1
Reputation point
answered 2020-06-04T06:58:53.383+00:00
DaisyTian-1203
11,616
Reputation points
0 answers
[WPF] Image get disappeared while zooming out image using DeltaManipulation event (pinching)
Hi All, My requirement is to do pinch zooming in WPF platform. For that, i have created simple POC sample according to my requirement and it can be reproduced. Please find the snippets below XAML: <Grid> <Image…
asked 2020-06-02T06:50:11.17+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(316.8, 40%, 40%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EVR%3C/text%3E%3C/svg%3E)
Vignesh Ramesh
1
Reputation point
commented 2020-06-03T09:19:53.45+00:00
DaisyTian-1203
11,616
Reputation points
1 answer
When I use WPF MediaElement loaded a https mp3 resource，and call Play()，error appeared
When I use WPF MediaElement loaded a https mp3 resource，and call Play()，error appeared (when load a http mp3 resource, nothing happened) test link: …
asked 2020-06-03T01:38:24.963+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(291.2, 26%, 38%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ELK%3C/text%3E%3C/svg%3E)
Lakeside Knight
1
Reputation point
commented 2020-06-03T09:08:19.207+00:00
Lakeside Knight
1
Reputation point
1 answer
is there any touch event as like Mouse Wheel event
I have an custom items control , i need to scroll items control to certain distance based on touch scroll action. MouseWheel event continuous triggers based on mouse wheel distance value. I need same in Touch scroll, is there any event to do same like…
asked 2020-06-02T13:34:59.24+00:00
Magesh Sankar
31
Reputation points
answered 2020-06-03T03:00:37.853+00:00
DaisyTian-1203
11,616
Reputation points
1 answer
Dependency property not raising when value assinged in view model
Hai I am trying to create a custom datagrid control with a property called SelectedItem and I am trying to assign some object to this property in my viewmodel. My codes are Custom control public object SelectedItem { …
asked 2020-05-29T17:54:20.277+00:00
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(12.8, 20%, 11%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EBR%3C/text%3E%3C/svg%3E)
Babu R
81
Reputation points
answered 2020-06-02T12:02:20.867+00:00
Peter Fleischer (former MVP)
19,231
Reputation points