[.net:wpf] Forum Topics

Hi guys im trying to do a Login system in Wpf with Visual Studio I got the code and DB working fine with Windows Forms in Visual Studio I have changed the code 3 times and they all work on Windows forms but not with Wpf Forms. Below is the …

What are differences between Visibility.Collapsed and Visibility.Hidden in WPF?

System.Windows.Markup.XamlParseException HResult=0x80131501 Message='Add value to collection of type 'System.Windows.Controls.UIElementCollection' threw an exception.' Line number '31' and line position '101'. Source=PresentationFramework StackTrace: at System.Windows.Markup.WpfXamlLoader.Load(XamlReader xamlReader, IXamlObjectWriterFactory writerFactory, Boolean skipJournaledProperties, Object rootObject, XamlObjectWriterSettings settings, Uri baseUri) at System.Windows.Markup.WpfXamlLoader.LoadBaml(XamlReader xamlReader, Boolean skipJournaledProperties, Object rootObject, XamlAccessLevel accessLevel, Uri baseUri) at System.Windows.Markup.XamlReader.LoadBaml(Stream stream, ParserContext parserContext, …

<Grid> < Button Content="Add" HorizontalAlignment="Left" Margin="58,142,0,0" VerticalAlignment="Top" Width="75" Click="Button_Click"/> <TextBox HorizontalAlignment="Left" Height="23" Margin="190,50,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="120" Name="t1" Text=" "/> <TextBox HorizontalAlignment="Left" Height="23" Margin="190,94,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="120" Name="t2"/> <TextBox HorizontalAlignment="Left" Height="23" Margin="190,180,0,0" TextWrapping="Wrap" Text=" " VerticalAlignment="Top" Width="120" Name="t3"/> <Button Content="Sub" HorizontalAlignment="Left" Margin="164,142,0,0" VerticalAlignment="Top" Width="75" Click="Button_Click_1"/> <Button Content="Mul" HorizontalAlignment="Left" Margin="273,142,0,0" VerticalAlignment="Top" Width="75" …

Hi, Could you please help me figure out how I could bind "SelectedItems" of a listbox? Here I have a 'listbox_2' that contains a list of fruits and vegetables ;) There's another 'listbox_1' that contains groups of fruits and vegetables (under a list<of string> format...maybe is it my first error? …

Windows 10 has a nice date and time display in his taskbar, it is becoming more difficult for me to see , unless I open it. Becoming older and older my eyes are not that ‘fresh’ as they used to be, so I decided to make a bigger time display …

Yes, WPF. The learning curve is steep, but what amazing things you can do with it! Look at this hexagon window for instance. Serves no purpose in a business environment I guess, but in a gaming situation it could work. For me, it was just fun to get this up …

In a XAML file you can add a control like a Button and start to edit its attributes like `<Button Width="200" ..`. When you type in Width you get something like `Width="|"` and is rather nice. After typing 200, you end up with `Width="200|"` Does anyone knows a way to …

Hi Everyone, I started creating a new WPF project wherein, I have just added a style to all the elements of type "Window" and "Grid" but none of these are working (rather a wierd black box is apprearing - Screenshot attached). **NOTE:** I do not want to use "x:Key" for …

Dear, I'm really new in c# WPF and I need to develop a program that read a directory with sub-directories and files. For each directory I need to create a form and for each file a button. the directory structure is: c:\dir1 c:\dir2\subdir1\file.pdf c:\dir3\subdir1\file1.pdf c:\dir3\subdir1\file2.pdf C:\dir3\subdir2\file21.pdf If it's possible, how …

Hello Friends, Thanks for helping me for my last queries. Right now I am facing problem on how to implement Auto Update function for my WPF Desktop Application. team decided to use NetSparkle rather than ClickOnce. Any One have Information and Detail about how to use NetSparkle. Please give me …

Hi, I am developing a WPF application in which I need to call `MouseLeftButtonDown` event in a single `DataGridTextColumn`. For that I wrote some xaml code as :- <DataGridTextColumn x:Name="myAge" Header="Age" Binding="{Binding Age, Mode=TwoWay}" IsReadOnly="True" Width="*"> <DataGridTextColumn.CellStyle> <Style TargetType="DataGridCell"> <EventSetter Event="MouseLeftButtonDown" Handler="{Binding MyAgeCommand}" /> </Style> </DataGridTextColumn.CellStyle> </DataGridTextColumn> But I am …

Can someone show me how to use objects of arbitrary classes for declarative field joining. I use Dapfor WPF Grid. I am looking for anyone with an idea of Gridcontrol to assist me.

I have this method that is used to set the columns and data in the listview based on a string. I'm not sure how to add the columns I need programactically. I need to use different data types though. private void populateLeaderBoardList() { string btnContent = (string)btn_exportLeaderBoard.Content; if (btnContent.Contains("Totals")) { …

Hi, I have a WPF Grid with multiple controls like TextBox, ComboBox, CheckBox etc. and their properties like Text, SelectedItem, IsChecked etc. are present inside the view model bound to the view perfectly. I want to copy the values of all the controls to the Clipboard (may be) and want …

Good Day all i am using Navigation service as depicted below <Frame x:Name="_home" NavigationUIVisibility="Hidden" HorizontalAlignment="Stretch" Width="2749" Margin="0,12,0,0" /> and i navigate to the Page like this (Application.Current.MainWindow.FindName("_home") as Frame).Source = new Uri("/F1.xaml", UriKind.Relative); which work fine. now in the Navigated page, lets just say a page shown in the Frame,there …

Forgive me, but I've only really used WinForms in the past, and MVVM and WPF are new to me. For those who use MVVM with WPF, do you actually make separate directories (namespaces) for your Models, Views and ViewModels files or is it more of an abstract idea? I fundamentally …

I am starting a new application for our business to help maintain our client information, so it is going to be a very data driven application. I'm curious, from the standpoint of those who have used both and who may have constructive suggestions on the future direction of development, should …

Hi I'm try to change the background of the matched by a Regex text. Example: input: aaa aaa aaa //double white spaces in between output: aaa aaa aaa //change the background of all matched white spaces to red But it's coloring the wrong text. I have tried and searched google …

Hi there, I have two WPF windows. The first (Window1) has a timer that moves an item down a list, then passes the new current selection to a global variable I defined in App.xaml.cs Window 2 then has another timer that is set to .1 of a second after the …

Hi there, I've created a new C# WPF project. The first MainWindow displays a listbox of images within a folder and displays them inside a larger image object. I am trying to get Window1 to open a fullscreen version of the selected image, that changes depending on what image is …

Hello I want to make a customizable lock screen app. Im trying to make it such that you can access your computer in different ways (like using the accelerometer). I've already managed to use the accelerometer in the WPF app (through a method that allows me to use winRT APIs). …

Howdy So I have a set of data coming back from a process with five different pieces of data per entry in the set. Are there any fancy ways you can generate some kind of look-a-like report on the fly in WCF, else what would be the best way to …

to convert a popular command-line **python** application from python to a C# WPF application. The application in question is http://rg3.github.io/youtube-dl/ I've already done some analyses but am stuck on some python parts so I would like to ask if any enthousiasts would help me out here. (for example can't get …

Hi all, I have a problem i have binding validation in WPF, aplication, but now because some rules some textboxes get disambled, and the validation shows same way, is there a way to disamble the validation when they are disabled and turn on when enabled? Best Regards

I have been following this tutorial (http://www.codeproject.com/Articles/18379/WPF-Tutorial-Part-Writing-a-custom-animation-cla) to try and adjust the Width of one of my Grids upon a Button click. <Grid Grid.Row="2"> <Grid.ColumnDefinitions> <ColumnDefinition Name="leftGrid" Width="7*"/> <ColumnDefinition Name="rightGrid" Width="3*"/> </Grid.ColumnDefinitions> <i:Interaction.Triggers> <ei:PropertyChangedTrigger Binding="{Binding State}"> <ei:GoToStateAction StateName="{Binding State}" /> </ei:PropertyChangedTrigger> </i:Interaction.Triggers> <VisualStateManager.VisualStateGroups > <VisualStateGroup x:Name="VisualStateGroup"> <VisualState x:Name="Expanded"> <Storyboard> <local:GridLengthAnimation …

I have made a WPF application, it has a button to move some files attached to the column cells from one column to another column. The moment when i press button it shows a nice animation and moves all files to the next column cells. But my real problem is …

Hi, I'm getting the following error: NullReferenceExceptionWasUnhandled on `if (messageUserList[i].Contains("_0"))`. I can't seem to find where the data is null. I've tried debugging using breakpoint yet no luck. Basically what I intend to do is get the text from a particular textbox `txtSendMsg` and write it to `messageList` at position …

Hello, I have been programming in windows form application and i'm quite familiar with it. Now i want to code it. I tried but it seem a bit different than winForm appplication < Maybe because of XAML >. Can anyone suggest me some video tutorials, books or anything to get …

I have a multicolumn listview. There are three button Add, delete and Updata. List is working fine, it add, delete and update list data. But i want to save every row inside listview when i click save button. Bellow is my XAML. <TextBox Canvas.Left="12" Canvas.Top="12" Height="23" Name="textBox1" Width="120" TextChanged="textBox1_TextChanged" KeyDown="textBox1_KeyDown" …

I worked on ASP.NET and i use sqldatasource control to add binding in my DataGrid. But now i am making app in WPF C# and there is no sqldatasource in Toolbar. I am using VS2013. I searched online and most of the sites tell to add connection manually in c# …

Hi all, I have a data grid that need to be with the same width of the windows that it is showing, but for some reason i can matain that width. Can anybody give a hand here. Best Regards

Hello All, I am developing an application in WPF in which I need to set a generic input bindings for TAB key for every field present in the view. I somehow managed to create a common method but now I wnat to retrieve on which field the TAB key has …

Hi All, Just wanted to know on how to dynamically set the focus on a TabItem of a TabControl in WPF at runtime using bindings etc. Thanks

I may be very wrong, but in the web world, just installing Bootstrap gives you some basic control over how you controls look. Is there something similar for WPF? I don't seem to find anything, I have a very basic little wpf application with a pageframe, buttons, textblocks and textboxes. …

I've made a rectangle with another 3D point inside. The rectangle is textured with an image. Now, I need to move the point that is inside the rectangle to another 3D position. Does anyone knows how this is possible? The only way I found, that is no good for what …

I have this control on my (wpf)form Status <TextBlock x:Name="Status" HorizontalAlignment="Left" Margin="138,0,0,0" TextWrapping="Wrap" Text="TextBlock" VerticalAlignment="Top" Grid.ColumnSpan="3" Height="67" Width="577" Grid.Row="1" IsHyphenationEnabled="True" UseLayoutRounding="False"/> It seems that just setting Status.Text=someValue from within a click event does not refresh until the event is completed. How can this be done (in C#) if one wants …

I've created a Mortgage Calculator via WPF on visual studio 2012. The design looks like this: Enter Loan amount: TextBox here Enter Loan Duration: 15 years(Radio Button) 30 years(Radio Button) Other(Radio Button) with TextBox Select Interest Rate: ComboBox here Button here to calculate The issue i'm having trouble with coding …

Hello All, I have one webbrowser control and I took a dependency source property from the Internet and binded the same to my string Url. I took this dependency property because .Net doesn't lets you bind the Source property to a string datatype and only Uri datatype. Now I am …

Hi All, I am facing some issues when writing a xaml and my code goes as follows :- <Grid> <Grid.Resources> <!-- Shared Storyboard across the system --> <!-- This storyboard will make the image (button) grow to double its size in 0.2 seconds --> <Storyboard x:Key="expandStoryboard"> <DoubleAnimation Storyboard.TargetProperty="RenderTransform.ScaleX" To="2.5" Duration="0:0:0.2" …

I hope the title is somewhat clear. In windows forms this is pretty straight forward. But for whatever reason in WPF its not the case. I am trying to change the opactiy of 2 labels. Both labels are on seperate windows. Window1 has a button to change opacity of a …

Hi All, I have got one scenario here in which I need to bind a DataGrid to a collection (array, ObservableCollection etc.). My Collection name is "WarningList" and the code is as follows :- **ViewModel :-** WarningList = {({result.WarningMsgCode, result.WarningColor})} **xaml :-** <data:DataGrid x:Name="gridSystemWarnings" Grid.Row="2" Grid.Column="1" Grid.ColumnSpan="3" Grid.RowSpan="2" DataContext="{Binding}" IsReadOnly="True" …

I think i went somewhat over my head with a little tool i wanted to make. The idea was to bind certain keys(users choice) to countdown timers and progressbars. But since the keys are never the same i have to save the chosen key for the selected progressbar. So when …

How to display a image on wpf form which string of path are stored on sql server My sql sever is Emp -------- ID int Name nvarchar Surname nvarchar Imagepath varchar(1000)

Anyone help me to create one form with C# WPF which use LINQ TO SQL with SQL Server. WPF -------------------- Form has 2 textbox and 1 image in WPF txtFirstName txtLastName Image SQL Server Database -------------------- tblEmp EmpID - int Firstname - nvarchar(10) Lastname - nvarchar(10) Image - image, varcharmax …

Hi. I am trying to perform a TranslateTransform on an Image using this code: double to; int increment = 2; TranslateTransform tt = new TranslateTransform(); background.RenderTransform = tt; to = Canvas.GetTop(background) + increment; DoubleAnimation da = new DoubleAnimation(to, TimeSpan.FromSeconds(0)); Canvas.SetTop(background, to); tt.BeginAnimation(TranslateTransform.YProperty, da); This works when the Image exists in …

Hello everyone, In my wpf application i have user conrtols like button,rectangle,image etc.. in one side of the window(whole window is divided into 2 canvas panels) i need to implement the functionality where, if i drag any user control and drop it in other area of the window, a new …