csharp

I have a form application that when clicking a menustrip button, it opens an instance of a form. I made this newly opened form a child of other form to make the newly opened form(child) to stay in the borders of this(parent) form. I used form.MdiParent so newly opened form has a parent. If I...

Hello, I am working on a Blazor Server application. I am trying to create and download PDFs as follows. PDF opens in a new browser tab but unfortunately, it is empty. What is wrong with my code? Could you please help? private async Task ReportPDF() { var memoryStream = new...

I'm trying to create a c# framework and a necessity I need is the ability to write with json in C# and if I can how can I go about doing so.

I work on Web API c# web app . I face issue I can't login success although I have same username and password . when make break point on websecurity.login then trace it jump to ModelState.AddModelError so are there are any settings remaining or some configuration not done . public JsonResult...

Although both of the listBoxes **AllowDrop=true** listBox2 does not allow me to drop an item from listbox1 into listBox2. VS 2022 does not give any error, warning or exception handling problem. The problem is that this code does not do what it supposed to do. It does not let me carry 1 item...

Hello everyone. My name is Furkan Gözükara. I am a Ph.D. computer engineer from Turkey. I have a software engineering dedicated Youtube channel named: SECourses : https://www.youtube.com/SECourses I want to share a few of my lecture playlists. The playlists contain the full course for free...

Hello all, I have a little understanding problem with my small C# projects and .Net. If I created a project and set as target .Net 4.8, then on a target machine to which I copy all the files \bin\debug\* must be installed on the .Net 4.8 version? The same goes for the DLL references for...

I work on csharp i get error object reference not set to an instance of an object code give me error var Data = result.items.Select(e => new { PartID = e.create._id, IsUpdated = e.create.error != null && e.create.error.reason !=null && !e.create.error.reason.Contains("document already exists")...

I have a fairly simple WPF app which primarily has 2 datagrid's in two different tabitem's. The datagrid in 1st tabitem has the itemssource PendingBills which is an ICollectionView and it shows some filtered data as per some basic logic The datagrid in 2nd tabitem has the itemssource AllBills...

Hi everyone, I'm making a window, the first image you see is the visual studio editor, the second the program started, but why the heck it destroys the whole layout .. I can't understand if it's a problem with the size of the objects , many are not even displayed 😭 <Window...

I want to Convert a Sketch to a Text

(I USE .NET 5.0) So, i created a post on StackOverFlow but they closed my question due to not have enough braincells. You can see the comment you can have a question already awnsered here: How work and be able to run a function in real time? So i start project that's need real time "update"...

Hello everyone. I will be grateful for your kind help on this one. I am trying to transfer a specific listview column items to a listbox in C#. Heres my effort below. Unfortunately my code rather iterates though only the entry of the specified column and splits it as letters into the listbox...

Dears, Is there any way to put a large file into a memory stream with file with size > 1 GB. knowing thar Read(byte[] buffer , int offset, int count) does not work in large files.

This is just the UI. The logic is fine. static void Main(string[] args) { Console.WriteLine("This is a passwordgenerator."); Console.WriteLine("Enter the length of your password (12 signs recommended): "); int length; try {...

Hello CSharp | C# Developer Community [^] found a runtime message issue Operator '<' cannot be applied to operands of type 'int' and 'object[]' if(MyVariable.GetType()==typeof(System.Boolean)&& MyVariable==false) return; line 1 had to be added and there where no where to be found the...

I've been researching how I could open and display a PDF in WPF, and once it's open, draw on top of it. I have 2 panels, 1 that simulates the Treeview of the pdfs that I am opening and the other panel is where it is displayed, something like the one in the image, obviously it does not have...

This is a trivial problem but I cannot get a solution. I am trying to make my code recognize strings like the following: "PTV1_3000", "ITV3_4000" The sub-string should contain a root-like "PTV", "ITV", "CTV" followed by one or more integer numbers followed by "_". I tried different flavors of...

Basically, I need a plotting library with support of exporting as image that does not utilize System.Drawing.* namespaces, as they are going to be marked as "Windows-only" in .NET 7 (see the link Breaking change: System.Drawing.Common only supported on Windows - .NET). I have already checked...

I am programming a C# blazor game, and there is a method that sets a property in a class. If the button, which calls the method was clicked, on the next page the property will be printed. Here is a simplified example: class A{ public string test {get; set;} } class B{ public void...