fileDrop | A web base ftp interface for a client-to-business setting

In C# WinForms, I could do this

I implemented drag and drop and all works fine except that i can drag from the grid and drop in the same grid which duplicates files. I have tried to look at types of controls or data source but can't seem to figure it out. I tried File.Exists(file) in an if statement but didn't work

What I have tried

What is wrong with my code? Getting a 'Process cannot access the file because it is being used by another process' error msg Is there a way around this. My google-fu was not giving me much luck. I was not able to Move or Copy, and I will take either.

I am trying to have folder of images either converted to a video format I can play and edit frames of or just iterate through the folder and display them. I am using VS, C#, WPF and .NET 4.7.2.

The folder also has a .txt document named "files.txt" that has all of the files in the folder line by line.

Example (Separated by lines, not spaces)-

" frame_000000.jpg frame_000001.jpg frame_000002.jpg frame_000003.jpg frame_000004.jpg frame_000005.jpg ... "

When I drop the folder into the application it begins running.

Here is what I have so far.

I have a WinForms application where I allow users to drag and drop images onto a panel. For now, they need to drop two files at once to add them both. If they drop one and then they want to add another, it just overwrites the first file.

I want to allow them to drop one file at once, and add as many as they want without overwriting them.

Everything seems to be simple and there are quite a few tutorials, but I cannot transfer data (in my case, an image) to a wpf window element. I was able to implement the transfer of an image from one element to another. But when I capture an image (for example, a desktop), when I transfer it to the desired element, the transfer option does not even appear, only a crossed-out circle and does not work out more than one event associated with drop (as if AllowDrop = false)

My code:

XAML

I can get value when I tried this on console using:

I'm trying to create a page where a user can upload a file and select the people they want to email it to. Once they click submit, I prevent page refresh and reset their inputs in the form. Now I want to place their previously entered information into a table on the same page (different section of the page).

I have a form which calls a javascript function (external js file) using a button onclick, and that function makes an AJAX call to another php file. This file checks if the user inputs match with the database. If they do, then I want to place their inputs into the table. Right now, I'm trying to echo javascript code from the php file but it isn't showing up on my page. I'd appreciate if I could get some help with how to fix that.

This is my form:

I have this fileupload component with . All tags inside the component inherit background-color: rgba(121, 211, 255, 0.15); from the .fileover class when a user hovers over with a file from OS to the fileupload area. But I can't get the background color to change for the .ag-center-cols-viewport inside of . I have tried to use ::slotted and ::ng-deep. Last pictures show that background-color: red; works if I change the color inside chrome devtols.

::ng-deep doc

::slotted doc

Any suggestions why this doesn't work?

HTML: