Questions tagged [vb.net]

Visual Basic .NET (VB.NET) is an object-oriented computer programming language that can be viewed as an evolution of Microsoft's Visual Basic 6 (VB6) but implemented on the Microsoft .NET Framework.

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16 views

Organizing and accessing data in xml database - VB.Net

So I made an XML database for my music player where I store songs data (title,artist,album,genre,year) the code for generating the database is working but slow as heck, the code works as following ...
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39 views

Addition/removal of entities in EF6 many-to-many architecture

Is there a way to do this many-to-many update with less code? It feels awfully bulky to me. I started out using AutoMapper to avoid the explicit value assignments, but then the mapped ...
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42 views

I want to clean up this console app calculator (VB.net)

Getting started in VB.net I've written this console calculator based heavily off Nicholas Dingle youtube channel (in case it looks familiar). What I want to do is have a separate sub called ...
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1answer
25 views

VB.net SQL match against Excel data to datagridview

I am importing an Excel sheet where the first column will contain product numbers. I match those numbers to my SQL database and display the product number and description of the matching products to a ...
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2answers
53 views

Returning employee balances

Here is the code for balance retrieval from EMPLOYEES record. Please simplify and improve it accordingly. It is working fine and I have no problem with it but I believe that's not the correct way to ...
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1answer
34 views

String Concatenation and Comparison

I have the below code. I have list of status which contain may contain 4 values. R,UR,DO,NDO based on this list. i need to convert to Y,N values If list contains R the Readstatus="Y" If list ...
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1answer
66 views

Calculate draws faster in VB.Net [closed]

I created this calculation algorithm, unfortunately, it works a little hard for more combinations. How should it be improved for faster operation? ...
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0answers
87 views

Creating SQL Server Database Users Dynamically from User Input

The Application I have an application in testing that runs off of an MS SQL Server database. The app allows users to authenticate using Windows authentication (that is, using the Windows username the ...
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0answers
38 views

Password validation class using database values

I have a password validation class that takes values from our database and depending on their values, checks if the password is valid. If it is not, I built an error message containing everything that ...
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0answers
30 views

Retrieving Registry nodes for HKLM

I am using the below code to retrieve nodes and values. It is taking 20 mins to retrieve the nodes and values of HKLM. I'm expecting to reduce the retrieving time ...
2
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1answer
48 views

Retrieving HKLM nodes of Windows10 Registry

I have used below code, code is working fine, also retrieved the data, but there are performance issues. Retrieving the HKLM registry nodes is taking around 6 mins time. Please suggest any solution. <...
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1answer
57 views

Cookie value to enum

Users can have a Cookie called lang that contains either the value "default=1" (English) or "default=2" (French). This cookie is used to determine their preferred ...
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0answers
155 views

Is this an acceptable MVVM Model with IEditableObject implementation?

I'm trying to follow MVVM pattern in a VB.net WPF application, and I would like to implement IEditableObject. Is this code acceptable for an MVVM application? In ...
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1answer
32 views

Inizialize an Jarray wih n JObject that contain an progressive index

I need to inizialize an JArray with a JObject that contain a property areaNum that is an incremental integer. Right now I wrote the below code, which works ok if I have a small number of JObjects, ...
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35 views

Inherited class calls initialization code in base class [closed]

I am interested in hearing your opinion on the approach I have taken to have inherited classes initialize their base class. Here's a Machines collection class from that maintains a list of Machine ...
2
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1answer
53 views

Validate (Possible) File/Directory Path

I am working on a "comprehensive" library for use in my internal applications and I have created a working method (as far as all of my testing has shown thus far) to ensure that a file/directory path ...
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1answer
28 views

Cascading interfaces for wrapping VSTO Microsoft.Office.Interop

I have created my own wrapping framework for the COM interfaces exposed via Microsoft.Office.Interop. MIRRORING WRAPPERS The first purpose is to be able to unit ...
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1answer
28 views

Assigned a System resource to an image based on variable

I have a mapping application and the marker I'm using is based on the field rep assigned to that visit. My code is just a Select Case based on the rep's name and then it sets the bitmap for that ...
4
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1answer
37 views

Use a delegate to assess equality

I have built my own generic class to implement IEqualityComparer(Of T), which takes a delegate as an input for the constructor. This delegate takes two objects of ...
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0answers
26 views

Console app to get XML from API and save to database

I am making a small console app to get XML from an API and then save the data to a database. While this project was not created via test-driven-development, I have tried to make it such that tests can ...
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2answers
1k views

ROT13 encoder/decoder

This is a simple utility, intended to sit on the desktop for when needed, that does the simple ROT13 encoding and decoding. I am used to coding in VBA, and I am interested in more .Net idiomatic ...
7
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3answers
378 views

Convert integer to full text string duration

I have a function I have written in VB for use in SSRS 2012. It takes an integer and converts it to full text duration - for example 900 becomes "15 minutes", 9000 becomes "2 hours 30 minutes", and ...
2
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1answer
80 views

Encrypts using AES GCM for data with limited visibility and long rest

This is the third iteration of my venture on creating an encryption/decryption solution. I asked a question here, which led to this question here, which led to this answer here, which led me to ...
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1answer
167 views

Encrypts using AES with random initialization vector meant for data with limited visibility and then long rest

I've done some research, reviewed countless SO questions that appeared similar, leading me to endless rabbit holes. My solution is working, but I don't like it. I want to create a random IV for AES ...
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1answer
138 views

Optimization - open excel file from VB.NET using interop

I have a simple app, which is something like a launcher for my macro enabled excel workbook. I made it for easier distribution, to be able to check if excel installed and also to make it look and ...
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1answer
236 views

Interactive auction board

An exam requires me to create a program for an interactive board for an auction: An auction company has an interactive auction board at their sale rooms, which allows buyers to place bids at any ...
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1answer
14 views

Efficiently centralise and manage Groups of Features (aka “lines of services”)

I mostly develop AddIns for Office. In the example of MS Word, I have an AddIn which allows to review drafting style, another AddIn which allows to monitor cross-references, another Addin which allows ...
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0answers
334 views

Verify OpenSSL RSA signature (PHP) with .NET (VB)

I would like to achieve something I believe is pretty standard: A) My VB.NET client (ideally targetting Framework 4.0) sends a text string to my Apache/PHP Server via an HTTPS POST request. B) My ...
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1answer
106 views

Iterating over combinations

Background The following describes the real world problem that my code is intended to solve. It is may help you understand what the code is doing and why. I don't think this is strictly necessary in ...
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0answers
50 views

vb.net Create textfile from template

What is the best approach for creating textfiles from/with a template ? Currently I just read the template from a textfile and Replace all values needed, but I don't think that this is the most solid ...
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1answer
50 views

Function to return the closest Date to Today (inclusive) from Ordered list

The way I've written this feels clunky. Particularly, it feels like I shouldn't need to have both a 'dateToCheck' and 'selectedDate' variables. The objective is to find the Date in a list that is the ...
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2answers
284 views

Detect file type using file signatures

My program has to detect the real file type of a given file using signatures. For now I'm just checking JPG, but I want to add more. ...
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2answers
89 views

Outlook VSTO: Fastening email loop on a large pst file

In a Outlook VSTO Addin I needed to loop through a large pst file (e.g 30GB containing 50k+ mails). Following code block loop the pst file folder by folder recursively. It takes huge time (1hour+) to ...
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0answers
72 views

One class for MySQL and MSSQL Queries

EDIT BELOW I am trying to create resusable classes for MSSQL and MySQL queries (later also Update and Delete queries). I tried it doing the OOP-way. Here is my result: Einstellungen.vb: ...
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0answers
141 views

Comparing two instances of a class

I have a Calculation class. It is persisted in the DB and users can modify it. The aim of the CompareWith function is to ...
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1answer
39 views

Tone Mapping image manipulation

This code is extremely slow and ideally I would appreciate someone walking me through getting this going on the GPU, but if nobody has time for that which is understandable, any and all optimisations ...
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1answer
1k views

Digital persona fingerprint verification takes a lot of time

I'm using Digital Persona U.are.U 4000b fingerprint reader and I have this function that verifies the fingerprint from SQL server My problem is the loop because it takes a lot of time to compare the ...
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1answer
39 views

Split a big file into two and then merge back into the original

After searching and reading some threads (1, 2, 3, 4 and 5) on how to split a big file into smaller ones and then merge them back into the original one I made the following VB.NET code on an empty ...
3
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1answer
89 views

Replace a^b by Pow(a,b)

The application uses NCalc to execute diverse calculations. The 'natural' way to write powers using a computer is using the ^ symbol. However, NCalc already uses ...
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2answers
389 views

Substring a String from given start index and given substring length

I want to substring a String from given start index and given substring length. if the string is empty then returns String.Empty if the string length is greater than start index then it substrings ...
3
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0answers
53 views

TextFileConvert - dos2ux and ux2dos in VB.NET

This provides text file conversion capabilities like the common Unix utilities "ux2dos" and "dos2ux". I needed the capability to perform Unix text file conversions, round trip, within a VB.NET ...
2
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1answer
75 views

Determine if 1 Queen can take King

This challenge was pretty simple - be given the coordinates of a king and a queen on a chess board and determine if the king is in check. Input is the number of test cases with each test case on a ...
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0answers
96 views

Recursive/traversal search of items using EWS managed API in subfolders too

I would like to know if there's a more efficient way of querying items than this (that works, though): ...
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1answer
59 views

Using Try & Catch to solve exception [closed]

I am working on a ADDIN that works on 3D drafting program. This ADDIN has historically grown and now I am doing a big rewrite. During this rewrite I came across a issue. I have 2 (fairly similar) ...
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0answers
146 views

Custom task timer

This code (Windows Forms) shows a series of timers so that the user can manually time a series of tasks. I decided to put this together today because next weekend I want to go through an activity (...
4
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2answers
3k views

AES File Encryption / Decription VB.NET

I've been looking for a while for the right code to encrypt/decrypt files with AES in vb.net. I created the code below. Is this the right way doing AES encryption/decryption nowadays? ...
2
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1answer
58 views

Dynamic programming to solve two printers with different speeds

I solved this problem using a Class, but thought I might try to figure out this memoization thing. Problem There are two printers that print pages at different speeds (X, Y). What is the minimum ...
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2answers
73 views

Inputting 10 numbers in an array

I would like some tips on how I could simplify my code. Basically what I am trying to do is to input 10 numbers in an array but this looks messy so I am trying to change it to look less messy. ...
6
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1answer
87 views

Drawing circles from array to a Form

I've actually been struggling with painting with VB.Net for a few weeks. All I know is that I shouldn't use CreateGraphics if I can avoid it, so I've done just that....
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0answers
41 views

Interface approach of logging channel and exclude of specific log channels

I have library which sending/logging information by diffrent log channels like by email, sms or save to file. It works fine but i would like to get your opinion and get code review regarding my ...

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