4,457 Topics
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 | ## Introduction ## In Android projects, **DataSource** classes act as entry points to interacting with local or remote data sources. Their dependencies tend to be HTTP clients, the database, or DAOs, and their dependents are usually **Repository** classes. In this tutorial, we will learn how to provide a fake **DataSource** … |
 | # Introduction # As we move into 2022, businesses will continue to look for ways to become more data-driven. This means that knowing how to use Structured Query Language, commonly called SQL or 'Sequel', will remain an essential skill for data scientists, analysts, and developers. In this post, we'll provide … |
| | ## Introduction ## Among the many ways to create your own View, extending an existing View is the simplest option. This is because you are inheriting pre-made attributes, drawing, and accessibility features. In this tutorial, we will learn how to create our own custom View by extending an existing View … |
 | Helllo guys am trying to build my first ASP.NET application here and I have a **Models** folder and **Controllers** folder. The models folder contains the class for an entity called customer whose properties are to be read from sqlite database. Thee is also a **Pages** folder that contains a folder …  |
| | ## Introduction ## If your App only need a simple way to play videos on Android, then **VideoView** (`android.widget.VideoView`) might just fit the bill. In this tutorial, we will learn how to use VideoView for video playback in our App. ## Goals ## At the end of the tutorial, you … |
 | [This item](https://arstechnica.com/information-technology/2022/03/sabotage-code-added-to-popular-npm-package-wiped-files-in-russia-and-belarus/) was in the news a few days ago. I'd like to know people's thoughts. I'm torn. On the one hand, it erodes trust in all open source software. On the other hand, it selectively targets the aggressor nations in an illegal and immoral war. But where do we …  |
| | I see a need to jell many associated and related websites for cities and villages into one site for that community. Plan on making a Go To site for the locals of each city or village. |
| | ## Introduction ## When working on Android with Kotlin, you might have ran into property delegates on a few occasions, such as `activityViewModels()` from `androidx.fragment.app` or `remember()` from `androidx.compose.runtime`. In this tutorial, we will learn what property delegates are and how to create them ourselves. ## Goals ## At the … |
 | Can someone help me with this as I am having problems. My problem is that after i click button 2 for placing the order the data from the checkout form should go to the database but it does not work, there is no sign of that. I don't know if … |
 | Hi DW. I'm trying to display a popup over an input box, but the issue is that some websites that I want to also display on have div class name that contains many classes in it which result it a div class name to have spaces in it which is … |
| | **Requires:** 1. Python version 3.8 or newer 2. wxPython version 4.0 or newer 3. exif module 4. Windows with NTFS file system To ensure you have the required packages please run the following 1. python -m pip install --upgrade pip 2. pip install exif 3. pip install wxPython I have … |
| | # Comparing two videos side by side I have been creating walk-through videos on the cheap by just wandering through an area with my little Sony camera. Lacking a steady-cam I just try to hold the camera as steady as possible. Fortunately, with the proper (free) tools I can still … |
| | I have been looking for a good way to embed vlc in a python tkinter frame. I found a script on stackexchange that does the basic work, but - to embed the vlc in a frame - the script relies upon an oop technique I have asked about before but … |
| | Hi, I am using Python Tkinter and I want my pictures to fade in and fade out before or after the next picture. How can I put a fade in and fade out in my source code below. Thank you def start(): global i, show if i >= (len(images) - … |
| | Private Sub delete_Click(sender As System.Object, e As System.EventArgs) Handles delete.Click Try Dim con As New SqlConnection("Data Source=.\SQLEXPRESS;AttachDbFilename=D:\JENNY PROJECT\JENNYFER\SMS project\SMS project\Database1.mdf;Integrated Security=True;User Instance=True") con.Open() Dim query As String query = "delete from course_tabl where c_name='" + ComboBox1.Text + "'" cmd = New SqlCommand(query, con) dr = cmd.ExecuteReader MessageBox.Show("Do you really want … |
 | Hi group, It's been some time since I last posted. It's good to be involved in programming again. It's been much too long. It's been a while since I've written code that would write to a SQL database. It seems like the connection string is correct. However I'm getting a …  |
| | I am very new to VB.NET. That said, I have developed a windows form that utilizes an SQL Server back end. I am developing using Visual Studio 2008 and the 3.5 Framework. The SQL server is 2005. I do not have any warnings or errors, and the project compiles without … |
 | [ATTACH=RIGHT]20145[/ATTACH][B]Building your first DYNAMIC Database application. This is Part One of a four part tutorial on how to install and use your database, Part Two will teach you how to build successful connections and Part Three will teach you how to build database interaction and management of your databases.[/B] There … |
| | Dear sir, i got a TFT device attendance 3.5 inch and iam using SDK 6.2.4.11 iam using windows 10 LTSC Enterprize 64 bit when running , i created a windows service on it when i try to run it, it does not work and cause an error 1053 :Error 1053: … |
| | Python-wxPython Tutorial This tutorial will take you through the basics of wxPython. ##Introduction: Let's face it. I am a dinosaur. I got my computer science degree in the mid 70s. And it won't be long before **I** am in **my** mid 70s. So why am I trying to learn Python? … |
| | I'm in the process of developing a free open source online platform/course for complete beginners to teach themselves coding in Python. See https://github.com/alexmojaki/futurecoder for more information or try out the demo at https://futurecoder.herokuapp.com/. It's completely interactive and has several awesome features, including three dedicated debuggers, gradual hinting and solution revelation, … |
 | I work on c# desktop app I Can't export data to excel file with multiple tab(multi sheet). only that i can do create excel file with only sheet based on data exist on data table module field. I use open XML library Data table data as below : Divide Output … |
| | Hi, I have one form with multiple reading data (using BindingSource) and I want to store those data + some text entry to third table (also using BindingSource DataGrid) Is it possoble to do that using sql statement ? I have connection to database. Picture is to show what I … |
| | PLease help me. I'm doing a login form with ms access but this line of code having problem "Dim dr As OleDbDataReader = cmd.ExecuteReader" Below is the source code Imports System.Data.OleDb Public Class Form1 Dim con As New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\Users\leong\documents\visual studio 2010\Projects\WindowsApplication4\WindowsApplication4\coursework.mdb") Dim cmd As OleDbCommand Private Sub Button1_Click(ByVal sender … |
 | Is there a mechanism to embed code editors(Python, Java, Javascript) within a cloud based application. What are some of the best open source option ? |
| | can someone help me take a look i face (oledbexception was unhandled (too many fields defined)) below is my code . Private Sub btnBrowse_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnBrowse.Click Properties='Excel 12.0;HDR=NO;'" Dim Chosen_File As String = "" If openFileDialog1.ShowDialog() = DialogResult.OK Then Chosen_File = openFileDialog1.FileName End … |
| | Imports System.Data.OleDb Public Class Form1 Dim pro As String Dim connstring As String Dim myconnection As OleDbConnection = New OleDbConnection Dim command As String Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click pro = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Users\sinthu\Documents\Database1.accdb" connstring = pro myconnection.ConnectionString = connstring myconnection.Open() If myconnection.State = … |
| | i have a database at *mysql * and i already save image and use search button to retrieve image from mysql database to picture box, *vb.net *, i dont have a code how listview retrieve all image from mysql but the code is different funtion but the concet is the … |
| | hello, im going to create POS project, can you help me how to retrieve all image from mysql db to listview, so that i can view all image that i save to my db, i already save image and use sreach button on retrieve image from db to picturebox. thank … |
| | Hi, I hv vb.net applivcation. I have following CODE1 to save data & to prevent duplicate data entry into table. The following code I put in button save event. However I want to put this CODE2 in perticluar textbox e.g. here SpecimenNoTextBox. so that when the user enter duplicate SpecimenNo.it … |
| | Hi All, Can you suggest the best cloud open source linux-based software that can be customized and scaled for university/school 1. registration and administration; 2. scheduling/timetabling, e.g., for managing teaching and examination timetables? |
| | Sophos software has recent.y made their [Sandboxie](https://www.sandboxie.com/) software free for personal use and will soon be making it open source. For anyone unfamiliar with Sandboxie, it implements an isolated enviroment where you can run programs (even install them) without fear of affecting your system. When you run a program from … |
| | Hello, I am learning Tkinter. As a part of the learning process I am building a Notepad clone in order to become familiar with Tkinter widgets. I am pretty close to completing it - I added about 90% functionality to the application - but I face two problems: 1) The … |
| | Hey everyone. I received this sql server error and I can't figure out where the trouble is: Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: …  |
| | I am building my blog website and I want to make a page that will search info I have created in an excel spreadsheet and I want to include images for each item. Almost like an e-commerce or retail type of search but only for information but not just a … |
| | I'm new to c# and I'm trying to write a movie database that retrieves data from IMDB. For the codecs I found MediaInfo. The included example in winforms works fine, but when I try to use the library in my console application I get the error "Unable to load MediaInfo … |
| | I am thinking of moving to ecommerce development. There is just so much out there so much so that I find myself at a loss as to where to start. I do front end development but I understand backend equally well. Ideally I would like to find a suitable e-commerce … |
| | I was looking for open source projects on google and found this platform crowdsourcer.io is there anyone with experience using the platform? I plan to contribute to a game project there. |
| | Hi guys, Am developing a clinical management system in VB.net and using Microsoft Access for the database. Everything else is working very well. But the login code is not working. It's throing an error message "Object reference not set to an instance of an object" on line 12. Below is … |
| | I think we can all agree (this will likely provoke disagreement) that a voting machine that records a vote electronically without a way to do a manual verification is a bad idea. How then should a proper voting machine work. My suggestion is to have a touch screen on which … |
| | In mysql database i created "leave" table: CREATE TABLE `leave` ( `ID_LEAVE` int(11) NOT NULL, `ID_WORKER` int(11) NOT NULL, `BEGIN_DATE` datetime DEFAULT NULL, `END_DATE` datetime DEFAULT NULL ); INSERT INTO `leave` (`ID_LEAVE`, `ID_WORKER`, `BEGIN_DATE`, `END_DATE`) VALUES (1, 26, '2019-03-19 07:00:00', '2019-03-19 15:00:00'), (6, 26, '2019-03-22 07:00:00', '2019-03-25 15:00:00'); "Sickness" table: … |
| | In desktop application used in technologies like C#, .Net and MySQL I import data from large file (which is about 37 MB) to datagridview. The table from Excel file is in below:  After loading data from Excel to datagridview I'm inserting that data to MySQL database. Later when I … |
 | Hi. Im doing a login form with decryption. So i did a modification to my login code for decryption. Before i did the decryption, the login form is functioning well. But after i edit it to insert decryption code it suddenly cannot connect to database. Im still a begginer in …  |
| | Hi Im having an error with my app, Im still learning to code. It gives me error at line rs = cmdOLEDB.ExecuteReader Here's my full code Imports System.Data Imports System.Data.OleDb Imports System.IO Public Class Form11 Dim cnnOLEDB As New OleDbConnection Dim cmdOLEDB As New OleDbCommand Dim cmdInsert As New OleDbCommand …  |
| | Hi All, I have 7 tables in my access database. i wrote a code to select the data table using the combobox and to display the selected table in the datagridview. Now i need to add,edit or update, delete the data into the selected tables. In which the text boxes … |
| | Hi group, I'm trying to store the information from a various textboxes into my database. However it is not writing the data (I'm getting my planned error message, "New Record FAILED. Please contact your systems administrator." From the code below, do you see where my error may be? What corrections … |
| | I'm creating a program that maintains student scores. I've created a class called students that stores the data and displays it in a list box. Once the user clicks btnAdd a new form (frmAddStudent) loads that allows them to add the user by name and their scores and display it … |
| | Windows tablet With very high compatibility with Microsoft Office suite. So if your needs are mostly work, consider Windows tablets. Should I buy an Andriod tablet? Advantages of Andriod: With the iPad you don't have much choice but with Andriod it is different. Since most companies currently run the Android …  |
| | Option Explicit Dim cn As New ADODB.Connection Dim rs As New ADODB.Recordset Dim list As ListItem Sub Connection() cn.Open "provider=microsoft.jet.oledb.4.0;data source=C:\Users\Archana\Documents\login.mdb;" rs.CursorLocation = adUseClient rs.Open "ARegistration", cn, adOpenKeyset, adLockPessimistic End Sub Private Sub cboAid_Click() rs.Open "Select * from ARegistration", cn, adOpenDynamic, adLockOptimistic rs.MoveFirst Do While Not rs.EOF If cboAid.Text = … |
| | Hiya, looking for some help on this bit of code: def save(x,y,z): user=x yourinventory=y score=z allinvent=[] allscore=[] with open("Inventory.txt","r+")as inventory: for line in inventory: allinvent.append(line.strip().split(',')) allinvent.append("\n") for line in allinvent: if (line[0]==yourinventory): allinvent.append(yourinventory) allinvent.pop(line[0:8]) print(allinvent) break inventory.append(allinvent) inventory.close I'm currently working on saving things like inventory, and I'm not sure … |
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