How to Use If Statement in VB.NET With Example
This article how to use If statement in VB.Net with example will teach you how to properly use the if statement using vb.net with practical examples that can be used in real situations.
Sample Syntax
If condition Then [ statements ] [ Else [ else statements ] ]
The “If statement in vb.net” is a conditional logic branching in computer programming.
It contains true and false statements in computer terminology.
The true statement evaluates a nonzero value while the false statement evaluates a zero value.
Explanation with Flowchart
Just like in the sample diagram below, it evaluates the condition if the condition is “TRUE” then it performs the action that corresponds to the statement but, if the condition is “FALSE” the program will perform the alternative action.
This conditional logic is not just for computer programming but this can be also used in your daily life without realizing you’re doing it.
For instance, if you know how to catch fish then you have something to eat for the day but if not, you will be hungry the whole day.
Here’s the example of if and else statement:
Dim name as String
name = "xyre"
If name= "xyre" Then
MessageBox.Show("Name is xyre")
else
MessageBox.Show("Name is not xyre")
End IfAnother Example
Dim username As String
Dim userpass As String
username = "admin"
userpass = "admin"
If username = "admin" And userpass = "admin" Then
MsgBox("Welcome itsourcecode")
Else
MsgBox("Access is denied!")
End IfCode Explanation
Time needed: 10 minutes
How to use If Statement in VB.Net code explanation
- Declare a Variable
In the first two lines, we declare a variable “username” and “userpass” as a string data type.
- Assign Value to a Variable
Next, we assign value to those variable (username and userpass)
- Start Condition
Then, we start the condition and check if the username and userpass are equal to the assigned value.
- Perform the Action
Next, we evaluate the result of condition if it is TRUE then it will display a popup that says “Welcome itsourcecode”.
- Set Alternative Action
In this line, we set an alternative action if the result of condition is false.
- End Condition
Finally, we and the statement.
This if statement in vb.net tutorial is an upgrade version of my tutorial “if statement” in another site way back 2013.
I have here a bonus tutorial of using if statement in vb.net but in this case, it will be using nested if statement.
Dim username As String
Dim userpass As String
username = "admin"
userpass = "admin"
If username = "admin" And userpass = "ad" Then
If username = "admin" And userpass = "adm" Then
If username = "admin" And userpass = "admin" Then
MsgBox("Welcome itsourcecode")
Else
MsgBox("Access is denied!")
End If
Else
MsgBox("Access is denied!")
End If
Else
MsgBox("Access is denied!")
End IfFrequently Asked Questions
How does this VB.NET project work?
Built with VB.NET WinForms (.NET Framework 4.5+) and SQL Server backend. Standard structure: Form designer to code-behind event handlers to ADO.NET data access layer to SQL Server. Login form for auth. Ready to extend for BSIT capstone scope.
What Visual Studio and SQL Server versions does this VB.NET project require?
Most projects use VB.NET WinForms on .NET Framework 4.5+ with SQL Server 2012 Express or higher. To run: install Visual Studio 2019 / 2022 (Community is free) with the ‘Desktop development with .NET’ workload, install SQL Server Express + SSMS, open the .sln file, build, run.
How do I set up the database for this VB.NET project?
Open SQL Server Management Studio (SSMS) and connect to your SQL Server (e.g. localhost\SQLEXPRESS). Right-click Databases, choose Restore Database OR New Database then import the included .sql script. Update the connection string in App.config (or in code-behind Module) with your server name + credentials. Rebuild and run.
Can I use this VB.NET project for a BSIT capstone or thesis?
Yes, VB.NET is one of the most accepted languages by Philippine BSIT panels. Extend it: add role-based access (admin/staff/customer login redirect), Crystal Reports or RDLC reports, dashboards with Chart control, audit log, multi-branch support. Pair with Chapter 1-5 documentation matching your panel’s rubric.
Why am I getting ‘connection error’ or ‘cannot find SQL Server’?
Three common VB.NET issues: (1) Connection error: SQL Server isn’t running. Open SQL Server Configuration Manager and verify SQL Server (SQLEXPRESS) service is started. (2) Wrong server name in connection string. Try .\SQLEXPRESS, (local)\SQLEXPRESS, or your machine name. (3) Login failed: SQL Server is set to ‘Windows-only’ authentication. Switch to Mixed Mode in SSMS Server Properties, Security.
Where can I find more VB.NET projects with source code?
Browse the VB.NET Projects hub for the full library. For C# WinForms alternatives see C# Projects. For ASP.NET web alternatives see ASP.NET Projects. For BSIT capstone idea lists see 150 Best Capstone Project Ideas.
Inquiries
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