Cómo crear un código QR en VB.NET

IronQR

IronQR is a comprehensive and developer-friendly library tailored for .NET applications, specializing in the efficient generation and manipulation of QR codes. It's a go-to tool for developers looking to integrate QR code functionality into their C# or VB.NET projects. Creating QR code VB.NET projects is far easier with IronQR.

Key features of IronQR include:

1. Broad QR Code Support: IronQR excels in handling a wide range of QR code types. Whether you're dealing with standard QR codes, Micro QR codes, a QR code barcode image, or even specific formats like Aztec or Data Matrix, IronQR has you covered. This diversity makes it ideal for applications requiring a variety of QR code types.
2. Customization Capabilities: Tailoring QR codes to fit specific requirements is straightforward with IronQR. You can adjust critical parameters such as size, error correction level, and encoding type. This flexibility ensures that the QR codes you generate align perfectly with your project's needs.
3. User-Friendly API: IronQR's API is designed for simplicity and accessibility. Even developers with limited experience can quickly get up to speed and start generating QR codes with minimal lines of code, streamlining the development process.
4. Data Encoding Versatility: With IronQR, you're not limited to basic text or URLs. It supports a broad spectrum of data types, including contact details, geographic information, and more. This feature broadens the scope of potential applications, from digital business cards to geolocation-based services.
5. Image Generation and Handling: IronQR provides robust functionalities for rendering QR codes as images. This is particularly useful for applications that need to display QR codes directly or save them as image files for later use.
6. Extensive Documentation and Examples: To help developers hit the ground running, IronQR offers detailed documentation, a plethora of examples, and comprehensive tutorials. These resources are invaluable for both learning the library and troubleshooting during development.
7. Ongoing Maintenance and Support: IronQR is regularly updated to stay in sync with the latest .NET frameworks and development best practices. Moreover, IronSoftware's dedicated support team is available to assist with any challenges developers may encounter.

Creating a VB.NET Project in Visual Studio

Let's start by creating a new VB.NET project in Visual Studio:

1. Launch Visual Studio: Open Visual Studio on your computer.
2. Create a New Project: Click on "Create a new project."
3. Select Language and Project Type: Choose "Visual Basic" under the "All Languages" tab. Then, select "Console App" for a console application. Click "Next."

4. Configure Your Project: Enter your project name and other details as required, then click "Create."

QR Code Generation in VB.NET Code

With IronQR installed, you can create QR codes in your VB.NET application. Here are a few quick lines of code:

Imports System
Imports IronQr
Imports IronSoftware.Drawing

Module Program
    Sub Main(args As String())
        ' Create a QR Code object containing the desired text
        Dim myQr As QrCode = QrWriter.Write("hello world")

        ' Save QR Code as a Bitmap object in memory
        Dim qrImage As AnyBitmap = myQr.Save()

        ' Save QR Code Bitmap to a file on disk
        Try
            qrImage.SaveAs("c:/qr.png")
        Catch ex As Exception
            Console.WriteLine("Error saving the QR code: " & ex.Message)
        End Try
    End Sub
End Module

Imports System
Imports IronQr
Imports IronSoftware.Drawing

Module Program
    Sub Main(args As String())
        ' Create a QR Code object containing the desired text
        Dim myQr As QrCode = QrWriter.Write("hello world")

        ' Save QR Code as a Bitmap object in memory
        Dim qrImage As AnyBitmap = myQr.Save()

        ' Save QR Code Bitmap to a file on disk
        Try
            qrImage.SaveAs("c:/qr.png")
        Catch ex As Exception
            Console.WriteLine("Error saving the QR code: " & ex.Message)
        End Try
    End Sub
End Module

Generate QR Code with Logo

Here's the complete source code to create QR code images with a logo:

Imports System
Imports IronQr
Imports IronSoftware.Drawing

Module Program
    Sub Main(args As String())
        ' Assign a valid license key if necessary
        IronQr.License.LicenseKey = "Add-License-Key"

        ' Set QR options with high error correction and a margin
        Dim options As New QrOptions(QrErrorCorrectionLevel.High, 20)

        ' Create a QR Code object containing the desired text with options
        Dim myQr As QrCode = QrWriter.Write("greetings terra", options)

        ' Load a logo from file
        Dim logoBmp As New AnyBitmap("logo.png")

        ' Define style options including the logo
        Dim style As New QrStyleOptions With {
            .Dimensions = 300,
            .Margins = 10,
            .Color = Color.Gray,
            .Logo = New QrLogo With {
                .Bitmap = logoBmp,
                .Width = 100,
                .Height = 100,
                .CornerRadius = 2
            }
        }

        ' Save QR Code as a styled Bitmap object in memory
        Dim qrImage As AnyBitmap = myQr.Save(style)

        ' Save QR Code Bitmap to file on disk
        qrImage.SaveAs("qr_styled.png")
    End Sub
End Module

Imports System
Imports IronQr
Imports IronSoftware.Drawing

Module Program
    Sub Main(args As String())
        ' Assign a valid license key if necessary
        IronQr.License.LicenseKey = "Add-License-Key"

        ' Set QR options with high error correction and a margin
        Dim options As New QrOptions(QrErrorCorrectionLevel.High, 20)

        ' Create a QR Code object containing the desired text with options
        Dim myQr As QrCode = QrWriter.Write("greetings terra", options)

        ' Load a logo from file
        Dim logoBmp As New AnyBitmap("logo.png")

        ' Define style options including the logo
        Dim style As New QrStyleOptions With {
            .Dimensions = 300,
            .Margins = 10,
            .Color = Color.Gray,
            .Logo = New QrLogo With {
                .Bitmap = logoBmp,
                .Width = 100,
                .Height = 100,
                .CornerRadius = 2
            }
        }

        ' Save QR Code as a styled Bitmap object in memory
        Dim qrImage As AnyBitmap = myQr.Save(style)

        ' Save QR Code Bitmap to file on disk
        qrImage.SaveAs("qr_styled.png")
    End Sub
End Module

Here's the output:

For more detailed information on exporting the generated QR codes and barcodes in VB.NET, visit this tutorial link here.