How to Change Image Color of QR Code Using VB.NET

• Professional VB.NET barcoding control used for QR Code barcode generation
• Written in managed C# and compatible with common .NET development platforms
• Compile advanced VB.NET QR Code generation & color setting features into a DLL
• Support QR Code color customization in WinForms projects & ASP.NET web site
• Support generating colorful QR Code images in .NET Reporting & Console applications
• Adjust QR Code image color using VB.NET class code or through Properties window

VB.NET QR Code Generator Control Overview

How to Change QR Code Color in VB.NET Class

How to Install VB.NET Barcode Libarary DLLs

How to Set QR Code Color in VB.NET

     ' Used to generate & create high-qualtiy QR Code image
     Dim qrcode As New BarcodeLib.Barcode.QRCode()
     qrcode.Encoding = BarcodeLib.Barcode.QRCodeEncoding.Auto
     qrcode.Data = "ABCD1234abcd"
     qrcode.ModuleSize = 3
     qrcode.LeftMargin = 12
     qrcode.RightMargin = 12
     qrcode.TopMargin = 12
     qrcode.BottomMargin = 12

     ' Used to set & adjust QR Code image colors
     qrcode.BackgroundColor = System.Drawing.Color.White
     qrcode.ModuleColor = System.Drawing.Color.Blue

     ' Used to draw & output QR Code to your system
     qrcode.drawBarcode("c:/vbqrcode.png")

How to Set QR Code Barcode Color in ASP.NET Web & IIS

Set QR Code Color in ASP.NET Web Application

• Integrate "Barcodelib.Barcode.ASP.NET.dll" to your ASP.NET project by adding reference.
• Add "Barcodelib.Barcode.ASP.NET.dll" to the VS Toolbox by choosing item.
• Find folder "barcode" from downloaded package and copy files "qrcode.aspx", "qrcode.aspx.cs" inside it to your ASP.NET project folder.
• Drag & drop "QRCodeASPNET" from the toolbox to your ASP.NET web page.
• Adjust QR code colors through "Properties" window.

Adjust QR Code Barcode Color in IIS Application

• Copy folder "barcode" from downloaded trial package and copy it to your IIS folder, eg. C:\inetpub.
• Set a new virtual directory in your IIS, name it "barcode", and connect it to the above "barcode" folder.
• Restart IIS. Later, open your web browser and navigate to:
  "http://YourDomain:port/barcode/qrcode.aspx?Data=12345678910&ModuleSize=2 &LeftMargin=8&RightMargin=8&TopMargin=8&BottomMargin=8&BackgroundColor=FFFFFF&ModuleColor=000079"
• To insert this QR Code image in your aspx or html page, simply pass the url to IMG tag or src value.
  For example: <img src= http://YourDomain:Port/barcode/qrcode.aspx?Data=12345678910&ModuleSize=2 &LeftMargin=8&RightMargin=8&TopMargin=8&BottomMargin=8&BackgroundColor=FFFFFF&ModuleColor=000079>
  This method will not create any QR Code barcode images in your IIS server side.

How to Change QR Code Color in VB.NET Windows Forms

• Add "BarcodeLib.Barcode.WinForms.dll" to your VB.NET Windows Forms by reference and to your Visual Studio Toolbox by adding items.
• Drag the "QRCodeWinForm" control from the toolbox to your Windows Forms Project.
• You can change background color & module color of generated QR Code by setting corresponding parameters in "Properties" window.

How to Generate 1D & 2D Barcodes in VB.NET