How to Set QR Code Color Using C#

• Highly-credited C#.NET QR Code barcode image generator component
• Easy to change & reset generated QR Code colors in C#.NET applications
• Customize colors of QR Code in ASP.NET & WinForms projects using C# code
• Able to generate & print QR Code image with different background colors
• Free to set module color of created QR Code images using C#.NET class library
• Generated colorful QR Code images are compatible with industry standards

C#.NET QR Code Barcode Generator Overview

Generate & Change QR Code Color in C# Class

Installation

Implementation

     // Generate & print QR Code image using C#
     BarcodeLib.Barcode.QRCode qrbarcode = new BarcodeLib.Barcode.QRCode();
     qrbarcode.Encoding = BarcodeLib.Barcode.QRCodeEncoding.Auto;
     qrbarcode.Data = "ABCD1234abcd";
     qrbarcode.ModuleSize = 3;
     qrbarcode.LeftMargin = 12;
     qrbarcode.RightMargin = 12;
     qrbarcode.TopMargin = 12;
     qrbarcode.BottomMargin = 12;

     // Change module color & background color of QR Code
     qrbarcode.BackgroundColor = System.Drawing.Color.White;
     qrbarcode.ModuleColor = System.Drawing.Color.Blue;

     // Save generated QR Code image to pgn image format file
     qrbarcode.drawBarcode("c:/qrcode.png");

Generate & Print Colorful QR Code in ASP.NET Web Page & IIS

Change QR Code Barcode Colors in ASP.NET Web Page

• Add "Barcodelib.Barcode.ASP.NET.dll" to your ASP.NET project by reference.
• Add "Barcodelib.Barcode.ASP.NET.dll" to the VS toolbox by choosing item.
• Copy files "qrcode.aspx", "qrcode.aspx.cs" from folder barcode in the downloaded package to your ASP.NET project folder.
• Drag QRCodeASPNET to your ASP.NET web site, and change QR code colors through "Properties" window.

Change QR Code Barcode Colors in IIS

• Find folder "barcode" from downloaded trial package and copy it to your IIS folder, eg. C:\inetpub.
• Create a new virtual directory in your IIS, name it "barcode", and connect it to the above "barcode" folder in inetpub. Then, restart IIS.
• Open your web browser and navigate to:
  "http://YourDomain:port/barcode/qrcode.aspx?Data=ABCD1234abcd&ModuleSize=3 &LeftMargin=12&RightMargin=12&TopMargin=12&BottomMargin=12&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=ABCD1234abcd&ModuleSize=3 &LeftMargin=12&RightMargin=12&TopMargin=12&BottomMargin=12&BackgroundColor=FFFFFF&ModuleColor=000079>
  This method will not generate any barcode images in your IIS server side.

Change & Customize QR Code Color in C#.NET WinForms

• Add BarcodeLib.Barcode.WinForms.dll to your C#.NET Windows Forms project reference.
• Add BarcodeLib.Barcode.WinForms.dll to Visual Studio Toolbox.
• Drag the QRCodeWinForm to your windows form.
• Adjust module color & background color using "Properties" window.

All Supported Linear & 2D Barcode Types