Generate and display Logo image in center of QRCode in ASP.Net using C# and VB.Net

Hi RichardSa.

Please refer below sample code.

HTML

<asp:Image ID="Image1" runat="server" ImageUrl="data:image/png;base64,iVBORw0KGgoA..." Visible="false" />
<asp:Image ID="imgQrCode" runat="server" Height="200" Width="200" />

Namespace

C#

using QRCoder;
using System.IO;
using System.Drawing;

VB.Net

Imports QRCoder
Imports System.IO
Imports System.Drawing

Code

C#

protected void Page_Load(object sender, EventArgs e)
{
    imgQrCode.ImageUrl = "data:image/png;base64," + Convert.ToBase64String(GetQRCode());
}

public byte[] GetQRCode()
{
    byte[] image = Convert.FromBase64String(Image1.ImageUrl.Replace("data:image/png;base64,", String.Empty));
    QRCodeGenerator qrGenerator = new QRCodeGenerator();
    QRCodeData qrCodeData = qrGenerator.CreateQrCode("https://www.aspsnippets.com", QRCodeGenerator.ECCLevel.Q);
    QRCode qrCode = new QRCode(qrCodeData);
    using (Bitmap logo = (Bitmap)Bitmap.FromStream(new MemoryStream(image)))
    {
        using (MemoryStream ms = new MemoryStream())
        {
            // Specify the Size in percentage. Here it is specified as 30.
            using (Bitmap qrCodeImage = qrCode.GetGraphic(40, Color.Black, Color.Transparent, logo, 30, 0, true, Color.Transparent))
            {
                qrCodeImage.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
            }
            return ms.ToArray();
        }
    }
}

VB.Net

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
    imgQrCode.ImageUrl = "data:image/png;base64," & Convert.ToBase64String(GetQRCode())
End Sub

Public Function GetQRCode() As Byte()
    Dim image As Byte() = Convert.FromBase64String(Image1.ImageUrl.Replace("data:image/png;base64,", String.Empty))
    Dim qrGenerator As QRCodeGenerator = New QRCodeGenerator()
    Dim qrCodeData As QRCodeData = qrGenerator.CreateQrCode("https://www.aspsnippets.com", QRCodeGenerator.ECCLevel.Q)
    Dim qrCode As QRCode = New QRCode(qrCodeData)

    Using logo As Bitmap = CType(Bitmap.FromStream(New MemoryStream(image)), Bitmap)
        Using ms As MemoryStream = New MemoryStream()
            ' Specify the Size in percentage. Here it is specified as 30.
            Using qrCodeImage As Bitmap = qrCode.GetGraphic(40, Color.Black, Color.Transparent, logo, 30, 0, True, Color.Transparent)
                qrCodeImage.Save(ms, System.Drawing.Imaging.ImageFormat.Png)
            End Using
            Return ms.ToArray()
        End Using
    End Using
End Function

Screenshot