Store Qrcoder image in data base

Question

Greeting all

I viewed many examples about generat Qrcoder and no problem with with me; a code below working correctly:

 

private void GenerteSign()
    {
        string FName = txtFisrtName.Text;
        string LName = txtLastName.Text;
        string Codearray = FName + "\n" + LName;
        QRCodeGenerator qrGenerator = new QRCodeGenerator();
        QRCodeGenerator.QRCode qrCode = qrGenerator.CreateQrCode(Codearray, QRCodeGenerator.ECCLevel.Q);
        System.Web.UI.WebControls.Image imgBarCode = new System.Web.UI.WebControls.Image();
        imgBarCode.Height = 150;
        imgBarCode.Width = 150;

        using (Bitmap bitMap = qrCode.GetGraphic(20))
        {
            using (MemoryStream ms = new MemoryStream())
                {
                    bitMap.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
                    byte[] byteImage = ms.ToArray();
                    imgBarCode.ImageUrl = "data:image/png;base64," + Convert.ToBase64String(byteImage);
                }//End Using Memorystream
//==Implement Qrcoder parameter to PlaceHolder Control
            PlH_Qr.Controls.Add(imgBarCode);
//==End Implement Qrcoder
        } //End Using Bitmap
    }

 So a last code we using Placholder control to catch Qrcoder value, some example use Image control (that's depends what you like).

 

My question:

How to store Plachoder value in data base, as I see placehoder just has  method (.Controls.Add).

is that possible or not.

 

 Table T-SQL Code:

 

CREATE TABLE [dbo].[Forum_RUsers] (
    [Id]              INT              IDENTITY (1, 1) NOT NULL,
    [Frm_Name]        NVARCHAR (50)    NULL,
    [Frm_LName]       NVARCHAR (50)    NULL,
    [Frm_QRSign]      VARBINARY (MAX)  NULL,
    PRIMARY KEY CLUSTERED ([Id] ASC)
);

Secondly:

I see that example use Qrcoder implemented in (Save Button),see  refernce:

https://www.aspforums.net/Threads/208874/Generate-QR-code-Image-and-save-in-Database-using-C-and-VBnet-in-ASPNet/

Actually, that's possible to follow last example, but I need to show Qrcoder firstly and in next step let user click on save form.

 

Some suggestion in many examples said "why to use store Qrcoder in D.B , store it in image folder, that's right; But for for security level keep it in D.B".

Save Button code:

protected void SendFrm(object sender, EventArgs e)
  {
      try
      {
              string CONSTRFrM = @"Data Source=(local)\SQLEXPRESS;AttachDbFilename=|DataDirectory|\aspnet-FrmREg.mdf;Integrated Security=True";

              using (SqlConnection con = new SqlConnection(CONSTRFrM))
              {
                  SqlCommand cmd = new SqlCommand("INSERT INTO Forum_RUsers(Frm_Name,Frm_LName,Frm_QRSign) VALUES       (@Frm_Name,@Frm_LName,@Frm_QRSign)", con);
                  cmd.CommandType = CommandType.StoredProcedure;
                  con.Open();
                  cmd.Parameters.AddWithValue("@Frm_Name", txtFisrtName.Text.Trim());
                  cmd.Parameters.AddWithValue("@Frm_LName", txtLastName.Text.Trim());
                  cmd.Parameters.AddWithValue("@Frm_QRSign","Not Implemented Yet");
                  cmd.ExecuteNonQuery();
                  lblMessage.Text = "Your Form submitted successfully";
                  lblMessage.ForeColor = System.Drawing.Color.Green;
              }
          }
      }
      catch (Exception)
      {
          lblMessage.Text = "Your record not submitted";
          lblMessage.ForeColor = System.Drawing.Color.Red;
      }
  }

 What the solution to reuse GenerteSign() method to imlement in save code;

 thanks