I want click on Qr code and to tale print of it.
Asp.net
CS page
using QRCoder;
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class Reports_QRCode : System.Web.UI.Page
{
SqlConnection con;
String strConn = ConfigurationManager.ConnectionStrings["ConOrms"].ConnectionString;
protected void Page_Load(object sender, EventArgs e)
{
if(!IsPostBack)
{
ShowData();
}
}
protected void ShowData()
{
DataTable dt = new DataTable();
con = new SqlConnection(strConn);
SqlDataAdapter adapt = new SqlDataAdapter("select distinct P.Port,Lots,WMT from [IQMS].[dbo].[tblDischargeLots] t LEFT JOIN [IQMS].[dbo].tblPort P on t.PortId=P.PortId where WMT >20000", con);
con.Open();
adapt.Fill(dt);
con.Close();
grdQrCodeResult.DataSource = dt;
grdQrCodeResult.DataBind();
}
protected void grdQrCodeResult_RowDataBound(object sender, GridViewRowEventArgs e)
{
//Checking the RowType of the Row
if (e.Row.RowType == DataControlRowType.DataRow)
{
//Find the PlaceHolder control.
PlaceHolder plBarcode = (e.Row.FindControl("plBarCode") as PlaceHolder);
PlaceHolder plBarcodes = (e.Row.FindControl("plBarCodes") as PlaceHolder);
int index = e.Row.RowIndex;
string code = "Scanner" + Convert.ToInt32(index);
QRCodeGenerator qrGenerator = new QRCodeGenerator();
QRCodeData qrCodeData = qrGenerator.CreateQrCode(code, QRCodeGenerator.ECCLevel.Q);
QRCode qrCode = new QRCode(qrCodeData);
//QRCodeGenerator qrGenerator = new QRCodeGenerator();
//QRCodeGenerator.QRCode qrCode = qrGenerator.CreateQrCode(code, QRCodeGenerator.ECCLevel.Q);
System.Web.UI.WebControls.Image imgBarCode = new System.Web.UI.WebControls.Image();
imgBarCode.Height = 60;
imgBarCode.Width = 60;
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);
}
plBarcode.Controls.Add(imgBarCode);
}
System.Web.UI.WebControls.Image imgBarCodes = new System.Web.UI.WebControls.Image();
imgBarCodes.Height = 60;
imgBarCodes.Width = 60;
using (Bitmap bitMap = qrCode.GetGraphic(20))
{
using (MemoryStream ms = new MemoryStream())
{
bitMap.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
byte[] byteImage = ms.ToArray();
imgBarCodes.ImageUrl = "data:image/png;base64," + Convert.ToBase64String(byteImage);
}
plBarcodes.Controls.Add(imgBarCodes);
}
}
}
protected void grdQrCodeResult_SelectedIndexChanged(object sender, EventArgs e)
{
}
}
My Screen

Amit MohantyPosted Dec 26, 2022, 1:03 PM
To resolve the above error you must set the property EnableEventValidation = "false" in the @Page Directive like below
Sandeep KumarPosted Dec 26, 2022, 10:41 AM
This is my error
Amit MohantyPosted Dec 26, 2022, 9:42 AM
What type of error?
Sandeep KumarPosted Dec 26, 2022, 9:36 AM
Error showing
Amit MohantyPosted Dec 26, 2022, 8:03 AM
Try this