ByteScout Barcode Reader SDK - ASP.NET VB - Batch Read Barcodes To CSV - ByteScout

ByteScout Barcode Reader SDK – ASP.NET VB – Batch Read Barcodes To CSV

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How to batch read barcodes to CSV in ASP.NET VB using ByteScout BarCode Reader SDK

Tutorial on how to batch read barcodes to CSV in ASP.NET VB

Sample source code below will show you how to cope with a difficult task like batch read barcodes to CSV in ASP.NET VB. ByteScout BarCode Reader SDK is the SDK for reading of barcodes from PDF, images and live camera or video. Almost every common type like Code 39, Code 128, GS1, UPC, QR Code, Datamatrix, PDF417 and many others are supported. Supports noisy and defective images and docs. Includes optional documents splitter and merger for pdf and tiff based on found barcodess. Batch mode is supported for superior performance using multiple threads. Decoded values are easily exported to JSON, CSV, XML and to custom format and you can use it to batch read barcodes to CSV with ASP.NET VB.

This code snippet below for ByteScout BarCode Reader SDK works best when you need to quickly batch read barcodes to CSV in your ASP.NET VB application. In order to implement the functionality, you should copy and paste this code for ASP.NET VB below into your code editor with your app, compile and run your application. Use of ByteScout BarCode Reader SDK in ASP.NET VB is also explained in the documentation included along with the product.

Download free trial version of ByteScout BarCode Reader SDK from our website with this and other source code samples for ASP.NET VB.

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Default.aspx
      
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="ImagePDFBarcodeToCSV.Default" %> <!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title>Scan Image/PDF files for barcode and generate CSV</title> </head> <body> <form id="form1" runat="server"> <label> This project demonstrates scanning of folder, and processing each image/PDF file for barcode.<br /> It'll then generates CSV file containing barcodes and downloads it. </label> <br /> <br /> <div> <asp:Button ID="btnImagePDFBarcodeToCSV" Text="Scan for Barcode and Generate CSV" runat="server" OnClick="btnImagePDFBarcodeToCSV_Click" /> <br /> <br /> <asp:Label ID="lblInfo" runat="server" Text=""></asp:Label> </div> </form> </body> </html>

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Default.aspx.cs
      
using Bytescout.BarCodeReader; using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; namespace ImagePDFBarcodeToCSV { public partial class Default : System.Web.UI.Page { /* IF YOU SEE TEMPORARY FOLDER ACCESS ERRORS: Temporary folder access is required for web application when you use ByteScout SDK in it. If you are getting errors related to the access to temporary folder like "Access to the path 'C:\Windows\TEMP\... is denied" then you need to add permission for this temporary folder to make ByteScout SDK working on that machine and IIS configuration because ByteScout SDK requires access to temp folder to cache some of its data for more efficient work. SOLUTION: If your IIS Application Pool has "Load User Profile" option enabled the IIS provides access to user's temp folder. Check user's temporary folder If you are running Web Application under an impersonated account or IIS_IUSRS group, IIS may redirect all requests into separate temp folder like "c:\temp\". In this case - check the User or User Group your web application is running under - then add permissions for this User or User Group to read and write into that temp folder (c:\temp or c:\windows\temp\ folder) - restart your web application and try again */ protected void Page_Load(object sender, EventArgs e) { } protected void btnImagePDFBarcodeToCSV_Click(object sender, EventArgs e) { //Read Barcode Process Reader reader = new Reader(); reader.RegistrationKey = "demo"; reader.RegistrationName = "demo"; // Set Barcode type to find reader.BarcodeTypesToFind.All = true; // Output list List<CSVOutputFormat> lstCSVOutput = new List<CSVOutputFormat>(); // Get all files in folder, and iterate through each file var files = System.IO.Directory.GetFiles(Request.MapPath("~/BarcodeFiles")); foreach (var fileName in files) { // Read barcodes FoundBarcode[] barcodes = reader.ReadFrom(fileName); foreach (FoundBarcode code in barcodes) { lstCSVOutput.Add(new CSVOutputFormat { barcodeValue = code.Value, barcodeType = code.Type.ToString(), scanDateTime = DateTime.Now.ToString(), fileName = fileName }); } } // Set info text lblInfo.Text = string.Format("Total {0} barcode found in {1} file.", lstCSVOutput.Count, files.Length); // Export to CSV ExportToCsv(lstCSVOutput, Response); } /// <summary> /// Exports to CSV /// </summary> /// <param name="lstCSVOutput"></param> private static void ExportToCsv(List<CSVOutputFormat> lstCSVOutput, HttpResponse response) { System.Text.StringBuilder csvOutputContent = new System.Text.StringBuilder(string.Empty); csvOutputContent.Append("Barcode Value,Barcode Type,Scan DateTime,File Name"); foreach (var item in lstCSVOutput) { csvOutputContent.AppendFormat("\r\n{0},{1},{2},{3}", item.barcodeValue, item.barcodeType, item.scanDateTime, item.fileName); } // Perform download of file response.Clear(); response.ClearHeaders(); response.AppendHeader("Content-Length", csvOutputContent.Length.ToString()); response.ContentType = "text/csv"; response.AppendHeader("Content-Disposition", "attachment;filename=\"output.csv\""); response.Write(csvOutputContent.ToString()); response.End(); } } class CSVOutputFormat { public string barcodeValue { get; set; } public string barcodeType { get; set; } public string scanDateTime { get; set; } public string fileName { get; set; } } }

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Default.aspx.designer.cs
      
//------------------------------------------------------------------------------ // <auto-generated> // This code was generated by a tool. // // Changes to this file may cause incorrect behavior and will be lost if // the code is regenerated. // </auto-generated> //------------------------------------------------------------------------------ namespace ImagePDFBarcodeToCSV { public partial class Default { /// <summary> /// form1 control. /// </summary> /// <remarks> /// Auto-generated field. /// To modify move field declaration from designer file to code-behind file. /// </remarks> protected global::System.Web.UI.HtmlControls.HtmlForm form1; /// <summary> /// btnImagePDFBarcodeToCSV control. /// </summary> /// <remarks> /// Auto-generated field. /// To modify move field declaration from designer file to code-behind file. /// </remarks> protected global::System.Web.UI.WebControls.Button btnImagePDFBarcodeToCSV; /// <summary> /// lblInfo control. /// </summary> /// <remarks> /// Auto-generated field. /// To modify move field declaration from designer file to code-behind file. /// </remarks> protected global::System.Web.UI.WebControls.Label lblInfo; } }

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Web.config
      
<?xml version="1.0" encoding="utf-8"?> <!-- For more information on how to configure your ASP.NET application, please visit https://go.microsoft.com/fwlink/?LinkId=169433 --> <configuration> <system.web> <compilation debug="true" targetFramework="4.0" /> </system.web> </configuration>

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