ByteScout Premium Suite – ASP.NET VB – Decode page by page from pdf or tiff with barcode reader sdk

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ByteScout Premium Suite – ASP.NET VB – Decode page by page from pdf or tiff with barcode reader sdk

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ByteScout-Premium-Suite-ASP-NET-VB-Decode-page-by-page-from-pdf-or-tiff-with-barcode-reader-sdk.pdf

How to decode page by page from pdf or tiff with barcode reader sdk in ASP.NET VB with ByteScout Premium Suite

How to write a robust code in ASP.NET VB to decode page by page from pdf or tiff with barcode reader sdk with this step-by-step tutorial

Sample source code below will display you how to manage a complex task like decode page by page from pdf or tiff with barcode reader sdk in ASP.NET VB. What is ByteScout Premium Suite? It is the bundle that includes twelve SDK products from ByteScout including tools and components for PDF, barcodes, spreadsheets, screen video recording. It can help you to decode page by page from pdf or tiff with barcode reader sdk in your ASP.NET VB application.

These ASP.NET VB code samples for ASP.NET VB guide developers to speed up coding of the application when using ByteScout Premium Suite. Follow the instructions from scratch to work and copy the ASP.NET VB code. This basic programming language sample code for ASP.NET VB will do the whole work for you to decode page by page from pdf or tiff with barcode reader sdk.

If you want to try other source code samples then the free trial version of ByteScout Premium Suite is available for download from our website. Just try other source code samples for ASP.NET VB.

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Default.aspx

      <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="WebTestSharp._Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Web Barcode Reader Tester (C#)</title>
</head>
<body>
    <form id="form1" runat="server">
        <div>
            Click browse button to upload a PDF/TIFF document<br />
            <asp:FileUpload ID="FileUpload1" runat="server" /><br />
            <br />
            Page No. to read barcode from:
        <asp:TextBox ID="txtPageNo" Text="1" runat="server"></asp:TextBox>
            <br />
            <br />
            <asp:Button ID="UploadButton"
                Text="Upload file and read barcodes"
                OnClick="UploadButton_Click"
                runat="server"></asp:Button>
            <br />
            <br />
            <asp:Label ID="UploadStatusLabel" Text="" runat="server"></asp:Label>
            <br />
            <asp:ListBox ID="ListBox1" runat="server" Visible="False"></asp:ListBox><br />
            <br />
        </div>
    </form>
</body>
</html>

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Default.aspx.designer.vb

      '------------------------------------------------------------------------------
' <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>
'------------------------------------------------------------------------------

Option Strict On
Option Explicit On


Partial Public Class _Default
    
    '''<summary>
    '''form1 control.
    '''</summary>
    '''<remarks>
    '''Auto-generated field.
    '''To modify move field declaration from designer file to code-behind file.
    '''</remarks>
    Protected WithEvents form1 As Global.System.Web.UI.HtmlControls.HtmlForm
    
    '''<summary>
    '''FileUpload1 control.
    '''</summary>
    '''<remarks>
    '''Auto-generated field.
    '''To modify move field declaration from designer file to code-behind file.
    '''</remarks>
    Protected WithEvents FileUpload1 As Global.System.Web.UI.WebControls.FileUpload
    
    '''<summary>
    '''txtPageNo control.
    '''</summary>
    '''<remarks>
    '''Auto-generated field.
    '''To modify move field declaration from designer file to code-behind file.
    '''</remarks>
    Protected WithEvents txtPageNo As Global.System.Web.UI.WebControls.TextBox
    
    '''<summary>
    '''UploadButton control.
    '''</summary>
    '''<remarks>
    '''Auto-generated field.
    '''To modify move field declaration from designer file to code-behind file.
    '''</remarks>
    Protected WithEvents UploadButton As Global.System.Web.UI.WebControls.Button
    
    '''<summary>
    '''UploadStatusLabel control.
    '''</summary>
    '''<remarks>
    '''Auto-generated field.
    '''To modify move field declaration from designer file to code-behind file.
    '''</remarks>
    Protected WithEvents UploadStatusLabel As Global.System.Web.UI.WebControls.Label
    
    '''<summary>
    '''ListBox1 control.
    '''</summary>
    '''<remarks>
    '''Auto-generated field.
    '''To modify move field declaration from designer file to code-behind file.
    '''</remarks>
    Protected WithEvents ListBox1 As Global.System.Web.UI.WebControls.ListBox
End Class

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Default.aspx.vb

      Imports Bytescout.BarCodeReader


Public Partial Class _Default
    Inherits 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 Sub UploadButton_Click(ByVal sender As Object, ByVal e As EventArgs)
        Dim savePath As String = "\uploads\"

        If FileUpload1.HasFile Then
            Dim fileName As [String] = FileUpload1.FileName
            savePath += fileName
            FileUpload1.SaveAs(Server.MapPath(savePath))

            Dim barcodeReader As New Reader()

            ' Limit search to 1D barcodes only (exclude 2D barcodes to speed up the search).
			' Change to barcodeReader.BarcodeTypesToFind.SetAll() to scan for all supported 1D and 2D barcodes 
			' or select specific type, e.g. barcodeReader.BarcodeTypesToFind.PDF417 = True
			barcodeReader.BarcodeTypesToFind.SetAll1D()

            'reader.MediumTrustLevelCompatible = true ' uncomment this line to enable Medium Trust compatible mode (slows down the recognition process as direct image data access is disabled in Medium Trust mode)

            ' Page No to read
            Dim PageNoToRead As Integer = Convert.ToInt32(txtPageNo.Text)

            UploadStatusLabel.Visible = False
            ListBox1.Items.Clear()
            ListBox1.Visible = True

            ListBox1.Items.Add("Reading barcode(s) from file """ + fileName + ", Page No:" + PageNoToRead.ToString())

            ' Reading barcode from document on page-by-page basic
            Dim barcodes As FoundBarcode() = barcodeReader.ReadFrom(Server.MapPath(savePath), (PageNoToRead - 1))

            If barcodes.Length = 0 Then
                ListBox1.Items.Add("No barcodes found")
            Else
                For Each barcode As FoundBarcode In barcodes
                    ListBox1.Items.Add(String.Format("Found barcode - Type: '{0}', Value: '{1}', Position: '{2}'", barcode.Type, barcode.Value, barcode.Rect.ToString()))
                Next
            End If

        Else
            ' Notify the user that a file was not uploaded.
            UploadStatusLabel.Text = "You did not specify a file to upload."
        End If
    End Sub
End Class

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Web.config

      <?xml version="1.0"?>
<configuration>
	<appSettings/>
	<connectionStrings/>
	<system.web>
    <httpRuntime maxRequestLength="1048576" />

    <!-- 
            Set compilation debug="true" to insert debugging 
            symbols into the compiled page. Because this 
            affects performance, set this value to true only 
            during development.
        -->
		<compilation debug="true" targetFramework="4.0"/>
		<!--
            The <authentication> section enables configuration 
            of the security authentication mode used by 
            ASP.NET to identify an incoming user. 
        -->
		<authentication mode="Windows"/>
		<!--
            The <customErrors> section enables configuration 
            of what to do if/when an unhandled error occurs 
            during the execution of a request. Specifically, 
            it enables developers to configure html error pages 
            to be displayed in place of a error stack trace.

        <customErrors mode="RemoteOnly" defaultRedirect="GenericErrorPage.htm">
            <error statusCode="403" redirect="NoAccess.htm" />
            <error statusCode="404" redirect="FileNotFound.htm" />
        </customErrors>
        -->
		<pages controlRenderingCompatibilityVersion="3.5" clientIDMode="AutoID"/></system.web>
</configuration>