Read Barcode | ASP.NET VBByteScout Barcode Reader SDK

Read Barcode | ASP.NET VB

Default.aspx.vb:

VB
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Imports Bytescout.BarCodeReader

Partial Public Class _Default
    Inherits 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 Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
        Image1.ImageUrl = "BarcodePhoto.jpg"

        Dim reader As New Reader()

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

        reader.ReadFromFile(Server.MapPath("BarcodePhoto.jpg"))

        For Each barcode As FoundBarcode In reader.FoundBarcodes
            ListBox1.Items.Add([String].Format("{0} : {1}", barcode.Type, barcode.Value))
        Next

    End Sub

End Class

Default.aspx:

VB
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<%@ Page Language="vb" AutoEventWireup="false" CodeBehind="Default.aspx.vb" Inherits="SimpleWebTestVB._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>Simple Web Barcode Reader Tester (VB)</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <div>
            <div>
                <br />
                <asp:ListBox ID="ListBox1" runat="server"></asp:ListBox><br />
                <br />
                <asp:Image ID="Image1" runat="server" />&nbsp;</div>
        </div>

    </div>
    </form>
</body>
</html>

Web.config:

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<?xml version="1.0"?>

<configuration>
  
    <appSettings/>
    <connectionStrings/>
  
    <system.web>
        <!-- 
            Set compilation debug="true" to insert debugging 
            symbols into the compiled page. Because this 
            affects performance, set this value to true only 
            during development.

            Visual Basic options:
            Set strict="true" to disallow all data type conversions 
            where data loss can occur. 
            Set explicit="true" to force declaration of all variables.
        -->
        <compilation debug="true" strict="false" explicit="true" />
        <pages>
            <namespaces>
                <clear />
                <add namespace="System" />
                <add namespace="System.Collections" />
                <add namespace="System.Collections.Specialized" />
                <add namespace="System.Configuration" />
                <add namespace="System.Text" />
                <add namespace="System.Text.RegularExpressions" />
                <add namespace="System.Web" />
                <add namespace="System.Web.Caching" />
                <add namespace="System.Web.SessionState" />
                <add namespace="System.Web.Security" />
                <add namespace="System.Web.Profile" />
                <add namespace="System.Web.UI" />
                <add namespace="System.Web.UI.WebControls" />
                <add namespace="System.Web.UI.WebControls.WebParts" />
                <add namespace="System.Web.UI.HtmlControls" />
            </namespaces>
        </pages>
        <!--
            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>
        -->
    </system.web>
</configuration>