如何使用 .NET MAUI 建立桌面條碼應用程式（掃描器/生成器）

Curtis Chau

Updated: 2026年6月29日

對於全面的軟體解決方案，不僅僅是移動可存取性。能夠在桌面操作系統上原生部署，如 Windows 和 macOS，同樣至關重要。這種跨平台方法使企業能夠利用工作站的全部功率來處理高容量的任務，如資產追蹤和管理。

如果沒有適當的桌面支援，工作流程會中斷，或者更糟的是，強行轉移到能力較弱的裝置上。這在庫存管理中特別重要，因為辦公室員工需要生成批次程式碼或快速驗證掃描，而不需離開桌位。

IronBarcode 提供了必要的工具來實現這些功能，確保您的 .NET MAUI 應用程式可以在任何計算機上可靠運行。

在本文中，我們將解釋如何整合 IronBarcode 來構建一個 桌面條碼掃描器 和一個 桌面條碼生成器。

如何在 C# 中使用 .NET MAUI 建立桌面條碼應用程式

下載 IronBarcode C# 程式庫以整合 .NET MAUI（桌面平台架構）
使用 Read 讀取使用者上傳的條碼
向 .NET MAUI UI 顯示條碼值
使用 CreateBarcode 生成帶有字串值的條碼
在 .NET MAUI UI 中顯示生成的條碼並將其儲存為圖像

.NET MAUI 桌面應用程式

將 IronBarcode 整合到 .NET MAUI 應用程式中很簡單，因為程式庫原生支持桌面平台。在此範例中，我們將分別使用 IronBarcode 建立條碼掃描器和條碼生成器。

我們先從條碼掃描器開始。

條碼掃描器介面 XAML

對於 .NET MAUI 介面，實施了一個簡單的介面，允許使用者通過提交按鈕上傳條碼圖像。專案中的 MainPage.xaml 文件應替換為下述內容。

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             x:Class="MauiApp1.MainPage"
             BackgroundColor="{DynamicResource PageBackgroundColor}">

    <ScrollView>
        <VerticalStackLayout Spacing="25" Padding="30" VerticalOptions="Center">

            <Label Text="Desktop Barcode Scanner"
                   FontSize="32"
                   HorizontalOptions="Center" />

            <Image x:Name="ScannerImage"
                   HeightRequest="300"
                   WidthRequest="400"
                   BackgroundColor="#F0F0F0"
                   Aspect="AspectFit"
                   HorizontalOptions="Center" />

            <Button Text="Select Image to Scan"
                    Clicked="OnScanButtonClicked"
                    HorizontalOptions="Center" 
                    WidthRequest="200"/>

            <Label x:Name="ResultLabel"
                   Text="Result will appear here..."
                   FontSize="20"
                   HorizontalOptions="Center"
                   HorizontalTextAlignment="Center" />

        </VerticalStackLayout>
    </ScrollView>

</ContentPage>

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             x:Class="MauiApp1.MainPage"
             BackgroundColor="{DynamicResource PageBackgroundColor}">

    <ScrollView>
        <VerticalStackLayout Spacing="25" Padding="30" VerticalOptions="Center">

            <Label Text="Desktop Barcode Scanner"
                   FontSize="32"
                   HorizontalOptions="Center" />

            <Image x:Name="ScannerImage"
                   HeightRequest="300"
                   WidthRequest="400"
                   BackgroundColor="#F0F0F0"
                   Aspect="AspectFit"
                   HorizontalOptions="Center" />

            <Button Text="Select Image to Scan"
                    Clicked="OnScanButtonClicked"
                    HorizontalOptions="Center" 
                    WidthRequest="200"/>

            <Label x:Name="ResultLabel"
                   Text="Result will appear here..."
                   FontSize="20"
                   HorizontalOptions="Center"
                   HorizontalTextAlignment="Center" />

        </VerticalStackLayout>
    </ScrollView>

</ContentPage>

XML

桌面條碼掃描器邏輯 CS

接下來，實施使用者點擊按鈕時的邏輯。在 UI 中的掃描按鈕上附加了一個 OnScanButtonClicked 事件處理程式。

首先使用 PickPhotoAsync 讓使用者選擇要上傳的條碼，然後使用 OpenReadAsync 存取文件流。圖像資料立即使用 CopyToAsync 複製到 MemoryStream 中。這允許同時將資料用於在螢幕上顯示圖像以及使用 Read 方法掃描條碼。

最後，如果檢測到有效的條碼，則在 UI 中顯示條碼值；若未在圖像中找到條碼，則顯示紅色訊息。

在測試應用程式前，請將許可金鑰替換為您自己的。

using IronBarCode;

namespace MauiApp1
{
    public partial class MainPage : ContentPage
    {
        public MainPage()
        {
            InitializeComponent();
            // Your license key is set here
            IronBarCode.License.LicenseKey = "YOUR_KEY"
        }

        private async void OnScanButtonClicked(object sender, EventArgs e)
        {
            try
            {
                var fileResult = await MediaPicker.Default.PickPhotoAsync();

                if (fileResult != null)
                {
                    // 1. Copy the file content into a byte array or MemoryStream immediately
                    // This ensures we have the data in memory before the file closes
                    byte[] imageBytes;
                    using (var stream = await fileResult.OpenReadAsync())
                    using (var memoryStream = new MemoryStream())
                    {
                        await stream.CopyToAsync(memoryStream);
                        imageBytes = memoryStream.ToArray();
                    }

                    // 2. Set the Image Source for the UI
                    // We give the UI a FRESH stream from the bytes we just saved
                    ScannerImage.Source = ImageSource.FromStream(() => new MemoryStream(imageBytes));

                    // 3. Process the Barcode
                    // We give IronBarcode its OWN fresh stream from the same bytes
                    using (var processingStream = new MemoryStream(imageBytes))
                    {
                        // 4. Read the barcode with Read
                        var results = BarcodeReader.Read(processingStream);

                        // 5. Display barcode results
                        if (results != null && results.Count > 0)
                        {

                            // Successfully found barcode value
                            ResultLabel.Text = $"Success: {results[0].Value}";
                            ResultLabel.TextColor = Colors.Green;
                        }
                        else
                        {
                            // Image uploaded has no barcode or barcode value is not found
                            ResultLabel.Text = "No barcode detected.";
                            ResultLabel.TextColor = Colors.Red;
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                // Display any exception thrown in runtime
                ResultLabel.Text = $"Error: {ex.Message}";
                ResultLabel.TextColor = Colors.Red;
            }
        }
    }
}

using IronBarCode;

namespace MauiApp1
{
    public partial class MainPage : ContentPage
    {
        public MainPage()
        {
            InitializeComponent();
            // Your license key is set here
            IronBarCode.License.LicenseKey = "YOUR_KEY"
        }

        private async void OnScanButtonClicked(object sender, EventArgs e)
        {
            try
            {
                var fileResult = await MediaPicker.Default.PickPhotoAsync();

                if (fileResult != null)
                {
                    // 1. Copy the file content into a byte array or MemoryStream immediately
                    // This ensures we have the data in memory before the file closes
                    byte[] imageBytes;
                    using (var stream = await fileResult.OpenReadAsync())
                    using (var memoryStream = new MemoryStream())
                    {
                        await stream.CopyToAsync(memoryStream);
                        imageBytes = memoryStream.ToArray();
                    }

                    // 2. Set the Image Source for the UI
                    // We give the UI a FRESH stream from the bytes we just saved
                    ScannerImage.Source = ImageSource.FromStream(() => new MemoryStream(imageBytes));

                    // 3. Process the Barcode
                    // We give IronBarcode its OWN fresh stream from the same bytes
                    using (var processingStream = new MemoryStream(imageBytes))
                    {
                        // 4. Read the barcode with Read
                        var results = BarcodeReader.Read(processingStream);

                        // 5. Display barcode results
                        if (results != null && results.Count > 0)
                        {

                            // Successfully found barcode value
                            ResultLabel.Text = $"Success: {results[0].Value}";
                            ResultLabel.TextColor = Colors.Green;
                        }
                        else
                        {
                            // Image uploaded has no barcode or barcode value is not found
                            ResultLabel.Text = "No barcode detected.";
                            ResultLabel.TextColor = Colors.Red;
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                // Display any exception thrown in runtime
                ResultLabel.Text = $"Error: {ex.Message}";
                ResultLabel.TextColor = Colors.Red;
            }
        }
    }
}

Imports IronBarCode

Namespace MauiApp1
    Partial Public Class MainPage
        Inherits ContentPage

        Public Sub New()
            InitializeComponent()
            ' Your license key is set here
            IronBarCode.License.LicenseKey = "YOUR_KEY"
        End Sub

        Private Async Sub OnScanButtonClicked(ByVal sender As Object, ByVal e As EventArgs)
            Try
                Dim fileResult = Await MediaPicker.Default.PickPhotoAsync()

                If fileResult IsNot Nothing Then
                    ' 1. Copy the file content into a byte array or MemoryStream immediately
                    ' This ensures we have the data in memory before the file closes
                    Dim imageBytes As Byte()
                    Using stream = Await fileResult.OpenReadAsync(), memoryStream = New MemoryStream()
                        Await stream.CopyToAsync(memoryStream)
                        imageBytes = memoryStream.ToArray()
                    End Using

                    ' 2. Set the Image Source for the UI
                    ' We give the UI a FRESH stream from the bytes we just saved
                    ScannerImage.Source = ImageSource.FromStream(Function() New MemoryStream(imageBytes))

                    ' 3. Process the Barcode
                    ' We give IronBarcode its OWN fresh stream from the same bytes
                    Using processingStream = New MemoryStream(imageBytes)
                        ' 4. Read the barcode with Read
                        Dim results = BarcodeReader.Read(processingStream)

                        ' 5. Display barcode results
                        If results IsNot Nothing AndAlso results.Count > 0 Then
                            ' Successfully found barcode value
                            ResultLabel.Text = $"Success: {results(0).Value}"
                            ResultLabel.TextColor = Colors.Green
                        Else
                            ' Image uploaded has no barcode or barcode value is not found
                            ResultLabel.Text = "No barcode detected."
                            ResultLabel.TextColor = Colors.Red
                        End If
                    End Using
                End If
            Catch ex As Exception
                ' Display any exception thrown in runtime
                ResultLabel.Text = $"Error: {ex.Message}"
                ResultLabel.TextColor = Colors.Red
            End Try
        End Sub
    End Class
End Namespace

Imports IronBarCode

Namespace MauiApp1
    Partial Public Class MainPage
        Inherits ContentPage

        Public Sub New()
            InitializeComponent()
            ' Your license key is set here
            IronBarCode.License.LicenseKey = "YOUR_KEY"
        End Sub

        Private Async Sub OnScanButtonClicked(ByVal sender As Object, ByVal e As EventArgs)
            Try
                Dim fileResult = Await MediaPicker.Default.PickPhotoAsync()

                If fileResult IsNot Nothing Then
                    ' 1. Copy the file content into a byte array or MemoryStream immediately
                    ' This ensures we have the data in memory before the file closes
                    Dim imageBytes As Byte()
                    Using stream = Await fileResult.OpenReadAsync(), memoryStream = New MemoryStream()
                        Await stream.CopyToAsync(memoryStream)
                        imageBytes = memoryStream.ToArray()
                    End Using

                    ' 2. Set the Image Source for the UI
                    ' We give the UI a FRESH stream from the bytes we just saved
                    ScannerImage.Source = ImageSource.FromStream(Function() New MemoryStream(imageBytes))

                    ' 3. Process the Barcode
                    ' We give IronBarcode its OWN fresh stream from the same bytes
                    Using processingStream = New MemoryStream(imageBytes)
                        ' 4. Read the barcode with Read
                        Dim results = BarcodeReader.Read(processingStream)

                        ' 5. Display barcode results
                        If results IsNot Nothing AndAlso results.Count > 0 Then
                            ' Successfully found barcode value
                            ResultLabel.Text = $"Success: {results(0).Value}"
                            ResultLabel.TextColor = Colors.Green
                        Else
                            ' Image uploaded has no barcode or barcode value is not found
                            ResultLabel.Text = "No barcode detected."
                            ResultLabel.TextColor = Colors.Red
                        End If
                    End Using
                End If
            Catch ex As Exception
                ' Display any exception thrown in runtime
                ResultLabel.Text = $"Error: {ex.Message}"
                ResultLabel.TextColor = Colors.Red
            End Try
        End Sub
    End Class
End Namespace

找到條碼值的輸出

如您所見，應用程式顯示了條碼結果和上傳的條碼圖像。

未找到條碼值的輸出

如您所見，當使用者上傳不包含條碼的圖像時，它顯示紅色訊息"未找到條碼"。

桌面條碼生成器

接下來，基於相同的概念，通過將 IronBarcode 整合到 MAUI 來建立條碼生成器。

條碼生成器介面 XAML

生成器的介面中實施了一個簡單的表單，以允許文字輸入和通過下拉選單選擇條碼型別。包括一個按鈕來觸發生成和保存過程，以及顯示結果的圖像檢視。應將 MainPage.xaml 文件替換為下述內容。

請參閱此處獲取 1D 條碼的完整清單，並參考此處了解 2D 條碼。

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             x:Class="MauiApp1.MainPage"
             BackgroundColor="{DynamicResource PageBackgroundColor}">

    <ScrollView>
        <VerticalStackLayout Spacing="20" Padding="30" VerticalOptions="Center">

            <Label Text="Barcode Generator"
                   FontSize="32"
                   HorizontalOptions="Center" />

            <Entry x:Name="BarcodeEntry"
                   Placeholder="Enter value (e.g. 12345 or https://ironsoftware.com)"
                   WidthRequest="300" />

            <Picker x:Name="BarcodeTypePicker"
                    Title="Select Barcode Type"
                    WidthRequest="300">
                <Picker.ItemsSource>
                    <x:Array Type="{x:Type x:String}">
                        <x:String>QRCode</x:String>
                        <x:String>Code128</x:String>
                        <x:String>EAN13</x:String>
                        <x:String>Code39</x:String>
                        <x:String>PDF417</x:String>
                    </x:Array>
                </Picker.ItemsSource>
            </Picker>

            <Button Text="Generate &amp; Save"
                    Clicked="OnGenerateButtonClicked"
                    HorizontalOptions="Center"
                    WidthRequest="200" />

            <Image x:Name="GeneratedImage"
                   HeightRequest="200"
                   WidthRequest="300"
                   BackgroundColor="#F0F0F0"
                   Aspect="AspectFit" />

            <Label x:Name="StatusLabel"
                   FontSize="16"
                   HorizontalOptions="Center"
                   HorizontalTextAlignment="Center" />

        </VerticalStackLayout>
    </ScrollView>

</ContentPage>

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             x:Class="MauiApp1.MainPage"
             BackgroundColor="{DynamicResource PageBackgroundColor}">

    <ScrollView>
        <VerticalStackLayout Spacing="20" Padding="30" VerticalOptions="Center">

            <Label Text="Barcode Generator"
                   FontSize="32"
                   HorizontalOptions="Center" />

            <Entry x:Name="BarcodeEntry"
                   Placeholder="Enter value (e.g. 12345 or https://ironsoftware.com)"
                   WidthRequest="300" />

            <Picker x:Name="BarcodeTypePicker"
                    Title="Select Barcode Type"
                    WidthRequest="300">
                <Picker.ItemsSource>
                    <x:Array Type="{x:Type x:String}">
                        <x:String>QRCode</x:String>
                        <x:String>Code128</x:String>
                        <x:String>EAN13</x:String>
                        <x:String>Code39</x:String>
                        <x:String>PDF417</x:String>
                    </x:Array>
                </Picker.ItemsSource>
            </Picker>

            <Button Text="Generate &amp; Save"
                    Clicked="OnGenerateButtonClicked"
                    HorizontalOptions="Center"
                    WidthRequest="200" />

            <Image x:Name="GeneratedImage"
                   HeightRequest="200"
                   WidthRequest="300"
                   BackgroundColor="#F0F0F0"
                   Aspect="AspectFit" />

            <Label x:Name="StatusLabel"
                   FontSize="16"
                   HorizontalOptions="Center"
                   HorizontalTextAlignment="Center" />

        </VerticalStackLayout>
    </ScrollView>

</ContentPage>

XML

桌面條碼生成器邏輯 CS

接下來，實施按鈕點擊事件的邏輯。在 UI 的生成按鈕上附加了一個 OnGenerateButtonClicked 事件處理程式。

驗證使用者輸入以確保存在文字且選擇了一種型別，然後將選擇映射到正確的 BarcodeEncoding。使用 BarcodeWriter.CreateBarcode 生成圖像，調整大小，並轉換為 JPEG 二進位資料。然後使用 MemoryStream 將圖像顯示在螢幕上。

最後，使用 File.WriteAllBytes 將生成的條碼文件直接儲存到使用者的桌面，並更新狀態標籤確認儲存位置。

在測試應用程式前，請將許可金鑰替換為您自己的。

using IronBarCode;
using System.IO; // Required for saving files

namespace MauiApp1
{
    public partial class MainPage : ContentPage
    {
        public MainPage()
        {
            InitializeComponent();
            IronBarCode.License.LicenseKey = "YOUR-KEY";

            // Set default selection
            BarcodeTypePicker.SelectedIndex = 0;
        }

        private void OnGenerateButtonClicked(object sender, EventArgs e)
        {
            try
            {
                // 1. Get and Validate Input
                string text = BarcodeEntry.Text;

                if (string.IsNullOrWhiteSpace(text))
                {
                    StatusLabel.Text = "Error: Please enter text.";
                    StatusLabel.TextColor = Colors.Red;
                    return;
                }

                if (BarcodeTypePicker.SelectedIndex == -1)
                {
                    StatusLabel.Text = "Error: Please select a type.";
                    StatusLabel.TextColor = Colors.Red;
                    return;
                }

                // 2. Determine Encoding Type
                string selectedType = BarcodeTypePicker.SelectedItem.ToString();
                BarcodeEncoding encoding = BarcodeEncoding.QRCode;

                switch (selectedType)
                {
                    case "QRCode": encoding = BarcodeEncoding.QRCode; break;
                    case "Code128": encoding = BarcodeEncoding.Code128; break;
                    case "EAN13": encoding = BarcodeEncoding.EAN13; break;
                    case "Code39": encoding = BarcodeEncoding.Code39; break;
                    case "PDF417": encoding = BarcodeEncoding.PDF417; break;
                }

                // 3. Generate Barcode
                var barcode = BarcodeWriter.CreateBarcode(text, encoding);
                barcode.ResizeTo(400, 200); // Optional resizing

                // 4. Convert to Bytes (JPEG)
                var bytes = barcode.ToJpegBinaryData();

                // 5. Update UI
                GeneratedImage.Source = ImageSource.FromStream(() => new MemoryStream(bytes));

                // 6. Save to Desktop automatically
                string desktopPath = Environment.GetFolderPath(Environment.SpecialFolder.Desktop);
                string fileName = $"barcode_{DateTime.Now:yyyyMMdd_HHmmss}.jpg";
                string fullPath = Path.Combine(desktopPath, fileName);

                File.WriteAllBytes(fullPath, bytes);

                // 7. Show Success Message
                StatusLabel.Text = $"Saved to Desktop:\n{fileName}";
                StatusLabel.TextColor = Colors.Green;
            }
            catch (Exception ex)
            {
                StatusLabel.Text = $"Error: {ex.Message}";
                StatusLabel.TextColor = Colors.Red;
            }
        }
    }
}

using IronBarCode;
using System.IO; // Required for saving files

namespace MauiApp1
{
    public partial class MainPage : ContentPage
    {
        public MainPage()
        {
            InitializeComponent();
            IronBarCode.License.LicenseKey = "YOUR-KEY";

            // Set default selection
            BarcodeTypePicker.SelectedIndex = 0;
        }

        private void OnGenerateButtonClicked(object sender, EventArgs e)
        {
            try
            {
                // 1. Get and Validate Input
                string text = BarcodeEntry.Text;

                if (string.IsNullOrWhiteSpace(text))
                {
                    StatusLabel.Text = "Error: Please enter text.";
                    StatusLabel.TextColor = Colors.Red;
                    return;
                }

                if (BarcodeTypePicker.SelectedIndex == -1)
                {
                    StatusLabel.Text = "Error: Please select a type.";
                    StatusLabel.TextColor = Colors.Red;
                    return;
                }

                // 2. Determine Encoding Type
                string selectedType = BarcodeTypePicker.SelectedItem.ToString();
                BarcodeEncoding encoding = BarcodeEncoding.QRCode;

                switch (selectedType)
                {
                    case "QRCode": encoding = BarcodeEncoding.QRCode; break;
                    case "Code128": encoding = BarcodeEncoding.Code128; break;
                    case "EAN13": encoding = BarcodeEncoding.EAN13; break;
                    case "Code39": encoding = BarcodeEncoding.Code39; break;
                    case "PDF417": encoding = BarcodeEncoding.PDF417; break;
                }

                // 3. Generate Barcode
                var barcode = BarcodeWriter.CreateBarcode(text, encoding);
                barcode.ResizeTo(400, 200); // Optional resizing

                // 4. Convert to Bytes (JPEG)
                var bytes = barcode.ToJpegBinaryData();

                // 5. Update UI
                GeneratedImage.Source = ImageSource.FromStream(() => new MemoryStream(bytes));

                // 6. Save to Desktop automatically
                string desktopPath = Environment.GetFolderPath(Environment.SpecialFolder.Desktop);
                string fileName = $"barcode_{DateTime.Now:yyyyMMdd_HHmmss}.jpg";
                string fullPath = Path.Combine(desktopPath, fileName);

                File.WriteAllBytes(fullPath, bytes);

                // 7. Show Success Message
                StatusLabel.Text = $"Saved to Desktop:\n{fileName}";
                StatusLabel.TextColor = Colors.Green;
            }
            catch (Exception ex)
            {
                StatusLabel.Text = $"Error: {ex.Message}";
                StatusLabel.TextColor = Colors.Red;
            }
        }
    }
}

Imports IronBarCode
Imports System.IO ' Required for saving files

Namespace MauiApp1
    Public Partial Class MainPage
        Inherits ContentPage

        Public Sub New()
            InitializeComponent()
            IronBarCode.License.LicenseKey = "YOUR-KEY"

            ' Set default selection
            BarcodeTypePicker.SelectedIndex = 0
        End Sub

        Private Sub OnGenerateButtonClicked(sender As Object, e As EventArgs)
            Try
                ' 1. Get and Validate Input
                Dim text As String = BarcodeEntry.Text

                If String.IsNullOrWhiteSpace(text) Then
                    StatusLabel.Text = "Error: Please enter text."
                    StatusLabel.TextColor = Colors.Red
                    Return
                End If

                If BarcodeTypePicker.SelectedIndex = -1 Then
                    StatusLabel.Text = "Error: Please select a type."
                    StatusLabel.TextColor = Colors.Red
                    Return
                End If

                ' 2. Determine Encoding Type
                Dim selectedType As String = BarcodeTypePicker.SelectedItem.ToString()
                Dim encoding As BarcodeEncoding = BarcodeEncoding.QRCode

                Select Case selectedType
                    Case "QRCode"
                        encoding = BarcodeEncoding.QRCode
                    Case "Code128"
                        encoding = BarcodeEncoding.Code128
                    Case "EAN13"
                        encoding = BarcodeEncoding.EAN13
                    Case "Code39"
                        encoding = BarcodeEncoding.Code39
                    Case "PDF417"
                        encoding = BarcodeEncoding.PDF417
                End Select

                ' 3. Generate Barcode
                Dim barcode = BarcodeWriter.CreateBarcode(text, encoding)
                barcode.ResizeTo(400, 200) ' Optional resizing

                ' 4. Convert to Bytes (JPEG)
                Dim bytes = barcode.ToJpegBinaryData()

                ' 5. Update UI
                GeneratedImage.Source = ImageSource.FromStream(Function() New MemoryStream(bytes))

                ' 6. Save to Desktop automatically
                Dim desktopPath As String = Environment.GetFolderPath(Environment.SpecialFolder.Desktop)
                Dim fileName As String = $"barcode_{DateTime.Now:yyyyMMdd_HHmmss}.jpg"
                Dim fullPath As String = Path.Combine(desktopPath, fileName)

                File.WriteAllBytes(fullPath, bytes)

                ' 7. Show Success Message
                StatusLabel.Text = $"Saved to Desktop:{Environment.NewLine}{fileName}"
                StatusLabel.TextColor = Colors.Green
            Catch ex As Exception
                StatusLabel.Text = $"Error: {ex.Message}"
                StatusLabel.TextColor = Colors.Red
            End Try
        End Sub
    End Class
End Namespace

Imports IronBarCode
Imports System.IO ' Required for saving files

Namespace MauiApp1
    Public Partial Class MainPage
        Inherits ContentPage

        Public Sub New()
            InitializeComponent()
            IronBarCode.License.LicenseKey = "YOUR-KEY"

            ' Set default selection
            BarcodeTypePicker.SelectedIndex = 0
        End Sub

        Private Sub OnGenerateButtonClicked(sender As Object, e As EventArgs)
            Try
                ' 1. Get and Validate Input
                Dim text As String = BarcodeEntry.Text

                If String.IsNullOrWhiteSpace(text) Then
                    StatusLabel.Text = "Error: Please enter text."
                    StatusLabel.TextColor = Colors.Red
                    Return
                End If

                If BarcodeTypePicker.SelectedIndex = -1 Then
                    StatusLabel.Text = "Error: Please select a type."
                    StatusLabel.TextColor = Colors.Red
                    Return
                End If

                ' 2. Determine Encoding Type
                Dim selectedType As String = BarcodeTypePicker.SelectedItem.ToString()
                Dim encoding As BarcodeEncoding = BarcodeEncoding.QRCode

                Select Case selectedType
                    Case "QRCode"
                        encoding = BarcodeEncoding.QRCode
                    Case "Code128"
                        encoding = BarcodeEncoding.Code128
                    Case "EAN13"
                        encoding = BarcodeEncoding.EAN13
                    Case "Code39"
                        encoding = BarcodeEncoding.Code39
                    Case "PDF417"
                        encoding = BarcodeEncoding.PDF417
                End Select

                ' 3. Generate Barcode
                Dim barcode = BarcodeWriter.CreateBarcode(text, encoding)
                barcode.ResizeTo(400, 200) ' Optional resizing

                ' 4. Convert to Bytes (JPEG)
                Dim bytes = barcode.ToJpegBinaryData()

                ' 5. Update UI
                GeneratedImage.Source = ImageSource.FromStream(Function() New MemoryStream(bytes))

                ' 6. Save to Desktop automatically
                Dim desktopPath As String = Environment.GetFolderPath(Environment.SpecialFolder.Desktop)
                Dim fileName As String = $"barcode_{DateTime.Now:yyyyMMdd_HHmmss}.jpg"
                Dim fullPath As String = Path.Combine(desktopPath, fileName)

                File.WriteAllBytes(fullPath, bytes)

                ' 7. Show Success Message
                StatusLabel.Text = $"Saved to Desktop:{Environment.NewLine}{fileName}"
                StatusLabel.TextColor = Colors.Green
            Catch ex As Exception
                StatusLabel.Text = $"Error: {ex.Message}"
                StatusLabel.TextColor = Colors.Red
            End Try
        End Sub
    End Class
End Namespace