如何為QR碼新增邊距

Updated: 2025年12月22日

正確縮放QR碼是平衡品牌廣告中視覺衝擊力與技術可讀性的關鍵步驟。為達成此目標，使用邊距（通常稱為"留白區"）可以改善QR碼的可讀性，並確保掃描裝置能夠在獨特的佈局中正確識別程式碼。對寬度、高度和整體比例的具體調整會直接影響最終的輸出比例和視覺呈現。

本指南演示如何使用邊距有效地調整和框定您的QR碼，以確保完美契合任何專業佈局。

如何為QR碼新增邊距

下載IronQR C#程式庫以新增QR碼邊距
使用QrWriter產生具有字串值的QR碼
使用Margins屬性為所有四個邊應用統一的留白區
使用MarginTop、MarginBottom、MarginLeft、MarginRight為QR碼的每一邊應用邊距
將QR碼保存為圖像以供外部使用

新增QR碼的邊距

可以通過在Margins屬性來建立適當的留白區。此屬性接受一個整數，定義QR碼所有四邊的統一空白邊框。

在此範例中，我們定義了一個邊距為40像素的樣式配置，並在渲染過程中將這些設定應用到QR碼，然後將結果圖像保存為PNG文件。

using IronQr;
using IronSoftware.Drawing;

QrStyleOptions styleOptions = new QrStyleOptions
{
    // Set all margins to 40px
    Margins = 40,

};

string url = "https://ironsoftware.com/csharp/qr/";

// Create QR code
QrCode qr = QrWriter.Write(url);

// Save QR code as a bitmap using the style options
AnyBitmap qrImage = qr.Save(styleOptions);

// Save QR code bitmap as file
qrImage.SaveAs("qr-uniform-margins.png");

using IronQr;
using IronSoftware.Drawing;

QrStyleOptions styleOptions = new QrStyleOptions
{
    // Set all margins to 40px
    Margins = 40,

};

string url = "https://ironsoftware.com/csharp/qr/";

// Create QR code
QrCode qr = QrWriter.Write(url);

// Save QR code as a bitmap using the style options
AnyBitmap qrImage = qr.Save(styleOptions);

// Save QR code bitmap as file
qrImage.SaveAs("qr-uniform-margins.png");

Imports IronQr
Imports IronSoftware.Drawing

Dim styleOptions As New QrStyleOptions With {
    .Margins = 40
}

Dim url As String = "https://ironsoftware.com/csharp/qr/"

' Create QR code
Dim qr As QrCode = QrWriter.Write(url)

' Save QR code as a bitmap using the style options
Dim qrImage As AnyBitmap = qr.Save(styleOptions)

' Save QR code bitmap as file
qrImage.SaveAs("qr-uniform-margins.png")

Imports IronQr
Imports IronSoftware.Drawing

Dim styleOptions As New QrStyleOptions With {
    .Margins = 40
}

Dim url As String = "https://ironsoftware.com/csharp/qr/"

' Create QR code
Dim qr As QrCode = QrWriter.Write(url)

' Save QR code as a bitmap using the style options
Dim qrImage As AnyBitmap = qr.Save(styleOptions)

' Save QR code bitmap as file
qrImage.SaveAs("qr-uniform-margins.png")

輸出

為特定邊新增邊距

對於不對稱佈局，請在MarginRight屬性。這可提供對留白區每一邊的獨立精確控制。

在此範例中，為每個邊距自定義了值，並設定了特定的尺寸和背景顏色。

using IronQr;
using IronSoftware.Drawing;

// Configure QR code styling with individual margins and background color
QrStyleOptions combinedOptions = new QrStyleOptions
{
    Dimensions = 400,
    MarginTop = 50,
    MarginBottom = 50,
    MarginLeft = 20,
    MarginRight = 20,
    BackgroundColor = IronSoftware.Drawing.Color.LightYellow,
};

string url = "https://ironsoftware.com/";

// Generate QR code from URL
QrCode qrCombined = QrWriter.Write(url);

// Apply styling options and export as bitmap
AnyBitmap qrCombinedImage = qrCombined.Save(combinedOptions);

// Save QR code to file
qrCombinedImage.SaveAs("qr-custom-margins.png");

using IronQr;
using IronSoftware.Drawing;

// Configure QR code styling with individual margins and background color
QrStyleOptions combinedOptions = new QrStyleOptions
{
    Dimensions = 400,
    MarginTop = 50,
    MarginBottom = 50,
    MarginLeft = 20,
    MarginRight = 20,
    BackgroundColor = IronSoftware.Drawing.Color.LightYellow,
};

string url = "https://ironsoftware.com/";

// Generate QR code from URL
QrCode qrCombined = QrWriter.Write(url);

// Apply styling options and export as bitmap
AnyBitmap qrCombinedImage = qrCombined.Save(combinedOptions);

// Save QR code to file
qrCombinedImage.SaveAs("qr-custom-margins.png");

Imports IronQr
Imports IronSoftware.Drawing

' Configure QR code styling with individual margins and background color
Dim combinedOptions As New QrStyleOptions With {
    .Dimensions = 400,
    .MarginTop = 50,
    .MarginBottom = 50,
    .MarginLeft = 20,
    .MarginRight = 20,
    .BackgroundColor = IronSoftware.Drawing.Color.LightYellow
}

Dim url As String = "https://ironsoftware.com/"

' Generate QR code from URL
Dim qrCombined As QrCode = QrWriter.Write(url)

' Apply styling options and export as bitmap
Dim qrCombinedImage As AnyBitmap = qrCombined.Save(combinedOptions)

' Save QR code to file
qrCombinedImage.SaveAs("qr-custom-margins.png")

Imports IronQr
Imports IronSoftware.Drawing

' Configure QR code styling with individual margins and background color
Dim combinedOptions As New QrStyleOptions With {
    .Dimensions = 400,
    .MarginTop = 50,
    .MarginBottom = 50,
    .MarginLeft = 20,
    .MarginRight = 20,
    .BackgroundColor = IronSoftware.Drawing.Color.LightYellow
}

Dim url As String = "https://ironsoftware.com/"

' Generate QR code from URL
Dim qrCombined As QrCode = QrWriter.Write(url)

' Apply styling options and export as bitmap
Dim qrCombinedImage As AnyBitmap = qrCombined.Save(combinedOptions)

' Save QR code to file
qrCombinedImage.SaveAs("qr-custom-margins.png")