Stamp Text & Image on PDFs using C# and IronPDF

Curtis Chau

Updated: 2026年6月3日

IronPDF使用BarcodeStamper類將文字、圖像、HTML內容和條形碼加蓋到現有的PDF文件中，並具有精確的定位控制。

加蓋是在現有的PDF文件上覆蓋附加內容。加蓋可以在PDF上新增資訊、標籤、水印或註釋。使用加蓋功能新增頁眉和頁腳或使用IronPDF的綜合加蓋功能建立自定義水印。

IronPDF提供四個加蓋器：BarcodeStamper。 HTMLStamper利用所有HTML功能並帶有CSS樣式，類似於將HTML字串轉換為PDF。

快速入門：立即在PDF上加蓋文字

使用IronPDF的TextStamper類為PDF文件新增文字注釋、水印或標籤。以下範例展示了使用ApplyStamp方法在PDF上加蓋文字。

1Install IronPDF with NuGet Package Manager
PM > Install-Package IronPdf
```
Install-Package IronPdf
```

2複製並運行這段程式碼片段。

var pdf = new IronPdf.PdfDocument("input.pdf");
var stamper = new IronPdf.Editing.TextStamper()
{
    Text = "Confidential",
    FontSize = 50,
    Opacity = 50,
    VerticalAlignment = IronPdf.Editing.VerticalAlignment.Middle,
    HorizontalAlignment = IronPdf.Editing.HorizontalAlignment.Center
};
pdf.ApplyStamp(stamper);
pdf.SaveAs("stamped.pdf");

var pdf = new IronPdf.PdfDocument("input.pdf");
var stamper = new IronPdf.Editing.TextStamper()
{
    Text = "Confidential",
    FontSize = 50,
    Opacity = 50,
    VerticalAlignment = IronPdf.Editing.VerticalAlignment.Middle,
    HorizontalAlignment = IronPdf.Editing.HorizontalAlignment.Center
};
pdf.ApplyStamp(stamper);
pdf.SaveAs("stamped.pdf");

3部署以在您的實時環境中測試

今天就開始在您的專案中使用IronPDF，透過免費試用

簡化工作流程（5個步驟）

下載C#程式庫以加蓋文字和圖像
建立並配置所需的加蓋器類
使用ApplyStamp方法將加蓋應用於PDF
使用ApplyMultipleStamps方法應用多個加蓋
指定特定頁面以應用加蓋

我如何在PDF上加蓋文字？

建立一個包含所有顯示配置的TextStamper物件。將ApplyStamp方法。 Text屬性設置顯示的文字。配置字體系列、字體樣式和加蓋位置。

TextStamper提供豐富的自定義選項，類似於管理PDF文件中的字體。通過將UseGoogleFont設置為true來使用系統字體或Google字體。

using IronPdf;
using IronPdf.Editing;

ChromePdfRenderer renderer = new ChromePdfRenderer();

PdfDocument pdf = renderer.RenderHtmlAsPdf("<h1>Example HTML Document!</h1>");

// Create text stamper
TextStamper textStamper = new TextStamper()
{
    Text = "Text Stamper!",
    FontFamily = "Bungee Spice",
    UseGoogleFont = true,
    FontSize = 30,
    IsBold = true,
    IsItalic = true,
    VerticalAlignment = VerticalAlignment.Top,
};

// Stamp the text stamper
pdf.ApplyStamp(textStamper);

pdf.SaveAs("stampText.pdf");

using IronPdf;
using IronPdf.Editing;

ChromePdfRenderer renderer = new ChromePdfRenderer();

PdfDocument pdf = renderer.RenderHtmlAsPdf("<h1>Example HTML Document!</h1>");

// Create text stamper
TextStamper textStamper = new TextStamper()
{
    Text = "Text Stamper!",
    FontFamily = "Bungee Spice",
    UseGoogleFont = true,
    FontSize = 30,
    IsBold = true,
    IsItalic = true,
    VerticalAlignment = VerticalAlignment.Top,
};

// Stamp the text stamper
pdf.ApplyStamp(textStamper);

pdf.SaveAs("stampText.pdf");

Imports IronPdf
Imports IronPdf.Editing

Private renderer As New ChromePdfRenderer()

Private pdf As PdfDocument = renderer.RenderHtmlAsPdf("<h1>Example HTML Document!</h1>")

' Create text stamper
Private textStamper As New TextStamper() With {
	.Text = "Text Stamper!",
	.FontFamily = "Bungee Spice",
	.UseGoogleFont = True,
	.FontSize = 30,
	.IsBold = True,
	.IsItalic = True,
	.VerticalAlignment = VerticalAlignment.Top
}

' Stamp the text stamper
pdf.ApplyStamp(textStamper)

pdf.SaveAs("stampText.pdf")

Imports IronPdf
Imports IronPdf.Editing

Private renderer As New ChromePdfRenderer()

Private pdf As PdfDocument = renderer.RenderHtmlAsPdf("<h1>Example HTML Document!</h1>")

' Create text stamper
Private textStamper As New TextStamper() With {
	.Text = "Text Stamper!",
	.FontFamily = "Bungee Spice",
	.UseGoogleFont = True,
	.FontSize = 30,
	.IsBold = True,
	.IsItalic = True,
	.VerticalAlignment = VerticalAlignment.Top
}

' Stamp the text stamper
pdf.ApplyStamp(textStamper)

pdf.SaveAs("stampText.pdf")

輸出PDF的樣子如何？

我如何建立多行文字加蓋？

在<br>標籤。例如，"line 1
line 2"在第一行生成"line 1"，在第二行生成"line 2"。這樣即可建立地址加蓋或多行水印。

我如何在PDF上加蓋圖像？

建立一個ApplyStamp方法將圖像應用於文件。該方法的第二個參數接受頁面索引以加蓋單頁或多頁。以下範例在PDF的第1頁上加蓋圖像。

提示: 所有頁面索引均使用從零開始的索引。

對於複雜的圖像操作，探索將圖像新增到PDF或使用base64編碼的圖像。

using IronPdf;
using IronPdf.Editing;
using System;

ChromePdfRenderer renderer = new ChromePdfRenderer();

PdfDocument pdf = renderer.RenderHtmlAsPdf("<h1>Example HTML Document!</h1>");

// Create image stamper
ImageStamper imageStamper = new ImageStamper(new Uri("https://ironpdf.com/img/svgs/iron-pdf-logo.svg"))
{
    VerticalAlignment = VerticalAlignment.Top,
};

// Stamp the image stamper
pdf.ApplyStamp(imageStamper, 0);

pdf.SaveAs("stampImage.pdf");

using IronPdf;
using IronPdf.Editing;
using System;

ChromePdfRenderer renderer = new ChromePdfRenderer();

PdfDocument pdf = renderer.RenderHtmlAsPdf("<h1>Example HTML Document!</h1>");

// Create image stamper
ImageStamper imageStamper = new ImageStamper(new Uri("https://ironpdf.com/img/svgs/iron-pdf-logo.svg"))
{
    VerticalAlignment = VerticalAlignment.Top,
};

// Stamp the image stamper
pdf.ApplyStamp(imageStamper, 0);

pdf.SaveAs("stampImage.pdf");

Imports IronPdf
Imports IronPdf.Editing
Imports System

Private renderer As New ChromePdfRenderer()

Private pdf As PdfDocument = renderer.RenderHtmlAsPdf("<h1>Example HTML Document!</h1>")

' Create image stamper
Private imageStamper As New ImageStamper(New Uri("https://ironpdf.com/img/svgs/iron-pdf-logo.svg")) With {.VerticalAlignment = VerticalAlignment.Top}

' Stamp the image stamper
pdf.ApplyStamp(imageStamper, 0)

pdf.SaveAs("stampImage.pdf")

Imports IronPdf
Imports IronPdf.Editing
Imports System

Private renderer As New ChromePdfRenderer()

Private pdf As PdfDocument = renderer.RenderHtmlAsPdf("<h1>Example HTML Document!</h1>")

' Create image stamper
Private imageStamper As New ImageStamper(New Uri("https://ironpdf.com/img/svgs/iron-pdf-logo.svg")) With {.VerticalAlignment = VerticalAlignment.Top}

' Stamp the image stamper
pdf.ApplyStamp(imageStamper, 0)

pdf.SaveAs("stampImage.pdf")

圖像加蓋的輸出樣子如何？

支持哪些圖像格式？

ImageStamper支持PNG、JPEG、GIF和SVG通過URI引用或文件路徑。確保遠程圖像的網路連接正常。對於Azure環境，可以考慮使用來自Azure Blob Storage的圖像。

我如何應用多個加蓋？

使用ApplyMultipleStamps通過傳遞一個加蓋器陣列來應用多個加蓋。此方法在一個操作中有效處理多個加蓋。

using IronPdf;
using IronPdf.Editing;

ChromePdfRenderer renderer = new ChromePdfRenderer();

PdfDocument pdf = renderer.RenderHtmlAsPdf("<h1>Example HTML Document!</h1>");

// Create two text stampers
TextStamper stamper1 = new TextStamper()
{
    Text = "Text stamp 1",
    VerticalAlignment = VerticalAlignment.Top,
    HorizontalAlignment = HorizontalAlignment.Left,
};

TextStamper stamper2 = new TextStamper()
{
    Text = "Text stamp 2",
    VerticalAlignment = VerticalAlignment.Top,
    HorizontalAlignment = HorizontalAlignment.Right,
};

Stamper[] stampersToApply = { stamper1, stamper2 };

// Apply multiple stamps
pdf.ApplyMultipleStamps(stampersToApply);

pdf.SaveAs("multipleStamps.pdf");

using IronPdf;
using IronPdf.Editing;

ChromePdfRenderer renderer = new ChromePdfRenderer();

PdfDocument pdf = renderer.RenderHtmlAsPdf("<h1>Example HTML Document!</h1>");

// Create two text stampers
TextStamper stamper1 = new TextStamper()
{
    Text = "Text stamp 1",
    VerticalAlignment = VerticalAlignment.Top,
    HorizontalAlignment = HorizontalAlignment.Left,
};

TextStamper stamper2 = new TextStamper()
{
    Text = "Text stamp 2",
    VerticalAlignment = VerticalAlignment.Top,
    HorizontalAlignment = HorizontalAlignment.Right,
};

Stamper[] stampersToApply = { stamper1, stamper2 };

// Apply multiple stamps
pdf.ApplyMultipleStamps(stampersToApply);

pdf.SaveAs("multipleStamps.pdf");

Imports IronPdf
Imports IronPdf.Editing

Private renderer As New ChromePdfRenderer()

Private pdf As PdfDocument = renderer.RenderHtmlAsPdf("<h1>Example HTML Document!</h1>")

' Create two text stampers
Private stamper1 As New TextStamper() With {
	.Text = "Text stamp 1",
	.VerticalAlignment = VerticalAlignment.Top,
	.HorizontalAlignment = HorizontalAlignment.Left
}

Private stamper2 As New TextStamper() With {
	.Text = "Text stamp 2",
	.VerticalAlignment = VerticalAlignment.Top,
	.HorizontalAlignment = HorizontalAlignment.Right
}

Private stampersToApply() As Stamper = { stamper1, stamper2 }

' Apply multiple stamps
pdf.ApplyMultipleStamps(stampersToApply)

pdf.SaveAs("multipleStamps.pdf")

Imports IronPdf
Imports IronPdf.Editing

Private renderer As New ChromePdfRenderer()

Private pdf As PdfDocument = renderer.RenderHtmlAsPdf("<h1>Example HTML Document!</h1>")

' Create two text stampers
Private stamper1 As New TextStamper() With {
	.Text = "Text stamp 1",
	.VerticalAlignment = VerticalAlignment.Top,
	.HorizontalAlignment = HorizontalAlignment.Left
}

Private stamper2 As New TextStamper() With {
	.Text = "Text stamp 2",
	.VerticalAlignment = VerticalAlignment.Top,
	.HorizontalAlignment = HorizontalAlignment.Right
}

Private stampersToApply() As Stamper = { stamper1, stamper2 }

' Apply multiple stamps
pdf.ApplyMultipleStamps(stampersToApply)

pdf.SaveAs("multipleStamps.pdf")

加蓋重疊時會發生什麼？

我可以混合不同型別的加蓋嗎？

BarcodeStamper。同時建立具有頁眉、頁腳、水印和識別程式碼的複雜文件佈局。

我如何控制加蓋位置？

使用一個3x3的網格定義加蓋位置，具有三個水平列和三個垂直行。選擇水平對齊方式：左，中心，右。選擇垂直對齊方式：頂部，中間，底部。調整水平和垂直偏移量以獲得精確的定位。請參閱下面的圖像以獲得視覺表示。

關鍵定位屬性是什麼？

HorizontalAlignment：相對於頁面的水平對齊。預設值：HorizontalAlignment.Center。
VerticalAlignment：相對於頁面的垂直對齊。預設值：VerticalAlignment.Middle。
HorizontalOffset：水平偏移。預設值：0，單位：MeasurementUnit.Percentage。正值向右偏移，負值向左偏移。
VerticalOffset：垂直偏移。預設值：0，單位：MeasurementUnit.Percentage。正值向下偏移，負值向上偏移。

我如何設置精確的偏移量？

使用VerticalOffset。預設測量單位為百分比。可用的單位包括英寸、毫米、厘米、像素和點。這允許在PDF文件中進行精確定位，例如設置自定義邊距。

程式碼

using IronPdf.Editing;
using System;

// Create text stamper
ImageStamper imageStamper = new ImageStamper(new Uri("https://ironpdf.com/img/svgs/iron-pdf-logo.svg"))
{
    HorizontalAlignment = HorizontalAlignment.Center,
    VerticalAlignment = VerticalAlignment.Top,

    // Specify offsets
    HorizontalOffset = new Length(10),
    VerticalOffset = new Length(10),
};

using IronPdf.Editing;
using System;

// Create text stamper
ImageStamper imageStamper = new ImageStamper(new Uri("https://ironpdf.com/img/svgs/iron-pdf-logo.svg"))
{
    HorizontalAlignment = HorizontalAlignment.Center,
    VerticalAlignment = VerticalAlignment.Top,

    // Specify offsets
    HorizontalOffset = new Length(10),
    VerticalOffset = new Length(10),
};

Imports IronPdf.Editing
Imports System

' Create text stamper
Private imageStamper As New ImageStamper(New Uri("https://ironpdf.com/img/svgs/iron-pdf-logo.svg")) With {
	.HorizontalAlignment = HorizontalAlignment.Center,
	.VerticalAlignment = VerticalAlignment.Top,
	.HorizontalOffset = New Length(10),
	.VerticalOffset = New Length(10)
}

Imports IronPdf.Editing
Imports System

' Create text stamper
Private imageStamper As New ImageStamper(New Uri("https://ironpdf.com/img/svgs/iron-pdf-logo.svg")) With {
	.HorizontalAlignment = HorizontalAlignment.Center,
	.VerticalAlignment = VerticalAlignment.Top,
	.HorizontalOffset = New Length(10),
	.VerticalOffset = New Length(10)
}

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Microsoft MVP

查看案例研究

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首席技術官，OPYN

查看案例研究

我如何加蓋HTML內容？

使用HtmlStamper類加蓋文字和圖像。 HtmlStamper使用CSS樣式渲染HTML設計，然後將其加蓋到PDF文件上。 HtmlBaseUrl屬性指定HTML字串資產的基本URL，如CSS和圖像文件。這使用與將HTML轉換為PDF相同的渲染引擎。

程式碼

using IronPdf;
using IronPdf.Editing;

ChromePdfRenderer renderer = new ChromePdfRenderer();

PdfDocument pdf = renderer.RenderHtmlAsPdf("<h1>Example HTML Document!</h1>");

// Create two text stampers
TextStamper stamper1 = new TextStamper()
{
    Text = "Text stamp 1",
    VerticalAlignment = VerticalAlignment.Top,
    HorizontalAlignment = HorizontalAlignment.Left,
};

TextStamper stamper2 = new TextStamper()
{
    Text = "Text stamp 2",
    VerticalAlignment = VerticalAlignment.Top,
    HorizontalAlignment = HorizontalAlignment.Right,
};

Stamper[] stampersToApply = { stamper1, stamper2 };

// Apply multiple stamps
pdf.ApplyMultipleStamps(stampersToApply);

pdf.SaveAs("multipleStamps.pdf");

using IronPdf;
using IronPdf.Editing;

ChromePdfRenderer renderer = new ChromePdfRenderer();

PdfDocument pdf = renderer.RenderHtmlAsPdf("<h1>Example HTML Document!</h1>");

// Create two text stampers
TextStamper stamper1 = new TextStamper()
{
    Text = "Text stamp 1",
    VerticalAlignment = VerticalAlignment.Top,
    HorizontalAlignment = HorizontalAlignment.Left,
};

TextStamper stamper2 = new TextStamper()
{
    Text = "Text stamp 2",
    VerticalAlignment = VerticalAlignment.Top,
    HorizontalAlignment = HorizontalAlignment.Right,
};

Stamper[] stampersToApply = { stamper1, stamper2 };

// Apply multiple stamps
pdf.ApplyMultipleStamps(stampersToApply);

pdf.SaveAs("multipleStamps.pdf");

Imports IronPdf
Imports IronPdf.Editing

Private renderer As New ChromePdfRenderer()

Private pdf As PdfDocument = renderer.RenderHtmlAsPdf("<h1>Example HTML Document!</h1>")

' Create two text stampers
Private stamper1 As New TextStamper() With {
	.Text = "Text stamp 1",
	.VerticalAlignment = VerticalAlignment.Top,
	.HorizontalAlignment = HorizontalAlignment.Left
}

Private stamper2 As New TextStamper() With {
	.Text = "Text stamp 2",
	.VerticalAlignment = VerticalAlignment.Top,
	.HorizontalAlignment = HorizontalAlignment.Right
}

Private stampersToApply() As Stamper = { stamper1, stamper2 }

' Apply multiple stamps
pdf.ApplyMultipleStamps(stampersToApply)

pdf.SaveAs("multipleStamps.pdf")

Imports IronPdf
Imports IronPdf.Editing

Private renderer As New ChromePdfRenderer()

Private pdf As PdfDocument = renderer.RenderHtmlAsPdf("<h1>Example HTML Document!</h1>")

' Create two text stampers
Private stamper1 As New TextStamper() With {
	.Text = "Text stamp 1",
	.VerticalAlignment = VerticalAlignment.Top,
	.HorizontalAlignment = HorizontalAlignment.Left
}

Private stamper2 As New TextStamper() With {
	.Text = "Text stamp 2",
	.VerticalAlignment = VerticalAlignment.Top,
	.HorizontalAlignment = HorizontalAlignment.Right
}

Private stampersToApply() As Stamper = { stamper1, stamper2 }

' Apply multiple stamps
pdf.ApplyMultipleStamps(stampersToApply)

pdf.SaveAs("multipleStamps.pdf")

HTML加蓋器的基本屬性是什麼？

Html：要加蓋到PDF的HTML片段。 JavaScript、CSS及圖像的外部引用相對於HtmlBaseUrl。
HtmlBaseUrl：外部CSS、JavaScript及圖像文件引用的基本URL。
CssMediaType：啟用Media="screen" CSS樣式。設置AllowScreenCss=false使用媒介為"print"的CSS來渲染加蓋。預設值：PdfCssMediaType.Screen。

為什麼要使用HTML加蓋器而不是文字加蓋器？

HTMLStamper提供完整的HTML和CSS支持，用於複雜的佈局、多種字體、顏色和嵌入的圖像在一個加蓋中。適合用於豐富內容的水印或頁眉。保持一致的品牌形象並支持響應式CSS設計。

我如何加蓋條形碼？

BarcodeStamper類直接在現有的PDF文件上加蓋條形碼。支持QRCode、Code128和Code39條形碼型別。

程式碼

using IronPdf;
using IronPdf.Editing;

ChromePdfRenderer renderer = new ChromePdfRenderer();

PdfDocument pdf = renderer.RenderHtmlAsPdf("<h1>Example HTML Document!</h1>");

// Create text stamper
TextStamper textStamper = new TextStamper()
{
    Text = "Text Stamper!",
    FontFamily = "Bungee Spice",
    UseGoogleFont = true,
    FontSize = 30,
    IsBold = true,
    IsItalic = true,
    VerticalAlignment = VerticalAlignment.Top,
};

// Stamp the text stamper
pdf.ApplyStamp(textStamper);

pdf.SaveAs("stampText.pdf");

using IronPdf;
using IronPdf.Editing;

ChromePdfRenderer renderer = new ChromePdfRenderer();

PdfDocument pdf = renderer.RenderHtmlAsPdf("<h1>Example HTML Document!</h1>");

// Create text stamper
TextStamper textStamper = new TextStamper()
{
    Text = "Text Stamper!",
    FontFamily = "Bungee Spice",
    UseGoogleFont = true,
    FontSize = 30,
    IsBold = true,
    IsItalic = true,
    VerticalAlignment = VerticalAlignment.Top,
};

// Stamp the text stamper
pdf.ApplyStamp(textStamper);

pdf.SaveAs("stampText.pdf");

Imports IronPdf
Imports IronPdf.Editing

Private renderer As New ChromePdfRenderer()

Private pdf As PdfDocument = renderer.RenderHtmlAsPdf("<h1>Example HTML Document!</h1>")

' Create text stamper
Private textStamper As New TextStamper() With {
	.Text = "Text Stamper!",
	.FontFamily = "Bungee Spice",
	.UseGoogleFont = True,
	.FontSize = 30,
	.IsBold = True,
	.IsItalic = True,
	.VerticalAlignment = VerticalAlignment.Top
}

' Stamp the text stamper
pdf.ApplyStamp(textStamper)

pdf.SaveAs("stampText.pdf")

Imports IronPdf
Imports IronPdf.Editing

Private renderer As New ChromePdfRenderer()

Private pdf As PdfDocument = renderer.RenderHtmlAsPdf("<h1>Example HTML Document!</h1>")

' Create text stamper
Private textStamper As New TextStamper() With {
	.Text = "Text Stamper!",
	.FontFamily = "Bungee Spice",
	.UseGoogleFont = True,
	.FontSize = 30,
	.IsBold = True,
	.IsItalic = True,
	.VerticalAlignment = VerticalAlignment.Top
}

' Stamp the text stamper
pdf.ApplyStamp(textStamper)

pdf.SaveAs("stampText.pdf")

有哪些條形碼配置選項？

Value：條形碼的字串值。
BarcodeType：支持QRCode、Code128和Code39的編碼型別。預設值：QRCode。
Width：以像素為單位的渲染條形碼寬度。預設值：250px。
Height：以像素為單位的渲染條形碼高度。預設值：250px。

我應該什麼時候使用每種條形碼型別？

QRCode處理URLs和大資料集（最多4296個字母數字字元）。 Code128適合有高密度要求的字母數字資料。 Code39適用於簡單的數字或大寫字母組合。在選擇條形碼型別時考慮掃描裝置的相容性。

有哪些其他加蓋選項？

這些屬性提供對加蓋外觀和行為的精細控制，類似於建立自定義水印。

我如何控制加蓋外觀？

Opacity：控制透明度。 0是不可見，100是不透明。
Rotation：將加蓋順時針旋轉0到360度。
MaxWidth：輸出加蓋的最大寬度。
MaxHeight：輸出加蓋的最大高度。
MinWidth：輸出加蓋的最小寬度。
MinHeight：輸出加蓋的最小高度。
Hyperlink：為加蓋的元素新增單擊超連結。注意：HTML連結（a標籤）無法通過加蓋保留。
Scale：對加蓋應用百分比縮放。預設值：100（無效果）。
IsStampBehindContent：將加蓋置於內容後。如果內容是不透明的，加蓋可能不可見。
WaitFor：等待事件或時間。參見使用WaitFor來延遲PDF渲染。
Timeout：渲染超時以秒為單位。預設值：60。

最常用的屬性有哪些？

IsStampBehindContent建立水印。 Rotation調整視覺定位和大小。範例：

// Create a semi-transparent watermark behind content
TextStamper watermark = new TextStamper()
{
    Text = "CONFIDENTIAL",
    FontSize = 60,
    FontColorCode = "#CCCCCC",
    Opacity = 25,
    Rotation = -45,
    IsStampBehindContent = true,
    VerticalAlignment = VerticalAlignment.Middle,
    HorizontalAlignment = HorizontalAlignment.Center
};

// Create a semi-transparent watermark behind content
TextStamper watermark = new TextStamper()
{
    Text = "CONFIDENTIAL",
    FontSize = 60,
    FontColorCode = "#CCCCCC",
    Opacity = 25,
    Rotation = -45,
    IsStampBehindContent = true,
    VerticalAlignment = VerticalAlignment.Middle,
    HorizontalAlignment = HorizontalAlignment.Center
};

' Create a semi-transparent watermark behind content
Dim watermark As New TextStamper() With {
    .Text = "CONFIDENTIAL",
    .FontSize = 60,
    .FontColorCode = "#CCCCCC",
    .Opacity = 25,
    .Rotation = -45,
    .IsStampBehindContent = True,
    .VerticalAlignment = VerticalAlignment.Middle,
    .HorizontalAlignment = HorizontalAlignment.Center
}

' Create a semi-transparent watermark behind content
Dim watermark As New TextStamper() With {
    .Text = "CONFIDENTIAL",
    .FontSize = 60,
    .FontColorCode = "#CCCCCC",
    .Opacity = 25,
    .Rotation = -45,
    .IsStampBehindContent = True,
    .VerticalAlignment = VerticalAlignment.Middle,
    .HorizontalAlignment = HorizontalAlignment.Center
}

摘要

IronPDF的加蓋功能將文字、圖像、HTML內容和條形碼新增到現有的PDF文件。四個專用的加蓋器類具有豐富的自定義選項，可以建立帶有水印、頁眉、頁腳和註釋的專業文件。包含多種測量單位和對齊選項的定位系統確保每一像素都精確無誤。使用簡單的文字加蓋或具有CSS樣式的複雜HTML佈局。 IronPDF的加蓋API為企業級PDF操作提供靈活性和控制力。

常見問題

如何在 C# 中將文字浮水印新增到我的 PDF 文件中？

using IronPDF 的 TextStamper 類別來新增文字浮水印。建立一個 TextStamper 物件，設置屬性，如文字、字體大小和透明度，然後使用 ApplyStamp 方法。您可以使用 VerticalAlignment 和 HorizontalAlignment 屬性來精確定位浮水印。