C# 在PDF中创建和填充域

//创建PDF文档

PdfDocument pdf = new PdfDocument();
 
//添加一个新页面

PdfPageBase page = pdf.Pages.Add(PdfPageSize.A4, new PdfMargins()); 

//添加文本到页面

PdfTrueTypeFont font = new PdfTrueTypeFont(new Font("Arial Unicode MS", 10f), true);

page.Canvas.DrawString("年龄:", font, PdfBrushes.DeepSkyBlue, 10, 50); 

//创建文本域并指定文本域的名称 

PdfTextBoxField textbox = new PdfTextBoxField(page, "Age");           

//设置文本域的大小、位置、字体

textbox.Bounds = new RectangleF(40, 50, 50, 12);           

textbox.Font = font;
 
//添加文本域到文档 

pdf.Form.Fields.Add(textbox); 

//保存文档

pdf.SaveToFile("Fields.pdf");

//设置边框

textbox.BorderWidth = 0.75f;

textbox.BorderStyle = PdfBorderStyle.Solid;

textbox.BorderColor = Color.Black;
 

//设置背景色

textbox.BackColor = Color.Yellow;
 

//设置字体颜色

textbox.ForeColor = Color.Red;
 

//设置字体排列方式 

textbox.TextAlignment = PdfTextAlignment.Center;

//指定输入数据在1-100之间

string js = PdfJavaScript.GetRangeValidateString(true, 1, true, 100);

PdfJavaScriptAction jsAction = new PdfJavaScriptAction(js);

textbox.Actions.Validate = jsAction;

//创建签名域并指定域名

PdfSignatureField signaturefield = new PdfSignatureField(page, "Signature");
 

//设置域的边框

signaturefield.BorderWidth = 1.0f;

signaturefield.BorderStyle = PdfBorderStyle.Solid;

signaturefield.BorderColor = new PdfRGBColor(System.Drawing.Color.Black);

//设置高亮模式

signaturefield.HighlightMode = PdfHighlightMode.Outline;

//设置大小与位置

signaturefield.Bounds = new RectangleF(40, 150, 200, 100);
 

//将签名域添加到页面

pdf.Form.Fields.Add(signaturefield);

//加载PDF文档

PdfDocument pdf = new PdfDocument();

pdf.LoadFromFile("Fields.pdf");

//获取第一页

PdfPageBase page = pdf.Pages[0];

//获取文档的所有域

PdfFormWidget form = pdf.Form as PdfFormWidget;


//填充第一个文本域

PdfTextBoxFieldWidget textboxField = form.FieldsWidget[0] as PdfTextBoxFieldWidget;

textboxField.Text = "25";


//填充第二个签名域

PdfSignatureFieldWidget signatureField = form.FieldsWidget[1] as PdfSignatureFieldWidget;

String pfxPath = @"gary.pfx";

PdfCertificate digi = new PdfCertificate(pfxPath, "123456");                   

PdfSignature signature = new PdfSignature(pdf, page, digi, "demo", signatureField);

signature.IsTag = true;

signature.DigitalSigner = "Gary";

signature.ConfigGraphicType = ConfiguerGraphicType.TextSignInformation;


//保存文档

pdf.SaveToFile("Fill.pdf");