為了使用Aspose.Pdf for.Net在現有的PDF文件中填充表單字段,要使用到Form class。這個類提供了FillField方法允許您填補不同的字段。例如,你可以使用這種方法填寫一個文本字段或設置復選框和comob框值。首先,您需要創建一個輸入和輸出PDF文件參數的Form class類對象,然后調用FillField方法。在那之后,您需要調用Save方法來保存輸出PDF文件。

C#

//open document
Aspose.Pdf.Facades.Form pdfForm = new Aspose.Pdf.Facades.Form("input.pdf", "output.pdf");
//Fill the field "Name" with "Mike".
pdfForm.FillField("Name", "Mike");
//Choose the field "Gender" with "Male".
pdfForm.FillField("Gender", "Male");
//Fill the field "Telephone".
pdfForm.FillField("Telephone", "888.277.6734");
//Fill the field "Address".
pdfForm.FillField("Address", "41, Lily Street, Hurstville, NSW, 2220 Australia ");
//Choose the item "GradeTwo" of the Combo field "Grade".
pdfForm.FillField("Grade", "GradeTwo");
//use case for unchecking the checkbox "Lodging".
pdfForm.FillField("Lodging", "Off");
//save updated PDF
pdfForm.Save();

VB.NET

'open document
Dim pdfForm As New Aspose.Pdf.Facades.Form("input.pdf", "output.pdf")
'Fill the field "Name" with "Mike".
pdfForm.FillField("Name", "Mike")
'Choose the field "Gender" with "Male".
pdfForm.FillField("Gender", "Male")
'Fill the field "Telephone".
pdfForm.FillField("Telephone", "888.277.6734")
'Fill the field "Address".
pdfForm.FillField("Address", "41, Lily Street, Hurstville, NSW, 2220 Australia ")
'Choose the item "GradeTwo" of the Combo field "Grade".
pdfForm.FillField("Grade", "GradeTwo")
'use case for unchecking the checkbox "Lodging".
pdfForm.FillField("Lodging", "Off")
'save updated PDF
pdfForm.Save()