概述
PDF中的文本域可以通过设置不同格式，用于显示数字、货币、日期、时间、邮政编码、电话号码和社保号等等。Adobe Acrobat提供了许多固定的JavaScripts用来设置和验证文本域的格式，如：AFNumber_Format(2, 0, 0, 0, "$", true)和AFNumber_Keystroke(2, 0, 0, 0, "$", true)。Format后缀的script是用来设置文本域显示的格式，而Keystroke后缀的script是用来验证输入内容。
Spire.PDF for .NET提供了相应的方法来设置和验证文本域格式。下面的表格罗列了常用的格式和Spire.PDF中对应的方法，可参考使用：
引入dll
1.通过NuGet安装dll（2种方法）
1.1 可以在Visual Studio中打开“解决方案资源管理器”，鼠标右键点击“引用”，“管理NuGet包”，然后搜索“Spire.PDF”，点击“安装”。
1.2 将以下内容复制到PM控制台安装。
Install-Package Spire.PDF -Version 7.12.1
2.手动添加dll引用
可通过手动下载包，然后解压，找到BIN文件夹下的Spire.Pdf.dll。在Visual Studio中打开“解决方案资源管理器”，鼠标右键点击“引用”，“添加引用”将本地路径BIN文件夹下的dll文件添加引用至程序。
代码（C#/VB.NET）
C#
using Spire.Pdf;
using Spire.Pdf.Actions;
using Spire.Pdf.Fields;
using System.Drawing;
namespace SetTextFormatInTextboxField
{
class Program
{
static void Main(string[] args)
{
//新建PDF文档,并添加空白页
PdfDocument pdf = new PdfDocument();
PdfPageBase page = pdf.Pages.Add();
//定义坐标变量
float X = 10;
float Y = 10;
float width = 100;
float height = 20;
//实例化一个文本域对象，并设置它的位置和边框样式
PdfTextBoxField textbox = new PdfTextBoxField(page, "Number-TextBox");
textbox.Bounds = new RectangleF(X, Y, width, height);
textbox.BorderWidth = 0.75f;
textbox.BorderStyle = PdfBorderStyle.Solid;
//给文本域的键盘击键事件设置一个JavaScript动作用于验证输入内容是否符合要求
string js = PdfJavaScript.GetNumberKeystrokeString(2, 0, 0, 0, "$", true);
PdfJavaScriptAction jsAction = new PdfJavaScriptAction(js);
textbox.Actions.KeyPressed = jsAction;
//设置文本域内容显示为数字货币
js = PdfJavaScript.GetNumberFormatString(2, 0, 0, 0, "$", true);
jsAction = new PdfJavaScriptAction(js);
textbox.Actions.Format = jsAction;
//添加文本域到PDF中,并保存文档
pdf.Form.Fields.Add(textbox);
//添加文本框，设置文本内容显示为日期格式
PdfTextBoxField textbox1 = new PdfTextBoxField(page, "DateFormat-TextBox");
textbox1.Bounds = new RectangleF(X+200, Y, width, height);
textbox1.BorderWidth = 0.75f;
textbox1.BorderStyle = PdfBorderStyle.Solid;
string js1 = PdfJavaScript.GetDateKeystrokeString("mm/dd/yyyy");
PdfJavaScriptAction jsAction1 = new PdfJavaScriptAction(js1);
textbox1.Actions.KeyPressed = jsAction1;
js1 = PdfJavaScript.GetDateFormatString("mm/dd/yyyy");
jsAction1 = new PdfJavaScriptAction(js1);
textbox1.Actions.Format = jsAction1;
pdf.Form.Fields.Add(textbox1);
//添加文本框，设置文本内容显示为邮政编码格式
PdfTextBoxField textbox2 = new PdfTextBoxField(page, "SpecialFormat0-1-TextBox");
textbox2.Bounds = new RectangleF(X + 400, Y, width, height);
textbox2.BorderWidth = 0.75f;
textbox2.BorderStyle = PdfBorderStyle.Solid;
//string js2 = PdfJavaScript.GetSpecialKeystrokeString(0);
string js2 = PdfJavaScript.GetSpecialKeystrokeString(1);
PdfJavaScriptAction jsAction2 = new PdfJavaScriptAction(js2);
textbox2.Actions.KeyPressed = jsAction2;
//js2 = PdfJavaScript.GetSpecialFormatString(0);
js2 = PdfJavaScript.GetSpecialFormatString(1);
jsAction2 = new PdfJavaScriptAction(js2);
textbox2.Actions.Format = jsAction2;
pdf.Form.Fields.Add(textbox2);
//添加文本框，设置文本内容显示为百分数
PdfTextBoxField textbox3 = new PdfTextBoxField(page, "SpecialFormat2-TextBox");
textbox3.Bounds = new RectangleF(X, Y+50, width, height);
textbox3.BorderWidth = 0.75f;
textbox3.BorderStyle = PdfBorderStyle.Solid;
string js3 = PdfJavaScript.GetPercentKeystrokeString(1,0);
PdfJavaScriptAction jsAction3 = new PdfJavaScriptAction(js3);
textbox3.Actions.KeyPressed = jsAction3;
js3 = PdfJavaScript.GetPercentFormatString(1, 0);
jsAction3 = new PdfJavaScriptAction(js3);
textbox3.Actions.Format = jsAction3;
pdf.Form.Fields.Add(textbox3);
//添加文本框，设置数据验证
PdfTextBoxField textbox4 = new PdfTextBoxField(page, "RangeValidate-TextBox");
textbox4.Bounds = new RectangleF(X+200, Y + 50, width, height);
textbox4.BorderWidth = 0.75f;
textbox4.BorderStyle = PdfBorderStyle.Solid;
string js4 = PdfJavaScript.GetRangeValidateString(true, -18, true, 18);
PdfJavaScriptAction jsAction4 = new PdfJavaScriptAction(js4);
textbox4.Actions.Format = jsAction4;
pdf.Form.Fields.Add(textbox4);
//保存文档
pdf.SaveToFile("FormatField.pdf", FileFormat.PDF);
}
}
}VB.NET
Imports Spire.Pdf
Imports Spire.Pdf.Actions
Imports Spire.Pdf.Fields
Imports System.Drawing
Namespace SetTextFormatInTextboxField
Class Program
Private Shared Sub Main(args As String())
'新建PDF文档,并添加空白页
Dim pdf As New PdfDocument()
Dim page As PdfPageBase = pdf.Pages.Add()
'定义坐标变量
Dim X As Single = 10
Dim Y As Single = 10
Dim width As Single = 100
Dim height As Single = 20
'实例化一个文本域对象，并设置它的位置和边框样式
Dim textbox As New PdfTextBoxField(page, "Number-TextBox")
textbox.Bounds = New RectangleF(X, Y, width, height)
textbox.BorderWidth = 0.75F
textbox.BorderStyle = PdfBorderStyle.Solid
'给文本域的键盘击键事件设置一个JavaScript动作用于验证输入内容是否符合要求
Dim js As String = PdfJavaScript.GetNumberKeystrokeString(2, 0, 0, 0, "$", True)
Dim jsAction As New PdfJavaScriptAction(js)
textbox.Actions.KeyPressed = jsAction
'设置文本域内容显示为数字货币
js = PdfJavaScript.GetNumberFormatString(2, 0, 0, 0, "$", True)
jsAction = New PdfJavaScriptAction(js)
textbox.Actions.Format = jsAction
'添加文本域到PDF中,并保存文档
pdf.Form.Fields.Add(textbox)
'添加文本框，设置文本内容显示为日期格式
Dim textbox1 As New PdfTextBoxField(page, "DateFormat-TextBox")
textbox1.Bounds = New RectangleF(X + 200, Y, width, height)
textbox1.BorderWidth = 0.75F
textbox1.BorderStyle = PdfBorderStyle.Solid
Dim js1 As String = PdfJavaScript.GetDateKeystrokeString("mm/dd/yyyy")
Dim jsAction1 As New PdfJavaScriptAction(js1)
textbox1.Actions.KeyPressed = jsAction1
js1 = PdfJavaScript.GetDateFormatString("mm/dd/yyyy")
jsAction1 = New PdfJavaScriptAction(js1)
textbox1.Actions.Format = jsAction1
pdf.Form.Fields.Add(textbox1)
'添加文本框，设置文本内容显示为邮政编码格式
Dim textbox2 As New PdfTextBoxField(page, "SpecialFormat0-1-TextBox")
textbox2.Bounds = New RectangleF(X + 400, Y, width, height)
textbox2.BorderWidth = 0.75F
textbox2.BorderStyle = PdfBorderStyle.Solid
'string js2 = PdfJavaScript.GetSpecialKeystrokeString(0);
Dim js2 As String = PdfJavaScript.GetSpecialKeystrokeString(1)
Dim jsAction2 As New PdfJavaScriptAction(js2)
textbox2.Actions.KeyPressed = jsAction2
'js2 = PdfJavaScript.GetSpecialFormatString(0);
js2 = PdfJavaScript.GetSpecialFormatString(1)
jsAction2 = New PdfJavaScriptAction(js2)
textbox2.Actions.Format = jsAction2
pdf.Form.Fields.Add(textbox2)
'添加文本框，设置文本内容显示为百分数
Dim textbox3 As New PdfTextBoxField(page, "SpecialFormat2-TextBox")
textbox3.Bounds = New RectangleF(X, Y + 50, width, height)
textbox3.BorderWidth = 0.75F
textbox3.BorderStyle = PdfBorderStyle.Solid
Dim js3 As String = PdfJavaScript.GetPercentKeystrokeString(1, 0)
Dim jsAction3 As New PdfJavaScriptAction(js3)
textbox3.Actions.KeyPressed = jsAction3
js3 = PdfJavaScript.GetPercentFormatString(1, 0)
jsAction3 = New PdfJavaScriptAction(js3)
textbox3.Actions.Format = jsAction3
pdf.Form.Fields.Add(textbox3)
'添加文本框，设置数据验证
Dim textbox4 As New PdfTextBoxField(page, "RangeValidate-TextBox")
textbox4.Bounds = New RectangleF(X + 200, Y + 50, width, height)
textbox4.BorderWidth = 0.75F
textbox4.BorderStyle = PdfBorderStyle.Solid
Dim js4 As String = PdfJavaScript.GetRangeValidateString(True, -18, True, 18)
Dim jsAction4 As New PdfJavaScriptAction(js4)
textbox4.Actions.Format = jsAction4
pdf.Form.Fields.Add(textbox4)
'保存文档
pdf.SaveToFile("FormatField.pdf", FileFormat.PDF)
End Sub
End Class
End Namespace设置后的文本框域填写效果如图：
以上就是C#设置或验证PDF文本域格式的方法详解的详细内容，更多关于C#设置 验证PDF文本域格式的资料请关注编程网其它相关文章！
