C#設置或驗證PDF文本域格式的方法詳解
概述
PDF中的文本域可以通過設置不同格式，用於顯示數字、貨幣、日期、時間、郵政編碼、電話號碼和社保號等等。Adobe Acrobat提供瞭許多固定的JavaScripts用來設置和驗證文本域的格式，如：AFNumber_Format(2, 0, 0, 0, "$", true)和AFNumber_Keystroke(2, 0, 0, 0, "$", true)。Format後綴的script是用來設置文本域顯示的格式，而Keystroke後綴的script是用來驗證輸入內容。
Spire.PDF for .NET提供瞭相應的方法來設置和驗證文本域格式。下面的表格羅列瞭常用的格式和Spire.PDF中對應的方法，可參考使用：
引入dll
1.通過NuGet安裝dll（2種方法）
1.1 可以在Visual Studio中打開“解決方案資源管理器”，鼠標右鍵點擊“引用”，“管理NuGet包”，然後搜索“Spire.PDF”，點擊“安裝”。
1.2 將以下內容復制到PM控制臺安裝。
Install-Package Spire.PDF -Version 7.12.1
2.手動添加dll引用
可通過手動下載包，然後解壓，找到BIN文件夾下的Spire.Pdf.dll。在Visual Studio中打開“解決方案資源管理器”，鼠標右鍵點擊“引用”，“添加引用”將本地路徑BIN文件夾下的dll文件添加引用至程序。
代碼（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文檔,並添加空白頁
PdfDocument pdf = new PdfDocument();
PdfPageBase page = pdf.Pages.Add();
//定義坐標變量
float X = 10;
float Y = 10;
float width = 100;
float height = 20;
//實例化一個文本域對象，並設置它的位置和邊框樣式
PdfTextBoxField textbox = new PdfTextBoxField(page, "Number-TextBox");
textbox.Bounds = new RectangleF(X, Y, width, height);
textbox.BorderWidth = 0.75f;
textbox.BorderStyle = PdfBorderStyle.Solid;
//給文本域的鍵盤擊鍵事件設置一個JavaScript動作用於驗證輸入內容是否符合要求
string js = PdfJavaScript.GetNumberKeystrokeString(2, 0, 0, 0, "$", true);
PdfJavaScriptAction jsAction = new PdfJavaScriptAction(js);
textbox.Actions.KeyPressed = jsAction;
//設置文本域內容顯示為數字貨幣
js = PdfJavaScript.GetNumberFormatString(2, 0, 0, 0, "$", true);
jsAction = new PdfJavaScriptAction(js);
textbox.Actions.Format = jsAction;
//添加文本域到PDF中,並保存文檔
pdf.Form.Fields.Add(textbox);
//添加文本框，設置文本內容顯示為日期格式
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，設置文本內容顯示為郵政編碼格式
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，設置文本內容顯示為百分數
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，設置數據驗證
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);
//保存文檔
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文檔,並添加空白頁
Dim pdf As New PdfDocument()
Dim page As PdfPageBase = pdf.Pages.Add()
'定義坐標變量
Dim X As Single = 10
Dim Y As Single = 10
Dim width As Single = 100
Dim height As Single = 20
'實例化一個文本域對象，並設置它的位置和邊框樣式
Dim textbox As New PdfTextBoxField(page, "Number-TextBox")
textbox.Bounds = New RectangleF(X, Y, width, height)
textbox.BorderWidth = 0.75F
textbox.BorderStyle = PdfBorderStyle.Solid
'給文本域的鍵盤擊鍵事件設置一個JavaScript動作用於驗證輸入內容是否符合要求
Dim js As String = PdfJavaScript.GetNumberKeystrokeString(2, 0, 0, 0, "$", True)
Dim jsAction As New PdfJavaScriptAction(js)
textbox.Actions.KeyPressed = jsAction
'設置文本域內容顯示為數字貨幣
js = PdfJavaScript.GetNumberFormatString(2, 0, 0, 0, "$", True)
jsAction = New PdfJavaScriptAction(js)
textbox.Actions.Format = jsAction
'添加文本域到PDF中,並保存文檔
pdf.Form.Fields.Add(textbox)
'添加文本框，設置文本內容顯示為日期格式
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，設置文本內容顯示為郵政編碼格式
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，設置文本內容顯示為百分數
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，設置數據驗證
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)
'保存文檔
pdf.SaveToFile("FormatField.pdf", FileFormat.PDF)
End Sub
End Class
End Namespace
設置後的文本框域填寫效果如圖：
以上就是C#設置或驗證PDF文本域格式的方法詳解的詳細內容，更多關於C#設置 驗證PDF文本域格式的資料請關註WalkonNet其它相關文章！
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