添加表单元素与iTextSharp的表 [英] Adding form elements to a table with iTextSharp
问题描述
我试图创建一个PDF文件,基本上是在一个表格式的用户列表。我需要的表有复选框在里面。到目前为止,我有表和单独的复选框,但我不能找到一种方式来获得该表中的复选框。我想我需要使用AddCell()方法将它们添加
下面是我的代码:
静态无效的主要(字串[] args)
{
//创建文档,文件流,作家
文档的文档=新的文件(PageSize.LETTER);
的FileStream文件=新的FileStream(@C:\Users\test\User List.pdf,FileMode.OpenOrCreate);
PdfWriter作家= PdfWriter.GetInstance(文件,档案);
试
{
//元
doc.AddAuthor(测试用户);
doc.AddCreator(测试文档);
doc.AddKeywords(测试文档);
doc.AddSubject(测试文档);
doc.AddTitle(测试文档 - 测试用户);
//打开PDF文档
doc.Open();
PdfContentByte CB = writer.DirectContent;
字体_bf =新字体(Font.FontFamily.HELVETICA,9);
//创建一个表
PdfPTable表=新PdfPTable(3);
PdfPCell电池=新PdfPCell(新词(用户列表));
PdfFormField场= PdfFormField.CreateCheckBox(作家);
field.SetWidget(新的Rectangle(40,500,60,530),PdfAnnotation.HIGHLIGHT_INVERT);
field.SetFieldFlags(PdfAnnotation.FLAGS_PRINT);
field.FieldName =删除;
writer.AddAnnotation(场);
cell.Colspan = 3;
cell.HorizontalAlignment = 0; // 0 =左侧,1 =中心2 =右
cell.VerticalAlignment = 1;
table.AddCell(无);
table.AddCell(用户);
table.AddCell(删除);
//创建表单域
PdfAppearance [] = ONOFF新PdfAppearance [2];
矩形RECT;
PdfFormField复选框;
RadioCheckField _checkbox;
ONOFF [0] = cb.CreateAppearance(10,10);
ONOFF [0] .Rectangle(1,1,8,8);
ONOFF [0] .Stroke();
ONOFF [1] = cb.CreateAppearance(10,10);
ONOFF [1] .SetRGBColorFill(255,128,128);
ONOFF [1] .Rectangle(1,1,8,8);
ONOFF [1] .FillStroke();
ONOFF [1] .MoveTo(1,1);
ONOFF [1] .LineTo(9,9);
ONOFF [1] .MoveTo(1,9);
ONOFF [1] .LineTo(9,1);
ONOFF [1] .Stroke();
的for(int i = 0;我小于5;我++)
{
table.AddCell(i.ToString());
table.AddCell(用户+ I);
// RECT =新的Rectangle(400,675 - 我* 40,415,663 - 我* 40);
RECT =新的Rectangle(400,735 - 我* 40,415,723 - 我* 40);
_checkbox =新RadioCheckField(作家,矩形,用户+(I + 1),是);
=复选框_checkbox.CheckField;
checkbox.SetAppearance(PdfAnnotation.APPEARANCE_NORMAL,关,开关机[0]);
checkbox.SetAppearance(PdfAnnotation.APPEARANCE_NORMAL,开,开关机[1]);
writer.AddAnnotation(复选框);
//这就是我想加()的复选框表
//我可以添加到AddCell使复选框显示出来?
table.AddCell();
//ColumnText.ShowTextAligned(cb,Element.ALIGN_LEFT,新词(用户+(I + 1),_bf),50,665 - 我* 40,0);
}
CB = writer.DirectContent;
doc.Add(表);
}
赶上(DocumentException DEX)
{
掷(DEX);
}
终于
{
//关闭
doc.Close();
writer.Close();
file.Close();
}
}
有没有办法做到这一点使用iTextSharp的?也许有更好的库使用
我要引用的 iText的网站展示如何将现场传递给定制 IPdfPCellEvent
实施和< A HREF =http://itextpdf.com/examples/iia.php?id=162相对=nofollow>如何创建该自定义类,并在C#下面创建它。
首先,创建一个类的工具在 IPdfPCellEvent
:
<$ p $要添加IPdfPCellEvent {
/ **父其中一个子领域有着领域:p>
公共类ChildFieldEvent。 * /
保护PdfFormField父母;
/ **具有无以复加* /
子字段保护PdfFormField孩子;
/ **单元* /
保护浮填充内部的磁场的填充;
/ **
*创建一个ChildFieldEvent。
*参数父父字段
*参数小子子字段
*参数填充的填充
* /
公共ChildFieldEvent(PdfFormField父母,孩子PdfFormField ,浮填充){
this.parent =父母;
this.kid =孩子;
this.padding =填充;
}
/ **
*的子字段添加到母体,并设置子场的坐标。
* /
公共无效CellLayout(PdfPCell细胞,iTextSharp.text.Rectangle RECT,PdfContentByte [] CB){
parent.AddKid(孩子);
kid.SetWidget(新iTextSharp.text.Rectangle(
rect.GetLeft(填充),
rect.GetBottom(填充),
rect.GetRight(填充),
rect.GetTop(填充)
)
PdfAnnotation.HIGHLIGHT_INVERT
);
}
}
然后,只需设置 CellEvent
上应该有他们的任何领域的细胞。
//文件创建
VAR TESTFILE = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop)的test.pdf);使用
//标准的PDF创建,这里没有什么特别使用
(VAR FS =新的FileStream(TESTFILE,FileMode.Create,FileAccess.Write,FileShare.None)){
(VAR DOC =新的文件()){
使用(VAR作家= PdfWriter.GetInstance(DOC,FS)){
doc.Open();
//创建一个根表单对象,我们将添加孩子来。这样,我们就不必每一个子的注释添加到写入
变种根= PdfFormField.CreateEmpty(作家);
root.FieldName =根;
//创建一个两列的表
变种T =新PdfPTable(2);
//添加一个基本的
t.AddCell(名);
//创建文本框我们,我们正在传递被忽略,没关系
变种TF =新的TextField(作家,新iTextSharp.text.Rectangle(0矩形, 0),直呼其名);
//创建一个新的细胞
细胞VAR =新PdfPCell();
//设置单元格的事件给我们的定制IPdfPCellEvent执行
cell.CellEvent =新ChildFieldEvent(根,tf.GetTextField(),1);
//单元格添加到我们的表
t.AddCell(单元);
//将表添加到文件
doc.Add(T);
//重要!根注解加入也增加了所有孩子的注解
writer.AddAnnotation(root)的作家;
//清理
doc.Close();
}
}
}
I'm trying to create a PDF document that is essentially a list of users in a table format. I need the table to have checkboxes in it. So far, I have the table and the checkboxes separately but I cannot find a way to get the checkboxes in the table. I think I need to add them using the AddCell() method.
Here is my code:
static void Main(string[] args)
{
// create the document, filestream, writer
Document doc = new Document(PageSize.LETTER);
FileStream file = new FileStream(@"C:\Users\test\User List.pdf", FileMode.OpenOrCreate);
PdfWriter writer = PdfWriter.GetInstance(doc, file);
try
{
// metadata
doc.AddAuthor("Test User");
doc.AddCreator("Test Document");
doc.AddKeywords("Test Document");
doc.AddSubject("Test Document");
doc.AddTitle("Test Document - Test User");
// open up the PDF document
doc.Open();
PdfContentByte cb = writer.DirectContent;
Font _bf = new Font(Font.FontFamily.HELVETICA, 9);
// create a table
PdfPTable table = new PdfPTable(3);
PdfPCell cell = new PdfPCell(new Phrase("User List"));
PdfFormField field = PdfFormField.CreateCheckBox(writer);
field.SetWidget(new Rectangle(40, 500, 60, 530), PdfAnnotation.HIGHLIGHT_INVERT);
field.SetFieldFlags(PdfAnnotation.FLAGS_PRINT);
field.FieldName = "Delete";
writer.AddAnnotation(field);
cell.Colspan = 3;
cell.HorizontalAlignment = 0; //0 = left, 1 = center, 2 = right
cell.VerticalAlignment = 1;
table.AddCell("No.");
table.AddCell("Users");
table.AddCell("Delete");
// create form fields
PdfAppearance[] onOff = new PdfAppearance[2];
Rectangle rect;
PdfFormField checkbox;
RadioCheckField _checkbox;
onOff[0] = cb.CreateAppearance(10, 10);
onOff[0].Rectangle(1, 1, 8, 8);
onOff[0].Stroke();
onOff[1] = cb.CreateAppearance(10, 10);
onOff[1].SetRGBColorFill(255, 128, 128);
onOff[1].Rectangle(1, 1, 8, 8);
onOff[1].FillStroke();
onOff[1].MoveTo(1, 1);
onOff[1].LineTo(9, 9);
onOff[1].MoveTo(1, 9);
onOff[1].LineTo(9, 1);
onOff[1].Stroke();
for (int i = 0; i < 5; i++)
{
table.AddCell(i.ToString());
table.AddCell("User " + i);
//rect = new Rectangle(400, 675 - i*40, 415, 663 - i*40);
rect = new Rectangle(400, 735 - i * 40, 415, 723 - i * 40);
_checkbox = new RadioCheckField(writer, rect, "User "+(i+1), "Yes");
checkbox = _checkbox.CheckField;
checkbox.SetAppearance(PdfAnnotation.APPEARANCE_NORMAL, "Off", onOff[0]);
checkbox.SetAppearance(PdfAnnotation.APPEARANCE_NORMAL, "On", onOff[1]);
writer.AddAnnotation(checkbox);
// this is where I am trying to add the checkbox to the table
// what can I add to AddCell() to make the checkbox show up?
table.AddCell();
//ColumnText.ShowTextAligned(cb, Element.ALIGN_LEFT, new Phrase("User " + (i + 1), _bf), 50, 665 - i * 40, 0);
}
cb = writer.DirectContent;
doc.Add(table);
}
catch(DocumentException dex)
{
throw (dex);
}
finally
{
// close
doc.Close();
writer.Close();
file.Close();
}
}
Is there any way to do this using iTextSharp? Maybe there is a better library to use?
I'll reference the iText website showing how to pass a field to a custom IPdfPCellEvent
implementation and how to create that that custom class and recreate it below in C#.
First, create a class the implements the IPdfPCellEvent
:
public class ChildFieldEvent : IPdfPCellEvent {
/** A parent field to which a child field has to be added. */
protected PdfFormField parent;
/** The child field that has to be added */
protected PdfFormField kid;
/** The padding of the field inside the cell */
protected float padding;
/**
* Creates a ChildFieldEvent.
* @param parent the parent field
* @param kid the child field
* @param padding a padding
*/
public ChildFieldEvent(PdfFormField parent, PdfFormField kid, float padding) {
this.parent = parent;
this.kid = kid;
this.padding = padding;
}
/**
* Add the child field to the parent, and sets the coordinates of the child field.
*/
public void CellLayout(PdfPCell cell, iTextSharp.text.Rectangle rect, PdfContentByte[] cb) {
parent.AddKid(kid);
kid.SetWidget(new iTextSharp.text.Rectangle(
rect.GetLeft(padding),
rect.GetBottom(padding),
rect.GetRight(padding),
rect.GetTop(padding)
),
PdfAnnotation.HIGHLIGHT_INVERT
);
}
}
Then just set the CellEvent
on any cells that should have fields in them.
//File to create
var testFile = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "test.pdf");
//Standard PDF creation, nothing special here
using (var fs = new FileStream(testFile, FileMode.Create, FileAccess.Write, FileShare.None)) {
using (var doc = new Document()) {
using (var writer = PdfWriter.GetInstance(doc, fs)) {
doc.Open();
//Create a root form object that we'll add "children" to. This way we don't have to add each "child" annotation to the writer
var root = PdfFormField.CreateEmpty(writer);
root.FieldName = "root";
//Create a two column table
var t = new PdfPTable(2);
//Add a basic cell
t.AddCell("First Name");
//Create our textfield, the rectangle that we're passing in is ignored and doesn't matter
var tf = new TextField(writer, new iTextSharp.text.Rectangle(0, 0), "first-name");
//Create a new cell
var cell = new PdfPCell();
//Set the cell event to our custom IPdfPCellEvent implementation
cell.CellEvent = new ChildFieldEvent(root, tf.GetTextField(), 1);
//Add the cell to our table
t.AddCell(cell);
//Add the table to the document
doc.Add(t);
//IMPORTANT! Add the root annotation to the writer which also adds all of the child annotations
writer.AddAnnotation(root);
//Clean up
doc.Close();
}
}
}
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