C# 使用iText7和ASP.NET C在PDF文件的页脚中添加页码#
我可以使用iText7和C#ASP.NET创建pdf文件 此pdf文件共包含9页 我试图在代码中添加总页数和一条虚线 但我有两个问题C# 使用iText7和ASP.NET C在PDF文件的页脚中添加页码#,c#,asp.net,itext7,C#,Asp.net,Itext7,我可以使用iText7和C#ASP.NET创建pdf文件 此pdf文件共包含9页 我试图在代码中添加总页数和一条虚线 但我有两个问题 页数(第1页,共9页,第2页,第3页,共9页…)仅显示在PDF文件的第8页和第9页中 虚线没有显示在第一页 任何帮助都将不胜感激。。。多谢各位 下面是我的代码 private void mtpdfnew() { DataTable dt = new DataTable(); filename = @"C:\inetpub\wwwroot
private void mtpdfnew()
{
DataTable dt = new DataTable();
filename = @"C:\inetpub\wwwroot\public\pdf\" +
DateTime.Now.ToString("yyyyMMddHHmmss") + ".pdf";
PdfWriter writer = new PdfWriter(filename);
PdfDocument pdf = new PdfDocument(writer);
Document document = new Document(pdf);
using (MySqlConnection myConnectionString =
new MySqlConnection(ConfigurationManager.ConnectionStrings["cn"].ConnectionString))
{
using (MySqlCommand cmd =
new MySqlCommand("SP", myConnectionString))
{
cmd.Connection.Open();
cmd.CommandType = CommandType.StoredProcedure;
using (MySqlDataAdapter da =
new MySqlDataAdapter(cmd))
{
da.Fill(dt);
if (dt.Rows.Count > 0)
{
for (int i = 0; i < dt.Rows.Count; i++)
{
contents = new Paragraph(dt.Rows[i]["contents"].ToString())
.SetTextAlignment(TextAlignment.JUSTIFIED)
.SetFontSize(12);
if (dt.Rows[i]["contents"].ToString().StartsWith("Set") && i != 0)
{
document.Add(new AreaBreak(AreaBreakType.NEXT_PAGE));
document.Add(new LineSeparator(new DottedLine(1, 2)).SetMarginTop(4));
}
List<IElement> lst = HtmlConverter.ConvertToElements(dt.Rows[i]["contents"].ToString()).ToList();
for (int j = 0; j < lst.Count; j++)
{
IBlockElement element = (IBlockElement)lst[j];
if (dt.Rows[i]["contents"].ToString().StartsWith("Set"))
{
contents.SetFontSize(12)
.SetBold()
.SetFontColor(ColorConstants.BLUE);
}
else if (dt.Rows[i]["contents"].ToString().StartsWith("- "))
{
contents.SetFontSize(10)
.SetBold()
.SetFontColor(ColorConstants.BLACK);
}
else
{
contents.SetTextAlignment(TextAlignment.JUSTIFIED_ALL)
.SetFontSize(10)
.SetFontColor(ColorConstants.BLACK);
}
element.SetProperty(Property.LEADING, new Leading(Leading.MULTIPLIED, -1f));
document.Add(element);
}
}
Footer footerHandler = new Footer();
pdf.AddEventHandler(PdfDocumentEvent.END_PAGE, footerHandler);
footerHandler.WriteTotal(pdf);
dest = filename.ToString();
document.Close();
}
Response.Clear();
Response.ContentType = "application/pdf";
Response.AppendHeader("Content-Disposition", "attachment; filename=" + dest);
Response.TransmitFile(dest);
Response.End();
}
}
}
}
private class TableFooterEventHandler : IEventHandler
{
private Table table;
public TableFooterEventHandler(Table table)
{
this.table = table;
}
public void HandleEvent(Event currentEvent)
{
PdfDocumentEvent docEvent = (PdfDocumentEvent)currentEvent;
PdfDocument pdfDoc = docEvent.GetDocument();
PdfPage page = docEvent.GetPage();
int pageNumber = pdfDoc.GetPageNumber(page);
Rectangle pageSize = page.GetPageSize();
PdfCanvas canvas = new PdfCanvas(page.NewContentStreamBefore(), page.GetResources(), pdfDoc);
new Canvas(canvas, new Rectangle(36, 20, page.GetPageSize().GetWidth() - 72, 50))
.Add(table)
.Close();
}
}
protected class Footer : IEventHandler
{
protected PdfFormXObject placeholder;
protected float side = 20;
protected float x = 300;
protected float y = 25;
protected float space = 4.5f;
protected float descent = 3;
public Footer()
{
placeholder = new PdfFormXObject(new Rectangle(0, 0, side, side));
}
public virtual void HandleEvent(Event @event)
{
PdfDocumentEvent docEvent = (PdfDocumentEvent)@event;
PdfDocument pdf = docEvent.GetDocument();
PdfPage page = docEvent.GetPage();
int pageNumber = pdf.GetPageNumber(page);
Rectangle pageSize = page.GetPageSize();
PdfCanvas pdfCanvas = new PdfCanvas(page);
Canvas canvas = new Canvas(pdfCanvas, pageSize);
canvas.SetFontSize(10);
Paragraph p = new Paragraph()
.Add("Page ")
.Add(pageNumber.ToString())
.Add(" of");
canvas.ShowTextAligned(p, x, y, TextAlignment.RIGHT);
canvas.Close();
pdfCanvas.AddXObjectAt(placeholder, x + space, y - descent);
pdfCanvas.Release();
}
public void WriteTotal(PdfDocument pdfDoc)
{
Canvas canvas = new Canvas(placeholder, pdfDoc);
canvas.SetFontSize(10);
canvas.ShowTextAligned(pdfDoc.GetNumberOfPages().ToString(),
0, descent, TextAlignment.LEFT);
canvas.Close();
}
}
private class TableHeaderEventHandler : IEventHandler
{
private Table table;
private float tableHeight;
private Document doc;
public TableHeaderEventHandler(Document doc)
{
this.doc = doc;
InitTable();
TableRenderer renderer = (TableRenderer)table.CreateRendererSubTree();
renderer.SetParent(new DocumentRenderer(doc));
LayoutResult result = renderer.Layout(new LayoutContext(new LayoutArea(0, PageSize.A4)));
tableHeight = result.GetOccupiedArea().GetBBox().GetHeight();
}
public void HandleEvent(Event currentEvent)
{
PdfDocumentEvent docEvent = (PdfDocumentEvent)currentEvent;
PdfDocument pdfDoc = docEvent.GetDocument();
PdfPage page = docEvent.GetPage();
int pageNum = docEvent.GetDocument().GetPageNumber(page);
PdfCanvas canvas = new PdfCanvas(page.NewContentStreamBefore(), page.GetResources(), pdfDoc);
PageSize pageSize = pdfDoc.GetDefaultPageSize();
float coordX = pageSize.GetX() + doc.GetLeftMargin();
float coordY = pageSize.GetTop() - doc.GetTopMargin();
float width = pageSize.GetWidth() - doc.GetRightMargin() - doc.GetLeftMargin();
float height = GetTableHeight();
Rectangle rect = new Rectangle(coordX, coordY, width, height);
new Canvas(canvas, rect)
.Add(table)
.Close();
}
public float GetTableHeight()
{
return tableHeight;
}
private void InitTable()
{
}
}
private void mtpdfnew()
{
DataTable dt=新的DataTable();
文件名=@“C:\inetpub\wwwroot\public\pdf\”+
DateTime.Now.ToString(“yyyyMMddHHmmss”)+“.pdf”;
PdfWriter writer=新的PdfWriter(文件名);
PdfDocument pdf=新PdfDocument(编写器);
文件=新文件(pdf);
使用(MySqlConnection)myConnectionString=
新的MySqlConnection(ConfigurationManager.ConnectionString[“cn”].ConnectionString))
{
使用(mysqlcmd)命令=
新的MySqlCommand(“SP”,myConnectionString))
{
cmd.Connection.Open();
cmd.CommandType=CommandType.storedProcess;
使用(MySqlDataAdapter)=
新的MySqlDataAdapter(cmd))
{
da.填充(dt);
如果(dt.Rows.Count>0)
{
对于(int i=0;i