我有一个ASCX控件，它显示标签云（使用数据列表的红色和绿色标签）。有没有办法将此数据列表导出为PDF文件，同时保留标签大小及其颜色？谢谢你的帮助
答案 0 :(得分：1)
使用.NET库的PDF库。最好的例子可能是iText。 本书iText in Action非常值得投资，可以让您快速启动并运行iText .NET API。
除了ASCX / HTML版本之外，还要创建标签云的PDF版本，而不是尝试将HTML片段转换为PDF。
答案 1 :(得分：0)
Response.ContentType = "application/pdf";
Response.AddHeader("content-disposition", "attachment;filename=GridViewExport.pdf");
Response.Cache.SetCacheability(HttpCacheability.NoCache);
StringWriter sw = new StringWriter();
HtmlTextWriter hw = new HtmlTextWriter(sw);
datalist1.RenderControl(hw);
StringReader sr = new StringReader(sw.ToString());
Document pdfDoc = new Document(PageSize.A4, 10f, 10f, 10f, 0f);
HTMLWorker htmlparser = new HTMLWorker(pdfDoc);
PdfWriter.GetInstance(pdfDoc, Response.OutputStream);
pdfDoc.Open();
htmlparser.Parse(sr);
pdfDoc.Close();
Response.Write(pdfDoc);
Response.End();
答案 2 :(得分：0)
protected void GenerateReport(object sender, EventArgs e)
{
DataRow dr = GetData("SELECT * FROM Employees where EmployeeId = " + ddlEmployees.SelectedItem.Value).Rows[0]; ;
Document document = new Document(PageSize.A4, 88f, 88f, 10f, 10f);
Font NormalFont = FontFactory.GetFont("Arial", 12, Font.NORMAL, Color.BLACK);
using (System.IO.MemoryStream memoryStream = new System.IO.MemoryStream())
{
PdfWriter writer = PdfWriter.GetInstance(document, memoryStream);
Phrase phrase = null;
PdfPCell cell = null;
PdfPTable table = null;
Color color = null;
document.Open();
//Header Table
table = new PdfPTable(2);
table.TotalWidth = 500f;
table.LockedWidth = true;
table.SetWidths(new float[] { 0.3f, 0.7f });
//Company Logo
cell = ImageCell("~/images/northwindlogo.gif", 30f, PdfPCell.ALIGN_CENTER);
table.AddCell(cell);
//Company Name and Address
phrase = new Phrase();
phrase.Add(new Chunk("Microsoft Northwind Traders Company\n\n", FontFactory.GetFont("Arial", 16, Font.BOLD, Color.RED)));
phrase.Add(new Chunk("107, Park site,\n", FontFactory.GetFont("Arial", 8, Font.NORMAL, Color.BLACK)));
phrase.Add(new Chunk("Salt Lake Road,\n", FontFactory.GetFont("Arial", 8, Font.NORMAL, Color.BLACK)));
phrase.Add(new Chunk("Seattle, USA", FontFactory.GetFont("Arial", 8, Font.NORMAL, Color.BLACK)));
cell = PhraseCell(phrase, PdfPCell.ALIGN_LEFT);
cell.VerticalAlignment = PdfCell.ALIGN_TOP;
table.AddCell(cell);
//Separater Line
color = new Color(System.Drawing.ColorTranslator.FromHtml("#A9A9A9"));
DrawLine(writer, 25f, document.Top - 79f, document.PageSize.Width - 25f, document.Top - 79f, color);
DrawLine(writer, 25f, document.Top - 80f, document.PageSize.Width - 25f, document.Top - 80f, color);
document.Add(table);
table = new PdfPTable(2);
table.HorizontalAlignment = Element.ALIGN_LEFT;
table.SetWidths(new float[] { 0.3f, 1f });
table.SpacingBefore = 20f;
//Employee Details
cell = PhraseCell(new Phrase("Employee Record", FontFactory.GetFont("Arial", 12, Font.UNDERLINE, Color.BLACK)), PdfPCell.ALIGN_CENTER);
cell.Colspan = 2;
table.AddCell(cell);
cell = PhraseCell(new Phrase(), PdfPCell.ALIGN_CENTER);
cell.Colspan = 2;
cell.PaddingBottom = 30f;
table.AddCell(cell);
//Photo
cell = ImageCell(string.Format("~/photos/{0}.jpg", dr["EmployeeId"]), 25f, PdfPCell.ALIGN_CENTER);
table.AddCell(cell);
//Name
phrase = new Phrase();
phrase.Add(new Chunk(dr["TitleOfCourtesy"] + " " + dr["FirstName"] + " " + dr["LastName"] + "\n", FontFactory.GetFont("Arial", 10, Font.BOLD, Color.BLACK)));
phrase.Add(new Chunk("(" + dr["Title"].ToString() + ")", FontFactory.GetFont("Arial", 8, Font.BOLD, Color.BLACK)));
cell = PhraseCell(phrase, PdfPCell.ALIGN_LEFT);
cell.VerticalAlignment = PdfPCell.ALIGN_MIDDLE;
table.AddCell(cell);
document.Add(table);
DrawLine(writer, 160f, 80f, 160f, 690f, Color.BLACK);
DrawLine(writer, 115f, document.Top - 200f, document.PageSize.Width - 100f, document.Top - 200f, Color.BLACK);
table = new PdfPTable(2);
table.SetWidths(new float[] { 0.5f, 2f });
table.TotalWidth = 340f;
table.LockedWidth = true;
table.SpacingBefore = 20f;
table.HorizontalAlignment = Element.ALIGN_RIGHT;
//Employee Id
table.AddCell(PhraseCell(new Phrase("Employee code:", FontFactory.GetFont("Arial", 8, Font.BOLD, Color.BLACK)), PdfPCell.ALIGN_LEFT));
table.AddCell(PhraseCell(new Phrase("000" + dr["EmployeeId"], FontFactory.GetFont("Arial", 8, Font.NORMAL, Color.BLACK)), PdfPCell.ALIGN_LEFT));
cell = PhraseCell(new Phrase(), PdfPCell.ALIGN_CENTER);
cell.Colspan = 2;
cell.PaddingBottom = 10f;
table.AddCell(cell);
//Address
table.AddCell(PhraseCell(new Phrase("Address:", FontFactory.GetFont("Arial", 8, Font.BOLD, Color.BLACK)), PdfPCell.ALIGN_LEFT));
phrase = new Phrase(new Chunk(dr["Address"] + "\n", FontFactory.GetFont("Arial", 8, Font.NORMAL, Color.BLACK)));
phrase.Add(new Chunk(dr["City"] + "\n", FontFactory.GetFont("Arial", 8, Font.NORMAL, Color.BLACK)));
phrase.Add(new Chunk(dr["Region"] + " " + dr["Country"] + " " + dr["PostalCode"], FontFactory.GetFont("Arial", 8, Font.NORMAL, Color.BLACK)));
table.AddCell(PhraseCell(phrase, PdfPCell.ALIGN_LEFT));
cell = PhraseCell(new Phrase(), PdfPCell.ALIGN_CENTER);
cell.Colspan = 2;
cell.PaddingBottom = 10f;
table.AddCell(cell);
//Date of Birth
table.AddCell(PhraseCell(new Phrase("Date of Birth:", FontFactory.GetFont("Arial", 8, Font.BOLD, Color.BLACK)), PdfPCell.ALIGN_LEFT));
table.AddCell(PhraseCell(new Phrase(Convert.ToDateTime(dr["BirthDate"]).ToString("dd MMMM, yyyy"), FontFactory.GetFont("Arial", 8, Font.NORMAL, Color.BLACK)), PdfPCell.ALIGN_LEFT));
cell = PhraseCell(new Phrase(), PdfPCell.ALIGN_CENTER);
cell.Colspan = 2;
cell.PaddingBottom = 10f;
table.AddCell(cell);
//Phone
table.AddCell(PhraseCell(new Phrase("Phone Number:", FontFactory.GetFont("Arial", 8, Font.BOLD, Color.BLACK)), PdfPCell.ALIGN_LEFT));
table.AddCell(PhraseCell(new Phrase(dr["HomePhone"] + " Ext: " + dr["Extension"], FontFactory.GetFont("Arial", 8, Font.NORMAL, Color.BLACK)), PdfPCell.ALIGN_LEFT));
cell = PhraseCell(new Phrase(), PdfPCell.ALIGN_CENTER);
cell.Colspan = 2;
cell.PaddingBottom = 10f;
table.AddCell(cell);
//Addtional Information
table.AddCell(PhraseCell(new Phrase("Addtional Information:", FontFactory.GetFont("Arial", 8, Font.BOLD, Color.BLACK)), PdfPCell.ALIGN_LEFT));
table.AddCell(PhraseCell(new Phrase(dr["Notes"].ToString(), FontFactory.GetFont("Arial", 8, Font.NORMAL, Color.BLACK)), PdfPCell.ALIGN_JUSTIFIED));
document.Add(table);
document.Close();
byte[] bytes = memoryStream.ToArray();
memoryStream.Close();
Response.Clear();
Response.ContentType = "application/pdf";
Response.AddHeader("Content-Disposition", "attachment; filename=Employee.pdf");
Response.ContentType = "application/pdf";
Response.Buffer = true;
Response.Cache.SetCacheability(HttpCacheability.NoCache);
Response.BinaryWrite(bytes);
Response.End();
Response.Close();
}
}
private static void DrawLine(PdfWriter writer, float x1, float y1, float x2, float y2, Color color)
{
PdfContentByte contentByte = writer.DirectContent;
contentByte.SetColorStroke(color);
contentByte.MoveTo(x1, y1);
contentByte.LineTo(x2, y2);
contentByte.Stroke();
}
private static PdfPCell PhraseCell(Phrase phrase, int align)
{
PdfPCell cell = new PdfPCell(phrase);
cell.BorderColor = Color.WHITE;
cell.VerticalAlignment = PdfCell.ALIGN_TOP;
cell.HorizontalAlignment = align;
cell.PaddingBottom = 2f;
cell.PaddingTop = 0f;
return cell;
}
private static PdfPCell ImageCell(string path, float scale, int align)
{
iTextSharp.text.Image image = iTextSharp.text.Image.GetInstance(HttpContext.Current.Server.MapPath(path));
image.ScalePercent(scale);
PdfPCell cell = new PdfPCell(image);
cell.BorderColor = Color.WHITE;
cell.VerticalAlignment = PdfCell.ALIGN_TOP;
cell.HorizontalAlignment = align;
cell.PaddingBottom = 0f;
cell.PaddingTop = 0f;
return cell;
}