C# Doc.Delete方法代码示例

        protected Doc ItemAnalysisToPdfDoc(PdfRenderSettings settings = null)
        {
            if (settings == null) settings = new PdfRenderSettings();

            StringWriter sw = new StringWriter();
            HtmlTextWriter w = new HtmlTextWriter(sw);
            reportHeaderDiv.Controls.Add(LoadPDFHeaderInfo());
            barGraphLevelsContainerDiv.Controls.Add(LoadBarGraphLevels());
            barGraphPDFContainerDiv.Controls.Add(LoadBarGraphs());
            contentDiv.RenderControl(w);
            string result_html = sw.GetStringBuilder().ToString();

            int topOffset = settings.HeaderHeight > 0 ? settings.HeaderHeight : 0;
            int bottomOffset = settings.FooterHeight > 0 ? settings.FooterHeight : 0;

            Doc doc = new Doc();
            doc.HtmlOptions.HideBackground = true;
            doc.HtmlOptions.PageCacheEnabled = false;
            doc.HtmlOptions.UseScript = true;
            doc.HtmlOptions.Timeout = 36000;
            doc.HtmlOptions.BreakZoneSize = 100;    // I experiemented with this being 99% instead of 100%, but you end up with passages getting cut off in unflattering ways. This may lead to more blank space... but I think it's the lessor of evils
            doc.HtmlOptions.ImageQuality = 70;

            doc.MediaBox.String = "0 0 " + settings.PageWidth + " " + settings.PageHeight;
            doc.Rect.String = settings.LeftMargin + " " + (0 + bottomOffset).ToString() + " " + (settings.PageWidth - settings.RightMargin).ToString() + " " + (settings.PageHeight - topOffset).ToString();
            doc.HtmlOptions.AddTags = true;
            doc.SetInfo(0, "ApplyOnLoadScriptOnceOnly", "1");

            List<int> forms = new List<int>();

            int theID = doc.AddImageHtml(result_html);

            while (true)
            {
                if (!doc.Chainable(theID))
                    break;
                doc.Page = doc.AddPage();
                theID = doc.AddImageToChain(theID);
                string[] tagIds = doc.HtmlOptions.GetTagIDs(theID);
                if (tagIds.Length > 0 && tagIds[0] == "test_header")
                    forms.Add(doc.PageNumber);					// By using GetTagIDs to find if a test header ended up on this page, we can determine whether the page needs a header

                if (settings.PossibleForcedBreaks)
                {		// only want to take the performance hit if there's a change we're forcing breaks
                    if (String.IsNullOrEmpty(doc.GetText("Text")))
                    {		// WSH Found situation where after I added page break always for multi-form, one test that was already breaking properly, added an extra page that was blank between forms. Almost like some amount of HTML had been put there, even though it wasn't any real text. By checking to make sure there is some actual text on page, we can avoid that problem
                        doc.Delete(doc.Page);
                    }
                }
            }

            if (settings.HeaderHeight > 0 && !String.IsNullOrEmpty(settings.HeaderText))
            {
                /*HttpServerUtility Server = HttpContext.Current.Server;
                headerText = Server.HtmlDecode(headerText);*/
                Doc headerDoc = new Doc();

                headerDoc.MediaBox.String = settings.LeftMargin + " " + (settings.PageHeight - settings.HeaderHeight).ToString() + " " + (settings.PageWidth - settings.RightMargin).ToString() + " " + settings.PageHeight;	//LEFT, BOTTOM,WIDTH, HEIGHT
                headerDoc.Rect.String = settings.LeftMargin + " " + (settings.PageHeight - settings.HeaderHeight).ToString() + " " + (settings.PageWidth - settings.RightMargin).ToString() + " " + settings.PageHeight;	//LEFT, BOTTOM,WIDTH, HEIGHT
                headerDoc.VPos = 0.5;
                int headerID = headerDoc.AddImageHtml(settings.HeaderText);

                if (!String.IsNullOrEmpty(settings.HeaderText))
                {
                    int form_ref = 0;
                    for (int i = 1; i <= doc.PageCount; i++)
                    {
                        if (form_ref < forms.Count && forms[form_ref] == i)
                        {
                            form_ref++;
                        }
                        else
                        {
                            if (i > 1 || settings.ShowHeaderOnFirstPage)
                            {
                                doc.PageNumber = i;
                                doc.Rect.String = settings.LeftMargin + " " + (settings.PageHeight - settings.HeaderHeight).ToString() + " " + (settings.PageWidth - settings.RightMargin).ToString() + " " + settings.PageHeight;	//LEFT, BOTTOM,WIDTH, HEIGHT
                                doc.VPos = 0.5;

                                theID = doc.AddImageDoc(headerDoc, 1, null);
                                theID = doc.AddImageToChain(theID);
                            }
                        }
                    }
                }
            }

            for (int i = 1; i <= doc.PageCount; i++)
            {
                doc.PageNumber = i;
                doc.Flatten();
            }
            return doc;
        }

        //Method to remove blank pages from the pdf
        protected void RemoveBlankPages(Doc pdf)
        {
            for (int i = pdf.PageCount; i > 0; i--)
            {
                pdf.PageNumber = i;

                //get the pdf content
                string textContent = pdf.GetText("Text");

                //delete the page if it is blank
                if (string.IsNullOrEmpty(textContent))
                { pdf.Delete(pdf.Page); }
            }
        }