多页PDF无法在iPad上打开

时间:2014-11-13 18:06:38

标签: c# ios ipad pdf

我正在处理一个项目,我正在从PSR文件生成PDF文件。如果PDF文件只有一个页面,但是如果它有两个以上的PSR文件而我生成了两个文件则无法在iPad上打开,并且在桌面上正常工作。

我在这里使用的第三个库工具是'dbatuotrack',我正在使用C#。

有人可以指导我如何解决这个问题吗?

谢谢, S上。

        foreach (var pdfform in pdfPagesID)
        {
            //dbAutoTrack.PDFWriter.Document objDoc = null;
            //dbAutoTrack.PDFWriter.Page objPage = null;

            objDoc = new dbAutoTrack.PDFWriter.Document();


            pdfPagesID.Clear();
            pdfPagesID = GetSpecPageID(pdfform);

            if (pdfPagesID.Count > 1)
            {
                foreach (var pdfPage in pdfPagesID)
                {
                    dbAutoTrack.PDFWriter.Page objPage2 = null;
                    var lastItem = pdfPagesID.Last();
                    prefixPageID = prefixSpecPageID(pdfPage);
                    suffixPageIDPSR = prefixPageID + ".psr";
                    if (File.Exists(PSRPath + suffixPageIDPSR))
                    {
                        objDs = new CDatasheet(this.PSRPath + suffixPageIDPSR, false);
                        objDs.pdfDbHelper = pdfhelper;
                        //Giving the specformId as SpecFornName
                       pdfFormName = "Form" + pdfform + ".pdf";
                        if (!(pdfPage == pdfPagesID.First()))
                        {

                            objPage2 = objDs.Generate_PDFReport();
                            objDoc.Pages.Add(objPage2);
                        }
                        else
                        {
                            objPage = objDs.Generate_PDFReport();
                            objDoc.Pages.Add(objPage);
                        }
                        if (objPage != null)
                        {
                            if (pdfWithNotePage == true && pdfPage.Equals(lastItem))
                            {
                                objNotePage = objDs.GetNotePage();
                                objDoc.Pages.Add(objPage);
                                objDoc.Pages.Add(objNotePage);

                            }
                            else
                            {

                                //objDoc.Pages.Add(objPage);
                                //objDoc.Pages.Add(objPage2);
                            }
                            fsOutput = new FileStream(TemplatePath + pdfFormName, FileMode.Create, FileAccess.Write);
                            objDoc.Generate(fsOutput);


                        }
                        if (fsOutput != null)
                        {
                            fsOutput.Close();
                            fsOutput.Dispose();
                            fsOutput = null;
                        }
                    }

                }
                objDoc = null;
                objPage = null;
            }

1 个答案:

答案 0 :(得分:1)

这是我如何调整代码以使其工作。感谢DJ KRAZE

的建议
    foreach (var pdfform in pdfPagesID)
    {
        //dbAutoTrack.PDFWriter.Document objDoc = null;
        //dbAutoTrack.PDFWriter.Page objPage = null;

        objDoc = new dbAutoTrack.PDFWriter.Document();


        pdfPagesID.Clear();
        pdfPagesID = GetSpecPageID(pdfform);

        if (pdfPagesID.Count > 1)
        {
            foreach (var pdfPage in pdfPagesID)
            {
                dbAutoTrack.PDFWriter.Page objPage2 = null;
                var lastItem = pdfPagesID.Last();
                prefixPageID = prefixSpecPageID(pdfPage);
                suffixPageIDPSR = prefixPageID + ".psr";
                if (File.Exists(PSRPath + suffixPageIDPSR))
                {
                    objDs = new CDatasheet(this.PSRPath + suffixPageIDPSR, false);
                    objDs.pdfDbHelper = pdfhelper;
                    //Giving the specformId as SpecFornName
                   pdfFormName = "Form" + pdfform + ".pdf";
                    if (!(pdfPage == pdfPagesID.First()))
                    {

                        objPage2 = objDs.Generate_PDFReport();
                        objDoc.Pages.Add(objPage2);
                    }
                    else
                    {
                        objPage = objDs.Generate_PDFReport();
                        objDoc.Pages.Add(objPage);
                    }
                    if (objPage != null)
                    {
                        if (pdfWithNotePage == true && pdfPage.Equals(lastItem))
                        {
                            objNotePage = objDs.GetNotePage();
                            objDoc.Pages.Add(objPage);
                            objDoc.Pages.Add(objNotePage);

                        }
                        else
                        {

                            //objDoc.Pages.Add(objPage);
                            //objDoc.Pages.Add(objPage2);
                        }
     }
    }
    }
                        fsOutput = new FileStream(TemplatePath + pdfFormName, FileMode.Create, FileAccess.Write);
                        objDoc.Generate(fsOutput);


                     //This region was the problem, disposing the output everytime.
                //Needed it to be included after completion of iteration
                    if (fsOutput != null)
                    {
                        fsOutput.Close();
                        fsOutput.Dispose();
                        fsOutput = null;
                    }
                 }