加载PDF文档时出错-iTextSharp PDF

本文关键字：PDF -iTextSharp 出错 文档 加载 | 更新日期: 2023-09-27 18:28:57

我在ASP.NET C#中使用iTextSharp生成了一个PDF文件。

我试图为几个元素生成一个标题+表格。在每个元素之后，我想开始一个新的页面。我用doc.NewPage()这样做，但当我生成PDF文件时，打开文件时会出现以下错误：

加载PDF文档时出错

当我试图在最新版本的谷歌Chrome中打开PDF文件时，我会遇到这个错误。当我尝试在Adobe Reader中打开文件时，我会收到以下错误消息：

打开此文档时出错。文件已损坏，无法修复。

PDF文件的大小也只有1kb。。。

以下是我如何生成文件的代码：

//Create a byte array that will eventually hold our final PDF
//must be outside of the foreach loop (and everything else), because we store every single generated table in here for the final pdf!!
Byte[] bytes;
List<TableObject> myTables = getTables();
TableObject currentTable = new TableObject();
//Boilerplate iTextSharp setup here
//Create a stream that we can write to, in this case a MemoryStream
using (MemoryStream ms = new MemoryStream())
{
    //Create an iTextSharp Document which is an abstraction of a PDF but **NOT** a PDF
    using (Document doc = new Document(PageSize.A4, 10f, 10f, 10f, 0f))
    {
        //Create a writer that's bound to our PDF abstraction and our stream
        PdfWriter writer = PdfWriter.GetInstance(doc, ms);
        //Open the document for writing
        doc.Open();
        //writer.CloseStream = false;
        //loop all tableobjects inside the document & the instance of PDFWriter itself! 
        foreach (TableObject to in myTables.ToList())
        {
            //Get the data from database corresponding to the current tableobject and fill all the stuff we need!
            DataTable dt = getDTFromID(to._tableID);
            Object[] genObjects = new Object[5];
            genObjects = gen.generateTable(dt, currentTable._tableName, currentTable._tableID.ToString(), currentTable, true);
            StringBuilder sb = (StringBuilder)genObjects[1];
            String tableName = sb.ToString();
            Table myGenTable = (Table)genObjects[0];
            //String table contains a valid html string, which works in the generate function for a single page document
            String table = genObjects[2].ToString();
            using (StringReader srHtml = new StringReader(table))
            {
                //Parse the HTML
                iTextSharp.tool.xml.XMLWorkerHelper.GetInstance().ParseXHtml(writer, doc, srHtml);
            }
            //this will probably render a whole new page at the end of the file!! need to be fixed later!!!
            //doc.NewPage();
        }
        //After all of the PDF "stuff" above is done and closed but **before** we
        //close the MemoryStream, grab all of the active bytes from the stream
        bytes = ms.ToArray();
        doc.Close();
    } 
}
//Now we just need to do something with those bytes.
Response.ContentType = "application/pdf";
Response.AppendHeader("Content-Disposition", "attachment; filename=ShiftReport_complete.pdf");
Response.BinaryWrite(bytes);

如何解决这个问题，以便在打开PDF文件时消除错误消息？

加载PDF文档时出错-iTextSharp PDF

您的代码完成创建PDF，如下所示：

    bytes = ms.ToArray();
    doc.Close();

这是错误的顺序！在doc.Close()期间，将编写挂起的PDF对象和PDF尾部。当您在此之前获取byte[]时，您的结果PDF缺少这些部分。

只需换一种方式：

    doc.Close();
    bytes = ms.ToArray();
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