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我有一个 pdf 模板，我想为数据库中的每条记录生成。我找到了这个，但它只适用于物理文件。如何使这项工作仅在内存中起作用？我尝试使用 memorystream，但我无法使用 PdfReader 阅读此内容

    using iTextSharp.text.pdf;
using System;
using System.IO;

public partial class Default2 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        string uniqueidstr = Guid.NewGuid().ToString();

        string file = Server.MapPath("~/Reports/PrimaVisita.pdf");

        string MasterPdfFile = Server.MapPath("./MstrCopyFile" + uniqueidstr + ".pdf").ToString();

        PdfCopyFields copy = new PdfCopyFields(new FileStream(MasterPdfFile, FileMode.CreateNew));

        for (int i = 0; i < 10; i++)
        {
            PdfReader tmpReader = new PdfReader(file);
            string tmpfilepath = Server.MapPath("./tmpFile" + uniqueidstr + i.ToString() + ".pdf").ToString();

            FileStream tmpOutFileStream = new FileStream(tmpfilepath, FileMode.CreateNew);
            PdfStamper tmpOutStamper = new PdfStamper(tmpReader, tmpOutFileStream);
            AcroFields fields = tmpOutStamper.AcroFields;
            fields.SetField("Cognome", "pippo" + i.ToString());
            fields.SetField("Nome", "pluto" + i.ToString());
            fields.SetField("DatiNascita", "paperino" + i.ToString());
            fields.SetField("Residenza", "topolino" + i.ToString());

            tmpOutStamper.Writer.CloseStream = false;
            tmpOutStamper.FormFlattening = true;
            tmpOutStamper.Close();
            tmpOutFileStream.Close();

            PdfReader nwPgReader = new PdfReader(tmpfilepath);

            copy.AddDocument(nwPgReader);
        }

        copy.Close();
    }
}

错误是“找不到 PDF 标头签名”。这是代码

protected void Button1_Click(object sender, EventArgs e)
    {
        string uniqueidstr = Guid.NewGuid().ToString();

        string file = Server.MapPath("~/Reports/PrimaVisita.pdf");

        MemoryStream masterStream = new MemoryStream();
        //string MasterPdfFile = Server.MapPath("./MstrCopyFile" + uniqueidstr + ".pdf").ToString();

        PdfCopyFields copy = new PdfCopyFields(masterStream);

        for (int i = 0; i < 10; i++)
        {
            PdfReader tmpReader = new PdfReader(file);
            string tmpfilepath = Server.MapPath("./tmpFile" + uniqueidstr + i.ToString() + ".pdf").ToString();
            MemoryStream tmpStream = new MemoryStream();

            //FileStream tmpOutFileStream = new FileStream(tmpfilepath, FileMode.CreateNew);
            PdfStamper tmpOutStamper = new PdfStamper(tmpReader, tmpStream);
            AcroFields fields = tmpOutStamper.AcroFields;
            fields.SetField("Cognome", "pippo" + i.ToString());
            fields.SetField("Nome", "pluto" + i.ToString());
            fields.SetField("DatiNascita", "paperino" + i.ToString());
            fields.SetField("Residenza", "topolino" + i.ToString());

            tmpOutStamper.Writer.CloseStream = false;
            tmpOutStamper.FormFlattening = true;
            tmpOutStamper.Close();
            //tmpOutFileStream.Close();

            PdfReader nwPgReader = new PdfReader(tmpStream);

            copy.AddDocument(nwPgReader);
        }

        copy.Close();
    }
4

1 回答 1

1

我通过将内存流转换为字节数组来解决，现在它可以工作了。

坦克为您的支持

布鲁诺

protected void Button1_Click(object sender, EventArgs e)
    {
        string uniqueidstr = Guid.NewGuid().ToString();

        string file = Server.MapPath("~/Reports/PrimaVisita.pdf");

        MemoryStream masterStream = new MemoryStream();

        PdfCopyFields copy = new PdfCopyFields(masterStream);

        for (int i = 0; i < 10; i++)
        {
            PdfReader tmpReader = new PdfReader(file);
            MemoryStream tmpStream = new MemoryStream();
            tmpStream.Position = 0;

            PdfStamper tmpOutStamper = new PdfStamper(tmpReader, tmpStream);
            AcroFields fields = tmpOutStamper.AcroFields;
            fields.SetField("Cognome", "pippo" + i.ToString());
            fields.SetField("Nome", "pluto" + i.ToString());
            fields.SetField("DatiNascita", "paperino" + i.ToString());
            fields.SetField("Residenza", "topolino" + i.ToString());

            tmpOutStamper.Writer.CloseStream = false;
            tmpOutStamper.FormFlattening = true;
            tmpOutStamper.Close();
            byte[] buf = tmpStream.ToArray();

            PdfReader nwPgReader = new PdfReader(buf);

            copy.AddDocument(nwPgReader);
        }

        copy.Close();


}
于 2013-04-23T03:23:36.877 回答