在内存流中另存为pdf [英] Save as pdf in memorystream

问题描述

我正在使用itextsharp将段落保存到内存流中，因为pdf

但是我不工作原因？

i am using itextsharp to save a paragraph in to the memorystream as pdf
but i dont work why?

     private void buttonSkrivUt_Click(object sender, EventArgs e)
        {

            using (MemoryStream ms = new MemoryStream())
            {

                Document document = new Document(PageSize.A4, 25, 25, 30, 30);
;
                PdfWriter writer = PdfWriter.GetInstance(document, ms);

                document.Open();
             
                document.Add(new Paragraph("hej"));

                document.Close();

                writer.Close();
            
             
            }

            
        }

这个仅作品。



>

This works only.

>

                Document document = new Document(PageSize.A4, 25, 25, 30, 30);
;
                PdfWriter writer = PdfWriter.GetInstance(document, new FileStream("test.pdf", FileMode.Create));
                //PdfWriter writer = PdfWriter.GetInstance(document, ms);

                document.Open();
             
                document.Add(new Paragraph("hej"));

                document.Close();

                writer.Close();

推荐答案

使用MemoryStream时需要返回一些内容。执行此操作的最佳方法是返回一个数组。这样你就得到了字节[]

You need to return something to work with when using MemoryStream. The best way to do this is to return an array. This way you get the byte[]

using (MemoryStream ms = new MemoryStream())
{
    Document document = new Document(PageSize.A4, 25, 25, 30, 30);
    PdfWriter writer = PdfWriter.GetInstance(document, ms);
    document.Open();
    document.Add(new Paragraph("hej"));
    document.Close();
    writer.Close();

    return ms.ToArray();
}

PS我不是故意听起来你不知道区别

PS I did not mean to sound like you did not know the difference

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