以编程方式下载pdf [英] Download pdf programatically

问题描述

如何使用vb.net或c＃？下载pdf并存储到磁盘？

How can I download a pdf and store to disk using vb.net or c#?

该URL（pdf）在最终版本之前进行了一些修改

The url (of the pdf) has some rediection going on before the final pdf is reached.

我尝试下面，但当我尝试在本地打开时，pdf似乎已损坏，

I tried the below but the pdf seems corrupted when I attempt to open locally,

Dim PdfFile As FileStream = File.OpenWrite(saveTo)
Dim PdfStream As MemoryStream = GetFileStream(pdfURL)
PdfStream.WriteTo(PdfFile)
PdfStream.Flush()
PdfStream.Close()
PdfFile.Flush()
PdfFile.Close()

非常感谢，

KS

推荐答案

p>您可以尝试使用WebClient（System.Net命名空间）类来执行此操作，以避免任何流在您身边工作。

You can try to use the WebClient (System.Net namespace) class to do this which will avoid any stream work on your side.

以下C＃代码抓取IRS表单并将其保存到C：\Temp.pdf。

The following C# code grabs an IRS form and saves it to C:\Temp.pdf.

using(WebClient client = new WebClient())
{
    client.DownloadFile("http://www.irs.gov/pub/irs-pdf/fw4.pdf", @"C:\Temp.pdf");
}

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