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

问题描述

如何使用vb.NET或C#下载PDF并将其存储到磁盘?

How can I download a PDF and store to disk using vb.NET or C#?

在到达最终PDF之前，(PDF的)URL进行了一些重新设计.

The URL (of the PDF) has some rediection going on before the final PDF is reached.

我尝试了以下操作，但是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()

推荐答案

您可以尝试使用WebClient(System.Net命名空间)类来执行此操作，这将避免任何流工作.

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#代码获取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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