[英]How to post a file via HTTP post in vb.net
在vb.net中通过HTTP发布发送文件时遇到问题。 我正在尝试模仿以下HTML,以便vb.net做同样的事情。
<form enctype="multipart/form-data" method="post" action="/cgi-bin/upload.cgi">
File to Upload:
<input type="file" name="filename"/>
<input type="submit" value="Upload" name="Submit"/>
</form>
希望有人能帮忙!
我认为您所要求的是从VB.Net Winforms App将文件发布到Web服务器CGI脚本的能力。
如果是这样,这应该为您工作
Using wc As New System.Net.WebClient()
wc.UploadFile("http://yourserver/cgi-bin/upload.cgi", "c:\test.bin")
End Using
如果UploadFile (如OneShot所说)不起作用,则可以使用HttpWebRequest 。
HttpWebRequest作为凭据等更精细的选项
FileStream rdr = new FileStream(fileToUpload, FileMode.Open);
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(uploadUrl);
req.Method = "PUT"; // you might use "POST"
req.ContentLength = rdr.Length;
req.AllowWriteStreamBuffering = true;
Stream reqStream = req.GetRequestStream();
byte[] inData = new byte[rdr.Length];
// Get data from upload file to inData
int bytesRead = rdr.Read(inData, 0, rdr.Length);
// put data into request stream
reqStream.Write(inData, 0, rdr.Length);
rdr.Close();
req.GetResponse();
// after uploading close stream
reqStream.Close();
使用它可以从HTTP Post获取文件。
Request.Files["File"];
您可以使用
例如:
In ASPX:
<Asp:FileUpload id="flUpload" runat="Server" />
In Code Behind:
if(flUpload.HasFile)
{
string filepath = flUpload.PostedFile.FileName;
flUpload.PostedFile.SaveAs(Server.MapPath(".\\") + file)
}
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