[英]Download .xls file from a url
I'm trying to download an xls file from a url: http://www.site.com/ff/excel/file.aspx?deven=0 我正在尝试从网址下载xls文件: http : //www.site.com/ff/excel/file.aspx? deven =0
I'm using this code but when the download is complete the file is not properly downloaded. 我正在使用此代码,但是下载完成后,文件没有正确下载。 How can I download this file correctly?
如何正确下载此文件?
string remoteFilename="http://www.site.com/ff/excel/file.aspx?deven=0";
string localFilename = "D:\\1\\1.xls";
Stream remoteStream = null;
Stream localStream = null;
WebResponse response = null;
try
{
// Create a request for the specified remote file name
WebRequest request = WebRequest.Create(remoteFilename);
if (request != null)
{
// Send the request to the server and retrieve the
// WebResponse object
response = request.GetResponse();
response.ContentType = "application/vnd.ms-excel";
if (response != null)
{
// Once the WebResponse object has been retrieved,
// get the stream object associated with the response's data
remoteStream = response.GetResponseStream();
// Create the local file
localStream = File.Create(localFilename);
// Allocate a 1k buffer
byte[] buffer = new byte[1024];
int bytesRead;
// Simple do/while loop to read from stream until
// no bytes are returned
do
{
// Read data (up to 1k) from the stream
bytesRead = remoteStream.Read(buffer, 0, buffer.Length);
// Write the data to the local file
localStream.Write(buffer, 0, bytesRead);
// Increment total bytes processed
} while (bytesRead > 0);
}
}
}
catch (Exception e)
{
MessageBox.Show(e.Message);
}
finally
{
// Close the response and streams objects here
// to make sure they're closed even if an exception
// is thrown at some point
if (response != null) response.Close();
if (remoteStream != null) remoteStream.Close();
if (localStream != null) localStream.Close();
}
MessageBox.Show("file downl");
Try flushing with localStream.Flush()
AFTER your do {} while()
, you might also want to wrap with a using
statement. 尝试在
do {} while()
localStream.Flush()
之后使用localStream.Flush()
刷新,您可能还希望using
语句进行包装。
For example: 例如:
// Create the local file
using (localStream = File.Create(localFilename)) {
// Allocate a 1k buffer
byte[] buffer = new byte[1024];
int bytesRead;
// Simple do/while loop to read from stream until
// no bytes are returned
do {
// Read data (up to 1k) from the stream
bytesRead = remoteStream.Read(buffer, 0, buffer.Length);
// Write the data to the local file
localStream.Write(buffer, 0, bytesRead);
// Increment total bytes processed
} while (bytesRead > 0);
localStream.Flush();
}
This is how I download Excel files using a FilePathResult. 这就是我使用FilePathResult下载Excel文件的方式。
public FilePathResult DownloadFile(int ID)
{
var log = _db.Logs.FirstOrDefault(x => x.LogID == ID);
//Download the spreadsheet
string fileName = string.Format("{0}.xlsx", ID);
string path = _directory + "\\" + fileName;
return File(path, "application/vnd.ms-excel", string.Format("{0}.xlsx", log.ReportTitle));
}
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