我有以下问题:当我下载xlsx或docx文件时,下载的文件损坏。其他类型的文件(例如PDF)工作正常。我还测试了不同的MIME类型(应用程序/vnd. ms-excel或应用程序/vnd. openxmlformats-officedocument. spreadsheetml. sheet或应用程序/octet-stream)。
protected void btnActionDocAnsehen_Click(object sender, CommandEventArgs e)
{
string connectionString = ConfigurationManager.ConnectionStrings["dataConnection"].ToString();
SqlConnection conn = new SqlConnection(connectionString);
conn.Open();
//New Code for Downloading file
string filepath = pfad;
#endregion
#region [Datenabruf mit WebDAV]
//Create a stream for the file
Stream stream = null;
//This controls how many bytes to read at a time and send to the client
int bytesToRead = 10000;
// Buffer to read bytes in chunk size specified above
byte[] buffer = new Byte[bytesToRead];
try
{
// --------------- COPY REQUEST --------------- //
// Create an HTTP request for the URL.
HttpWebRequest httpCopyRequest =
(HttpWebRequest)WebRequest.Create(filepath);
httpCopyRequest.Timeout = 3000;
// Pre-authenticate the request.
httpCopyRequest.PreAuthenticate = true;
//Create a response for this request
HttpWebResponse httpCopyResponse = (HttpWebResponse)httpCopyRequest.GetResponse();
if (httpCopyRequest.ContentLength > 0)
httpCopyResponse.ContentLength = httpCopyRequest.ContentLength;
//Get the Stream returned from the response
stream = httpCopyResponse.GetResponseStream();
// prepare the response to the client. resp is the client Response
var resp = HttpContext.Current.Response;
//Indicate the type of data being sent
resp.ContentType = ReturnFiletype(Path.GetExtension(filepath));
//Name the file
resp.AddHeader("Content-Disposition", "attachment; filename=\"" + pfad + "\"");
int length;
do
{
// Verify that the client is connected.
if (resp.IsClientConnected)
{
// Read data into the buffer.
length = stream.Read(buffer, 0, bytesToRead);
// and write it out to the response's output stream
resp.OutputStream.Write(buffer, 0, length);
// Flush the data
resp.Flush();
//Clear the buffer
buffer = new Byte[bytesToRead];
}
else
{
// cancel the download if client has disconnected
length = -1;
}
} while (length > 0); //Repeat until no data is read
}
catch (WebException ex)
{
string message = "Die Datei konnte auf dem Server nicht gefunden werden! Bitte kontaktieren Sie die Administration!";
//string message = filepath;
ClientScript.RegisterStartupScript(GetType(), "alert", "alert('" + message + "');", true);
}
finally
{
if (stream != null)
{
//Close the input stream
stream.Close();
}
}
#endregion
}
1条答案
按热度按时间pnwntuvh1#
如果你不结束你的HttpContext.Current.Response,它会将页面添加到(文件)OutputStream的底部。
用文本编辑器(记事本)检查你的文件,你可能会在底部看到这样的东西:
我猜它与pdf的工作,因为可能你的PdfReader忽略任何不正确的格式,或一些标签后。
只需在循环后添加resp.End(),如下所示