Visual C# .NET Code Sample:
System.IO.Strea m iStream = null;
// Buffer to read 10K bytes in chunk:
byte[] buffer = new Byte[10000];
// Length of the file:
int length;
// Total bytes to read:
long dataToRead;
// Identify the file to download including its path.
string filepath = "DownloadFileNa me";
// Identify the file name.
string filename = System.IO.Path. GetFileName(fil epath);
try
{
// Open the file.
iStream = new System.IO.FileS tream(filepath, System.IO.FileM ode.Open,
System.IO.FileA ccess.Read,Syst em.IO.FileShare .Read);
// Total bytes to read:
dataToRead = iStream.Length;
Response.Conten tType = "applicatio n/octet-stream";
Response.AddHea der("Content-Disposition", "attachment ; filename=" +
filename);
// Read the bytes.
while (dataToRead > 0)
{
// Verify that the client is connected.
if (Response.IsCli entConnected)
{
// Read the data in buffer.
length = iStream.Read(bu ffer, 0, 10000);
// Write the data to the current output stream.
Response.Output Stream.Write(bu ffer, 0, length);
// Flush the data to the HTML output.
Response.Flush( );
buffer= new Byte[10000];
dataToRead = dataToRead - length;
}
else
{
//prevent infinite loop if user disconnects
dataToRead = -1;
}
}
}
catch (Exception ex)
{
// Trap the error, if any.
Response.Write( "Error : " + ex.Message);
}
finally
{
if (iStream != null)
{
//Close the file.
iStream.Close() ;
}
}
Replace DownloadFileNam e with the name of a file .
"Yuriy" <yl******@hotma il.com> дÈëÓʼþ
news:0f******** *************** *****@phx.gbl.. .
I have a .NET server button on a form. When the user
clicks it, I'd like to (behind the scenes) create a pdf
file containing the data that they're currently viewing,
then somehow activate the "Do you want to download or
save this file?" dialog.
The pdf file I'm already creating. That's no big deal.
But now, how do I make this newly-created file available
for the user to download? Can I activate that dialog
somehow? I'd like to do this in one single click of
this .NET button (System.Web.UI. WebControls.But ton).
Thanks.
