本文介绍了Asp.Net不仅在客户端创建文本文件,还删除它的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
按下按钮时,我必须在客户端上创建一个文本文件,打开它然后将其删除。我可以创建并打开/下载它:
When pressing a button I have to create on client a text file, open it and then delete it. I can create and open/download it with:
protected void btNotepadPending_Click(object sender, EventArgs e)
{
string sFileName = System.IO.Path.GetRandomFileName();
try
{
String testo = "XXX" + Environment.NewLine;
int iii = 0;
foreach (var item in lUserPending)
testo += ++iii + " - " + item.Item1 + " " + item.Item2;
//Create and populate a memorystream
MemoryStream mstream = GetTextAsStream(testo);
//Convert the memorystream to an array of bytes.
byte[] byteArray = mstream.ToArray();
//Clean up the memory stream
mstream.Flush();
mstream.Close();
// Clear all content output from the buffer stream
Response.Clear();
// Add a HTTP header to the output stream that specifies the default filename
// for the browser's download dialog
Response.AddHeader("Content-Disposition", "attachment; filename=delenda.txt");
// Add a HTTP header to the output stream that contains the
// content length(File Size). This lets the browser know how much data is being transfered
Response.AddHeader("Content-Length", byteArray.Length.ToString());
// Set the HTTP MIME type of the output stream
Response.ContentType = "application/octet-stream";
// Write the data out to the client.
Response.BinaryWrite(byteArray);
Response.Flush();
Response.Close();
}
catch (Exception exc)
{
MessageBox.SendErrorEmail("Exception: " + exc);
}
}
private MemoryStream GetTextAsStream(String text)
{
//Create the return memorystream object
MemoryStream ReturnStream = new MemoryStream();
//Create a streamwriter to write to the memory stream
StreamWriter WriteStream = new StreamWriter(ReturnStream);
//Write the text in the textbox to the Memory Stream.
WriteStream.WriteLine(text);
//Clean up the stream writer
WriteStream.Flush();
WriteStream.Close();
//Return the memory Stream
return ReturnStream;
}
但如何删除它?我试图在退出时删除
but how to delete it? I tried to put a delete when exiting on
protected override void OnUnload(EventArgs e)
{
if (IsPostBack)
{
if (File.Exists("delenda.txt"))
File.Delete("delenda.txt");
}
}
但它从未停止过。那么现在我怎么能在记事本(或任何其他相关程序关闭?)
but it never stopped here. So how can I now when notepad (or any other associated program is closed?)
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