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asp.net 文件下载功能函数代码整理

转载 作者:qq735679552 更新时间:2022-09-29 22:32:09 26 4
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代码如下

public void FileDownLoadDel(string fullFilename)  {  System.IO.Stream 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 = fullFilename;  filepath = Server.MapPath(filepath);  // Identify the file name.  string filename = System.IO.Path.GetFileName(filepath);  try  {  // Open the file.  iStream = new System.IO.FileStream(filepath, System.IO.FileMode.Open,  System.IO.FileAccess.Read, System.IO.FileShare.Read);  // Total bytes to read:  dataToRead = iStream.Length;  Response.ContentType = "application/octet-stream";  Response.AddHeader("Content-Disposition", "attachment; filename=" + filename);  // Read the bytes.  while (dataToRead > 0)  {  // Verify that the client is connected.  if (Response.IsClientConnected)  {  // Read the data in buffer.  length = iStream.Read(buffer, 0, 10000);  // Write the data to the current output stream.  Response.OutputStream.Write(buffer, 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;  Response.Clear();  }  }  Response.End(); //没有这句会将该页面刷新后的内容追加写入文件中。  }  catch (Exception ex)  {  // Trap the error, if any.  //Response.Write("Error : " + ex.Message);  //base.WriteLog("资料", "下载资料:" + ex.Message + "!", LogType.Error, this.GetType().ToString());  }  finally  {  if (iStream != null)  {  //Close the file.  iStream.Close();  }  File.Delete(fullFilename);  }  }  。

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