本文实例讲述了ASP.NET实现推送文件到浏览器的方法。分享给大家供大家参考。具体分析如下：

这里主要实现从服务器到浏览器，推送文件，提供用户下载/浏览的功能。

提示： 在AJAX UpdatePanel里面将无效。如果代码从按钮单击事件中被调用，该按钮需要在 AJAX UpdatePanel的外部。

具体代码如下：

/// <summary> 
/// Downloads (pushes) file to the client browser.  
/// **** NOTE **** Cannot be done from inside an AJAX UpdatePanel control. 
/// </summary> 
/// <param name="fullFilePath">The full file path of the file</param>
 protected void DownloadFile(string fullFilePath) { 
  // Gets the File Name 
  string fileName = fullFilePath.Substring(fullFilePath.LastIndexOf('\\') + 1); 
  byte[] buffer;
   using (FileStream fileStream = new FileStream(fullFilePath, FileMode.Open)) 
  {
     int fileSize = (int)fileStream.Length; 
    buffer = new byte[fileSize]; 
    // Read file into buffer
     fileStream.Read(buffer, 0, (int)fileSize); 
  } 
  Response.Clear(); 
  Response.Buffer = true;
   Response.BufferOutput = true;
   Response.ContentType = "application/x-download";   
Response.AddHeader("Content-Disposition", "attachment; filename=" + fileName); 
  Response.CacheControl = "public"; 
  // writes buffer to OutputStream
   Response.OutputStream.Write(buffer, 0, buffer.Length); 
  Response.End(); 
}