ASP.NET实现推送文件到浏览器的方法


            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();

}







希望本文所述对大家的asp.net程序设计有所帮助。