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。