asp.net利用一般处理程序下载和在线查看文档

传输文件路径给一般处理程序

protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)

{

if (e.CommandArgument != null

&& Utility.IsNumber(e.CommandArgument.ToString()))

{

// 获取操作的文档的id

int id = Convert.ToInt32(e.CommandArgument);

switch (e.CommandName)

{

case "btnDownLoad":

Response.Redirect("../Tool/Download.ashx?path="

+ "\\Docs\\" + PassageListBLL.GetPassageListByID(id).Title);

break;

}

}

}



下载

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using Tool;

namespace FullTextSearchDemo.Ajax

{

/// <summary>

/// Download 的摘要说明

/// </summary>

public class Download : IHttpHandler

{

public void ProcessRequest(HttpContext context)

{

try

{

if (context.Request.QueryString["path"] != null

&& context.Request.QueryString["path"].ToString().Trim() != "")

{

string path = context.Request.QueryString["path"].ToString();

System.IO.FileInfo file

= new System.IO.FileInfo

(System.Web.HttpContext.Current.Server.MapPath(path));

context.Response.Clear();

context.Response.Charset = "GB2312";

context.Response.ContentEncoding = System.Text.Encoding.UTF8;

// 添加头信息，为"文件下载/另存为"对话框指定默认文件名,

设定编码为UTF8,防止中文文件名出现乱码

context.Response.AddHeader

("Content-Disposition",

"attachment; filename="

+ System.Web.HttpUtility.UrlEncode(file.Name, System.Text.Encoding.UTF8));

// 添加头信息，指定文件大小，让浏览器能够显示下载进度

context.Response.AddHeader("Content-Length", file.Length.ToString());

//// 指定返回的是一个不能被客户端读取的流，必须被下载

//context.Response.ContentType = "application/ms-excel";

// 把文件流发送到客户端

context.Response.WriteFile(file.FullName);

// 停止页面的执行

context.Response.End();

}

else

{

JScript.Alert("您下载的资源不存在！");

}

}

catch

{

JScript.Alert("您下载的操作有误,请重新再试！");

}

}

public bool IsReusable

{

get

{

return false;

}

}

}

}



在线查看

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using Tool;

namespace FullTextSearchDemo.Ajax

{

/// <summary>

/// Download 的摘要说明

/// </summary>

public class Download : IHttpHandler

{

public void ProcessRequest(HttpContext context)

{

try

{

if (context.Request.QueryString["path"] != null

&& context.Request.QueryString["path"].ToString().Trim() != "")

{

string path = context.Request.QueryString["path"].ToString();

System.IO.FileInfo file

= new System.IO.FileInfo

(System.Web.HttpContext.Current.Server.MapPath(path));

context.Response.Clear();

context.Response.Charset = "GB2312";

context.Response.ContentEncoding = System.Text.Encoding.UTF8;

// 添加头信息，为"文件下载/另存为"对话框指定默认文件名,

设定编码为UTF8,防止中文文件名出现乱码

context.Response.AddHeader

("Content-Disposition",

"online; filename="

+ System.Web.HttpUtility.UrlEncode(file.Name, System.Text.Encoding.UTF8));

// 添加头信息，指定文件大小，让浏览器能够显示下载进度

context.Response.AddHeader("Content-Length", file.Length.ToString());

//// 指定返回的是一个不能被客户端读取的流，必须被下载

//context.Response.ContentType = "application/ms-excel";

// 把文件流发送到客户端

context.Response.WriteFile(file.FullName);

// 停止页面的执行

context.Response.End();

}

else

{

JScript.Alert("您下载的资源不存在！");

}

}

catch

{

JScript.Alert("您下载的操作有误,请重新再试！");

}

}

public bool IsReusable

{

get

{

return false;

}

}

}

}