asp.net利用一般处理程序下载和在线查看文档-优快云博客

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=" + "<a href="file://Docs//">\\Docs\\</a>" + 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;

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));

}

}