我上傳的文件,並存儲在數據文件夾中的服務器如何使用asp.net下載pdf文件?
文件路徑:
Project Name
|_bin
|_css
|_Data
|_Mohamedfaisal.pdf
這是我的asp.net代碼
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.IO;
using System.Data;
namespace Expatriates {
public partial class FileUploadForm: System.Web.UI.Page {
protected void Page_Load(object sender, EventArgs e) {
}
protected void Button1_Click(object sender, EventArgs e) {
if (FileUpload1.HasFile) {
FileUpload1.PostedFile.SaveAs(Server.MapPath("~/Data/") + FileUpload1.FileName);
}
DataTable dt = new DataTable();
dt.Columns.Add("File", typeof(string));
dt.Columns.Add("size", typeof(string));
dt.Columns.Add("type", typeof(string));
foreach(string strFile in Directory.GetFiles(Server.MapPath("~/Data/"))) {
FileInfo fi = new FileInfo(strFile);
dt.Rows.Add(fi.Name, fi.Length, fi.Extension);
}
GridView1.DataSource = dt;
GridView1.DataBind();
}
protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e) {
if (e.CommandName == "Download") {
Response.Clear();
Response.Write(e.CommandArgument);
Response.ContentType = "application/octect-stream";
Response.AppendHeader("content-disposition", "filename=" + e.CommandArgument);
Response.TransmitFile(Server.MapPath("~/Data/") + e.CommandArgument); // error occured
Response.End();
}
}
}
}
前端asp.net
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="FileUploadForm.aspx.cs" Inherits="Expatriates.FileUploadForm" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div style="font-family:Arial;">
<asp:FileUpload ID="FileUpload1" runat="server" />
<asp:Button ID="Button1" runat="server" Text="Upload" OnClick="Button1_Click" />
<br />
<br />
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" OnRowCommand="GridView1_RowCommand">
<Columns>
<asp:TemplateField HeaderText="File">
<ItemTemplate>
<asp:LinkButton ID="LinkButton1" runat="server" CommandName="Download" Text='<%# Eval("File") %>'></asp:LinkButton>
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="Size" HeaderText="Size in Bytes" />
<asp:BoundField DataField="Type" HeaderText="File Type" />
</Columns>
</asp:GridView>
</div>
</form>
</body>
</html>
我的前端設計 UI design
,當我點擊鏈接它表明以下錯誤消息
型「System.IO.DirectoryNotFoundException」的例外在mscorlib.dll發生 但在用戶代碼中沒有處理
附加信息:無法找到路徑'F:\ Visual Studio Project \ Expatriates \ Expatriates \ Data \'的一部分。
上傳文件工作正常,但我沒有得到下載。
用'Path.Combine嘗試(System.Web.HttpContext.Current.Server.MapPath( 「〜/數據/」)); ' –
您是否調試過並檢查e.CommandArgument中的文件名是否存在? – sachin
@sachin:你是對的。它沒有文件名。現在問題修復了。謝謝 –