如何删除多个上传的文件？
我在网络表单中使用3个文件上传控件，
在这里我给它截图。
这是我的aspx.cs文件代码，
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using BusinessLayer;
using System.IO;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
namespace EventManagerApp.SuperAdmin
{
public partial class Settings : System.Web.UI.Page
{
public string FilePath;
protected void Page_Load(object sender, EventArgs e)
{
}
protected void btnSubmit_Click(object sender, EventArgs e)
{
General_SettingsBL gb = new General_SettingsBL();
gb.Privacy_Policies = System.IO.Path.GetExtension(fuprivacypolicies.FileName);
gb.Privacy_Policies = System.IO.Path.GetExtension(fuprivacypolicies.FileName);
gb.Refund_Policies = System.IO.Path.GetExtension(furefundpolicies.FileName);
gb.Terms = System.IO.Path.GetExtension(futerms.FileName);
gb.Trial_Period = decimal.Parse(txttrailperoid.Text);
gb.Insert();
lblmsg.Visible = true;
lblmsg.Text = "Records Inserted Successfully";
}
protected void btnCancel_Click(object sender, EventArgs e)
{
}
protected void deleterefundpolicies(object sender, EventArgs e)
{
furefundpolicies.ID = null;
protected void deleteprivacypolicies(object sender, EventArgs e)
{
fuprivacypolicies.ID = null;
// fuprivacypolicies = new FileUpload();
}
protected void deleteterms(object sender, EventArgs e)
{
futerms.ID = null;
// futerms = new FileUpload();
}
}
}
我将此代码用于.aspx文件，
<%@ Page Title="" Language="C#" MasterPageFile="~/SuperAdmin/EventManager_SuperAdmin.Master" AutoEventWireup="false" CodeBehind="Settings.aspx.cs" Inherits="EventManagerApp.SuperAdmin.Settings" %>
<%@ Register TagPrefix="asp" Namespace="AjaxControlToolkit" Assembly="AjaxControlToolkit" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">
<div class="container">
<div class="row">
<h3>
Settings</h3>
<hr>
</div>
<div class="row">
<div class="col-md-6">
<form class="form-horizontal" role="form">
<div class="form-group">
<label for="inputEmail1" class="col-md-4 control-label">
Refund Policies: </label>
<div class="col-md-6">
<asp:FileUpload ID="furefundpolicies" runat="server" />
</div>
<div class="col-md-6">
<asp:Button ID="btnrefunfpolicy" runat="server" Text="DELETE" class="btn btn-default" OnClick="deleterefundpolicies" />
</div>
</div>
<div class="form-group">
<label for="inputEmail1" class="col-md-4 control-label">
Privacy Policies</label>
<div class="col-md-6">
<asp:FileUpload ID="fuprivacypolicies" runat="server" />
</div>
<div class="col-md-6">
<asp:Button ID="btnprivacypolicy" runat="server" Text="DELETE" class="btn btn-default" OnClick="deleteprivacypolicies" />
</div>
</div>
<div class="form-group">
<label for="inputEmail1" class="col-md-4 control-label">
Terms</label>
<div class="col-md-6">
<asp:FileUpload ID="futerms" runat="server" />
</div>
<div class="col-md-6">
<asp:Button ID="btnterms" runat="server" Text="DELETE" class="btn btn-default" OnClick="deleteterms" />
</div>
</div>
<div class="form-group">
<label for="inputEmail1" class="col-md-4 control-label">
Trial Period</label>
<div class="col-md-6">
<asp:TextBox ID="txttrailperoid" runat="server" class="form-control"></asp:TextBox>
<%-- <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="txttrailperoid"
Display="Dynamic" ErrorMessage="Please Enter Value"></asp:RequiredFieldValidator>--%>
</div>
</div>
<div class="col-md-10">
<asp:Label ID="lblmsg" runat="server" Visible="false" class="alert alert-success form-group"></asp:Label>
</div>
<div class="form-group">
<label for="inputEmail1" class="col-md-4 control-label">
</label>
<div class="col-md-6">
<asp:Button ID="btnSubmit" runat="server" Text="SAVE" class="btn btn-default" OnClick="btnSubmit_Click" />
<asp:Button ID="btnCancel" runat="server" Text="CANCEL" CausesValidation="false"
class="btn btn-default" OnClick="btnCancel_Click" />
</div>
</div>
</form>
</div>
</div>
</div>
</asp:Content>
在我的截图中我描述了我的问题，我只想删除一个上传的文件。
1 个答案:
答案 0 :(得分：1)
看，你的代码并没有保存所有这三个文件！您只保存其中一个并删除它（或不删除）！ 正如我所承诺的那样，如果这对您有所帮助，我想向您展示另一种方法。
你走了： - 我在你的aspx中添加了三个标签 - 删除代码隐藏文件中的注释，以执行您的gb操作...
<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server"><div class="container">
<div class="row">
<h3>
Settings</h3>
<hr>
</div>
<div class="row">
<div class="col-md-6">
<form class="form-horizontal" role="form">
<div class="form-group">
<label for="inputEmail1" class="col-md-4 control-label">
Refund Policies: </label>
<div class="col-md-6">
<asp:FileUpload ID="furefundpolicies" runat="server" />
</div>
<div class="col-md-6">
<asp:Label ID="Label1" runat="server" Text="No file yet, Please Click Upload before using DELETE button"></asp:Label><br />
<asp:Button ID="btnrefunfpolicy" runat="server" Text="DELETE" class="btn btn-default" OnClick="deleterefundpolicies" />
</div>
</div>
<div class="form-group">
<label for="inputEmail1" class="col-md-4 control-label">
Privacy Policies</label>
<div class="col-md-6">
<asp:FileUpload ID="fuprivacypolicies" runat="server" />
</div>
<div class="col-md-6">
<asp:Label ID="Label2" runat="server" Text="No file yet, Please Click Upload before using DELETE button"></asp:Label><br />
<asp:Button ID="btnprivacypolicy" runat="server" Text="DELETE" class="btn btn-default" OnClick="deleteprivacypolicies" />
</div>
</div>
<div class="form-group">
<label for="inputEmail1" class="col-md-4 control-label">
Terms</label>
<div class="col-md-6">
<asp:FileUpload ID="futerms" runat="server" />
</div>
<div class="col-md-6">
<asp:Label ID="Label3" runat="server" Text="No file yet, Please Click Upload before using DELETE button"></asp:Label><br />
<asp:Button ID="btnterms" runat="server" Text="DELETE" class="btn btn-default" OnClick="deleteterms" />
</div>
</div>
<div class="form-group">
<label for="inputEmail1" class="col-md-4 control-label">
Trial Period</label>
<div class="col-md-6">
<asp:TextBox ID="txttrailperoid" runat="server" class="form-control"></asp:TextBox>
<%-- <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="txttrailperoid"
Display="Dynamic" ErrorMessage="Please Enter Value"></asp:RequiredFieldValidator>--%>
</div>
</div>
<div class="col-md-10">
<asp:Label ID="lblmsg" runat="server" Visible="false" class="alert alert-success form-group"></asp:Label>
</div>
<div class="form-group">
<label for="inputEmail1" class="col-md-4 control-label">
</label>
<div class="col-md-6">
<asp:Button ID="btnSubmit" runat="server" Text="SAVE" class="btn btn-default" OnClick="btnSubmit_Click" />
<asp:Button ID="btnCancel" runat="server" Text="CANCEL" CausesValidation="false"
class="btn btn-default" OnClick="btnCancel_Click" />
</div>
</div>
</form>
</div>
</div>
</div>
现在你的代码已经落后了
public string FilePath;
protected void Page_Load(object sender, EventArgs e)
{
}
protected void btnSubmit_Click(object sender, EventArgs e)
{
//General_SettingsBL gb = new General_SettingsBL();
string fn = Path.GetFileName(fuprivacypolicies.PostedFile.FileName);
string SaveLocation = Server.MapPath("UploadedCSVFiles") + "\\" + fn;
FileInfo fi = new FileInfo(SaveLocation);
fuprivacypolicies.PostedFile.SaveAs(SaveLocation);
fuprivacypolicies.PostedFile.InputStream.Dispose();
Session["fuprivacypoliciesPath"] = SaveLocation;
Label2.Text = "Uploaded file : "+fn;
// gb.Privacy_Policies = System.IO.Path.GetExtension(fuprivacypolicies.FileName);
// gb.Privacy_Policies = System.IO.Path.GetExtension(fuprivacypolicies.FileName);
// gb.Refund_Policies = System.IO.Path.GetExtension(furefundpolicies.FileName);
// gb.Terms = System.IO.Path.GetExtension(futerms.FileName);
// gb.Trial_Period = decimal.Parse(txttrailperoid.Text);
// gb.Insert();
lblmsg.Visible = true;
lblmsg.Text = "Records Inserted Successfully";
Label1.Text = "Uploaded file : " + fn;
string ff = Path.GetFileName(furefundpolicies.PostedFile.FileName);
string SaveLocation2 = Server.MapPath("UploadedCSVFiles") + "\\" + ff;
furefundpolicies.PostedFile.SaveAs(SaveLocation2);
furefundpolicies.PostedFile.InputStream.Dispose();
Session["furefundpoliciesPath"] = SaveLocation2;
Label2.Text = "Uploaded file : " + ff;
string ft = Path.GetFileName(futerms.PostedFile.FileName);
string SaveLocation3 = Server.MapPath("UploadedCSVFiles") + "\\" + ft;
futerms.PostedFile.SaveAs(SaveLocation3);
futerms.PostedFile.InputStream.Dispose();
Session["futermsPath"] = SaveLocation3;
Label3.Text = "Uploaded file : " + ft;
}
protected void btnCancel_Click(object sender, EventArgs e)
{
}
protected void deleterefundpolicies(object sender, EventArgs e)
{
//string fn = Path.GetFileName(fuprivacypolicies.PostedFile.FileName);
//string SaveLocation = Server.MapPath("UploadedCSVFiles") + "\\" + fn;
//FileInfo fi = new FileInfo(SaveLocation);
////furefundpolicies.ID = null;
//fi.Delete();
if (Session["furefundpoliciesPath"] != null && File.Exists(Session["furefundpoliciesPath"].ToString()))
{
File.Delete(Session["furefundpoliciesPath"].ToString());
Label1.Text = "File deleted";
}
}
protected void deleteprivacypolicies(object sender, EventArgs e)
{
//fuprivacypolicies.ID = null;
// fuprivacypolicies = new FileUpload();
if (Session["fuprivacypoliciesPath"]!=null&&File.Exists(Session["fuprivacypoliciesPath"].ToString())) {
File.Delete(Session["fuprivacypoliciesPath"].ToString());
Label2.Text = "File deleted";
}
}
protected void deleteterms(object sender, EventArgs e)
{
//futerms.ID = null;
// futerms = new FileUpload();
if (Session["futermsPath"]!=null&&File.Exists(Session["futermsPath"].ToString()))
{
File.Delete(Session["futermsPath"].ToString());
Label3.Text = "File deleted";
}
}
有了这个，根据点击的按钮分别删除文件！试一试
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