未能映射路径“/files/”

[丨端木]

文件错误如下所示，想做一个文件上传功能，这个功能模块是从另一个功能模块拷贝过来的，另一个功能模块能运行正常，不知道这个功能模块有哪写地方有问题。

说明: 执行当前 Web 请求期间，出现未经处理的异常。请检查堆栈跟踪信息，以了解有关该错误以及代码中导致错误的出处的详细信息。

异常详细信息: System.InvalidOperationException: 未能映射路径“/files/”。

源错误:

行 45:                     string ty = File2.PostedFile.ContentType;
行 46:                    
行 47:                         File2.PostedFile.SaveAs(System.Web.HttpContext.Current.Server.MapPath(Pa) + ss);
行 48:                         s =  ss;
行 49:                         return "3"; 

源文件: f:\net计算机精品课程网站\YcCourseWeb\App_Code\upload.cs 行: 47

堆栈跟踪:
[InvalidOperationException: 未能映射路径“/files/”。]
System.Web.Hosting.HostingEnvironment.MapPathActual(VirtualPath virtualPath, Boolean permitNull) +9781465
System.Web.Hosting.HostingEnvironment.MapPathInternal(VirtualPath virtualPath) +39
System.Web.VirtualPath.MapPathInternal() +4
System.Web.HttpRequest.MapPath(VirtualPath virtualPath, VirtualPath baseVirtualDir, Boolean allowCrossAppMapping) +110
System.Web.HttpServerUtility.MapPath(String path) +104
upload.Up(HtmlInputFile File2, String Pa) in f:\net计算机精品课程网站\YcCourseWeb\App_Code\upload.cs:47
Admin_AddFile.Button1_Click(Object sender, EventArgs e) in f:\net计算机精品课程网站\YcCourseWeb\AddHomework.aspx.cs:26
System.Web.UI.WebControls.Button.OnClick(EventArgs e) +9628614
System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +103
System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +10
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13
System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +35
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1724

文件源代码如下所示：

upload.cs：

using System;
using System.IO;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
/// <summary>
/// upload 的摘要说明
/// </summary>
public class upload
{
	public upload()
	{
		//
		// TODO: 在此处添加构造函数逻辑
		//
	}
    public string[] Resup ={ "上传失败或指定的文件不存在", "文件太大！", "格式不对，！", "上传成功！" };
        public string s = string.Empty;
    public string fname = string.Empty;
        public string Up(System.Web.UI.HtmlControls.HtmlInputFile File2, string Pa)
        {
            //
            // TODO: 在此处添加构造函数逻辑
            //

            if (File2.PostedFile.ContentLength.ToString() == "0")
            {
                return "0";
            }
            else
            {
                //获取文件名称
                string ss;
                 fname = System.DateTime.Now.ToString().Replace("-", "").Replace(" ", "").Replace(":", "");
                ss = System.DateTime.Now.ToString().Replace("-", "").Replace(" ", "").Replace(":", "") + Path.GetExtension(File2.PostedFile.FileName);
                if (File2.PostedFile.ContentLength / 1024 > 10000000)
                { return "1"; }
                else
                {
                    string ty = File2.PostedFile.ContentType;
                   
                        File2.PostedFile.SaveAs(System.Web.HttpContext.Current.Server.MapPath(Pa) + ss);
                        s =  ss;
                        return "3";
                        //Up= ss;
                
                }
            }

        }
    }

AddHomework.aspx:

<%@ Page Language="C#" MasterPageFile="~/MasterPage.master" AutoEventWireup="true" CodeFile="AddHomework.aspx.cs"  ValidateRequest="false" EnableEventValidation="false"  Inherits="Admin_AddFile" Title="Untitled Page" %>
<%@ Register Assembly="FredCK.FCKeditorV2" Namespace="FredCK.FCKeditorV2" TagPrefix="FCKeditorV2" %>
<asp:Content ID="Content1" runat="server"  contentplaceholderid="ContentPlaceHolder1">
    <table align="center" bgcolor="#e3ebfe" border="0" cellpadding="2" cellspacing="1"
            style="margin-top: 8px" width="98%">
                <tr>
               
               <td style="WIDTH: 3%; HEIGHT: 21px" class="td2" align="center">
                   作业名称：</td>
               <td style="HEIGHT: 21px" class="td2" colspan="3">
              <asp:TextBox ID="TextBox1" runat="server" CssClass="label" Width="558px"></asp:TextBox></td>
               
               </tr>
             <tr>
                 <td align="center" class="td2" style="width: 3%; height: 21px">
                     上传作业：</td>
                 <td align="left" class="td2" colspan="3" style="height: 21px">
                     <asp:TextBox ID="pic" runat="server" CssClass="inputBox" ReadOnly="True" Width="72px"></asp:TextBox><input
                         id="file1" runat="server" class="inputBox" style="width: 141px" type="file" /><asp:Button
                             ID="Button2" runat="server" CausesValidation="False" CssClass="formbutton" Height="22px"
                             OnClick="Button1_Click" Text="上传" Width="58px" /><asp:Label ID="Label1" runat="server"
                                 Visible="False" Width="60px"></asp:Label><input id="Hidden1" runat="server" type="hidden" /></td>
             </tr>
                 <tr>
           
               <td style="WIDTH: 3%; HEIGHT: 54px" class="td2" align="center">
                   内容说明：</td>
               <td style="WIDTH: 23%; HEIGHT: 54px" class="td2"  colspan="7">
                   <FCKeditorV2:FCKeditor ID="ArticleContent" runat="server" BasePath="~/FCKeditor/">
                        </FCKeditorV2:FCKeditor>
               </td>       
            
             </tr>
            <tr bgcolor="#e7e7e7">
                <td align="center" colspan="10" height="24">
                    <asp:Button ID="Button1" runat="server" OnClick="Button1_Click1" Text="添加" /></td>
            </tr>
        </table>

 </asp:Content>

AddHomework.aspx.cs:

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class Admin_AddFile : System.Web.UI.Page
{
    SqlHelper data = new SqlHelper();
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {

        }
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        string res;
        upload up = new upload();
        res = up.Up(file1, "../files/");

        this.Label1.Visible = true;
        this.Label1.Text = up.Resup[Convert.ToInt32(res)];
        this.pic.Text = up.s;
        Hidden1.Value = up.fname;
    }

    protected void Button1_Click1(object sender, EventArgs e)
    {
        string filename = Hidden1.Value;
        int i = this.pic.Text.LastIndexOf(".");
        string newname = this.pic.Text.Substring(i);//获取文件的扩展名

        string sql = "insert into Homework(TitleName,FileDs,FilePath,Ename,FileName)values('" + TextBox1.Text.Trim() + "','" + ArticleContent.Value + "','" + pic.Text + "','" + newname + "','" + filename + "')";
        data.RunSql(sql);

        Alert.AlertAndRedirect("添加成功继续添加", "Homework.aspx");
    }
}

[feiyun0112]

当前项目路径下有files目录吗？

[u010145097]

你的虚拟路径对吗？或者没有这个文件夹吧！？？？

[丨端木]

引用 1 楼 feiyun0112 的回复:

当前项目路径下有files目录吗？

有的

[於黾]

res = up.Up(file1, "../files/"); System.Web.HttpContext.Current.Server.MapPath(Pa) 你已经取了MapPath,又传入的../files/ 你这是要把文件存到网站文件夹外面的节奏吗? 不要把文件存到网站文件夹外面 你只应该将文件放到网站目录里面 如果就是有需要把文件放到网站目录外面,那么你需要添加虚拟目录,把那个目录加进网站目录里来

[於黾]

MapPath获取的是网站根目录的路径 跟你当前页面路径无关的 用了MapPath,就别在用相对路径的..了,直接拼接绝对路径就好

[於黾]

要么你别用MapPath,就用相对路径 不要混用

[丨端木]

引用 2 楼 u010145097 的回复:

你的虚拟路径对吗？或者没有这个文件夹吧！？？？

如何修改虚拟路径，虚拟路径方面不是很懂，刚学C#。

[huiyone]

ss = System.DateTime.Now.ToString().Replace("-", "").Replace(" ", "").Replace(":", "") + Path.GetExtension(File2.PostedFile.FileName); Replace("-", "")把这个减号改成“/” ss = System.DateTime.Now.ToString().Replace("/", "").Replace(" ", "").Replace(":", "") + Path.GetExtension(File2.PostedFile.FileName);