Question

我正在使用ASPX构建一个简单的页面。

在此页面中，我显示文件组件。使用此组件，用户可以选择本地文件：

<div class="row">
    <form class="form-horizontal">
        <div class="form-group">
            <input type="file" id="selectFile" >
        </div>
    </form>
</div>

现在，我想以编程方式设置此文件。因此，从我的Default.aspx.cs代码中我可以看到：

protected void Page_Load(object sender, EventArgs e)
{
    String s = Request.QueryString["idEsame"];
    //RECUPERO IL FILE ED IL PATH DEL FILE

    string[] fileEntries = Directory.GetFiles("C:\\Users\\michele.castriotta\\Desktop\\deflate_tests");
    foreach (string fileName in fileEntries)
    {
        // here i need to compare , i mean i want to get only these files which are having these type of  filenames `abc-19870908.Zip`
        if(fileName == "file")
        {

        }

    }
}

现在，如果文件名是“文件”，那么我想在页面上自动加载该文件。

我该怎么做？

Answer 1

如果您的模式是“ {3个字母}-{8个数字}。{Zip}”，则可以使用.Where(f => myRegex.IsMatch(f))来过滤文件：

RegexOptions options = RegexOptions.IgnoreCase;
string pattern = @"^\w{3}-\d{8}\.zip$";

string directoryPath = "C:\\Users\\michele.castriotta\\Desktop\\deflate_tests";
var fileEntries = Directory.GetFiles(directoryPath).Where(f => myRegex.IsMatch(f));    

foreach (string fileName in fileEntries)
{
  // Process

}

Answer 2

第1步：在页面中（sample.aspx）

插入以下代码：

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="sample.aspx.cs" Inherits="sample" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        &nbsp;Select File:
        <asp:FileUpload ID="FileUploader" runat="server" />
        <br />
        <br />
        <asp:Button ID="UploadButton" runat="server" Text="Upload" OnClick="UploadButton_Click" /><br />
        <br />
        <asp:Label ID="Label1" runat="server"></asp:Label></div>
    </form>
</body>
</html>

STEP2：在代码页中，例如说（sample.aspx.cs）

插入以下代码：

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 sample : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void UploadButton_Click(object sender, EventArgs e)
    {
        if (FileUploader.HasFile)
            try
            {
                FileUploader.SaveAs(Server.MapPath("confirm//") +
                     FileUploader.FileName);
                Label1.Text = "File name: " +
                     FileUploader.PostedFile.FileName + "<br>" +
                     FileUploader.PostedFile.ContentLength + " kb<br>" +
                     "Content type: " +
                     FileUploader.PostedFile.ContentType + "<br><b>Uploaded Successfully";
            }
            catch (Exception ex)
            {
                Label1.Text = "ERROR: " + ex.Message.ToString();
            }
        else
        {
            Label1.Text = "You have not specified a file.";
        }

    }
}

如何从aspx.cs类将文件加载到文件组件中？

2 个答案: