c# - 以编程方式自动化 Web 登录

Question

我正在尝试创建一个 C# Winforms 应用程序，它会自动将我登录到站点并下载数据。具体来说，我想让我的应用程序自动登录我的网上银行网站，让我登录并下载我的交易历史记录。我可以通过网络浏览器登录并下载它来手动执行此操作。我正在尝试自动化这个。我知道我可能需要使用 HttpWebRequest 和 HttpWebResponse。有没有人有这方面的例子或我需要采取的步骤框架？请记住，这将是安全站点 (https)，​​我将不得不以某种方式收集 session 信息并在 session 期间保留 session 信息。有什么想法吗？

Answer 1

using System;

using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Net;
using System.IO;

namespace testSSL
{
    public partial class FormDownload : Form
    {
        private bool success;
        private const string filename = "file.txt";
        private const string url_string = "https://some.url.com";
        private Uri url;
    public FormDownload()
    {
        InitializeComponent();
        success = false;
        url = new Uri(url_string);
    }

    public bool StartDownload()
    {
        this.ShowDialog();
        return success;
    }

    private void Form1_Load(object sender, EventArgs e)
    {
        this.Activate();

        progressBar1.Maximum = 100;
        label1.Text = "Working";

        WebClient client = new WebClient();
        client.DownloadProgressChanged += new DownloadProgressChangedEventHandler(client_DownloadProgressChanged);
        client.DownloadFileCompleted += new AsyncCompletedEventHandler(client_DownloadFileCompleted);

        //possible fix for running on w2k
        ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3;

        string user="user", pass="pass";
        client.Credentials = new NetworkCredential(user, pass);
        try
        {
            client.DownloadFileAsync(url, filename);
        }
        catch (Exception ue)
        {
            writeException(ue.Message);
        }

    }

    void client_DownloadFileCompleted(object sender, AsyncCompletedEventArgs e)
    {
        if (e.Error != null)
        {
            writeException(e.Error.Message);
            success = false;
        }
        else
        {
            label1.Text = "Done";
            System.Threading.Thread.Sleep(100);
            success = true;
        }
        this.Close();
    }

    void client_DownloadProgressChanged(object sender, DownloadProgressChangedEventArgs e)
    {
        progressBar1.Value = e.ProgressPercentage;
    }

    private void writeException(string ex)
    {
        ex = "Date: " + DateTime.Now.ToString() + " Exception: " + ex + "\r\n";
        File.AppendAllText("downloadLog.txt", ex);
        MessageBox.Show("An error has occurred; it has been logged");
        this.Close();
    }
}

}