试图将Gmail Atom提要保存到XML-C#

我是C#新手，在将Gmail中的XML Atom提要保存到XML文件时遇到了一些困难。我肯定我离我该去的地方还有很远的路，我很难为情地问这个问题，但我一个人是不会去任何地方的：(

我使用的Gmail处理程序类已经运行了一段时间

GmailHandler.cs

using System;
using System.Data;
using System.Xml;
using System.Net;
using System.IO;
/*
 * this code made by Ahmed Essawy
 * AhmedEssawy@gmail.com
 * http://fci-h.blogspot.com
 */
/// <summary>
/// Summary description for Class1
/// </summary>
public class GmailHandler
{
    private string username;
    private string password;
    private string gmailAtomUrl;

    public string GmailAtomUrl
    {
        get { return gmailAtomUrl; }
        set { gmailAtomUrl = value; }
    }

    public string Password
    {
        get { return password; }
        set { password = value; }
    }

    public string Username
    {
        get { return username; }
        set { username = value; }
    }

    public GmailHandler(string _Username, string _Password, string _GmailAtomUrl)
    {
        Username = _Username;
        Password = _Password;
        GmailAtomUrl = _GmailAtomUrl;
    }

    public GmailHandler(string _Username, string _Password)
    {
        Username = _Username;
        Password = _Password;
        GmailAtomUrl = "https://mail.google.com/mail/feed/atom";
    }
    public XmlDocument GetGmailAtom()
    {
        byte[] buffer = new byte[8192];
        int byteCount = 0;
        XmlDocument _feedXml = null;
        try
        {
            System.Text.StringBuilder sBuilder = new System.Text.StringBuilder();
            WebRequest webRequest = WebRequest.Create(GmailAtomUrl);

            webRequest.PreAuthenticate = true;

            System.Net.NetworkCredential credentials = new NetworkCredential(this.Username, this.Password);
            webRequest.Credentials = credentials;

            WebResponse webResponse = webRequest.GetResponse();
            Stream stream = webResponse.GetResponseStream();

            while ((byteCount = stream.Read(buffer, 0, buffer.Length)) > 0)
                sBuilder.Append(System.Text.Encoding.ASCII.GetString(buffer, 0, byteCount));


            _feedXml = new XmlDocument();
            _feedXml.LoadXml(sBuilder.ToString());


        }
        catch (Exception ex)
        {
            //add error handling
            throw ex;
        }
        return _feedXml;
    }

}

当我运行程序时，我得到一个“WebException未处理-远程服务器返回一个错误：（407）需要代理身份验证。”

---

如果您有任何建议，我们将不胜感激！

我已经尝试过该代码，它运行良好（但我的网络中没有代理）

我已经更改了GmailHandler.cs，构造函数现在接受internet代理

using System;
using System.Data;
using System.Xml;
using System.Net;
using System.IO;
/*
 * this code made by Ahmed Essawy
 * AhmedEssawy@gmail.com
 * http://fci-h.blogspot.com
 */
/// <summary>
/// Summary description for Class1
/// </summary>
public class GmailHandler
{
    private string username;
    private string password;
    private string gmailAtomUrl;
    private string proxy;

    public string GmailAtomUrl
    {
        get { return gmailAtomUrl; }
        set { gmailAtomUrl = value; }
    }

    public string Password
    {
        get { return password; }
        set { password = value; }
    }

    public string Username
    {
        get { return username; }
        set { username = value; }
    }

    public string Proxy
    {
        get { return proxy; }
        set { proxy = value; }
    }

    public GmailHandler(string _Username, string _Password, string _GmailAtomUrl, string _proxy = null)
    {
        Username = _Username;
        Password = _Password;
        GmailAtomUrl = _GmailAtomUrl;
        Proxy = _proxy;
    }

    public GmailHandler(string _Username, string _Password, string _proxy = null)
    {
        Username = _Username;
        Password = _Password;
        GmailAtomUrl = "https://mail.google.com/mail/feed/atom";
        Proxy = _proxy;
    }
    public XmlDocument GetGmailAtom()
    {
        byte[] buffer = new byte[8192];
        int byteCount = 0;
        XmlDocument _feedXml = null;
        try
        {
            System.Text.StringBuilder sBuilder = new System.Text.StringBuilder();
            WebRequest webRequest = WebRequest.Create(GmailAtomUrl);

            if(!String.IsNullOrWhiteSpace(Proxy))
            webRequest.Proxy = new WebProxy(Proxy, true);

            webRequest.PreAuthenticate = true;

            System.Net.NetworkCredential credentials = new NetworkCredential(this.Username, this.Password);
            webRequest.Credentials = credentials;

            WebResponse webResponse = webRequest.GetResponse();
            Stream stream = webResponse.GetResponseStream();

            while ((byteCount = stream.Read(buffer, 0, buffer.Length)) > 0)
                sBuilder.Append(System.Text.Encoding.ASCII.GetString(buffer, 0, byteCount));


            _feedXml = new XmlDocument();
            _feedXml.LoadXml(sBuilder.ToString());


        }
        catch (Exception ex)
        {
            //add error handling
            throw ex;
        }
        return _feedXml;
    }
}

---

你需要一个网络客户端或http请求。尽管只是一个猜测…我似乎走得更远了，但我仍然遇到了路障，我认为这是因为代理本身需要凭据。我一直在四处寻找，看看如何才能通过。谢谢你的帮助，非常感谢！我找到了一篇关于这一点的帖子：This应该有帮助：WebProxy WebProxy=new WebProxy（“，true）{Credentials=new NetworkCredential（“username”，“pw”），UseDefaultCredentials=false}；request.Proxy=WebProxy；

using System;
using System.Data;
using System.Xml;
using System.Net;
using System.IO;
/*
 * this code made by Ahmed Essawy
 * AhmedEssawy@gmail.com
 * http://fci-h.blogspot.com
 */
/// <summary>
/// Summary description for Class1
/// </summary>
public class GmailHandler
{
    private string username;
    private string password;
    private string gmailAtomUrl;
    private string proxy;

    public string GmailAtomUrl
    {
        get { return gmailAtomUrl; }
        set { gmailAtomUrl = value; }
    }

    public string Password
    {
        get { return password; }
        set { password = value; }
    }

    public string Username
    {
        get { return username; }
        set { username = value; }
    }

    public string Proxy
    {
        get { return proxy; }
        set { proxy = value; }
    }

    public GmailHandler(string _Username, string _Password, string _GmailAtomUrl, string _proxy = null)
    {
        Username = _Username;
        Password = _Password;
        GmailAtomUrl = _GmailAtomUrl;
        Proxy = _proxy;
    }

    public GmailHandler(string _Username, string _Password, string _proxy = null)
    {
        Username = _Username;
        Password = _Password;
        GmailAtomUrl = "https://mail.google.com/mail/feed/atom";
        Proxy = _proxy;
    }
    public XmlDocument GetGmailAtom()
    {
        byte[] buffer = new byte[8192];
        int byteCount = 0;
        XmlDocument _feedXml = null;
        try
        {
            System.Text.StringBuilder sBuilder = new System.Text.StringBuilder();
            WebRequest webRequest = WebRequest.Create(GmailAtomUrl);

            if(!String.IsNullOrWhiteSpace(Proxy))
            webRequest.Proxy = new WebProxy(Proxy, true);

            webRequest.PreAuthenticate = true;

            System.Net.NetworkCredential credentials = new NetworkCredential(this.Username, this.Password);
            webRequest.Credentials = credentials;

            WebResponse webResponse = webRequest.GetResponse();
            Stream stream = webResponse.GetResponseStream();

            while ((byteCount = stream.Read(buffer, 0, buffer.Length)) > 0)
                sBuilder.Append(System.Text.Encoding.ASCII.GetString(buffer, 0, byteCount));


            _feedXml = new XmlDocument();
            _feedXml.LoadXml(sBuilder.ToString());


        }
        catch (Exception ex)
        {
            //add error handling
            throw ex;
        }
        return _feedXml;
    }
}

        //Create the object from GmailHandler class
        GmailHandler gmailFeed = new GmailHandler("username", "password", "http://proxyserver:80/");            

        //get the feed
        XmlDocument myXml = gmailFeed.GetGmailAtom();


        XmlTextWriter writer = new XmlTextWriter("data.xml", null);
        writer.Formatting = Formatting.Indented;
        myXml.Save(writer);