利用ASP.NET WebClient的UploadData來做一個自動登入網頁的小程式

2008-03-24

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ASP.NET

前陣子看到有人提到這方面的問題....

都沒什麼時間去研究..呵呵..可能工作太忙了吧...

最近抽空來研究這個問題...也實作了一個demo程式...

分享給大家呀....

首先要準備一個登入的頁面...Login.aspx

然後再透過一個AutoLogin.aspx的網頁自動登入Login.aspx那頁...

c#範例...

login.aspx

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

<!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>login</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
            <asp:Label ID="Label1" runat="server" Text="uid："></asp:Label>
            <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
            <br />
            <asp:Label ID="Label2" runat="server" Text="pwd："></asp:Label>
            <asp:TextBox ID="TextBox2" runat="server" TextMode="Password"></asp:TextBox>
            <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Login" />
          </div>
    </form>
</body>
</html>

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 login : System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

}

protected void Button1_Click(object sender, EventArgs e)

{

if (TextBox1.Text == "puma" && TextBox2.Text == "123456")

{

Response.Write("登入成功");

}

else

{

Response.Write("登入失敗");

}

AutoLogin.aspx

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

<!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>AutoLogin</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:TextBox ID="TextBox1" runat="server" Height="358px" TextMode="MultiLine" Width="542px"></asp:TextBox></div>
    </form>
</body>
</html>

AutoLogin.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;

using System.Net;

using System.Text;

public partial class AutoLogin : System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

//登入的頁面

string uriString = "http://localhost:53322/WebSite/Login.aspx";

//__VIEWSTATE的值先到登入頁面檢視原始碼,並且Copy __VIEWSTATE的值

//Button1=Login表示按下Button1

string postString = string.Format("__VIEWSTATE={0}&TextBox1={1}&TextBox2={2}&Button1=Login",

System.Web.HttpUtility.UrlEncode("/wEPDwUKMTYzNzQ1NDcxN2RkM8XzCpooa6HHvH1Pj/0RBs2Mr9A="), "puma", "123456");

WebClient webClient = new WebClient();

webClient.Headers.Add("Content-Type", "application/x-www-form-urlencoded");

byte[] postData = Encoding.Default.GetBytes(postString);

byte[] responseData = webClient.UploadData(uriString, "POST", postData);

string srcString = Encoding.UTF8.GetString(responseData);

//取得登入頁按下Button1 postback後的結果

this.TextBox1.Text = srcString;

}

執行結果：

AutoLogin.aspx

參考網址：
http://www.cnblogs.com/thunderdanky/articles/819156.html

http://www.blueshop.com.tw/board/show.asp?subcde=BRD200802261921229EU&fumcde=FUM20041006161839LRJ

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