C. NET Method for Automatic Login of Web Pages

In this paper, an example is given to describe the method of C #. NET to realize automatic login of web pages. Share it for your reference. The details are as follows:

Using C # language to write an Windows Form application program to automatically log in to a specific page.

Take automatic login: http://localhost/Web/Login.aspx as an example to explain how to simulate manual input of user name and password and click Login to realize automatic login.

Create a new C # application, give the application a name, such as AutoLogin, add an TextBox, Button, and WebBrowser control to the form, and add an webBrowser1_DocumentCompleted event to the WebBrowser control.

The button click event and the code for webBrowser1_DocumentCompleted are as follows:

private void btn_Add_Click(object sender, EventArgs e)
{
 string sUrl = txb_Url.Text.Trim();
 if (sUrl.Length > 0)
 {
  webBrowser1.Navigate(sUrl);
 }
}
private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
 HtmlElement ClickBtn = null;
 if (e.Url.ToString().ToLower().IndexOf("login.aspx") > 0)
 {
  HtmlDocument doc = webBrowser1.Document;
  for (int i = 0; i < doc.All.Count; i++)
  {
   if(doc.All[i].TagName.ToUpper().Equals("INPUT"))
   {
    switch(doc.All[i].Name)
    {
     case "txtUserName":
      doc.All[i].InnerText = "xxxx@yy.com"; //  User name 
      break;
     case "txtPassword":
      doc.All[i].InnerText = "zzzzzz"; //  Password 
      break;
     case "btnSubmit":
      ClickBtn = doc.All[i];
      break;
    }
   }
  }
  ClickBtn.InvokeMember("Click"); //  Click the "Login" button 
 }
}

When you enter http://localhost/Web/Login. aspx in TextBox and click the button, you can realize the automatic login of the page.

I hope this article is helpful to everyone's C # programming.