how to call a html image button clicik not by clicking on...

Question

how to call a html image button clicik not by clicking on html image but by calling the click method in your code.

this is my html image type

<input type="image" name="ctl00$CphPageMiddle$ctl00" ïd="btnLogin" src="../Style/LoginPage/img/signin.png" class="img-responsive" style="cursor: pointer">

now i want to call a click by my code that is written in my class file.First of all i load all the html element of the particular page (this is the login page) .Now i want to fire a button from my class file.With the help of web browser element i load all the contents of this page and done the following things..

 

Console.WriteLine(wb.Document.Body.InnerHtml);

HtmlDocument doc = wb.Document;

HtmlElement username = doc.GetElementById("CphPageMiddle_txtUserID");

HtmlElement password = doc.GetElementById("CphPageMiddle_txtPassword");

 NOW I SET ATTRIBUTES TO USERNAME AND PASSWORD

username.SetAttribute("value", "ID");

password.SetAttribute("value", "PWD");

NOW I WANT TO KNOW HOW I CAN FIRE THE ABOVE HTML INPUT TYPE IMAGE

AND AFTER FIRE THE HTML ELEMENT GO  TO THE RESPECTIVE PAGE.  

 

HERE IS MY FULL CODE GIVEN BELOW-

 

class Program

{

private static bool completed = false;

private static WebBrowser wb;

[STAThread]

static void Main(string[] args)

{

wb = new WebBrowser();

wb.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(wb_DocumentCompleted);

//wb.Navigate("http://www.erecsdharge.com");

wb.Navigate(@"http://www.abc.com/default.aspx");

while (!completed)

{

Application.DoEvents();

Thread.Sleep(100);

}

Console.Write("\n\nDone with it!\n\n");

Console.ReadLine();

}

static void wb_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)

{

try

{

if (!completed)

{

Console.WriteLine(wb.Document.Body.InnerHtml);

HtmlDocument doc = wb.Document;

HtmlElement username = doc.GetElementById("CphPageMiddle_txtUserID");

HtmlElement password = doc.GetElementById("CphPageMiddle_txtPassword");

// HtmlElement submit = doc.get("btnLogin");

username.SetAttribute("value", "ID");

password.SetAttribute("value", "PWD");

// submit.InvokeMember("click");

//after click on login button return to main page by navigate to the main page here.....

wb = new WebBrowser();

wb.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(wb_DocumentCompletedlanding);

wb.Navigate(@"http://www.abc.com/mainpage.aspx");

if (wb.Url.ToString().IndexOf("LandingPage.aspx") > -1)

{

completed = false;

while(!completed)

{

Application.DoEvents();

Thread.Sleep(100);

}

}

Console.WriteLine();

completed = true;

}

}

catch(Exception ex)

{

throw ex;

}

}

static void wb_DocumentCompletedlanding(object sender, WebBrowserDocumentCompletedEventArgs e)

{

try

{

if (!completed)

{

Console.WriteLine(wb.Document.Body.InnerHtml);

}

}

catch (Exception ex)

{

throw ex;

}

}

}

 

Any help will be greatly appreciated.Please give me the needfull help.Thanks.