searching a string using powershell i a web page - powershell

Question

I need to validate the username and password of this site. When I type invalid password it should check the page for string 'invalid email'. The message fail to login should be displayed. But 'success' is being displayed.? What is the mistake?
$url = "https://www.jabong.com/customer/account/login/"
$cred = Get-Credential #Read credentials
$username = $cred.username
$username = $username.Replace("\", "")
$password = $cred.GetNetworkCredential().password
$ie = New-Object -com internetexplorer.application;
$ie.visible = $true;
$ie.navigate($url);
while ($ie.Busy -eq $true)
{
Start-Sleep 1;
}
$ie.Document.getElementById("LoginForm_email").value = $username
$ie.Document.getElementByID("LoginForm_password").value=$password
$ie.Document.getElementByID("qa-login-button").Click();
while($ie.busy) {sleep 1}
$webClient = new-object System.Net.WebClient
$webClient.Headers.Add("user-agent", "PowerShell Script")
$output = $webClient.DownloadString("https://www.jabong.com/customer/account/login/")
if ($output -like "*Invalid mailid*") {
"login failed"
} else {
"success"
}
sleep(300)

Answer 1

Whilst I generally agree with #Alexander Obersht, you are only one step away from success. By creating $webClient = new-object System.Net.WebClient you establish another session to the website, when in fact you should be polling your current session inside $ie object.
Try this:
$url = "https://www.jabong.com/customer/account/login/"
$cred = Get-Credential #Read credentials
$username = $cred.username
$username = $username.Replace("\", "")
$password = $cred.GetNetworkCredential().password
$ie = New-Object -com internetexplorer.application;
$ie.visible = $true;
$ie.navigate($url);
while ($ie.Busy -eq $true)
{
Start-Sleep 1;
}
$ie.Document.getElementById("LoginForm_email").value = $username
$ie.Document.getElementByID("LoginForm_password").value=$password
$ie.Document.getElementByID("qa-login-button").Click();
while($ie.busy) {sleep 1}
$output = $ie.Document.Body.innerHTML
if ($output -like "*Invalid mail*") {
"login failed"
} else {
"success"
}
I also changed your match to Invalid mail.