Display error message on web page

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I want to display an error message on my login page if the user enters invalid credentials.

Can anyone help me with that?

Posted 21-Jan-11 4:10am

RKT S

Updated 21-Jan-11 4:13am

Nish Nishant

v3

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Nish Nishant 21-Jan-11 10:13am

Added ASP.NET tag.

3 solutions

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Nish Nishant · Answer 1 · 2011-01-21T04:12:00

Solution 1

This is really basic ASP.NET. Start here: http://msdn.microsoft.com/en-us/library/ms178331(v=VS.90).aspx[^]

Posted 21-Jan-11 4:12am

Nish Nishant

Sandeep Mewara · Answer 2 · 2011-01-21T04:15:00

Solution 2

I won't give any link for this question but steps for you to try.

Steps:
1. Keep a label with Visibility as false on your page (you can place it somewhere below login button)
2. On login button click, check for login credentials. If found wrong then set the visibility of the label true and set the text of that label.

Try!

Posted 21-Jan-11 4:15am

Sandeep Mewara

Comments

RKT S 21-Jan-11 10:21am

thanks Sandeep..it works..:)

Sandeep Mewara 21-Jan-11 10:35am

Your welcome. Had fun implementing it? Take step-by-step and you will learn and enjoy. :)

ahsan sarfraz · Answer 3 · 2011-01-21T20:16:00

hey,
you can register a client script after the login button is pressed. and show a javascript alert message.

e.g.

if (Validated)
{
//do stuff;
}
else
{
ScriptManager.RegisterClientScriptBlock(Me.Page, Me.GetType(), "ShowError", "return InvalidLogin();", True)
}

and in the markup of your page add the script

<script type="text/javascript">
function InvalidLogin()
{
alert("Invalid username or password");
return false;
}

best of luck
Ahsan Sarfraz