The ASPNET login controls provide a robust login solution for ASPNET Web applications without requiring programming By default login controls integrate with ASPNET membership and forms authentication to help automate user authentication for a Web site It provides you with a readytouse user interface that queries the user name and password from the user and offers a Log In button for login It validate user credentials against the membership API and encapsulating the basic froms authentication functionality like redirecting back to the original requested page in a restricted area of you application after the successful login
The Login control displays a user interface for user authentication The Login control contains text boxes for the user name and password and a check box that allows users to indicate whether they want the server to store their identity using ASPNET membership and automatically be authenticated the next time they visit the site
The Login control has properties for customized display for customized messages and for links to other pages where users can change their password or recover a forgotten password The Login control can be used as a standalone control on a main or home page or you can use it on a dedicated login page If you use the Login control with ASPNET membership you do not need to write code to perform authentication However if you want to create your own authentication logic you can handle the Login controls Authenticate event and add custom authentication code
Note Login controls might not function correctly if the Method of the ASPNET Web page is changed from POST (the default) to GET
Start Microsoft Visual Studio
Create a new ASPNET WebSite using Visual Basic Like this:
Drag and drop Login control on page from ToolBox
Figure
Whenever user hits the Log In button
the control automatically validates the user name and password using the membership API function Membership
ValidateUse() and then calls FormAuthentication
redirectFromLoginPage() if the validation was successful
All options on the UI of the LoginControl affect the input delivered by the control to these methods
For Example
if you click the
Remember me next time
check box
it passes the value true to the createPresistentCookie parameter of the RedirectFromLoginPage() method
Therefore
the FormAuthenticateModule creates a persistent cookie
There are three Login Tasks by default
Auto Format
you can select default schemes
Convert To Template
You can edit content of Login Control
Administer Website
You can configure Web Site Administration Tools
Like Security
Application
Provider
Figure
<form id=form runat=server>
<div>
<asp:Login ID=Login runat=server BackColor=#FFDE BorderColor=#CCCC BorderStyle=Solid BorderWidth=px FontNames=Verdana FontSize=pt>
<TitleTextStyle BackColor=#BB FontBold=True ForeColor=#FFFFFF />
</asp:Login>
</div>
</form>
You can change styles of LoginControl using css too Like this:
LoginControl
{
backgroundcolor:#FFDE;
bordercolor:#CCCC;
borderstyle:solid;
borderwidth:px;
fontfamily:Verdana;
fontsize:px;
}
And now apply css to control:
<html xmlns=>
<head runat=server>
<title>Login Control</title>
<link type=text/css rel=Stylesheet />
</head>
<body>
<form id=form runat=server>
<div>
<asp:Login ID=Login runat=server CssClass=LoginControl>
<TitleTextStyle BackColor=#BB FontBold=True ForeColor=#FFFFFF />
</asp:Login>
</div>
</form>
</body>
</html>
If you running the page and if the CSS file is placed in a directory where anonymous access is denied the add the following configuration for the CSS file to you nfig file
<location path=StyleSheetcss>
<systemweb>
<authorization>
<allow users=*/>
</authorization>
</systemweb>
</location>
You can add several hyperlinks to your Login control such as hyperlink to a help text page or a hyperlink to to a registration page
<asp:Login ID=Login runat=server CssClass=LoginControl
CreateUserText=Register
CreateUserUrl=~/Registeraspx
HelpPageText=Additional Help HelpPageUrl=~/Helpaspx
InstructionText=Please enter your user name and password for login>
<TitleTextStyle BackColor=#BB FontBold=True ForeColor=#FFFFFF />
</asp:Login>
Looks like this :
Here is VB Code:
Imports System
Imports SystemCollectionsGeneric
Imports SystemLinq
Imports SystemWeb
Imports SystemWebUI
Imports SystemWebUIWebControls
Imports SystemDataSqlClient
Partial Class _Default
Inherits SystemWebUIPage
Protected Sub Page_Load(ByVal sender As Object ByVal e As SystemEventArgs) Handles MeLoad
If Not MeIsPostBack Then
ViewState(LoginErrors) =
End If
End Sub
Protected Sub Login_Authenticate(ByVal sender As Object ByVal e As AuthenticateEventArgs)
If YourValidationFunction(LoginUserName LoginPassword) Then
eAuthenticated = true;
LoginVisible = False
MessageLabelText = Successfully Logged In
Else
eAuthenticated = False
End If
End Sub
Protected Sub Login_LoginError(ByVal sender As Object ByVal e As EventArgs)
If ViewState(LoginErrors) Is Nothing Then
ViewState(LoginErrors) =
End If
Dim ErrorCount As Integer = CInt(ViewState(LoginErrors)) +
ViewState(LoginErrors) = ErrorCount
If (ErrorCount > ) AndAlso (LoginPasswordRecoveryUrl <> StringEmpty) Then
ResponseRedirect(LoginPasswordRecoveryUrl)
End If
End Sub
Private Function YourValidationFunction(ByVal UserName As String ByVal Password As String) As Boolean
Dim boolReturnValue As Boolean = False
Dim strConnection As String = server=;database=Vendor;uid=sa;pwd=wintellect;
Dim sqlConnection As New SqlConnection(strConnection)
Dim SQLQuery As String = SELECT UserName Password FROM Login
Dim command As New SqlCommand(SQLQuery sqlConnection)
Dim Dr As SqlDataReader
sqlConnectionOpen()
Dr = commandExecuteReader()
While DrRead()
If (UserName = Dr(UserName)ToString()) And (Password = Dr(Password)ToString()) Then
boolReturnValue = True
End If
DrClose()
Return boolReturnValue
End While
Return boolReturnValue
End Function
End Class
If you insert wrong username and password then message will show like this:
If you insert correct usename password then redirect your page whereever you want
or you can show message in ErrorLabel like this:
I am attaching my database with application in App_Data folder if u want to use my database then attach my MDF file
Any question and queries ask me any time
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From:http://tw.wingwit.com/Article/program/net/201311/13326.html
