I have created Login.aspx Page On Click of Login Button.I invoke the code as follows
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Dim adPath As String = "LDAP://172.21.1.19" 'Path to your LDAP directory server
Dim adAuth As New Authentication. FormsAuth.LDapA uthentication(a dPath)
Try
If (True = adAuth.IsAuthen ticated(txtDoma in.Text, txtUsername.Tex t, txtPassword.Tex t))...