how to change the password in membership with oldpassword checking

Question

I developed a web application. It has a login form using ASP.NET membership. Now I need to add a form allowing to change the password. Before a new password can be set, the old password must be entered by the user.

How can I check if the old password is valid?

What `PasswordFormat` does your MembershipProvider has been configured for? If it's `Hashed` you cannot check the old password because [SHA1](http://www.tech-faq.com/sha-1.html) is a one-way hash function. The membership provider simply will throw an exception if you try to call `GetPassword()` even if you have configured `enablePasswordRetrieval=true` in web.config what is another precondition. — Tim Schmelter, Jun 08 '11 at 09:21
I re-wrote the original question - I think it's easier to understand now. — Marek Grzenkowicz, Jun 08 '11 at 10:00

Marek Grzenkowicz · Answer 1 · 2011-06-08T12:20:58.797

1

// checking if the old password is correct
if (Membership.ValidateUser(username, oldPassword))  
{  
    // setting a new password
    string newPassword = MembershipUser.ResetPassword();  
}

Membership.ValidateUser
Membership.ResetPassword

edited Jun 08 '11 at 12:20

answered Jun 08 '11 at 09:01

Marek Grzenkowicz

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score 0 · Answer 2 · answered Jun 08 '11 at 08:30

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if The User logged In then you have the User Id

so retrieve all user Information like user name password using It.

now you Can just ask User to enter his old password now match this two if both matched then change the password with new One.

answered Jun 08 '11 at 08:30

Vir

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hi thank you for giving response how can i get oldpassword from membership please. – Victor Athoti. Jun 08 '11 at 08:33

score 0 · Answer 3 · answered Jun 13 '11 at 15:57

0

Use the ChangePassword control.

http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.changepassword.aspx

answered Jun 13 '11 at 15:57

Greg

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how to change the password in membership with oldpassword checking

3 Answers3