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How to change user password in a .NET application

P: n/a

I'm trying to make an application that allow a user, through a web form
to change its password

On a click event, here is the code

DirectoryEntry usr = new DirectoryEntry(
password, AuthenticationTypes.Secure);
new object[]{password, newpassword} );

where password is the current user password
newpassword... the new password
user, the login
theUserDn, something like
I have got an exception :

[COMException (0x8007202f): Une violation de contrainte s'est produite.]

[TargetInvocationException: Une exception a été levée par la cible d'un
System.RuntimeType.InvokeDispMethod(String name, BindingFlags
invokeAttr, Object target, Object[] args, Boolean[] byrefModifiers,
Int32 culture, String[] namedParameters) +0
System.RuntimeType.InvokeMember(String name, BindingFlags
invokeAttr, Binder binder, Object target, Object[] args,
ParameterModifier[] modifiers, CultureInfo culture, String[]
namedParameters) +473
System.Type.InvokeMember(String name, BindingFlags invokeAttr,
Binder binder, Object target, Object[] args) +29
System.DirectoryServices.DirectoryEntry.Invoke(Str ing methodName,
Object[] args) +107
clarins.u1_1.Button1_Click(Object sender, EventArgs e) +108
System.Web.UI.WebControls.Button.OnClick(EventArgs e) +108

System.Web.UI.WebControls.Button.System.Web.UI.IPo stBackEventHandler.RaisePostBackEvent(String
eventArgument) +57
System.Web.UI.Page.RaisePostBackEvent(IPostBackEve ntHandler
sourceControl, String eventArgument) +18
System.Web.UI.Page.RaisePostBackEvent(NameValueCol lection postData) +33
System.Web.UI.Page.ProcessRequestMain() +1277

Do you have any idea?
Nov 19 '05 #1
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