ASP.Net MVC3 Html.PasswordFor does not populate

问题:

In my view I have the following element

  @Html.PasswordFor(model => model.Password)

This is on a screen that creates/updates user details. When I am trying to update the user this field remains blank. When I change this element to a TextBoxFor it gets the data. How do I get to populate the Password field.

回答1:

This is as designed. Passwords are not filled to prevent accidental resubmits, and to prevent the page from containing unencrypted passwords. Obviously the password was wrong to begin with if you're posting back the credentials.

In your case, you could create an extension that does input the data, or just use an HTML input of type password.

回答2:

As described above, it is better to avoid doing this for security reason. if you still want to persist the password so that you proceed from where the current validation failed, you can use the HTML helper with html attribute parameter:

     Html.PasswordFor(x => x.Password, new { value = Model.Password})

回答3:

MVC protects you from doing something like this for a reason. You shouldn't actually be able to do this because the users password should not be stored unencrypted and unhashed. If your goal is to end end up on http://plaintextoffenders.com/ though, you can do something like:

<input type="password" name="Password" id="Password" value="@Model.Password" />

回答4:

I found this workaound. I needed my password shown in the form:

@model User
@{
    @Html.Label(Model.Username, new { @class = "label" })
    @Html.TextBoxFor(Model => Model.Username, new { @class = "form-control" })

    @Html.Label(Model.Password, new { @class = "label" })
    @Html.TextBoxFor(Model => Model.Password, new { @class = "form-control make-pass" })
}

<script type="text/javascript">
    $(".make-pass").attr("type", "password");
</script>

This will make your input password-type without losing the value.