How to validate a slider

2 posts, 0 answers
  1. viscious
    viscious avatar
    18 posts
    Member since:
    Aug 2006

    Posted 15 Jul 2008 Link to this post

    I have a survey page. basically there are like 40 questions, each question can be answered with a numerical value of 1 through 6.  We are using sliders to let people choose the answer to each question.

    I would like to use something like an <asp:RequiredFieldValidator /> to make sure the user chooses a value between 1 and 6.

    What we have actually done is set the minvalue on the slider to 0 and max value to 6, but we are considering a selection of 0 as a question that hasn't been answered.  So basically I need to use a validation control to validate that the slider value is not 0.  I need it to work like the builtin validation controls work, with a validation group, and client and server side validation support. 

    I know that I could set the slider range to 1 - 6, and then I could guarantee that I won't get any 0 values.  But that is not an acceptable solution, we don't want people to select the default value, we want them to explicilty choose a value.

    Is there anyway to do what I am asking for?  The slider doesnt even have the standard ValidationGroup property.

  2. Georgi Tunev
    Georgi Tunev avatar
    7207 posts

    Posted 16 Jul 2008 Link to this post

    Hello viscious,

    Having a validation for RadSlider is in our ToDo list for one of the following versions of the control. For the time being, we can suggest to use a custom validator that would make the check on the server. For convenience I attached a small sample that shows this approach in action.

    Georgi Tunev
    the Telerik team

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