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Javascript : adding x days to a date

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  • Javascript : adding x days to a date

    Hi,
    I have a date field in a ux, I would like to have the date of next week (adding 7 days to the date).
    I tried few chunk of codes I found online but I did not have any success...
    The result should be a normal simple date format "26/07/2016" since I want to show it in another textbox.

    Thank you for your help,
    Last edited by PaulAmmoun; 07-25-2016, 11:36 PM.

  • #2
    Re: Javascript : adding x days to a date

    Originally posted by PaulAmmoun View Post
    Hi,
    I have a date field in a ux, I would like to have the date of next week (adding 7 days to the date).
    I tried few chunk of codes I found online but I did not have any success...
    The result should be a normal simple date format "26/07/2016" since I want to show it in another textbox.

    Thank you for your help,

    if you want to add the next week day on the date picker textbox, go to your date textbox, initial value, put this code ---> =date()+7
    Then you want to show it in another textbox, on your datepicker textbox -> on change event :
    Code:
    //Read value in 'LASTNAME' field.
    var mydate = {dialog.object}.getValue('TEXTBOX1');
    {dialog.object}.setValue('TEXTBOX2',mydate);
    if you want to do that in xbasic code ---> Dim myDate as D = date()+7
    Last edited by ferryk17; 07-25-2016, 11:45 PM.

    Comment


    • #3
      Re: Javascript : adding x days to a date

      If you're selecting a date from a date textbox and you want to auto-fill another textbox with a the date a week later, you could do this...

      In the onChange event of your Date Textbox...

      Code:
      var d1 = new Date();
      d1.fromFormat(this.value,'dd/MM/yyyy');
      d1.setDate(d1.getDate()+7);
      var d2 = d1.toFormat('dd/MM/yyyy');
      {dialog.Object}.setValue('date2',d2);
      Since you're in the onChange event of a textbox, you can use this.value to get it's current value.
      Get that value, turn it into a date object, add 7 days, format it the way you need, and set the 2nd Date textbox.

      Comment


      • #4
        Re: Javascript : adding x days to a date

        Thank You David,
        I am posting my code since I had to do a small change to your code make it work.
        When I tried :
        var d1 = {dialog.object}.getValue('FromDate')
        d1.fromFormat(this.value,'dd/MM/yyyy');
        I was receiving an error message saying fromFormat is not available. While I am sure the "FromDate" textbox is of type DATE. I also tried changing it to type TIME with no success.

        This is what worked

        var mSess = {dialog.object}.getValue('No_Of_Sessions');
        for (i = 0; i < mSess; i++) {
        var d1 = {dialog.object}.getValue('FromDate');
        var parts =d1.split('/');
        var d1 = new Date(parts[2],parts[1]-1,parts[0]);
        d1.fromFormat(this.value,'dd/MM/yyyy');
        d1.setDate(d1.getDate()+(i*7));
        var d1 = d1.toFormat('dd/MM/yyyy');
        {dialog.object}.setValue('EndD',d1) ;
        alert(d1);

        Comment


        • #5
          Re: Javascript : adding x days to a date

          instead try this:
          var d1 = {dialog.Object}.getValue('FROMDATE');
          d1 = new Date(d1);
          var d2 = d1.setDate(d1.getDate() + 7);
          d2 = new Date(d2);
          {dialog.Object}.setValue('ENDD', d2.toFormat('dd/MM/yyyy'));
          Last edited by GGandhi; 07-26-2016, 08:59 PM.
          thanks for reading

          gandhi

          version 11 3381 - 4096
          mysql backend
          http://www.alphawebprogramming.blogspot.com
          [email protected]
          Skype:[email protected]
          1 914 924 5171

          Comment


          • #6
            Re: Javascript : adding x days to a date

            Code:
            var mSess = {dialog.object}.getValue('No_Of_Sessions');
             for (i = 0; i < mSess; i++) {
            var d1 = {dialog.Object}.getValue('FROMDATE');
             d1 = new Date(d1);
             var d2 = d1.setDate(d1.getDate() + (i*7));
             d2 = new Date(d2);
             {dialog.Object}.setValue('ENDD', d2.toFormat('dd/MM/yyyy')); 
            }
            to match your code
            thanks for reading

            gandhi

            version 11 3381 - 4096
            mysql backend
            http://www.alphawebprogramming.blogspot.com
            [email protected]
            Skype:[email protected]
            1 914 924 5171

            Comment


            • #7
              Re: Javascript : adding x days to a date

              Paul, this must be just a portion of your code. From what's posted the loop is not closed. I'm not sure why you're using a loop if you're setting the same value for EndD on each iteration.

              .fromFormat is for creating a date object from a string. If you're already working with a date object then .fromFormat is not needed.

              Comment


              • #8
                Re: Javascript : adding x days to a date

                Originally posted by Davidk View Post
                Paul, this must be just a portion of your code. From what's posted the loop is not closed. I'm not sure why you're using a loop if you're setting the same value for EndD on each iteration.

                .fromFormat is for creating a date object from a string. If you're already working with a date object then .fromFormat is not needed.
                Hi David,
                It's true this is just a part, I am doing a for loop because I have a Nbre of appointments and want to save in a separate table each appointment date (weekly).
                As an example: I want 4 appointments weekly, starting 27-7-2017. Before the end of the loop I am calling an ajax callback to save in a table each appointment (date and time).
                I am also adding a time from another separate field. it is then displayed in a web2cal.
                I think I could have done it all in the ajax callback in xbasic, it may be easier but I just want to learn more of JavaScript, Which I know very little of.. :)...
                it also gives me the flexibility to add it to a list control (instead of using ajax callback) where it could be synchronized later to the table.
                Thank you again for your help,

                Ghandi: I think Javascript is not liking that my date are formatted dd/MM/yyyy when I use just : d1 = new Date(d1) then I get a wrong date (d1 is formated "dd/MM/yyyy", the result is a date but instead of 27/7/2016 I get 27/02/2018 or something similar (weird).
                that's why I ended up using :
                var parts =d1.split('/');
                var d1 = new Date(parts[2],parts[1]-1,parts[0])
                I am specifying the day,month and year as separated fields... then I am getting the right date

                As I said I am don't have a lot of knowledge in javascript... I am not sure if what I am saying make sense..

                Regards,

                Comment

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