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Radiobutton choices

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    Radiobutton choices

    I wish to display some data in a grid, and for each record in the grid give the user a list of options on radiobuttons which are related to this record. The list of options is held in a table � the number of options is variable. I can see how to create some radiobuttons, with a dynamic list of choices, but what I need to do is to pass a value from the main record on which to base the selection criteria for the list of radiobuttons. Does anyone know how to do this? Or are there any other techniques that may help?

    Re: Radiobutton choices

    Could you elaborate; not sure what you mean by 'selection criteria' being passed.
    Steve Wood
    See my profile on IADN


      Re: Radiobutton choices

      Hi Steve,
      I have 2 SQL Server tables � questions and options. Let�s say that the first record in the question table is �What is the capital of France�. There are 4 records in the options table which relate to this question: �Berlin�, �London�, �Paris�, �Madrid�. The second row in the questions table is �Where is Lyon?�, with 4 records in the options table: �Spain�, �Germany�, �England�,�France�.
      When I display question 1 to the user, I want to display the 4 options that relate to the question, from which the user must select only one, so I thought I would use radio buttons for this. Then display question 2, with its 4 options. Therefore, when listing the options as radio buttons, I need to restrict the list of choices to the 4 options that relate to the question.
      I have tried setting a field on the grid as a radiobutton control type, but when specifying the dynamic radiobutton choices I can�t see how to set up the SQL command to only select records from the options table where a field in the options table = the field from the questions table.
      Is this any clearer? Or is there another technique that I could use to display a list of choices to the user?


        Re: Radiobutton choices

        You can do it, but you have to work outside of the Grid's radiobutton object to do so. The radiobutton, dropdown, checkbox fields do not allow you to create a dynamic filter right in the object's "Filter" field. Instead of basing your selection field on a table, you define it as from a Variable. (List type=Dynamic >Data Source Type=Variable).

        You then have to create your variable somewhere else, normally in the same A5W page where the grid resides. (In v10 you can populate the variable from the grid events, or the A5W page. In v9, only from an a5w page.

        So presumably if your user is viewing question #123, then "123", or an ID representing question #123, is sitting in the URL or a variable somehow at the time the user is looking at that question.

        If so, then in the A5W page you can populate your variable like this:

        answerchoices = table.external_record_content_get([PathAlias.ADB_Path]\myanswers","answerset","sequence","id="+quote(x))

        where x is whatever variable is holding the current question ID. For instance, if you had questionno in the url, x would be "questionno".
        Steve Wood
        See my profile on IADN


          Re: Radiobutton choices

          I was browsing for a solution to related issue and came across this. I had a similar issue, I dont understand Steves comments, he's a guru and I'm still learning but what I did answered this albeit not as elegantly so hopefully it helps someone.

          I learnt to create a UDF (User defined function) in the grid control where I wanted to have the multi choice options appear, basically (and it was not for the feint hearted) the UDF takes some values from the grid, in this case the grid would be based on and gleaned from the questions table (e.g. QuestionID and current row number) and passes these to a function I wrote.

          To create somewhere to put the UDF I had to create a dummy field in my grid, to create the dummy field I inserted into my SQL statement a new column e.g. DummyColumn AS '' then in the grid I made the control type a UDF.

          The purpose of the Xbasic function is then to take the QuestionID which gest passed in from the UDF and use it to make it an argument that forms part of a SQL query that talks to the Answers table (which stores the QuestionID as the FK) and returns the related answers (options) related to the QuestionID. So you know have the options related to your question. Once you have them in your record set (I call my record set variable rs) you then apply the .tostring() method to the record set i.e. rs.tostring() which puts the returns values into a nice crlf string (basically each option ends up on its own line) then you use what is called an A5 helper function called A5_radiobuttons() . This is a funky little function that takes a number of parameters including the crlf string. Its job in life is turn the options into a list of radio buttons. A critical parameter you must pass into this is a javascript event handler that manages the user interaction of changing options. Unfortunately to do this you need to learn to write a javascript function.

          Here is what my UDF function looked like:
          AnswerOptions_render = "<div style=\"width:800px; word-wrap: break-word; \" id=\"radioBtn_"+Args.RowNumber+"\">" + generateAnswerOptions(Data.QuestionID,Data.Answer,Args.RowNumber)+"</div>"

          Here is what my xbasic function looked like
          function generateAnswerOptions as c (questionID as n, selectedAnswer as c, currentRowNumber as n)
          dim html as c
          dim choices as c
          dim args as sql::Arguments
          dim cn as sql::Connection
          dim sqlCommand as c
          dim rs as sql::ResultSet
          args.Set("filter",questionID)'set the argument to the value of question which is passed into the function at the start from the trigger
          sqlCommand = "SELECT Answer FROM [SOPPaC_Steps_Q_Answers] where QuestionID =:filter" 'pull in the answers that are filtered by the filter
          rs = cn.ResultSet 'stuff em into a variable called rs as a ResultSet
          choices = rs.tostring()'convert ResultSet into a crlf string and whack these into a variable called choices
          html = a5w_radiobuttons(choices, "AnswerOptions_" + currentRowNumber,"" ,"","vertical","onchange=setanswer("+currentRowNumber+")","AnswerOptions_" + currentRowNumber)
          'use the a5w_radiobuttons() helper function to create the html code for the radio buttons
          generateAnswerOptions = html 'set the function to the value ofthe html code we have just created
          end function

          Here is the javascript function I wrote (this is an event handler that is put inside the a5w_radiobuttons() helper function
          //this gets triggered by the onChange event of the freeform field that contains the radio button choices
          //it takes the value of the selected answer and puts it in the answer field

          function setanswer(RowNum) {
          var answer = $gvs('AnswerOptions_'+ RowNum);
          answer = $u.s.tran(answer,'\n',',');
          //call a function in here that looks up the ID and returns it

          There is some other stuff I do with this but it works pretty well. The issue I am having with it at the moment is my answers can be quite long and a) I cant figure out how to make the text wrap, I can break the words using a style attribute but not text wrap and b) if I use an html editor the formatting goes crazy from time to time. I've gone back to no html editor. If anyone has an answer for that I'd love to know I've played with style settings everywhere I can think to (except for in the helper function) and every style setting I can find.

          Good luck