topic Re: How to loop through individual graphics and show only a selected group in ArcGIS JavaScript Maps SDK Questions

How to loop through individual graphics and show only a selected group

PhoebeMcNeally — Thu, 13 Sep 2012 21:49:04 GMT

My goal is to loop through the results of a query task and return only the graphics that match the returned query records.

I have created a query task that queries a table and returns the matching set of results. I then created a graphics layers with attributes from a points feature class. So I now have to arrays that I need to loop through and only show the points that are in both. I am using graphics since variations of this query will be repeated many times. My show results function is working except it only returns the first matched individual graphic and not the whole set. Just started developing again and am probably missing something very basic.

My code is:

// Function to show the shots that were returned in the table query (attached to graphics)
      function showResults(results) {

       dojo.forEach(results.features, function (resultsFeature) {
    dojo.forEach(shotLayer.graphics, function (shotLayerGraphic) {

     if (resultsFeature.attributes.LOC == shotLayerGraphic.attributes.Path) {
      shot.show();
           alert("test"+ resultsFeature.attributes.LOC "and" + shotLayerGraphic.attributes.Path);
     }
    });


    });
}

The alert lets me know that it is cycling through correctly, but shot.show(); only displays one point.

My graphics layer is shotLayer and the individual graphics is the shot variable (both declared globally)

Any help would be greatly appreciated

Re: How to loop through individual graphics and show only a selected group

StephenLead — Sat, 11 Dec 2021 15:10:18 GMT

My graphics layer is shotLayer and the individual graphics is the shot variable (both declared globally)

When you post a code sample, it helps if you can use the Code tags (the # at the top right of the editor) so the formatting isn't stripped out.

/ Function to show the shots that were returned in the table query (attached to graphics)
function showResults(results) {

     dojo.forEach(results.features, function (resultsFeature) {
             dojo.forEach(shotLayer.graphics, function (shotLayerGraphic) {
                 
                    if (resultsFeature.attributes.LOC == shotLayerGraphic.attributes.Path) {
                        shot.show();
                 alert("test"+ resultsFeature.attributes.LOC "and" + shotLayerGraphic.attributes.Path);
                    } 
                });
             });
        }

It looks as if you're not re-setting "shot", so the same feature is being displayed at each iteration of the loop.

Cheers,
Steve

Re: How to loop through individual graphics and show only a selected group

PhoebeMcNeally — Thu, 13 Sep 2012 22:16:21 GMT

Thanks Steve for the code suggestion, I'll make sure to post it that way next time.

Given my newness, I don't know how to reset the Shot.show();

When using the dojo.forEach can you loop through it using shot.show like you would with a for loop?

Thanks for your help

Re: How to loop through individual graphics and show only a selected group

StephenLead — Thu, 13 Sep 2012 22:27:41 GMT

Can you include the full code (perhaps as a zipped attachment), or point us to the live site somewhere?