topic Re: Display text unless null, if null display text of next attribute colum in ArcGIS JavaScript Maps SDK Questions

Display text unless null, if null display text of next attribute colum

RickeyFight — Fri, 10 Oct 2014 21:33:32 GMT

I have trail data.

I want to show map tips if the trail has a name.

Unfortunately, I cannot change the data. I want the Name to be displayed. If Name is Null then displayed the Group_ field if not the group then Route_2 and if not Route_2 then Route_1

My code right now looks like this:

dojo.connect(Layer, "onMouseMove", function (evt) {

if (evt.graphic) {

if (evt.graphic.attributes) {

ShowMapTip(evt, "Name: " + evt.graphic.attributes.NAME );

}

});

dojo.connect(Layer, "onMouseOut", CloseMapTip);

Any suggestions would be greatly appreciated!

Re: Display text unless null, if null display text of next attribute colum

SteveCole — Fri, 10 Oct 2014 22:28:43 GMT

How about something like....

if (evt.graphic.attributes) {

var theString;

if(!evt.graphic.attributes.NAME) {

theString = "Name: " + evt.graphic.attributes.NAME;

} else if (!evt.graphic.attributes.GROUP_) {

theString = "Name: " + evt.graphic.attributes.GROUP_;

} else if (!evt.graphic.attributes.ROUTE_2) {

theString = "Name: " + evt.graphic.attributes.ROUTE_2;

} else {

theString = "Name: " + evt.graphic.attributes.ROUTE_1;

}

ShowMapTip(evt, theString);

}

Re: Display text unless null, if null display text of next attribute colum

RickeyFight — Mon, 13 Oct 2014 13:52:03 GMT

Thank you for the quick response!

I changed the code slightly (bold numbers) to see why it was not working correctly. The trails with NAME's displayed with a label of Name4. Every other trail had a label of Name4 but nothing after that. I am not sure why it is pull the label of the last option.

if (evt.graphic.attributes) {

var theString;

if(!evt.graphic.attributes.NAME) {

theString = "Name1: " + evt.graphic.attributes.NAME;

} else if (!evt.graphic.attributes.GROUP_) {

theString = "Name2: " + evt.graphic.attributes.GROUP_;

} else if (!evt.graphic.attributes.ROUTE_2) {

theString = "Name3: " + evt.graphic.attributes.ROUTE_2;

} else {

theString = "Name4: " + evt.graphic.attributes.ROUTE_1;

}

ShowMapTip(evt, theString);

}

Re: Display text unless null, if null display text of next attribute colum

SteveCole — Mon, 13 Oct 2014 14:59:35 GMT

Maybe there's an issue with your fields being blank vs NULL; hard to say from my end on the outside. Let's try evaluating your field values another way, Let's look at the length of the field's value.:

if (evt.graphic.attributes) {

var theString;

if(evt.graphic.attributes.NAME.length > 0) {

theString = "Name1: " + evt.graphic.attributes.NAME;

} else if (evt.graphic.attributes.GROUP_.length > 0) {

theString = "Name2: " + evt.graphic.attributes.GROUP_;

} else if (evt.graphic.attributes.ROUTE_2.length > 0) {

theString = "Name3: " + evt.graphic.attributes.ROUTE_2;

} else {

theString = "Name4: " + evt.graphic.attributes.ROUTE_1;

}

ShowMapTip(evt, theString);

}

Re: Display text unless null, if null display text of next attribute colum

RickeyFight — Mon, 13 Oct 2014 15:23:26 GMT

Thank you!

The only thing i changed was the 0 to 1 and it worked! (in bold below)

if (evt.graphic.attributes) {

var theString;

if(evt.graphic.attributes.NAME.length > 1) {

theString = "Name1: " + evt.graphic.attributes.NAME;

} else if (evt.graphic.attributes.GROUP_.length > 1) {

theString = "Name2: " + evt.graphic.attributes.GROUP_;

} else if (evt.graphic.attributes.ROUTE_2.length > 1) {

theString = "Name3: " + evt.graphic.attributes.ROUTE_2;

} else {

theString = "Name4: " + evt.graphic.attributes.ROUTE_1;

}

ShowMapTip(evt, theString);

}

Display text unless null, if null display text of next attribute colum