topic How to delete line ? in ArcGIS JavaScript Maps SDK Questions

How to delete line ?

zeeshanbhatti — Wed, 24 Nov 2010 06:21:09 GMT

i am drawing line using this code reference from

http://help.arcgis.com/en/webapi/javascript/arcgis/help/jsapi_start.htm

var myLine ={geometry:{"paths":[[[-91.40625,6.328125],[6.328125,19.3359375]]],
"spatialReference":{"wkid":4326}},
"symbol":{"color":[0,0,0,255],"width":1,"type":"esriSLS","style":"esriSLSSolid"}};
var gra= new esri.Graphic(myLine);
map.graphics.add(gra);

How can i delete the line if i am trying to draw in above mention way.
The samples for deleting graphics method is not clear if we are drawing using inputs parameters. Can some one help us through code.

Re: How to delete line ?

timgogl — Sat, 11 Dec 2021 06:05:26 GMT

i dont know of a delete function for objects in javascript, but you might try:

var gra= new esri.Graphic(myLine);
map.graphics.add(gra);

gra.hide(); // hide the graphic
gra=null;

setting it to null 'should' let the js engine know that the object is available for garbage collection, whether it gets collected or not.. who knows.

Re: How to delete line ?

timgogl — Wed, 24 Nov 2010 15:20:22 GMT

well, this is why i like to read through the forums here, i get to learn new things....

looking at this post: http://forums.arcgis.com/threads/17871-Trouble-with-routing?p=57167&posted=1#post57167

i noticed this user using a remove() method on a graphics object.... so that maybe what you need to use.

heh. ah.. just found the documentation, its under GraphicsLayer, not graphics.

http://help.arcgis.com/EN/webapi/javascript/arcgis/help/jsapi_start.htm

Re: How to delete line ?

JohnFreels — Thu, 09 Dec 2010 16:39:51 GMT

You could use the Map.Graphics layer for drawing. That's what I do. Call 'map.graphics.clear()' to get rid of them to clear the interface or for redrawing.

Could this solution work for you?

Re: How to delete line ?

zeeshanbhatti — Thu, 09 Dec 2010 17:52:54 GMT

Well i have solved it .I have declared a global array and pushed all the graphic retreived from database along with unique ID. Then i have removed the desired graphic by using Map.Graphic.Remove(graphic_Line[Id]). Method. And it works for me.

Thanks to All

Regards,
Zeeshan