topic HTML+JS: how display raster field in InfoWindow in ArcGIS JavaScript Maps SDK Questions

HTML+JS: how display raster field in InfoWindow

AlekseyShulga — Mon, 15 Dec 2014 12:48:56 GMT

Hello,

How can I do it?

In context of InfoWindow

not work...

ReneRubalcava — Mon, 15 Dec 2014 14:45:55 GMT

What is the value of the "Photo" field? Is it a url? Is it a base64 encoded string?

If you could provide a sample that may help.

AlekseyShulga — Tue, 16 Dec 2014 13:05:06 GMT

no, it is type "Raster" in ArcGIS.

AlekseyShulga — Wed, 17 Dec 2014 07:18:40 GMT

in the REST I see this field as esriFieldTypeBlob. I found sample:

but image not display

OwenEarley — Wed, 17 Dec 2014 07:48:28 GMT

You would need to convert your raster Blob data to base64 before you apply it to the image src as Rene suggests.

Using the HTML5 canvas object will have compatibility issues with older browsers.

Encoding the Blob to base64 server-side is relatively simple but it looks like you need to do this on the client.

AlekseyShulga — Wed, 17 Dec 2014 08:01:48 GMT

I read this post How to read FieldTypeBlob from graphic.attributes and I try this, but image not display (I wrote this above)

AlekseyShulga — Wed, 17 Dec 2014 08:56:15 GMT

May be I define dojox incorect?

require([..., "dojox/encoding/base64", ...],

function (..., base64, ...) {}

AlekseyShulga — Wed, 17 Dec 2014 09:39:18 GMT

Oh, no... I was wrong... field type is esriFieldTypeRaster