# Referencing Template Canvas Parameters in Expressions

**URL:** <https://forum.inductiveautomation.com/t/referencing-template-canvas-parameters-in-expressions/111408>\
**Category:** Ignition\
**Tags:** vision\
**Created:** [October 13, 2025, 7:06pm UTC](https://forum.inductiveautomation.com/t/referencing-template-canvas-parameters-in-expressions/111408 "2025-10-13T19:06:43Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![derick.haifley](https://avatars.discourse-cdn.com/v4/letter/d/439d5e/32.png) [@derick.haifley](https://forum.inductiveautomation.com/u/derick.haifley)\
**Post date:** [October 13, 2025, 7:06pm UTC](https://forum.inductiveautomation.com/t/referencing-template-canvas-parameters-in-expressions/111408/1 "2025-10-13T19:06:43Z")

</div>

Here’s a breakdown of what I have:

Ignition Version: 8.1

Module: Vision

A Template Canvas with Templates that each have Custom Properties assigned to them. I understand these Custom Properties are saved in the Parameters field of the Canvas’s Templates Dataset.

I am trying to reference these Custom Properties in an Expression binding but I cannot seem to figure out how. I can correctly reference the entire Parameters field in the Templates dataset, but I can’t seem to figure out how to reference any of the individual Parameters within it.

In my Expression, I can get to the Parameters using:

> {Root Container.Path.to.Template.Canvas.templates}[0,”parameters”]

Which results in something like:

> {"property1":"value1","property2":"value2"}

But how do I reference the properties within that string?

I can sort of make it work by running the Parameters string through a mix of split and replace functions, but I feel like there’s got to be a simpler way to do it.

Is there an easy way to do this?

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<div class="post-metadata">

**Author:** ![ryan.white](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/ryan.white/32/73193_2.png) [@ryan.white](https://forum.inductiveautomation.com/u/ryan.white)\
**Post date:** [October 13, 2025, 7:11pm UTC](https://forum.inductiveautomation.com/t/referencing-template-canvas-parameters-in-expressions/111408/2 "2025-10-13T19:11:00Z")

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Looks like its a json string, have you tried using [`jsonGet`](https://www.docs.inductiveautomation.com/docs/8.1/appendix/expression-functions/JSON/jsonGet)?

eg:

```python
jsonGet(
    {Root Container.Path.to.Template.Canvas.templates}[0,”parameters”],
    "property1"
)

```

It looks like you posted your code as quote blocks, use preformatted text instead, see [Wiki - how to post code on this forum](https://forum.inductiveautomation.com/t/wiki-how-to-post-code-on-this-forum/77831).

---

<div class="post-metadata">

**Author:** ![derick.haifley](https://avatars.discourse-cdn.com/v4/letter/d/439d5e/32.png) [@derick.haifley](https://forum.inductiveautomation.com/u/derick.haifley)\
**Post date:** [October 13, 2025, 7:14pm UTC](https://forum.inductiveautomation.com/t/referencing-template-canvas-parameters-in-expressions/111408/3 "2025-10-13T19:14:57Z")

</div>

Well, that was it….

Funny thing is, I saw jsonGet in the Expression binding documentation but the syntax looked a little different and so I never tried it. Or maybe that was getCSV. Either way, this worked! Thank you so very much!