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troyrowlands
Frequent Visitor

Referencing an image dynamically from a table

Hi All

 

I have a table which requires a lookup to get a text value that references an image. If I just type the image name text in the image control the correct image is shown. But if I build the text dynamically using a lookup, the image doesn't show. No error.

 

This results in no image

Image = LookUp(LeaveTypeCollections, type = ThisItem.type).icon 

 

This results in the correct image 

Image = vacation 

 

Using a text label

Text = LookUp(LeaveTypeCollections, type = ThisItem.type).icon

This shows vacation  in the label

 

So I am confused as to why the dynamic text doesn't result in the image being shown.

This is part of a gallery as well. Picture attached.Screenshot 2024-02-13 013019.png

1 ACCEPTED SOLUTION

Accepted Solutions
Amik
Super User
Super User

@troyrowlands - I am going to assume you did not follow my advice.

 

Regarding your variable - it is not possible to reference an object by it’s name string. As mentioned, you must reference the image name exactly as it appears in the Media pane in your app.

 

In other words, your set function should be:

 

Set(
    _imagelink,
    vacation
)

 

 


------------------------------------------------------------------------------------------------------------------------------


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Imran-Ami Khan

View solution in original post

6 REPLIES 6
Amik
Super User
Super User

@troyrowlands -

 

1. Are you certain that the "type" field is not returning blank?

2. What do you have in the Items property of your Gallery?

3. Could you share your Collection code?

 

I would expect the Collection to contain something along the lines of:

 

ClearCollect(
    LeaveTypeCollections,
    Table(
        {
            type: "Sick Leave",
            icon: SickLeave
        },
        {
            type: "Vacation",
            icon: Vacation
        }
    )
)

 

Note for the "icon" field, make sure you enter the file names exactly as they appear in the Media pane but exclude the image extension (e.g. png, jpeg). In the above example, the image names are SickLeave and Vacation.

 


------------------------------------------------------------------------------------------------------------------------------


If I have answered your question, please mark your post as Solved. Remember, you can accept more than one post as a solution.

If you like my response, please give it a Thumbs Up.

Imran-Ami Khan

Hi

 

I have changed things slightly to highlight my issue. My Items for the gallary is: LeaveTypeCollections which is a table (Not a collection) which a column called Icon. I am using ThisItem.Icon to reference the Icon colum of the table which returns 'vacation' for the TextLabel but doesn't set the Icon to the vacation.png in my media library. Setting the image property to 'vacation' manually shows the icon. So it seems to be a problem when referencing an image name from a table.

My Table (LeaveTypeCollection)

icon.png

1) Are you certain that the "type" field is not returning blank? 

Yes because I have 2 test items as per below. 1. Image and 1. text Label. The text label has the same formula as the 

dynamic image and displays the lookup text as "vacation". The test image I have just said "vacation", and the image appears. See below.

troyrowlands_0-1707809179708.png

 

 

 

 

2. What do you have in the Items property of your Gallery? - Items = It is now 'LeaveTypeCollections'

3. Could you share your Collection code? - I have converted the collections to a Dataverse table.

It just is not making sense. I must be missing something. I tried to convert the returned value to Text, but it made no difference. no difference.

Amik
Super User
Super User

@troyrowlands - I think you might be overcomplicating things.

 

If we have a Dataverse table with a Single Line Text column which references the name of an image, and the name exactly matches the file name as it appears in the Media pane in your app, but excludes the image extension (e.g. png, jpeg), then you can simply reference that image in your formula in the Image property of the Image control.

 

If we want to dynamically return an image based on the value in another field, we can apply Switch function against the Image property of your Image control:

 

Switch(
    ThisItem.type,
    "Bereavement",
    bereavement,
    "Floating Holiday",
    floating-holiday,
    "Sick Leave",
    sick-leave
)

 

Or we can create a Collection:

ClearCollect(
    colMyImageTable,
    Table(
        {
            Name: "Bereavement",
            img: bereavement
        },
        {
            Name: "Floating Holiday",
            img: floating-holiday
        },
        {
            Name: "Sick Leave",
            img: sick-leave
        }
    )
)

 

And then reference that Collection with a LookUp function (again, in the Image property of your Image control):

 

LookUp(
    colMyImageTable,
    Name = ThisItem.type,
    img
)

 


------------------------------------------------------------------------------------------------------------------------------


If I have answered your question, please mark your post as Solved. Remember, you can accept more than one post as a solution.

If you like my response, please give it a Thumbs Up.

Imran-Ami Khan

Hi Imran-Ami

 

I am going to simplify the issue as much as I can here. If I have an image control and I set the image property to vacation. The image displays the following:

troyrowlands_0-1708633696858.png

The image shows as expected:

troyrowlands_1-1708633733901.png

If I set a variable as the image text:

e.g. Set(_imagelink, "vacation") and then set the image property to the variable, e.g. (note the preview of the variable resolves to vacation as per expected)

troyrowlands_2-1708633914368.png

But the image refuses to display as per when the image name is directly entered.

troyrowlands_3-1708634014513.png

The label control next to it is set to the same variable as a test comparison..

It is very weird. I have tried with multiple images and always get the same result.

Any ideas?

 

Amik
Super User
Super User

@troyrowlands - I am going to assume you did not follow my advice.

 

Regarding your variable - it is not possible to reference an object by it’s name string. As mentioned, you must reference the image name exactly as it appears in the Media pane in your app.

 

In other words, your set function should be:

 

Set(
    _imagelink,
    vacation
)

 

 


------------------------------------------------------------------------------------------------------------------------------


If I have answered your question, please mark your post as Solved. Remember, you can accept more than one post as a solution.

If you like my response, please give it a Thumbs Up.

Imran-Ami Khan

Hi Imran-Ami

 

Thanks for the explanation. I was unable to get it to work using the lookup from a Dataverse table, but from a collection it does seem to work. Thanks for the assistance

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