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MagnusGöransson
Kudo Collector
Kudo Collector

Uploading images to SharePoint list without using Flow

Hello,

This is probably already known to you, but I learned about it yesterday so someone else migth as well find the method useful.

Problem: Taking a photo using the camera in a canvas app normally means that you must use a Flow to upload the photo to SharePoint.

Problem 2: When displaying photos from SharePoint in a canvas app most of the times means that the photo is loaded directly from SharePoint and not bu using the SharePoint connector which gives you permissions related errors in some cases.

Solution:

A really simple app with one Image Upload and one Button

 

The OnSelect code for the Button

Set(ImageBinaryRaw, JSON(UploadedImage1.Image , IncludeBinaryData));
Set(ImageBinary,Mid(ImageBinaryRaw, Find(",", ImageBinaryRaw)+1, Len(ImageBinaryRaw)-Find(",", ImageBinaryRaw)-1));
Patch(ImageUploadTest,Defaults(ImageUploadTest),{Title:"Test", Base64Image: ImageBinary});
Reset(AddMediaButton1)

 

This is what the SharePoint list looks like: 

 

image3.JPG

image2.JPG

This is the result screen:

 

image4.JPG

Its a gallery with an image control. The code for the image control:

 

"data:image/jpg;base64," & ThisItem.Base64Image

 

Quite simple! 🙂

 

24 REPLIES 24

I've actually figured it out! I split the data into two sources. 1) My primary data source that my gallery references, and 2) a data source that houses the base64 image data.

I then use a Lookup function to retrieve the corresponding records in both my primary and secondary data sources to store the data for the images. The gallery now loads quickly as it's not trying to parse columns with giant text strings, and the lookup function appears to retrieve the image data for the correct record very quickly and display the correct thumbnails. (I've created 300 records in my image data source list each with 10 columns of base64 data and so far so good. It was necessary to hide the base64 Image columns in my SharePoint list so the list would load in SharePoint). This is a very basic explanation, but if you or any other forum member wants me to elaborate I'd be happy to. I understand you're using an attachment field now, but for my use case this wasn't practical.

@cfebvre  please elaborate

Hi @ACCDEVACC,

 

Here's the full solution. For extra context, you can read my other forum post about this subject here:

https://powerusers.microsoft.com/t5/Building-Power-Apps/What-is-the-BEST-way-to-upload-images-to-a-S...

 

Okay, I believe I've finally worked it out. I've tested it pretty extensively now and I think I have it.

 

There's a bit involved, so I will take everyone through step by step.

Thanks to user MagnusGöransson who gave me the original inspiration for this idea from this forum post:

https://powerusers.microsoft.com/t5/Building-Power-Apps/Uploading-images-to-SharePoint-list-without-...

 

Step 1) Split your datasources

 

The primary issue with Magnus's method was that attempting to store all that base64 data into a single data source meant that loading it in a gallery (in PowerApps) was impossible. The gallery just wouldn't load if you had 30+ items in your datasource with base64 strings in each item.

 

For this example I'll assume everything in your app comes from 1 primary datasource that contains everything. What you will need to do is split your datasource so that your Base64 string column is housed in it's own datasource, while everything else is in your primary datasource (text columns, choice columns etc).

 

Your secondary image datasource will look like this:

 

Your Title column should be a signle line of text column that contains a digit that mirrors your primary datasource ID column. Your Base64 columns are Multiline text columns.Your Title column should be a signle line of text column that contains a digit that mirrors your primary datasource ID column. Your Base64 columns are Multiline text columns.

 

Your Title column should be a single line of text column that contains a digit that mirrors your primary datasource ID column. Your Base64 columns are Multiline text columns.

 

Step 2) Hide your Base64 columns in Sharepoint

 

Once you have determined how many images you will need to store per form item in your app ( I need to store up to ten images per form item), and created that amount of columns in your secondary datasource, it will be necessary to hide those columns in your secondary datasource. If you don't hide them, the Sharepoint list won't load when you try to navigate to it in Sharepoint.

 

Step 3) Load both your datasources into PowerApps

If you haven't got one already, you'll need a custom card in your form, with an Add Image Control for each image.

 

*You'll also need a view only Datacard in your form that refers to the ID of the item in question*

Mine is called 'TextIDFormTextField'

 

It will look something like this:

Note the naming conventions of controls in the sidebar, and insert your own labels in the formula.Note the naming conventions of controls in the sidebar, and insert your own labels in the formula.

 

 

Step 4) Use this formula

 

 

 

Set(ImageBinaryRaw, JSON(Image001Thumbnail.Image , IncludeBinaryData));
Set(ImageBinary,Mid(ImageBinaryRaw, Find(",", ImageBinaryRaw)+1, Len(ImageBinaryRaw)-Find(",", ImageBinaryRaw)-1));
Patch(ImageListExample, LookUp(ImageListExample, Title = TextIDFormTextField.Text) ,{Image001: Concatenate("data:image/jpg;base64,", ImageBinary)});

 

 

 

 

You'll need to replace 'Image001Thumbnail' (Grey Thumbnail box in screenshot above) and 'ImageListExample' (Secondary Datasource). Please note: the forum doesn't like the 'data:image' string in the formula above, refer to screenshot ^^

 

Step 5) What the heck does this do, exactly?

Okay, so what this formula does is it looks up the secondary datasoucre and finds the item whose 'Title' column matches the ID of the primary data source list item. Then it patches the Base64 data into the appropriate Base64 column of the found item in the secondary data source.

 

Step 6) Viewable Thumbnails

The last step to ensure you've got this working right (and to give visual feedback to the end user that they've stored the image and can look at it again any time they open the item in question), is to have the thumbnail display the correct image.

Use this formula:

 

 

 

If(IsBlank(Image001AddButton.Media), LookUp(ImageListExample, Title = TextIDFormTextField.Text, Image001), Image001AddButton.Media)

 

 

 

 

Here we are once again looking up the secondary data source, cross-referencing the ID of the primary list item with the Title of the secondary list item, then pulling in the Base64 string into the thumb. 

 

And Voila, it works:

 

Yes, I am a massive nerd.Yes, I am a massive nerd.

 

EDIT: I should mention that this means when you load your primary datasource into a gallery in your PowerApp, it will not try to load the Base64 column from the secondary datasource. This load will only occur when you open the item in question, and so far, the LookUp function seems to load image thumbs quickly. I've tried with 500+ items, each with base64 strings, and haven't encountered any serious clunkiness.

mgudites
Frequent Visitor

THANK YOU

 

After hours of exhaustive searching and trial & error, this is the first tutorial I've found that actually WORKS. 🎉

You are welcome 🙂

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