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Anonymous
Not applicable

How to display Base 64 PNG images from a database

Hello,

 

I have created a Power App which has a signature field. I want to be able to bring the signature image into the Report Builder.

 

The image is in Base64 format stored on Sharepoint. I have created a Power BI report and used this as my datasource for report builder. I successfully displayed the signature image in a Power BI table in this format but cannot bring it into the Report Builder. Here is an example of the binary image.

 

data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAV4AAACWCAYAAACW5+B3AAAEyklEQVR4Xu3UwQkAAAgDMbv/0m ...

 

Settings used when inserting the image:

 

I have selected the image source as -  'Database'

 

Use this field -  '=First(Fields!Delivery_Signature.Value, "DataSet")' 

 

Use this MIME type - 'image/png.'

 

When I run the report the image is only shown as a red 'x' in the top left hand corner.

 

Any help would be greatly appreciated. Thank you

1 ACCEPTED SOLUTION

I have double check with my data. Actually you don't need to convert it. What I realized is this portion "data:image/png;base64," or similar definition is not exist in my data. May be removing this part from data will solve your problem.

 

=Replace(First(Fields!Delivery_Signature.Value, "DataSet"),"data:image/png;base64,","")

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5 REPLIES 5
Markzolotoy
Super User
Super User

Can you please provide detail about the data source you are using in your paginated report?

saglamtimur
Resolver II
Resolver II

Try converting it like;

 

=Convert.FromBase64String(Fields!Delivery_Signature.Value)

 

Anonymous
Not applicable

I used the suggested formula with an aggregate function but the image is not displaying. Is there something wrong with the formula I used?

 

=First(Convert.FromBase64String(Fields!Delivery_Signature.Value),"DataSet")

 

Francis4268_1-1592989033442.png

 

 

I have double check with my data. Actually you don't need to convert it. What I realized is this portion "data:image/png;base64," or similar definition is not exist in my data. May be removing this part from data will solve your problem.

 

=Replace(First(Fields!Delivery_Signature.Value, "DataSet"),"data:image/png;base64,","")

Anonymous
Not applicable

I removed the prefix 'data:image/png;base64,' from the Power BI Datasource and it is working.

 

I presume the option choose 'MIME type' reomves the need for the prefix in the binary image where Power BI will automatically select the image type.

 

Thanks for the help.

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