Perform validation across multiple cells during Save in Batch Edit using Syncfusion Blazor Data Grid

Minimal Repro (runnable)

https://blazorplayground.syncfusion.com/VNrIjvNbtiVkgpNo

Scenario

For each model, my grid displays two rows: "Time" and "Value".

Rule: If a user enters a value in the Time row for a given column (AM/PM), the corresponding Value row for that column must also have a value (and vice versa). If one is filled, both are required.

Requirements

I am using the Syncfusion Blazor DataGrid in batch edit mode and need to implement cross-cell validation (across rows, within the same column) with the following requirements:

1. Immediate cell-level validation during edit (already working via custom validator).

    

2. Cross-cell validation during Save: If multiple cells fail validation, all must be highlighted and show error tooltips.

   

3. If validation fails, block Save and scroll to the first invalid cell.

What I Have Tried (and Workaround)

• Immediate cell-level validation is handled in a custom validator (works fine as seen above).
• On "Save" button click, I merge batch changes and run cross-cell validation logic.
• If errors are found, I try to set validation errors on the cells using a method like:

  public void SetValidationError(GridRowViewModelV2 row, string fieldName, string message)
  {
     var fieldIdentifier = new FieldIdentifier(row, fieldName);
     messageStore.Add(fieldIdentifier, message);
     context.ShowValidationMessage(fieldName, false, message);
  }
  

  • This successfully shows the error message but has couple problems

    

  • This only works if the cell is selected when I click "Save". If cells are not selected, this has no effect.

  • This messes up validation on the grid because the fieldIdentifier created in this method won't match with FieldIdentifier passed in the CurrentEditContext.OnFieldChanged handler in the cell-level custom validator, so the error message cannot be cleared by the cell-level validator when the user fixes the issue.

• (Workaround) I just use the error messages from cross-cell validation logic in a toast notification and block save but this is a hacky approach and would rather avoid this.

Is there a better way to do this?

Can this be done?

• When user hits "Save", collect all the grid cell locations (using column and row indexes) where the error occurred
• Highlight those cells with error message in the cell's tooltip
• Scroll to the errored-out cells and focus on the first errored out cell
• When user enters correct value in the cell, clear the error message and error highlighting