EditTemplate
? <EditTemplate>
<Validation>
<TextEdit Text=@((string)context.CellValue) TextChanged=@(x => context.CellValue = x)>
<Feedback><Blazorise.ValidationError /></Feedback>
</TextEdit>
</Validation>
</EditTemplate>
<EditTemplate>
<Validation>
<TextEdit Text=@((string)context.CellValue) TextChanged=@(x => context.CellValue = x) TextExpression="@(()=>context.Item.FirstName)">
<Feedback><Blazorise.ValidationError /></Feedback>
</TextEdit>
</Validation>
</EditTemplate>
TextExpression="@(()=>context.Item.FirstName)"
will target the wrong model
<Validation Validator="ValidationRule.IsNotEmpty">
DataGrid.ValidationItem
and then it will be possible