With validation enabled for the blazor grid, once all the validation errors are resolved, the OnUpdate event should get fired but it is not. I checked in incell edit mode and it does gets fired but my requirement is to use the inline edit mode. Below is the code that I am using:
        <TelerikGrid Data="@gridData"
            Pageable="true"
            Sortable="true"
            Width="2500px"
            PageSize="50"
            FilterMode="GridFilterMode.FilterMenu"
            EditMode="GridEditMode.Inline"
            OnEdit = "@OnGridEdit"
            OnCancel="@OnGridCancel"
            OnUpdate="@OnGridUpdateHandler"
         >
        <GridSettings>
            <GridValidationSettings Enabled="true" />
        </GridSettings>
        <GridColumns>
            <GridColumn Field="@nameof(Dto.CNumber)" Title="Customer No." Width="100px" Filterable="true" Sortable="false" />
            <GridColumn Field="@nameof(Dto.DistributorLastName)" Title="Distributor Last Name" Width="200px" Filterable="true" />
            <GridColumn Field="@nameof(Dto.DistributorNumber)" Title="Distributor No." Width="120px" Filterable="false" Sortable="false" />
            <GridColumn Field="@nameof(Dto.DemoDate)" Title="Demo Date" Width="120px" Filterable="true" />
            <GridColumn Field="@nameof(Dto.SerialNumber)" Title="RX Serial No." Width="120px" Filterable="false" Sortable="false" />
            <GridCommandColumn Width="100px">
                    <GridCommandButton Command="Edit">Edit</GridCommandButton>
                        <GridCommandButton Command="Save" ShowInEdit="true">Save</GridCommandButton>
                    <GridCommandButton Command="Cancel" ShowInEdit="true">Cancel</GridCommandButton>
            </GridCommandColumn>
        </GridColumns>
        </TelerikGrid>