Gremlin/Gremlin_BlazorServer/Pages/Accounts.razor

@page "/Accounts"
@using Gremlin_BlazorServer.Services
@using Gremlin_BlazorServer.Data.EntityClasses
@using System.Security.Claims
@using System.Text;

@inject GenericController genericController
@inject GenericImporter genericImporter

<AuthorizeView>
    <Authorized Context="Auth">
        <h1>Accounts</h1>
        <Field>
            <FieldLabel>Import Accounts</FieldLabel>
            <FileEdit Filter=".csv" Changed="@OnImportAccounts" />
        </Field>
        @*<Button Color="Color.Primary" Clicked="@OnImportAccounts" Loading="@isImportingAccounts">Import Accounts</Button>*@
        <DataGrid TItem="Account"
                    Data="@accounts"
                    SelectedRow="@selectedAccount"
                    SelectedRowChanged="@OnSelectedAccountChanged"
                    CommandMode="DataGridCommandMode.ButtonRow"
                    EditMode="DataGridEditMode.Popup"
                    UseValidation Narrow Editable ShowPager Bordered Hoverable Sortable Filterable Striped Responsive FixedHeader>

            <DataGridColumns>
                <DataGridCommandColumn NewCommandAllowed="false" EditCommandAllowed="false" DeleteCommandAllowed="false">
                    <SaveCommandTemplate>
                        <Button ElementId="btnSave" Type="ButtonType.Submit" PreventDefaultOnSubmit Color="Color.Primary" Clicked="@context.Clicked">@context.LocalizationString</Button>
                    </SaveCommandTemplate>
                    <CancelCommandTemplate>
                        <Button ElementId="btnCancel" Color="Color.Secondary" Clicked="@context.Clicked">@context.LocalizationString</Button>
                    </CancelCommandTemplate>
                </DataGridCommandColumn>

                <DataGridColumn Field="@nameof(Account.AccountId)" Caption="#" Filterable Sortable Editable>
                    <EditTemplate>
                        <NumericEdit TValue="uint" Value="@(Convert.ToUInt32(context.CellValue))" ValueChanged="@(v => context.CellValue = v)"/>
                    </EditTemplate>
                </DataGridColumn>
                <DataGridColumn Field="@nameof(Account.AccountName)" Caption="AccountName" Filterable Sortable Editable/>
                <DataGridColumn Field="@nameof(Account.Street)" Caption="Street" Filterable Sortable Editable/>
                <DataGridColumn Field="@nameof(Account.Zip)" Caption="Zip" Filterable Sortable Editable>
                    <EditTemplate>
                        <NumericEdit TValue="uint" Value="@(Convert.ToUInt32(context.CellValue))" ValueChanged="@(v => context.CellValue = v)"/>
                    </EditTemplate>
                </DataGridColumn>
                <DataGridColumn Field="@nameof(Account.City)" Caption="City" Filterable Sortable Editable/>
                <DataGridColumn Field="@nameof(Account.SapAccountNumber)" Caption="SapAccountNumber" Filterable Sortable Editable>
                    <EditTemplate>
                        <NumericEdit TValue="uint" Value="@(Convert.ToUInt32(context.CellValue))" ValueChanged="@(v => context.CellValue = v)"/>
                    </EditTemplate>
                </DataGridColumn>
            </DataGridColumns>

            <ButtonRowTemplate>
                <Button Color="Color.Success" Clicked="context.NewCommand.Clicked">New</Button>
                <Button Color="Color.Primary" Disabled="selectedAccount is null" Clicked="context.EditCommand.Clicked">Edit</Button>
                <Button Color="Color.Danger" Disabled="selectedAccount is null" Clicked="context.DeleteCommand.Clicked">Delete</Button>
                <Button Color="Color.Secondary" Clicked="context.ClearFilterCommand.Clicked">Clear Filter</Button>
            </ButtonRowTemplate>
        </DataGrid>

        @if (selectedAccount != null) {
            <h2>Contacts in @selectedAccount.AccountName</h2>
            <DataGrid TItem="Contact" Data="@selectedAccount.Contacts" UseValidation Narrow FixedHeader Editable ShowPager Bordered Hoverable Sortable Filterable Striped Responsive>
                <DataGridCommandColumn/>
                <DataGridColumn Field="@nameof(Contact.ContactId)" Caption="ContactId" Filterable Sortable Editable/>
                <DataGridColumn Field="@nameof(Contact.LastName)" Caption="LastName" Filterable Sortable Editable/>
                <DataGridColumn Field="@nameof(Contact.FirstName)" Caption="FirstName" Filterable Sortable Editable/>
                <DataGridColumn Field="@nameof(Contact.Gender)" Caption="Gender" Filterable Sortable Editable/>
                <DataGridColumn Field="@nameof(Contact.EMail)" Caption="EMail" Filterable Sortable Editable/>
            </DataGrid>
        }
    </Authorized>
    <NotAuthorized>
        <h3>Authentication Failure!</h3>
        <p>You're not signed in. Please click on the upper right to either register or log in.</p>
    </NotAuthorized>
</AuthorizeView>

@code {

    [CascadingParameter]
    private Task<AuthenticationState>? authenticationStateTask { get; set; }

    private IList<Account>? accounts;
    private Account? selectedAccount;
    private bool isImportingAccounts;

    protected override async Task OnInitializedAsync() {
        if (authenticationStateTask != null) {
            ClaimsPrincipal user = (await authenticationStateTask).User;

            if (user.Identity is {IsAuthenticated: true }) {
                accounts = genericController.GetAll<Account>();
            }
        }
    }

    private void OnSelectedAccountChanged(Account sA) {
        selectedAccount = sA;
        selectedAccount.Contacts = genericController.GetAll<Contact>(c => c.AccountId == selectedAccount.AccountId);
    }

    private async Task OnImportAccounts(FileChangedEventArgs fileChangedEventArgs) {
        isImportingAccounts = true;
        try
        {
            foreach (IFileEntry? file in fileChangedEventArgs.Files)
            {
                using MemoryStream stream = new();
                await file.WriteToStreamAsync(stream);
                stream.Seek(0, SeekOrigin.Begin);
                using StreamReader reader = new(stream);
                string fileContent = await reader.ReadToEndAsync();
                bool success = await genericImporter.ImportCsvAsync<Account>(fileContent);
            }
        }
        catch (Exception exception)
        {
            Console.WriteLine(exception.Message);
        }
        Console.WriteLine("Account import successfull");
        isImportingAccounts = false;
        StateHasChanged();
        return;
    }

}