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Validation on a Select component - Blazor UI #1025


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Leonardo.Willrich created
  • ABP Framework version: v4.2.2
  • UI type: Blazor
  • DB provider: EF Core
  • Tiered (MVC) or Identity Server Separated (Angular): yes / no
  • Exception message and stack trace:
  • Steps to reproduce the issue:

Hi,

I have a modal with some fields SELECT. The first item is just a generic item to message the user to select an option. Those fields are required, I don't want leave the user save the modal with some not selected field. How can I do that? I've tried play with Validation component, but it doesn't work.

Here one of my SELECT code:

<Select TValue="int" @bind-SelectedValue="@NewEntity.NetworkTypeId">
    <SelectItem TValue="int" Value="0">@L["SupplyNetwork:SelectNetworkType"]</SelectItem>
    @foreach (var network in networkTypeList)
    {
        <SelectItem TValue="int" Value="@network.Id">
            @network.Name
        </SelectItem>
    }
</Select>

5 Answer(s)
  • User Avatar
    0
    mladen.macanovic created

    You need to wrap Select with validations and use Feedback element.

    <Validation>
        <Select TValue="int" @bind-SelectedValue="@NewEntity.NetworkTypeId">
            <SelectItem TValue="int" Value="0">@L["SupplyNetwork:SelectNetworkType"]</SelectItem>
            @foreach ( var network in networkTypeList )
            {
                <SelectItem TValue="int" Value="@network.Id">
                    @network.Name
                </SelectItem>
            }
            <Feedback>
                <ValidationError />
            </Feedback>
        </Select>
    </Validation>
    

    Also, don't forget to read Blazorise documentation for reference.

  • User Avatar
    0
    Leonardo.Willrich created

    Hi,

    The code above doesn't work. I had to add the <ChildContent> markup for the <SelectItem> loop. See below:

    <Validation>
        <Field>
            <Row>
                <Column ColumnSize="ColumnSize.Is5">
                    <FieldLabel>@L["SupplyNetwork:NetworkType"]</FieldLabel>
                </Column>
                <Column ColumnSize="ColumnSize.Is7">
                    <Select TValue="int" @bind-SelectedValue="@EditingEntity.NetworkTypeId">
                        <ChildContent>
                            <SelectItem TValue="int" Value="0">@L["SupplyNetwork:SelectNetworkType"]</SelectItem>
                            @foreach (var network in networkTypeList)
                            {
                                <SelectItem TValue="int" Value="@network.Id">
                                    @network.Name
                                </SelectItem>
                            }
                        </ChildContent>
                        <Feedback>
                            <ValidationError />
                        </Feedback>
                    </Select>
                </Column>
            </Row>
        </Field>
    </Validation>
    

    Regarding the documatation, I am trying my best with that. I haven't seen nothing about Validation in ABP Framework or ABP Commercial documents and I've found something in Blasorise documentation, however, I haven't found any example for <SELECT>. Can you please refer where I would be found that?

  • User Avatar
    0
    mladen.macanovic created

    You can disable a save button by listening for validations status changed

    <Validations Mode="ValidationMode.Auto" StatusChanged="@OnValidationsStatusChanged">
       <Validation>
            <Field>
                <Row>
                    <Column ColumnSize="ColumnSize.Is5">
                        <FieldLabel>@L["SupplyNetwork:NetworkType"]</FieldLabel>
                    </Column>
                    <Column ColumnSize="ColumnSize.Is7">
                        <Select TValue="int" @bind-SelectedValue="@EditingEntity.NetworkTypeId">
                            <ChildContent>
                                <SelectItem TValue="int" Value="0">@L["SupplyNetwork:SelectNetworkType"]</SelectItem>
                                @foreach ( var network in networkTypeList )
                                {
                                    <SelectItem TValue="int" Value="@network.Id">
                                        @network.Name
                                    </SelectItem>
                                }
                            </ChildContent>
                            <Feedback>
                                <ValidationError />
                            </Feedback>
                        </Select>
                    </Column>
                </Row>
            </Field>
        </Validation>
    </Validations>
    
    <Button Color="Color.Primary" Disabled="@saveDisabled">Save</Button>
    
    @code{
        Task OnValidationsStatusChanged( ValidationsStatusChangedEventArgs eventArgs )
        {
            saveDisabled = eventArgs.Status == ValidationStatus.Error;
    
            return Task.CompletedTask;
        }
    
        bool saveDisabled;
    }
    
  • User Avatar
    0
    mladen.macanovic created

    Also I see you using Row and Column for horizontal form field. While that can work it is best to go with native approach. eg. with FieldLabel and FieldBody

    <Field Horizontal="true">
        <FieldLabel ColumnSize="ColumnSize.IsFull.OnTablet.Is2.OnDesktop">Full Name</FieldLabel>
        <FieldBody ColumnSize="ColumnSize.IsFull.OnTablet.Is10.OnDesktop">
            <TextEdit Autofocus="true" Placeholder="First and last name">
                <Feedback>
                    <ValidationError>Enter full name!</ValidationError>
                </Feedback>
            </TextEdit>
        </FieldBody>
    </Field>
    
  • User Avatar
    0
    Leonardo.Willrich created

    That is great. Thank you for sharing that.

Made with ❤️ on ABP v9.1.0-preview. Updated on December 02, 2024, 12:35