Enterprise-level component library based on Bootstrap and Blazor
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ValidateForm

Form components that can be used for data compliance checks

Data compliance checks are automatically performed when components placed in the ValidateForm are submitted

Demo

Introduction

  • ValidateForm component supports asynchronous setting of Model values
  • The form event is for OnValidSubmit OnInvalidSubmit
  • Model parameter is required is not allowed to be empty
  • Multiple buttons can be placed within the form to set whether the ButtonType='ButtonType.Submit' parameter is submitted to the form
  • The client authentication mechanism supports the model's Required label, setting the default English prompt information when not set by setting the ErrorMessage parameter prompt
  • The form checks by default whether the binding field values within the form are legitimate, and you can set the ValidateAllProperties property value to true if you need to check all fields in the model
  • Set the asynchronous submission form by setting the value of the Button Button property IsAsync
  • After the value of the component control in the form is modified, the OnFieldChanged method is called

Note:

  • Components within a form are typically used to bind the property values of Model in both directions using bidirectional binding techniques, causing the component to refresh and re-render when its value changes StateHasChanged, and the method is called, i.e. its component or page is refreshed and re-rendered
  • The default width of component front label is 120px. If you need more, please change the style variable --bb-row-label-width in the project style file or remove RowType.Inline

In this example, set the ShowLabelTooltip in the form-inline style to true to make the mouse hover over the cropped label to display the complete information

Place the support form components into the ValidateForm

Demo

Examples of components that support form validation

Example illustration

  • The name is the string type
  • The age is an integer type
  • Birthday is the datetime type
  • Education is an enumeration type
  • Hobbies are collection types

In this example, by setting the submit button property IsAsync to submit the form asynchronously, click Submit to disable itself, and resume after the asynchronous operation is complete

Name
Test
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Set the custom error message by calling SetError method

Demo

Scenario

the client verification after the pass of the database save operation, if other problems, you can still make a form custom error prompt, in this case, after the data verification is legal, click the submit form button, the name field will show, the database already exists such a custom prompt

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This component checks the model binding field values within the form by default, setting the ValidateAllProperties values if you need to check all field values for the model

Demo

The Address is not placed in this example, because the ValidateAllProperties parameter value is true, the Addres field is still checked, and OnInvalidSubmit is triggered when the data is submitted after all the data in the timely form is legitimate callback delegate

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Supports any complex type of binding and validation

Demo

The second binding in this example is a super-complex type ComplexModel.Dummy.Dummy2.Name Empty the value, click submit the formvalidate the data. After the second text box verifies compliance, the error prompt is displayed again by calling the SetError

ComplexForm.SetError('Dummy.Dummy2.Name','数据库中已存在');

By changing the components within the form, verify that the form can still be validated correctly

Demo

Click the Change componentbutton address The component changes to count components, reset componentbutton recovery, name address component is required, count The component has a default value of 0 So you can check through the data

Set the alignment of labels throughout the station or in a specific form with style uniformity

Demo

Address text box adds email addressvalidation rules

<EditorItem @bind-Field="@context.Address" ValidateRules="@CustomerRules" />
Loading...

Add custom validation rules by setting Rules

Demo

Address text box adds email addressverification rules, click On Submission to verify

protected override void OnInitialized()
{
    base.OnInitialized();
    // Add mailbox validation rules
    CustomerRules.Add(new CustomerValidator(new EmailAddressAttribute()));

    // Used in Razor files
    // <BootstrapInput @bind-Value="@Model.Address" ValidateRules="@CustomerRules" />
}

call the ValidateForm instance method Validate for trigger the form validation

Demo

The button is not submit button. so not trigger the form submit action, in this sample code use OnClickWithoutRender parameter for improve performance.

[NotNull]
private ValidateForm? ValidatorForm { get; set; }

private Task OnClickValidate()
{
    ValidatorForm.Validate();
    return Task.CompletedTask;
}

Attributes

Loading...

Methods

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@page "/validateforms"
@inject IStringLocalizer<ValidateForms> Localizer

<h3>ValidateForm</h3>

<h4>Form components that can be used for data compliance checks</h4>

<DemoBlock Title="Basic usage" Introduction="Data compliance checks are automatically performed when components placed in the <code>ValidateForm</code> are submitted" Name="Normal">
    <p><b>Introduction</b></p>
    <ul class="ul-demo mb-3">
        <li><code>ValidateForm</code> component supports asynchronous setting of <code>Model</code> values</li>
        <li>The form event is for <code>OnValidSubmit</code> <code>OnInvalidSubmit</code></li>
        <li><code>Model</code> parameter is required is not allowed to be empty</li>
        <li>Multiple buttons can be placed within the form to set whether the <code>ButtonType='ButtonType.Submit'</code> parameter is submitted to the form</li>
        <li>The client authentication mechanism supports the model's <code>Required</code> label, setting the default English prompt information when not set by setting the <code>ErrorMessage</code> parameter prompt</li>
        <li>The form checks by default whether the binding field values within the form are legitimate, and you can set the <code>ValidateAllProperties</code> property value to <code>true</code> if you need to check all fields in the model</li>
        <li>Set the asynchronous submission form by setting the value of the Button <code>Button</code> property <code>IsAsync</code></li>
        <li>After the value of the component control in the form is modified, the <code>OnFieldChanged</code> method is called</li>
    </ul>
    <p><b>Note:</b></p>
    <ul class="ul-demo mb-3">
        <li>Components within a form are typically used to bind the property values of <code>Model</code> in both directions using bidirectional binding techniques, causing the component to refresh and re-render when its value changes <code>StateHasChanged</code>, and the method is called, i.e. its component or page is refreshed and re-rendered</li>
        <li>The default width of component front label is <code>120px</code>. If you need more, please change the style variable <code>--bb-row-label-width</code> in the project style file or remove <code>RowType.Inline</code></li>
    </ul>
    <p>In this example, set the <code>ShowLabelTooltip</code> in the <code>form-inline</code> style to <code>true</code> to make the mouse hover over the cropped label to display the complete information</p>
    <ValidateForm Model="@Model" OnFieldValueChanged="@OnFiledChanged"
                  OnValidSubmit="@OnValidSubmit1" OnInvalidSubmit="@OnInvalidSubmit1">
        <div class="row g-3">
            <div class="col-12">
                <BootstrapInput @bind-Value="@Model.Name" DisplayText="I am very long display text" />
            </div>
        </div>
        <div class="row g-3 form-inline mt-0">
            <div class="col-12">
                <BootstrapInput @bind-Value="@Model.Address" DisplayText="I am very long display text" ShowLabelTooltip="true" />
            </div>
            <div class="col-12">
                <Button ButtonType="ButtonType.Submit" Icon="fa fa-fw fa-save" Text="Submit" IsAsync="true" />
            </div>
        </div>
    </ValidateForm>
    <BlockLogger @ref="Trace" class="mt-3" />
</DemoBlock>

<DemoBlock Title="Built-in components" Introduction="Place the support form components into the <code>ValidateForm</code>" Name="InnerComponent">
    <p class="legend">Examples of components that support form validation</p>
    <p>Example illustration</p>
    <ul class="ul-demo mb-3">
        <li>The name is the string type</li>
        <li>The age is an integer type</li>
        <li>Birthday is the datetime type</li>
        <li>Education is an enumeration type</li>
        <li>Hobbies are collection types</li>
    </ul>
    <p>In this example, by setting the <b>submit button</b> property <code>IsAsync</code> to submit the form asynchronously, click Submit to disable itself, and resume after the asynchronous operation is complete</p>
    <ValidateForm Model="@Model" OnValidSubmit="@OnValidSubmit"
                  OnInvalidSubmit="@OnInvalidSubmit">
        <div class="row g-3">
            <div class="col-12 col-sm-6">
                <BootstrapInputGroupLabel @bind-Value="@Model.Name" />
                <BootstrapInputGroup>
                    <Display @bind-Value="@Model.Name"></Display>
                    <BootstrapInputGroupLabel DisplayText="Test" />
                </BootstrapInputGroup>
            </div>
            <div class="col-12 col-sm-6">
                <BootstrapInputNumber @bind-Value="@Model.Count" />
            </div>
            <div class="col-12 col-sm-6">
                <DateTimePicker @bind-Value="@Model.DateTime" />
            </div>
            <div class="col-12 col-sm-6">
                <Select @bind-Value="@Model.Education" />
            </div>
            <div class="col-12">
                <CheckboxList @bind-Value="@Model.Hobby" Items="@Hobbys" />
            </div>
            <div class="col-12">
                <Button ButtonType="@ButtonType.Submit" Icon="fa fa-fw fa-save" IsAsync="true" Text="Submit" />
            </div>
        </div>
    </ValidateForm>
    <BlockLogger @ref="Trace2" class="mt-3" />
</DemoBlock>

<DemoBlock Title="Custom displays error messages" Introduction="Set the custom error message by calling <code>SetError</code> method" Name="CustomDisplsyError">
    <p><b>Scenario</b><p>the client verification after the pass of the database save operation, if other problems, you can still make a form custom error prompt, in this case, after the data verification is legal, click the <code>submit form</code> button, the name field will show, <code>the database already exists</code> such a custom prompt</p></p>
    <ValidateForm @ref="FooForm" Model="@Model" OnValidSubmit="@OnValidSetError">
        <div class="row g-3">
            <div class="col-12 col-sm-6">
                <BootstrapInput @bind-Value="@Model.Name" />
            </div>
            <div class="col-12 col-sm-6">
                <BootstrapInputNumber @bind-Value="@Model.Count" />
            </div>
            <div class="col-12 col-sm-6">
                <DateTimePicker @bind-Value="@Model.DateTime" />
            </div>
            <div class="col-12 col-sm-6">
                <Select @bind-Value="@Model.Education" />
            </div>
            <div class="col-12">
                <CheckboxList @bind-Value="@Model.Hobby" Items="@Hobbys" />
            </div>
            <div class="col-12">
                <Button ButtonType="@ButtonType.Submit" Text="Submit" />
            </div>
        </div>
    </ValidateForm>
</DemoBlock>

<DemoBlock Title="Validate all field values" Introduction="This component checks the model binding field values within the form by default, setting the <code>ValidateAllProperties</code> values if you need to check all field values for the model" Name="ValidatorAllField">
    <p>The <code>Address</code> is not placed in this example, because the <code>ValidateAllProperties</code> parameter value is <code>true</code>, the <code>Addres</code> field is still checked, and <code>OnInvalidSubmit</code> is triggered when the data is submitted after all the data in the timely form is legitimate callback delegate</p>
    <ValidateForm Model="@Model" OnInvalidSubmit="@OnInvalidSubmitAddress"
                  ValidateAllProperties="true">
        <div class="row g-3">
            <div class="col-12 col-sm-6">
                <BootstrapInput @bind-Value="@Model.Name" />
            </div>
            <div class="col-12 col-sm-6">
                <BootstrapInputNumber @bind-Value="@Model.Count" />
            </div>
            <div class="col-12 col-sm-6">
                <DateTimePicker @bind-Value="@Model.DateTime" />
            </div>
            <div class="col-12 col-sm-6">
                <Select @bind-Value="@Model.Education" />
            </div>
            <div class="col-12">
                <CheckboxList @bind-Value="@Model.Hobby" Items="@Hobbys" />
            </div>
            <div class="col-12">
                <Button ButtonType="@ButtonType.Submit" Text="Submit" />
            </div>
        </div>
    </ValidateForm>
    <BlockLogger @ref="Trace3" class="mt-3" />
</DemoBlock>

<DemoBlock Title="Complex type support" Introduction="Supports any complex type of binding and validation" Name="ComplexValidation">
    <p>The second binding in this example is a super-complex type <code>ComplexModel.Dummy.Dummy2.Name</code> Empty the value, click <b>submit the form</b>validate the data. After the second text box verifies compliance, the error prompt is displayed again by calling the <code>SetError</code></p>
    <Pre>ComplexForm.SetError('Dummy.Dummy2.Name','数据库中已存在');</Pre>
    <ValidateForm @ref="ComplexForm" Model="@ComplexModel" OnInvalidSubmit="@OnInvalidComplexModel"
                  OnValidSubmit="@OnValidComplexModel">
        <div class="row g-3">
            <div class="col-12 col-sm-6">
                <BootstrapInput @bind-Value="@ComplexModel.Name" />
            </div>
            <div class="col-12 col-sm-6">
                <BootstrapInput @bind-Value="@ComplexModel.Dummy.Dummy2.Name" />
            </div>
            <div class="col-12">
                <Button ButtonType="@ButtonType.Submit" Text="Submit" />
            </div>
        </div>
    </ValidateForm>
    <BlockLogger @ref="Trace4" class="mt-3" />
    <p class=mt-3>
        @foreach (var key in GetValueChagnedFieldCollection())
        {
            <div>
                <span>@key.Key.Model.GetType().Name</span>.<span>@key.Key.FieldName</span>: <span>@key.Value</span>
            </div>
        }
    </p>
</DemoBlock>

<DemoBlock Title="Dynamically adjust the components within the form" Introduction="By changing the components within the form, verify that the form can still be validated correctly" Name="DynamicForm">
    <p>Click the <b>Change component</b>button <code>address</code> The component changes to <code>count</code> components, <b>reset component</b>button recovery, <code>name</code> <code>address</code> component is required, <code>count</code> The component has a default value of <code>0</code> So you can check through the data</p>
    <ValidateForm Model="@DynamicModel" OnInvalidSubmit="@OnInvalidDynamicModel"
                  OnValidSubmit="@OnValidDynamicModel">
        <div class="row g-3">
            <div class="col-12 col-sm-6">
                <BootstrapInput @bind-Value="@DynamicModel.Name" />
            </div>
            <div class="col-12 col-sm-6">
                @if (ShowAddress)
                {
                    <BootstrapInput @bind-Value="@DynamicModel.Address" />
                }
                else
                {
                    <BootstrapInput @bind-Value="@DynamicModel.Count" />
                }
            </div>
            <div class="col-12">
                <Button ButtonType="@ButtonType.Submit" Text="Submit" />
                <Button Text="Change" OnClick="OnValidateChange" class="ms-3" />
                <Button Text="Reset" OnClick="OnValidateReset" class="ms-3" />
            </div>
        </div>
    </ValidateForm>
    <BlockLogger @ref="Trace5" class="mt-3" />
</DemoBlock>

<DemoBlock Title="Set the component label right alignment within the form" Introduction="Set the alignment of labels throughout the station or in a specific form with style uniformity" Name="InnerFormLabel">
    <p>Address text box adds <b>email address</b>validation rules</p>
    <Pre><EditorItem @bind-Field="@context.Address" ValidateRules="@CustomerRules" /></Pre>
    <ValidateForm Model="@Model">
        <EditorForm TModel="Foo" ItemsPerRow="2" RowType="RowType.Inline" LabelAlign="Alignment.Right">
            <FieldItems>
                <EditorItem @bind-Field="@context.Address" ValidateRules="@CustomerRules" />
                <EditorItem @bind-Field="@context.Hobby" Items="@Hobbys" />
            </FieldItems>
        </EditorForm>
    </ValidateForm>
</DemoBlock>

<DemoBlock Title="Customize the verification form" Introduction="Add custom validation rules by setting <code>Rules</code>" Name="CustomValidationForm">
    <p>Address text box adds <b>email address</b>verification rules, click On Submission to verify</p>
    <Pre>protected override void OnInitialized()
{
    base.OnInitialized();
    // Add mailbox validation rules
    CustomerRules.Add(new CustomerValidator(new EmailAddressAttribute()));

    // Used in Razor files
    // <BootstrapInput @bind-Value="@Model.Address" ValidateRules="@CustomerRules" />
}</Pre>
    <ValidateForm Model="@Model">
        <div class="row g-3">
            <div class="col-12 col-sm-6">
                <BootstrapInput @bind-Value="@Model.Name" />
            </div>
            <div class="col-12 col-sm-6">
                <BootstrapInput @bind-Value="@Model.Address" ValidateRules="@CustomerRules" />
            </div>
            <div class="col-12">
                <Button ButtonType="@ButtonType.Submit" Text="Submit" />
            </div>
        </div>
    </ValidateForm>
</DemoBlock>

<DemoBlock Title="Manual Validate" Introduction="call the <code>ValidateForm</code> instance method <code>Validate</code> for trigger the form validation" Name="Validate">
    <p>The button is not submit button. so not trigger the form <code>submit</code> action, in this sample code use <code>OnClickWithoutRender</code> parameter for improve performance.</p>
    <ValidateForm Model="@Model" @ref="ValidatorForm">
        <div class="row g-3">
            <div class="col-12 col-sm-6">
                <BootstrapInput @bind-Value="@Model.Name" />
            </div>
            <div class="col-12 col-sm-6">
                <BootstrapInput @bind-Value="@Model.Address" />
            </div>
        </div>
    </ValidateForm>
    <Button Icon="fa fa-save" Text="Save" OnClickWithoutRender="OnValidator" class="my-3"></Button>
    <Pre>[NotNull]
private ValidateForm? ValidatorForm { get; set; }

private Task OnClickValidate()
{
    ValidatorForm.Validate();
    return Task.CompletedTask;
}</Pre>
</DemoBlock>

<AttributeTable Items="@GetAttributes()" />

<MethodTable Items="@GetMethods()" />
// Copyright (c) Argo Zhang (argo@163.com). All rights reserved.
// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
// Website: https://www.blazor.zone or https://argozhang.github.io/

using BootstrapBlazor.Components;
using BootstrapBlazor.Shared.Common;
using BootstrapBlazor.Shared.Components;
using Microsoft.AspNetCore.Components;
using Microsoft.AspNetCore.Components.Forms;
using Microsoft.Extensions.Localization;
using System.Collections.Concurrent;
using System.ComponentModel.DataAnnotations;

namespace BootstrapBlazor.Shared.Samples;

/// <summary>
///
/// </summary>
public partial class ValidateForms
{
    [NotNull]
    private BlockLogger? Trace { get; set; }

    [NotNull]
    private BlockLogger? Trace2 { get; set; }

    [NotNull]
    private BlockLogger? Trace3 { get; set; }

    [NotNull]
    private BlockLogger? Trace4 { get; set; }

    [Inject]
    [NotNull]
    private IStringLocalizer<Foo>? LocalizerFoo { get; set; }

    [NotNull]
    private Foo? Model { get; set; }

    [NotNull]
    private IEnumerable<SelectedItem>? Hobbys { get; set; }

    [NotNull]
    private ValidateForm? FooForm { get; set; }

    [NotNull]
    private ValidateForm? ComplexForm { get; set; }

    [NotNull]
    private ComplexFoo? ComplexModel { get; set; }

    private List<IValidator> CustomerRules { get; } = new();

    /// <summary>
    /// 
    /// </summary>
    protected override void OnInitialized()
    {
        base.OnInitialized();

        CustomerRules.Add(new FormItemValidator(new EmailAddressAttribute()));
    }

    /// <summary>
    /// OnInitializedAsync 方法
    /// </summary>
    /// <returns></returns>
    protected override async Task OnInitializedAsync()
    {
        await base.OnInitializedAsync();

        // 切换线程 模拟异步通过 webapi 加载数据
        await Task.Yield();

        Model = new() { Name = "Name", Education = EnumEducation.Primary, DateTime = DateTime.Now };

        // 初始化参数
        Hobbys = Foo.GenerateHobbys(LocalizerFoo);
        ComplexModel = new ComplexFoo()
        {
            Dummy = new Dummy1() { Dummy2 = new Dummy2() },
        };
    }

    [NotNull]
    private ValidateForm? ValidatorForm { get; set; }

    private Task OnValidator()
    {
        ValidatorForm.Validate();
        return Task.CompletedTask;
    }

    private Task OnInvalidSubmit1(EditContext context)
    {
        Trace.Log(Localizer["OnInvalidSubmitLog"]);
        return Task.CompletedTask;
    }

    private async Task OnValidSubmit1(EditContext context)
    {
        await Task.Delay(1000);
        Trace.Log(Localizer["OnValidSubmitLog"]);
    }

    private void OnFiledChanged(string field, object? value)
    {
        Trace.Log($"{field}:{value}");
    }

    private async Task OnValidSubmit(EditContext context)
    {
        Trace2.Log(Localizer["OnValidSubmitSatringLog"]);
        await Task.Delay(3000);
        Trace2.Log(Localizer["OnValidSubmitDoneLog"]);
    }

    private Task OnInvalidSubmit(EditContext context)
    {
        Trace2.Log(Localizer["OnInvalidSubmitCallBackLog"]);
        return Task.CompletedTask;
    }

    private Task OnInvalidSubmitAddress(EditContext context)
    {
        Trace3.Log(Localizer["OnInvalidSubmitCallBackLog"]);
        return Task.CompletedTask;
    }

    private Task OnInvalidComplexModel(EditContext context)
    {
        Trace4.Log(Localizer["OnInvalidSubmitCallBackLog"]);
        return Task.CompletedTask;
    }

    private Task OnValidComplexModel(EditContext context)
    {
        Trace4.Log(Localizer["OnValidSubmitCallBackLog"]);
        ComplexForm.SetError("Dummy.Dummy2.Name", Localizer["DatabaseExistLog"]);
        return Task.CompletedTask;
    }

    private Task OnValidSetError(EditContext context)
    {
        FooForm.SetError<Foo>(f => f.Name, Localizer["DatabaseExistLog"]);
        return Task.CompletedTask;
    }

    private ConcurrentDictionary<FieldIdentifier, object?> GetValueChagnedFieldCollection() => ComplexForm?.ValueChagnedFields ?? new ConcurrentDictionary<FieldIdentifier, object?>();

    #region 动态更改表单内验证组件
    [NotNull]
    private BlockLogger? Trace5 { get; set; }

    private bool ShowAddress { get; set; }

    private Foo DynamicModel { get; set; } = new Foo();

    private Task OnInvalidDynamicModel(EditContext context)
    {
        Trace5.Log(Localizer["OnInvalidSubmitCallBackLog"]);
        return Task.CompletedTask;
    }

    private Task OnValidDynamicModel(EditContext context)
    {
        Trace5.Log(Localizer["OnValidSubmitCallBackLog"]);
        return Task.CompletedTask;
    }

    private void OnValidateChange()
    {
        ShowAddress = true;
    }

    private void OnValidateReset()
    {
        ShowAddress = false;
    }
    #endregion

    private class ComplexFoo : Foo
    {
        [NotNull]
        public Dummy1? Dummy { get; set; }
    }

    private class Dummy1
    {
        [NotNull]
        public Dummy2? Dummy2 { get; set; }
    }

    private class Dummy2
    {
        [Required]
        public string? Name { get; set; }
    }

    #region 参数说明
    private IEnumerable<AttributeItem> GetAttributes() => new AttributeItem[]
    {
        // TODO: 移动到数据库中
        new AttributeItem() {
            Name = "Model",
            Description = Localizer["Model"],
            Type = "object",
            ValueList = " — ",
            DefaultValue = " — "
        },
        new AttributeItem() {
            Name = "ValidateAllProperties",
            Description = Localizer["ValidateAllProperties"],
            Type = "bool",
            ValueList = "true/false",
            DefaultValue = "false"
        },
        new AttributeItem() {
            Name = "ShowRequiredMark",
            Description = Localizer["ShowRequiredMark"],
            Type = "bool",
            ValueList = "true/false",
            DefaultValue = "true"
        },
        new AttributeItem() {
            Name = "ShowLabelTooltip",
            Description = Localizer["ShowLabelTooltip"],
            Type = "bool?",
            ValueList = "true/false/null",
            DefaultValue = "null"
        },
        new AttributeItem() {
            Name = "ChildContent",
            Description = Localizer["ChildContent"],
            Type = "RenderFragment",
            ValueList = " — ",
            DefaultValue = " — "
        },
        new AttributeItem() {
            Name = "OnValidSubmit",
            Description = Localizer["OnValidSubmit"],
            Type = "EventCallback<EditContext>",
            ValueList = " — ",
            DefaultValue = " — "
        },
        new AttributeItem() {
            Name = "OnInvalidSubmit",
            Description = Localizer["OnInvalidSubmit"],
            Type = "EventCallback<EditContext>",
            ValueList = " — ",
            DefaultValue = " — "
        }
    };

    /// <summary>
    /// 获得事件方法
    /// </summary>
    /// <returns></returns>
    private IEnumerable<MethodItem> GetMethods() => new MethodItem[]
    {
        new MethodItem()
        {
            Name = "SetError",
            Description = Localizer["SetError"],
            Parameters = "PropertyName, ErrorMessage",
            ReturnValue = " — "
        },
        new MethodItem()
        {
            Name = "Validate",
            Description = Localizer["Validate"],
            Parameters = " — ",
            ReturnValue = "boolean"
        }
    };
    #endregion
}

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