Razor Pages 中双值输入字段的本地化

Question

在我的 ViewModel 中，我有一个属性这样的：

[DisplayFormat(DataFormatString = "{0:0.00}", ApplyFormatInEditMode = true)]        
public double SomeDoubleProperty { get; set; }

标记：

<div class="form-group row">
    <label asp-for="ViewModel.SomeDoubleProperty" class="col-sm-3 col-form-label">
        @Localizer[nameof(Model.ViewModel.SomeDoubleProperty)]
    </label>
    <div class="col-sm-9">
        <div class="input-group">
            <div class="input-group-prepend">
                <span class="input-group-text">%</span>
            </div>
            <input asp-for="ViewModel.SomeDoubleProperty"
                   class="form-control">
        </div>
        <span asp-validation-for="ViewModel.SomeDoubleProperty" class="text-danger"></span>
    </div>
</div>

加载页面后（默认值为 0）在输入字段中显示如下：

（线程的当前文化和当前 ui 文化是 "de"，所以小数分隔符“,”是预期的）。

但是当我现在离开输入字段时，显示以下验证错误：

The field SomeDoubleProperty must be a number.

用“.”替换“,”时，验证器接受该值。如果当前 ui 文化是 "de"，我怎样才能让“,”也被接受？

Answer 1

您需要下载并配置客户端验证脚本：

cldrjs
cldr-data
globalizejs

在项目的根目录中创建一个新文件，将其命名为 "libman.json" 并向其中添加以下库：

{
  "version": "1.0",
  "defaultProvider": "jsdelivr",
  "libraries": [
    {
      "library": "cldrjs@0.5.1",
      "destination": "wwwroot/lib/cldr"
    },
    {
      "library": "cldr-data@35.1.0",
      "destination": "wwwroot/lib/cldr-data"
    },
    {
      "library": "globalize@1.4.2",
      "destination": "wwwroot/lib/globalize"
    }
  ]
}

当您保存文件时，它会将所有脚本下载到 wwwroor/lib 文件夹。

然后打开 wwwroot/lib/cldr-data/package.json 并将以下几行添加到页面末尾结束括号之前：

"peerDependencies": {
    "cldr-data": ">=26"
  }

当您保存文件时，它将下载所有文化的所有 json 数据（编号、日期、时间、货币等）。下载可能需要一段时间 (~35MB)。

还有一个js库"jquery.validate.globalize.min.js"需要安装但是jsdelivr 0.1.1的版本不兼容，我们需要v1.0，所以要么从GitHub手动下载或者只需使用来自 GitHub 的 jsdelivr 导入功能，如下所示：

<script src="https://cdn.jsdelivr.net/gh/johnnyreilly/jquery-validation-globalize@1.0.0/jquery.validate.globalize.min.js"></script>

然后创建一个新的局部视图，将其命名为“_LocalizationValidationScriptsPartial.cshtml”并向其中添加库：

<!-- cldr scripts (needed for globalize) -->
<script src="/lib/cldr/dist/cldr.min.js"></script>
<script src="/lib/cldr/dist/cldr/event.min.js"></script>
<script src="/lib/cldr/dist/cldr/supplemental.min.js"></script>

<!-- globalize scripts -->
<script src="/lib/globalize/dist/globalize.min.js"></script>
<script src="/lib/globalize/dist/globalize/number.min.js"></script>
<script src="/lib/globalize/dist/globalize/date.min.js"></script>
<script src="/lib/globalize/dist/globalize/currency.min.js"></script>

<!-- this file can be downloaded from : -->
<!-- https://github.com/johnnyreilly/jquery-validation-globalize -->
<script src="https://cdn.jsdelivr.net/gh/johnnyreilly/jquery-validation-globalize@1.0.0/jquery.validate.globalize.min.js"></script>

<!-- code to get check if current cultures scripts are exists -->
<!-- if not, select parent cultures scripts -->
@inject Microsoft.AspNetCore.Hosting.IHostingEnvironment HostingEnvironment
@{
    string GetDefaultLocale()
    {
        const string localePattern = "lib\cldr-data\main\{0}";
        var currentCulture = System.Globalization.CultureInfo.CurrentCulture;
        var cultureToUse = "en"; //Default regionalisation to use

        if (System.IO.Directory.Exists(System.IO.Path.Combine(HostingEnvironment.WebRootPath, string.Format(localePattern, currentCulture.Name))))
            cultureToUse = currentCulture.Name;
        else if (System.IO.Directory.Exists(System.IO.Path.Combine(HostingEnvironment.WebRootPath, string.Format(localePattern, currentCulture.TwoLetterISOLanguageName))))
            cultureToUse = currentCulture.TwoLetterISOLanguageName;

        return cultureToUse;
    }
}

<script type="text/javascript">
    var culture = "@GetDefaultLocale()";
    $.when(
        $.get("/lib/cldr-data/supplemental/likelySubtags.json"),
        $.get("/lib/cldr-data/main/" + culture + "numbers.json"),
        $.get("/lib/cldr-data/main/" + culture + "/currencies.json"),
        $.get("/lib/cldr-data/supplemental/numberingSystems.json"),
        $.get("/lib/cldr-data/main/" + culture + "/ca-gregorian.json"),
        $.get("/lib/cldr-data/main/" + culture + "/timeZoneNames.json"),
        $.get("/lib/cldr-data/supplemental/timeData.json"),
        $.get("/lib/cldr-data/supplemental/weekData.json"),
    ).then(function () {
        // Normalize $.get results, we only need the JSON, not the request statuses.
        return [].slice.apply(arguments, [0]).map(function (result) {
            return result[0];
        });
    }).then(Globalize.load).then(function () {
        Globalize.locale(culture);
    });
</script>

最后，只需在需要进行本地化验证的默认 _ValidationScriptsPartial.cshtml 之后包含此部分视图。

<partial name="_ValidationScriptsPartial.cshtml" />
<partial name="_LocalizationValidationScriptsPartial.cshtml" />

替代方法

我创建了一个 TagHelperComponent 来避免所有繁重的工作，您甚至不需要将脚本下载到本地。

安装 nuget 包：

Install-Package LazZiya.TagHelpers -Version 2.1.0

将 LazZiya.TagHelpers 添加到 _ViewImports :

@using LazZiya.TagHelpers
@addTagHelper *, LazZiya.TagHelpers

在启动时注册本地化验证标签助手组件：

services.AddTransient<ITagHelperComponent, LocalizationValidationScriptsTagHelperComponent>();

将标签添加到页面的脚本部分以验证本地化输入字段（还必须加载默认 _ValidationScriptsPartial.cshtml）：

<partial name="_ValidationScriptsPartial.cshtml" />
<localization-validation-scripts></localization-validation-scripts>

此 TagHelper 将自动检测当前区域性名称并添加所有必要的脚本以验证本地化值。

有关详细信息，请参阅 LazZiya.TagHelpers

Answer 2

感谢@Laz Ziya，我找到了一个可以解决问题的组合：

视图模型：

    [DisplayFormat(DataFormatString = "{0:0.00}", ApplyFormatInEditMode = true)]
    [Range(0, 100, ErrorMessage = "RangeAttribute_ValidationError")]
    public double SomeDoubleProperty { get; set; }

标记：

    <div class="form-group row">
        <label asp-for="ViewModel.SomeDoubleProperty" class="col-sm-3 col-form-label">
            @Localizer[nameof(Model.ViewModel.SomeDoubleProperty)]
        </label>
        <div class="col-sm-9">
            <div class="input-group">
                <div class="input-group-prepend">
                    <span class="input-group-text">%</span>
                </div>
                <input asp-for="ViewModel.SomeDoubleProperty"
                       class="form-control"
                       id="some-double-input" digit-count="2">
            </div>
            <span asp-validation-for="ViewModel.SomeDoubleProperty" class="text-danger"></span>
        </div>
    </div>
<partial name="_NumberInputPartial" />

NumberInputPartial:

 @using System.Threading;

@*To use this partial add the following attribute to the input element: digit-count="{enter requested digit count here}"*@

<script asp-location="Footer">
    function toLocalizedNumberString(numberAsString, digitCount) {
        var decimalSeparator = '@(Thread.CurrentThread.CurrentUICulture.NumberFormat.NumberDecimalSeparator)';
        var groupSeparator = '@(Thread.CurrentThread.CurrentUICulture.NumberFormat.NumberGroupSeparator)';
          var num = parseFloat(numberAsString.replace(decimalSeparator, '.'));
          return ( num
            .toFixed(digitCount)
            .replace('.', decimalSeparator)
            .replace(/(\d)(?=(\d{3})+(?!\d))/g, '' + groupSeparator)
            )
    }
    $("input[digit-count]").on("focusin", function () {
        $(this).val($(this).val().replace(@("/[" + Thread.CurrentThread.CurrentUICulture.NumberFormat.NumberGroupSeparator + "]/g"), ""));
    });
    $("input[digit-count]").on("focusout", function () {
        $(this).val(toLocalizedNumberString($(this).val(), $(this).attr("digit-count")));
    });
</script>

<partial name="_ValidationScriptsPartial" />
<localization-validation-scripts></localization-validation-scripts>

Razor Pages 中双值输入字段的本地化

Localization for input field with double value in Razor Pages

c#

validation

localization

asp.net-core

razor-pages

替代方法