Question

我正在尝试从.resx文件读取数据。它在视图中工作正常，但是在.cs中使用时遇到麻烦。

我遇到此运行时错误：

对象引用未设置为对象的实例

MailComposer.cs

    IStringLocalizer<SharedResources> SharedLocalizer;


public void SendActivityCreated (Activity entity) {
            var path = Path.Combine (environment.ContentRootPath, "wwwroot", "mail_templates", "activity_created", "index.html");
            var template = File.ReadAllText (path);
            template = template.Replace ("##ID##", entity.ID.ToString ());
            var x = SharedLocalizer["NewActivity"]; // Getting "Object reference not set to an instance of an object" here
            var title = $"Platform.Ge - {x} #{entity.ID}";
            var responsibleEmail = template.Replace ("##USER##", entity.Responsible.Name);
            emailSender.SendEmailAsync (entity.Responsible.Email, title, responsibleEmail);

        }

Startup.cs

services.Configure<RequestLocalizationOptions> (opts => {
    var supportedCultures = new [] {
    new CultureInfo ("en"),
    new CultureInfo ("ka"),
    new CultureInfo ("ru")
    };

    opts.DefaultRequestCulture = new RequestCulture ("ka");
    // Formatting numbers, dates, etc.
    opts.SupportedCultures = supportedCultures;
    // UI strings that we have localized.
    opts.SupportedUICultures = supportedCultures;
  });

我有SharedResources.ka.resx和SharedResources.en.resx文件。如何从MailComposer.cs的SharedLocalizer实例中的这两个文件中获取数据？

Answer 1

解决方案1：

在SharedResources中注入MailComposer.cs：

IStringLocalizer<SharedResource> SharedLocalizer;

public MailComposer(IStringLocalizer<SharedResource> _SharedLocalizer)
{
    SharedLocalizer = _SharedLocalizer;
}

在Startup.cs中添加以下行：

services.AddScoped<MailComposer>();

在要调用MailComposer函数的位置注入SendActivityCreated：

private readonly MailComposer _mailComposer;
public  HomeController(MailComposer mailComposer){

    _mailComposer = mailComposer;
}

并像这样使用：

_mailComposer.SendActivityCreated(entity);

解决方案2：

在SharedResources中注入MailComposer.cs：

IStringLocalizer<SharedResource> SharedLocalizer;

public MailComposer(IStringLocalizer<SharedResource> _SharedLocalizer)
{
    SharedLocalizer = _SharedLocalizer;
}

在要调用IStringLocalizer<SharedResource>函数的位置注入SendActivityCreated：

private readonly IStringLocalizer<SharedResource> _localizer;
public  HomeController(IStringLocalizer<SharedResource> localizer){

    _localizer = localizer;
}

并像这样使用：

MailComposer a = new MailComposer(_localizer);
a.SendActivityCreated(entity);

.res文件在.cs文件中使用时为空

1 个答案: