在系统我们自定一个 MySettingProvider,并添加到配置集合中，定义一些邮件参数覆盖默认参数，然后通过IOC容器得到SmtpEmailSender实例，调用send方法就实现了，实现代码如下：
1.自定义配置类
public class MySettingProvider : SettingProvider
{
public override IEnumerable<SettingDefinition> GetSettingDefinitions(SettingDefinitionProviderContext context)
{
return new[]
{
new SettingDefinition(EmailSettingNames.Smtp.Host, "smtp.qq.com"),
new SettingDefinition(EmailSettingNames.Smtp.Port,"25"),
new SettingDefinition(EmailSettingNames.DefaultFromAddress,"834663884@qq.com"),
new SettingDefinition(EmailSettingNames.Smtp.UserName,"834663884@qq.com"),
new SettingDefinition(EmailSettingNames.Smtp.Password,""),
new SettingDefinition(EmailSettingNames.Smtp.UseDefaultCredentials,"false"),
new SettingDefinition(EmailSettingNames.DefaultFromDisplayName,"shuangjie"),
new SettingDefinition(
AbpZeroSettingNames.UserManagement.IsEmailConfirmationRequiredForLogin,
"true",
new FixedLocalizableString("Is email confirmation required for login."),
scopes: SettingScopes.Application | SettingScopes.Tenant
)
};
}
}
2.添加到配置集合，加到模块初始化类里就行
Configuration.Settings.Providers.Add<MySettingProvider>();
3.使用SmtpEmailSender
var emailSender = IocManager.Instance.Resolve<ISmtpEmailSender>();
emailSender.Send(message.Destination, message.Subject, message.Body);
4.下面将框架是如何实现这些操作的
在SmtpEmailSender的构造函数中注入了ISmtpEmailSenderConfiguration，它的实现类是SmtpEmailSenderConfiguration，通过他我们的Send方法得到我们需要的邮箱配置，那让我们看究竟做了什么
public class SmtpEmailSenderConfiguration : EmailSenderConfiguration, ISmtpEmailSenderConfiguration, ITransientDependency
{
public string Host
{
get { return GetNotEmptySettingValue(EmailSettingNames.Smtp.Host); }
}
public int Port
{
get { return SettingManager.GetSettingValue<int>(EmailSettingNames.Smtp.Port); }
}
....
他通过SettingManager的GetSettingValue方法来得到一些配置的值，SettingManager字段，GetNotEmptySettingValue方法来自EmailSenderConfiguration，这里就不粘它的代码了，GetNotEmptySettingValue也是通过SettingManager.GetSettingValue的方式来获得配置数据的，GetSettingValue是SettingManager的扩展方法，接下来就让我看看SettingManager类
public class SettingManager : ISettingManager, ISingletonDependency
{
public Task<string> GetSettingValueAsync(string name)
{
return GetSettingValueInternalAsync(name, AbpSession.TenantId, AbpSession.UserId);
}
private async Task<string> GetSettingValueInternalAsync(string name, int? tenantId = null, long? userId = null)
{
var settingDefinition = _settingDefinitionManager.GetSettingDefinition(name);
//Get for user if defined
if (settingDefinition.Scopes.HasFlag(SettingScopes.User) && userId.HasValue)
{
SettingScope是枚举，有三个值分别是Application、TenantId、UserId，在这里不讲，通过代码们看到获取配置的方法是_settingDefinitionManager的GetSettingDefinition，返回结果是SettingDefinition，这个类主要用来保存Name、Value等等属性，我们要看的是GetSettingDefinition方法，代码如下
internal class SettingDefinitionManager : ISettingDefinitionManager, ISingletonDependency
{
public void Initialize()
{
var context = new SettingDefinitionProviderContext();
foreach (var providerType in _settingsConfiguration.Providers)
{
var provider = CreateProvider(providerType);
foreach (var settings in provider.GetSettingDefinitions(context))
{
_settings[settings.Name] = settings;
}
}
}
public SettingDefinition GetSettingDefinition(string name)
{
SettingDefinition settingDefinition;
if (!_settings.TryGetValue(name, out settingDefinition))
{
throw new AbpException("There is no setting defined with name: " + name);
}
return settingDefinition;
}
通过代码我们看到SettingDefinition来自Provider，也就是我们自定义或默认已有的SettingProvider类，这个类有个方法GetSettingDefinitions，通过它来得到我们的配置，SettingDefinitionManager的Initialize会在程序启动时被调用，详看AbpKernelModule,这个初始化方法就得到了所有的SettingDefinition，这就是大概流程，因为在AbpKernelModule添加的的SettingProvider会早于我们自定义的SettingProvider，所以我们的会覆盖默认的。
到此结束！