Class ParameterPreconditionAttribute

Namespace

HeyBox.Interactions

Assembly

HeyBox.Net.Interactions.dll

要求参数在执行前满足指定的先决条件。

[AttributeUsage(AttributeTargets.Parameter, AllowMultiple = true, Inherited = true)]
public abstract class ParameterPreconditionAttribute : Attribute

Inheritance

object

Attribute

ParameterPreconditionAttribute

Inherited Members

Attribute.Equals(object)

Attribute.GetCustomAttribute(Assembly, Type)

Attribute.GetCustomAttribute(Assembly, Type, bool)

Attribute.GetCustomAttribute(MemberInfo, Type)

Attribute.GetCustomAttribute(MemberInfo, Type, bool)

Attribute.GetCustomAttribute(Module, Type)

Attribute.GetCustomAttribute(Module, Type, bool)

Attribute.GetCustomAttribute(ParameterInfo, Type)

Attribute.GetCustomAttribute(ParameterInfo, Type, bool)

Attribute.GetCustomAttributes(Assembly)

Attribute.GetCustomAttributes(Assembly, bool)

Attribute.GetCustomAttributes(Assembly, Type)

Attribute.GetCustomAttributes(Assembly, Type, bool)

Attribute.GetCustomAttributes(MemberInfo)

Attribute.GetCustomAttributes(MemberInfo, bool)

Attribute.GetCustomAttributes(MemberInfo, Type)

Attribute.GetCustomAttributes(MemberInfo, Type, bool)

Attribute.GetCustomAttributes(Module)

Attribute.GetCustomAttributes(Module, bool)

Attribute.GetCustomAttributes(Module, Type)

Attribute.GetCustomAttributes(Module, Type, bool)

Attribute.GetCustomAttributes(ParameterInfo)

Attribute.GetCustomAttributes(ParameterInfo, bool)

Attribute.GetCustomAttributes(ParameterInfo, Type)

Attribute.GetCustomAttributes(ParameterInfo, Type, bool)

Attribute.GetHashCode()

Attribute.IsDefaultAttribute()

Attribute.IsDefined(Assembly, Type)

Attribute.IsDefined(Assembly, Type, bool)

Attribute.IsDefined(MemberInfo, Type)

Attribute.IsDefined(MemberInfo, Type, bool)

Attribute.IsDefined(Module, Type)

Attribute.IsDefined(Module, Type, bool)

Attribute.IsDefined(ParameterInfo, Type)

Attribute.IsDefined(ParameterInfo, Type, bool)

Attribute.Match(object)

Attribute.TypeId

object.Equals(object, object)

object.GetType()

object.MemberwiseClone()

object.ReferenceEquals(object, object)

object.ToString()

Properties

ErrorMessage

获取如果执行上下文未满足先决条件检查时返回的错误消息。

public virtual string? ErrorMessage { get; }

Property Value

string

Remarks

在派生类中重写时，如果先决条件未满足，将使用提供的字符串作为错误消息。 对于未重写此属性的类，设置该属性无效。

Methods

CheckRequirementsAsync(IInteractionContext, IParameterInfo, object?, IServiceProvider?)

检查在命令执行前是否满足条件。

public abstract Task<PreconditionResult> CheckRequirementsAsync(IInteractionContext context, IParameterInfo parameterInfo, object? value, IServiceProvider? services)

Parameters

context IInteractionContext

命令的上下文。

parameterInfo IParameterInfo

被检查的命令参数。

value object

参数的原始值。

services IServiceProvider

用于依赖注入的服务集合。

Returns

Task<PreconditionResult>

See Also

PreconditionAttribute